2024.06.03

添加新功能：可在便签中添加图片

.gradle/8.4/dependencies-accessors/59ab485aa8f7d177d909be98353b9b11dbf9cc64/sources/org/gradle/accessors/dm/LibrariesForLibs.java

@@ -0,0 +1,227 @@
+package org.gradle.accessors.dm;
+
+import org.gradle.api.NonNullApi;
+import org.gradle.api.artifacts.MinimalExternalModuleDependency;
+import org.gradle.plugin.use.PluginDependency;
+import org.gradle.api.artifacts.ExternalModuleDependencyBundle;
+import org.gradle.api.artifacts.MutableVersionConstraint;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.provider.ProviderFactory;
+import org.gradle.api.internal.catalog.AbstractExternalDependencyFactory;
+import org.gradle.api.internal.catalog.DefaultVersionCatalog;
+import java.util.Map;
+import org.gradle.api.internal.attributes.ImmutableAttributesFactory;
+import org.gradle.api.internal.artifacts.dsl.CapabilityNotationParser;
+import javax.inject.Inject;
+
+/**
+ * A catalog of dependencies accessible via the `libs` extension.
+ */
+@NonNullApi
+public class LibrariesForLibs extends AbstractExternalDependencyFactory {
+
+    private final AbstractExternalDependencyFactory owner = this;
+    private final EspressoLibraryAccessors laccForEspressoLibraryAccessors = new EspressoLibraryAccessors(owner);
+    private final ExtLibraryAccessors laccForExtLibraryAccessors = new ExtLibraryAccessors(owner);
+    private final VersionAccessors vaccForVersionAccessors = new VersionAccessors(providers, config);
+    private final BundleAccessors baccForBundleAccessors = new BundleAccessors(objects, providers, config, attributesFactory, capabilityNotationParser);
+    private final PluginAccessors paccForPluginAccessors = new PluginAccessors(providers, config);
+
+    @Inject
+    public LibrariesForLibs(DefaultVersionCatalog config, ProviderFactory providers, ObjectFactory objects, ImmutableAttributesFactory attributesFactory, CapabilityNotationParser capabilityNotationParser) {
+        super(config, providers, objects, attributesFactory, capabilityNotationParser);
+    }
+
+        /**
+         * Creates a dependency provider for activity (androidx.activity:activity)
+         * This dependency was declared in catalog libs.versions.toml
+         */
+        public Provider<MinimalExternalModuleDependency> getActivity() {
+            return create("activity");
+    }
+
+        /**
+         * Creates a dependency provider for appcompat (androidx.appcompat:appcompat)
+         * This dependency was declared in catalog libs.versions.toml
+         */
+        public Provider<MinimalExternalModuleDependency> getAppcompat() {
+            return create("appcompat");
+    }
+
+        /**
+         * Creates a dependency provider for constraintlayout (androidx.constraintlayout:constraintlayout)
+         * This dependency was declared in catalog libs.versions.toml
+         */
+        public Provider<MinimalExternalModuleDependency> getConstraintlayout() {
+            return create("constraintlayout");
+    }
+
+        /**
+         * Creates a dependency provider for junit (junit:junit)
+         * This dependency was declared in catalog libs.versions.toml
+         */
+        public Provider<MinimalExternalModuleDependency> getJunit() {
+            return create("junit");
+    }
+
+        /**
+         * Creates a dependency provider for material (com.google.android.material:material)
+         * This dependency was declared in catalog libs.versions.toml
+         */
+        public Provider<MinimalExternalModuleDependency> getMaterial() {
+            return create("material");
+    }
+
+    /**
+     * Returns the group of libraries at espresso
+     */
+    public EspressoLibraryAccessors getEspresso() {
+        return laccForEspressoLibraryAccessors;
+    }
+
+    /**
+     * Returns the group of libraries at ext
+     */
+    public ExtLibraryAccessors getExt() {
+        return laccForExtLibraryAccessors;
+    }
+
+    /**
+     * Returns the group of versions at versions
+     */
+    public VersionAccessors getVersions() {
+        return vaccForVersionAccessors;
+    }
+
+    /**
+     * Returns the group of bundles at bundles
+     */
+    public BundleAccessors getBundles() {
+        return baccForBundleAccessors;
+    }
+
+    /**
+     * Returns the group of plugins at plugins
+     */
+    public PluginAccessors getPlugins() {
+        return paccForPluginAccessors;
+    }
+
+    public static class EspressoLibraryAccessors extends SubDependencyFactory {
+
+        public EspressoLibraryAccessors(AbstractExternalDependencyFactory owner) { super(owner); }
+
+            /**
+             * Creates a dependency provider for core (androidx.test.espresso:espresso-core)
+             * This dependency was declared in catalog libs.versions.toml
+             */
+            public Provider<MinimalExternalModuleDependency> getCore() {
+                return create("espresso.core");
+        }
+
+    }
+
+    public static class ExtLibraryAccessors extends SubDependencyFactory {
+
+        public ExtLibraryAccessors(AbstractExternalDependencyFactory owner) { super(owner); }
+
+            /**
+             * Creates a dependency provider for junit (androidx.test.ext:junit)
+             * This dependency was declared in catalog libs.versions.toml
+             */
+            public Provider<MinimalExternalModuleDependency> getJunit() {
+                return create("ext.junit");
+        }
+
+    }
+
+    public static class VersionAccessors extends VersionFactory  {
+
+        public VersionAccessors(ProviderFactory providers, DefaultVersionCatalog config) { super(providers, config); }
+
+            /**
+             * Returns the version associated to this alias: activity (1.8.0)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getActivity() { return getVersion("activity"); }
+
+            /**
+             * Returns the version associated to this alias: agp (8.3.0)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getAgp() { return getVersion("agp"); }
+
+            /**
+             * Returns the version associated to this alias: appcompat (1.6.1)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getAppcompat() { return getVersion("appcompat"); }
+
+            /**
+             * Returns the version associated to this alias: constraintlayout (2.1.4)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getConstraintlayout() { return getVersion("constraintlayout"); }
+
+            /**
+             * Returns the version associated to this alias: espressoCore (3.5.1)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getEspressoCore() { return getVersion("espressoCore"); }
+
+            /**
+             * Returns the version associated to this alias: junit (4.13.2)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getJunit() { return getVersion("junit"); }
+
+            /**
+             * Returns the version associated to this alias: junitVersion (1.1.5)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getJunitVersion() { return getVersion("junitVersion"); }
+
+            /**
+             * Returns the version associated to this alias: material (1.10.0)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getMaterial() { return getVersion("material"); }
+
+    }
+
+    public static class BundleAccessors extends BundleFactory {
+
+        public BundleAccessors(ObjectFactory objects, ProviderFactory providers, DefaultVersionCatalog config, ImmutableAttributesFactory attributesFactory, CapabilityNotationParser capabilityNotationParser) { super(objects, providers, config, attributesFactory, capabilityNotationParser); }
+
+    }
+
+    public static class PluginAccessors extends PluginFactory {
+
+        public PluginAccessors(ProviderFactory providers, DefaultVersionCatalog config) { super(providers, config); }
+
+            /**
+             * Creates a plugin provider for androidApplication to the plugin id 'com.android.application'
+             * This plugin was declared in catalog libs.versions.toml
+             */
+            public Provider<PluginDependency> getAndroidApplication() { return createPlugin("androidApplication"); }
+
+    }
+
+}

.gradle/8.4/dependencies-accessors/59ab485aa8f7d177d909be98353b9b11dbf9cc64/sources/org/gradle/accessors/dm/LibrariesForLibsInPluginsBlock.java

@@ -0,0 +1,269 @@
+package org.gradle.accessors.dm;
+
+import org.gradle.api.NonNullApi;
+import org.gradle.api.artifacts.MinimalExternalModuleDependency;
+import org.gradle.plugin.use.PluginDependency;
+import org.gradle.api.artifacts.ExternalModuleDependencyBundle;
+import org.gradle.api.artifacts.MutableVersionConstraint;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.provider.ProviderFactory;
+import org.gradle.api.internal.catalog.AbstractExternalDependencyFactory;
+import org.gradle.api.internal.catalog.DefaultVersionCatalog;
+import java.util.Map;
+import org.gradle.api.internal.attributes.ImmutableAttributesFactory;
+import org.gradle.api.internal.artifacts.dsl.CapabilityNotationParser;
+import javax.inject.Inject;
+
+/**
+ * A catalog of dependencies accessible via the `libs` extension.
+ */
+@NonNullApi
+public class LibrariesForLibsInPluginsBlock extends AbstractExternalDependencyFactory {
+
+    private final AbstractExternalDependencyFactory owner = this;
+    private final EspressoLibraryAccessors laccForEspressoLibraryAccessors = new EspressoLibraryAccessors(owner);
+    private final ExtLibraryAccessors laccForExtLibraryAccessors = new ExtLibraryAccessors(owner);
+    private final VersionAccessors vaccForVersionAccessors = new VersionAccessors(providers, config);
+    private final BundleAccessors baccForBundleAccessors = new BundleAccessors(objects, providers, config, attributesFactory, capabilityNotationParser);
+    private final PluginAccessors paccForPluginAccessors = new PluginAccessors(providers, config);
+
+    @Inject
+    public LibrariesForLibsInPluginsBlock(DefaultVersionCatalog config, ProviderFactory providers, ObjectFactory objects, ImmutableAttributesFactory attributesFactory, CapabilityNotationParser capabilityNotationParser) {
+        super(config, providers, objects, attributesFactory, capabilityNotationParser);
+    }
+
+        /**
+         * Creates a dependency provider for activity (androidx.activity:activity)
+         * This dependency was declared in catalog libs.versions.toml
+     * @deprecated Will be removed in Gradle 9.0.
+         */
+    @Deprecated
+        public Provider<MinimalExternalModuleDependency> getActivity() {
+        org.gradle.internal.deprecation.DeprecationLogger.deprecateBehaviour("Accessing libraries or bundles from version catalogs in the plugins block.").withAdvice("Only use versions or plugins from catalogs in the plugins block.").willBeRemovedInGradle9().withUpgradeGuideSection(8, "kotlin_dsl_deprecated_catalogs_plugins_block").nagUser();
+            return create("activity");
+    }
+
+        /**
+         * Creates a dependency provider for appcompat (androidx.appcompat:appcompat)
+         * This dependency was declared in catalog libs.versions.toml
+     * @deprecated Will be removed in Gradle 9.0.
+         */
+    @Deprecated
+        public Provider<MinimalExternalModuleDependency> getAppcompat() {
+        org.gradle.internal.deprecation.DeprecationLogger.deprecateBehaviour("Accessing libraries or bundles from version catalogs in the plugins block.").withAdvice("Only use versions or plugins from catalogs in the plugins block.").willBeRemovedInGradle9().withUpgradeGuideSection(8, "kotlin_dsl_deprecated_catalogs_plugins_block").nagUser();
+            return create("appcompat");
+    }
+
+        /**
+         * Creates a dependency provider for constraintlayout (androidx.constraintlayout:constraintlayout)
+         * This dependency was declared in catalog libs.versions.toml
+     * @deprecated Will be removed in Gradle 9.0.
+         */
+    @Deprecated
+        public Provider<MinimalExternalModuleDependency> getConstraintlayout() {
+        org.gradle.internal.deprecation.DeprecationLogger.deprecateBehaviour("Accessing libraries or bundles from version catalogs in the plugins block.").withAdvice("Only use versions or plugins from catalogs in the plugins block.").willBeRemovedInGradle9().withUpgradeGuideSection(8, "kotlin_dsl_deprecated_catalogs_plugins_block").nagUser();
+            return create("constraintlayout");
+    }
+
+        /**
+         * Creates a dependency provider for junit (junit:junit)
+         * This dependency was declared in catalog libs.versions.toml
+     * @deprecated Will be removed in Gradle 9.0.
+         */
+    @Deprecated
+        public Provider<MinimalExternalModuleDependency> getJunit() {
+        org.gradle.internal.deprecation.DeprecationLogger.deprecateBehaviour("Accessing libraries or bundles from version catalogs in the plugins block.").withAdvice("Only use versions or plugins from catalogs in the plugins block.").willBeRemovedInGradle9().withUpgradeGuideSection(8, "kotlin_dsl_deprecated_catalogs_plugins_block").nagUser();
+            return create("junit");
+    }
+
+        /**
+         * Creates a dependency provider for material (com.google.android.material:material)
+         * This dependency was declared in catalog libs.versions.toml
+     * @deprecated Will be removed in Gradle 9.0.
+         */
+    @Deprecated
+        public Provider<MinimalExternalModuleDependency> getMaterial() {
+        org.gradle.internal.deprecation.DeprecationLogger.deprecateBehaviour("Accessing libraries or bundles from version catalogs in the plugins block.").withAdvice("Only use versions or plugins from catalogs in the plugins block.").willBeRemovedInGradle9().withUpgradeGuideSection(8, "kotlin_dsl_deprecated_catalogs_plugins_block").nagUser();
+            return create("material");
+    }
+
+    /**
+     * Returns the group of libraries at espresso
+     * @deprecated Will be removed in Gradle 9.0.
+     */
+    @Deprecated
+    public EspressoLibraryAccessors getEspresso() {
+        org.gradle.internal.deprecation.DeprecationLogger.deprecateBehaviour("Accessing libraries or bundles from version catalogs in the plugins block.").withAdvice("Only use versions or plugins from catalogs in the plugins block.").willBeRemovedInGradle9().withUpgradeGuideSection(8, "kotlin_dsl_deprecated_catalogs_plugins_block").nagUser();
+        return laccForEspressoLibraryAccessors;
+    }
+
+    /**
+     * Returns the group of libraries at ext
+     * @deprecated Will be removed in Gradle 9.0.
+     */
+    @Deprecated
+    public ExtLibraryAccessors getExt() {
+        org.gradle.internal.deprecation.DeprecationLogger.deprecateBehaviour("Accessing libraries or bundles from version catalogs in the plugins block.").withAdvice("Only use versions or plugins from catalogs in the plugins block.").willBeRemovedInGradle9().withUpgradeGuideSection(8, "kotlin_dsl_deprecated_catalogs_plugins_block").nagUser();
+        return laccForExtLibraryAccessors;
+    }
+
+    /**
+     * Returns the group of versions at versions
+     */
+    public VersionAccessors getVersions() {
+        return vaccForVersionAccessors;
+    }
+
+    /**
+     * Returns the group of bundles at bundles
+     * @deprecated Will be removed in Gradle 9.0.
+     */
+    @Deprecated
+    public BundleAccessors getBundles() {
+        org.gradle.internal.deprecation.DeprecationLogger.deprecateBehaviour("Accessing libraries or bundles from version catalogs in the plugins block.").withAdvice("Only use versions or plugins from catalogs in the plugins block.").willBeRemovedInGradle9().withUpgradeGuideSection(8, "kotlin_dsl_deprecated_catalogs_plugins_block").nagUser();
+        return baccForBundleAccessors;
+    }
+
+    /**
+     * Returns the group of plugins at plugins
+     */
+    public PluginAccessors getPlugins() {
+        return paccForPluginAccessors;
+    }
+
+    /**
+     * @deprecated Will be removed in Gradle 9.0.
+     */
+    @Deprecated
+    public static class EspressoLibraryAccessors extends SubDependencyFactory {
+
+        public EspressoLibraryAccessors(AbstractExternalDependencyFactory owner) { super(owner); }
+
+            /**
+             * Creates a dependency provider for core (androidx.test.espresso:espresso-core)
+             * This dependency was declared in catalog libs.versions.toml
+         * @deprecated Will be removed in Gradle 9.0.
+             */
+        @Deprecated
+            public Provider<MinimalExternalModuleDependency> getCore() {
+            org.gradle.internal.deprecation.DeprecationLogger.deprecateBehaviour("Accessing libraries or bundles from version catalogs in the plugins block.").withAdvice("Only use versions or plugins from catalogs in the plugins block.").willBeRemovedInGradle9().withUpgradeGuideSection(8, "kotlin_dsl_deprecated_catalogs_plugins_block").nagUser();
+                return create("espresso.core");
+        }
+
+    }
+
+    /**
+     * @deprecated Will be removed in Gradle 9.0.
+     */
+    @Deprecated
+    public static class ExtLibraryAccessors extends SubDependencyFactory {
+
+        public ExtLibraryAccessors(AbstractExternalDependencyFactory owner) { super(owner); }
+
+            /**
+             * Creates a dependency provider for junit (androidx.test.ext:junit)
+             * This dependency was declared in catalog libs.versions.toml
+         * @deprecated Will be removed in Gradle 9.0.
+             */
+        @Deprecated
+            public Provider<MinimalExternalModuleDependency> getJunit() {
+            org.gradle.internal.deprecation.DeprecationLogger.deprecateBehaviour("Accessing libraries or bundles from version catalogs in the plugins block.").withAdvice("Only use versions or plugins from catalogs in the plugins block.").willBeRemovedInGradle9().withUpgradeGuideSection(8, "kotlin_dsl_deprecated_catalogs_plugins_block").nagUser();
+                return create("ext.junit");
+        }
+
+    }
+
+    public static class VersionAccessors extends VersionFactory  {
+
+        public VersionAccessors(ProviderFactory providers, DefaultVersionCatalog config) { super(providers, config); }
+
+            /**
+             * Returns the version associated to this alias: activity (1.8.0)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getActivity() { return getVersion("activity"); }
+
+            /**
+             * Returns the version associated to this alias: agp (8.3.0)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getAgp() { return getVersion("agp"); }
+
+            /**
+             * Returns the version associated to this alias: appcompat (1.6.1)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getAppcompat() { return getVersion("appcompat"); }
+
+            /**
+             * Returns the version associated to this alias: constraintlayout (2.1.4)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getConstraintlayout() { return getVersion("constraintlayout"); }
+
+            /**
+             * Returns the version associated to this alias: espressoCore (3.5.1)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getEspressoCore() { return getVersion("espressoCore"); }
+
+            /**
+             * Returns the version associated to this alias: junit (4.13.2)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getJunit() { return getVersion("junit"); }
+
+            /**
+             * Returns the version associated to this alias: junitVersion (1.1.5)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getJunitVersion() { return getVersion("junitVersion"); }
+
+            /**
+             * Returns the version associated to this alias: material (1.10.0)
+             * If the version is a rich version and that its not expressible as a
+             * single version string, then an empty string is returned.
+             * This version was declared in catalog libs.versions.toml
+             */
+            public Provider<String> getMaterial() { return getVersion("material"); }
+
+    }
+
+    /**
+     * @deprecated Will be removed in Gradle 9.0.
+     */
+    @Deprecated
+    public static class BundleAccessors extends BundleFactory {
+
+        public BundleAccessors(ObjectFactory objects, ProviderFactory providers, DefaultVersionCatalog config, ImmutableAttributesFactory attributesFactory, CapabilityNotationParser capabilityNotationParser) { super(objects, providers, config, attributesFactory, capabilityNotationParser); }
+
+    }
+
+    public static class PluginAccessors extends PluginFactory {
+
+        public PluginAccessors(ProviderFactory providers, DefaultVersionCatalog config) { super(providers, config); }
+
+            /**
+             * Creates a plugin provider for androidApplication to the plugin id 'com.android.application'
+             * This plugin was declared in catalog libs.versions.toml
+             */
+            public Provider<PluginDependency> getAndroidApplication() { return createPlugin("androidApplication"); }
+
+    }
+
+}

.gradle/buildOutputCleanup/cache.properties

@@ -0,0 +1,2 @@
+#Sun Mar 31 16:12:59 CST 2024
+gradle.version=8.4

.gradle/config.properties

@@ -0,0 +1,2 @@
+#Sun Mar 31 16:12:37 CST 2024
+java.home=D\:\\Andro\\jbr

.idea/.gitignore

@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml

.idea/.name

@@ -0,0 +1 @@
+Notes-master

.idea/compiler.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="17" />
+  </component>
+</project>

.idea/deploymentTargetDropDown.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="deploymentTargetDropDown">
+    <value>
+      <entry key="app">
+        <State>
+          <targetSelectedWithDropDown>
+            <Target>
+              <type value="QUICK_BOOT_TARGET" />
+              <deviceKey>
+                <Key>
+                  <type value="VIRTUAL_DEVICE_PATH" />
+                  <value value="C:\Users\wxsQ\.android\avd\Pixel_2_API_28.avd" />
+                </Key>
+              </deviceKey>
+            </Target>
+          </targetSelectedWithDropDown>
+          <timeTargetWasSelectedWithDropDown value="2024-04-01T12:50:23.436109200Z" />
+        </State>
+      </entry>
+    </value>
+  </component>
+</project>

.idea/gradle.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="17" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="resolveExternalAnnotations" value="false" />
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

.idea/migrations.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectMigrations">
+    <option name="MigrateToGradleLocalJavaHome">
+      <set>
+        <option value="$PROJECT_DIR$" />
+      </set>
+    </option>
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+  <component name="VisualizationToolProject">
+    <option name="state">
+      <ProjectState>
+        <option name="scale" value="0.4768856447688564" />
+      </ProjectState>
+    </option>
+  </component>
+</project>

app/.gitignore

@@ -0,0 +1 @@
+/build

app/build.gradle.kts

@@ -0,0 +1,61 @@
+plugins {
+    alias(libs.plugins.androidApplication)
+}
+
+android {
+    namespace = "net.micode.notes"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "net.micode.notes"
+        minSdk = 24
+        targetSdk = 34
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    packaging {
+        resources.excludes.add("META-INF/DEPENDENCIES");
+        resources.excludes.add("META-INF/NOTICE");
+        resources.excludes.add("META-INF/LICENSE");
+        resources.excludes.add("META-INF/LICENSE.txt");
+        resources.excludes.add("META-INF/NOTICE.txt");
+    }
+}
+
+dependencies {
+
+    implementation(libs.appcompat)
+    implementation(libs.material)
+    implementation(libs.activity)
+    implementation(libs.constraintlayout)
+//    implementation(fileTree(mapOf(
+//        "dir" to "D:\\Notesmaster\\httpcomponents-client-4.5.14-bin\\lib",
+//        "include" to listOf("*.aar", "*.jar"),
+//        "exclude" to listOf("")
+//    )))
+    implementation(files("D:\\Notesmaster\\httpcomponents-client-4.5.14-bin\\lib\\httpclient-osgi-4.5.14.jar"))
+    implementation(files("D:\\Notesmaster\\httpcomponents-client-4.5.14-bin\\lib\\httpclient-win-4.5.14.jar"))
+    implementation(files("D:\\Notesmaster\\httpcomponents-client-4.5.14-bin\\lib\\httpcore-4.4.16.jar"))
+
+
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.ext.junit)
+    androidTestImplementation(libs.espresso.core)
+}

app/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/net/micode/notes/ExampleInstrumentedTest.java

@@ -0,0 +1,26 @@
+package net.micode.notes;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("net.micode.notes", appContext.getPackageName());
+    }
+}

app/src/main/AndroidManifest.xml

@@ -1,26 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-
-<!-- Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
-
-     Licensed under the Apache License, Version 2.0 (the "License");
-     you may not use this file except in compliance with the License.
-     You may obtain a copy of the License at
-
-          http://www.apache.org/licenses/LICENSE-2.0
-
-     Unless required by applicable law or agreed to in writing, software
-     distributed under the License is distributed on an "AS IS" BASIS,
-     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-     See the License for the specific language governing permissions and
-     limitations under the License.
--->
-
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="net.micode.notes"
-    android:versionCode="1"
-    android:versionName="0.1" >
-
-    <uses-sdk android:minSdkVersion="14" />
+    xmlns:tools="http://schemas.android.com/tools">
 
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT" />
@@ -33,8 +13,16 @@
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
 
     <application
-        android:icon="@drawable/icon_app"
-        android:label="@string/app_name" >
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Notesmaster"
+        tools:targetApi="31">
+
         <activity
             android:name=".ui.NotesListActivity"
             android:configChanges="keyboardHidden|orientation|screenSize"
@@ -42,7 +30,8 @@
             android:launchMode="singleTop"
             android:theme="@style/NoteTheme"
             android:uiOptions="splitActionBarWhenNarrow"
-            android:windowSoftInputMode="adjustPan" >
+            android:windowSoftInputMode="adjustPan"
+            android:exported="true">
 
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
@@ -54,7 +43,8 @@
             android:name=".ui.NoteEditActivity"
             android:configChanges="keyboardHidden|orientation|screenSize"
             android:launchMode="singleTop"
-            android:theme="@style/NoteTheme" >
+            android:theme="@style/NoteTheme"
+            android:exported="true">
 
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
@@ -80,6 +70,7 @@
                 android:resource="@xml/searchable" />
         </activity>
 
+
         <provider
             android:name="net.micode.notes.data.NotesProvider"
             android:authorities="micode_notes"
@@ -87,7 +78,8 @@
 
         <receiver
             android:name=".widget.NoteWidgetProvider_2x"
-            android:label="@string/app_widget2x2" >
+            android:label="@string/app_widget2x2"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
                 <action android:name="android.appwidget.action.APPWIDGET_DELETED" />
@@ -100,7 +92,8 @@
         </receiver>
         <receiver
             android:name=".widget.NoteWidgetProvider_4x"
-            android:label="@string/app_widget4x4" >
+            android:label="@string/app_widget4x4"
+            android:exported="true">
 
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
@@ -113,7 +106,8 @@
                 android:resource="@xml/widget_4x_info" />
         </receiver>
 
-        <receiver android:name=".ui.AlarmInitReceiver" >
+        <receiver android:name=".ui.AlarmInitReceiver"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.BOOT_COMPLETED" />
             </intent-filter>
@@ -146,5 +140,17 @@
         <meta-data
             android:name="android.app.default_searchable"
             android:value=".ui.NoteEditActivity" />
+
+        <!--        <activity-->
+        <!--            android:name=".MainActivity"-->
+        <!--            android:exported="true">-->
+        <!--            <intent-filter>-->
+        <!--                <action android:name="android.intent.action.MAIN" />-->
+
+        <!--                <category android:name="android.intent.category.LAUNCHER" />-->
+        <!--            </intent-filter>-->
+        <!--        </activity>-->
+
     </application>
-</manifest>
+
+</manifest>

app/src/main/java/net/micode/notes/MainActivity.java

@@ -0,0 +1,24 @@
+package net.micode.notes;
+
+import android.os.Bundle;
+
+import androidx.activity.EdgeToEdge;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.graphics.Insets;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.WindowInsetsCompat;
+
+public class MainActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        EdgeToEdge.enable(this);
+        setContentView(R.layout.activity_main);
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
+            Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
+            return insets;
+        });
+    }
+}

app/src/main/java/net/micode/notes/data/Contact.java

@@ -1,22 +1,7 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.data;
 
 import android.content.Context;
+
 import android.database.Cursor;
 import android.provider.ContactsContract.CommonDataKinds.Phone;
 import android.provider.ContactsContract.Data;
@@ -24,29 +9,35 @@ import android.telephony.PhoneNumberUtils;
 import android.util.Log;
 
 import java.util.HashMap;
-
-public class Contact {
+//change
+public class Contact { //联系人
     private static HashMap<String, String> sContactCache;
     private static final String TAG = "Contact";
 
-    private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER
-    + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
-    + " AND " + Data.RAW_CONTACT_ID + " IN "
+    // 定义字符串CALLER_ID_SELECTION
+    private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL("
+
+            + Phone.NUMBER
+            + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
+            + " AND " + Data.RAW_CONTACT_ID + " IN "
             + "(SELECT raw_contact_id "
             + " FROM phone_lookup"
             + " WHERE min_match = '+')";
 
+    // 获取联系人
     public static String getContact(Context context, String phoneNumber) {
         if(sContactCache == null) {
             sContactCache = new HashMap<String, String>();
         }
 
+        // 查找HashMap中是否已有phoneNumber信息
         if(sContactCache.containsKey(phoneNumber)) {
             return sContactCache.get(phoneNumber);
         }
 
         String selection = CALLER_ID_SELECTION.replace("+",
                 PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
+        // 查找数据库中phoneNumber的信息
         Cursor cursor = context.getContentResolver().query(
                 Data.CONTENT_URI,
                 new String [] { Phone.DISPLAY_NAME },
@@ -54,20 +45,25 @@ public class Contact {
                 new String[] { phoneNumber },
                 null);
 
+        // 判定查询结果 
+        // moveToFirst()返回第一条
         if (cursor != null && cursor.moveToFirst()) {
             try {
+                // 找到相关信息
                 String name = cursor.getString(0);
                 sContactCache.put(phoneNumber, name);
                 return name;
+                // 异常
             } catch (IndexOutOfBoundsException e) {
                 Log.e(TAG, " Cursor get string error " + e.toString());
                 return null;
             } finally {
                 cursor.close();
             }
+            // 未找到相关信息
         } else {
             Log.d(TAG, "No contact matched with number:" + phoneNumber);
             return null;
         }
     }
-}
+}

app/src/main/java/net/micode/notes/data/Notes.java

@@ -1,25 +1,13 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.data;
 
+import android.content.ContentUris;
 import android.net.Uri;
+// Notes 类中定义了很多常量，这些常量大多是int型和string型
 public class Notes {
     public static final String AUTHORITY = "micode_notes";
     public static final String TAG = "Notes";
+
+    //以下三个常量对NoteColumns.TYPE的值进行设置时会用到
     public static final int TYPE_NOTE     = 0;
     public static final int TYPE_FOLDER   = 1;
     public static final int TYPE_SYSTEM   = 2;
@@ -35,12 +23,24 @@ public class Notes {
     public static final int ID_CALL_RECORD_FOLDER = -2;
     public static final int ID_TRASH_FOLER = -3;
 
-    public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date";
-    public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id";
-    public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id";
-    public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type";
-    public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id";
-    public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date";
+    public static final String INTENT_EXTRA_ALERT_DATE =
+
+            "net.micode.notes.alert_date";
+    public static final String INTENT_EXTRA_BACKGROUND_ID =
+
+            "net.micode.notes.background_color_id";
+    public static final String INTENT_EXTRA_WIDGET_ID =
+
+            "net.micode.notes.widget_id";
+    public static final String INTENT_EXTRA_WIDGET_TYPE =
+
+            "net.micode.notes.widget_type";
+    public static final String INTENT_EXTRA_FOLDER_ID =
+
+            "net.micode.notes.folder_id";
+    public static final String INTENT_EXTRA_CALL_DATE =
+
+            "net.micode.notes.call_date";
 
     public static final int TYPE_WIDGET_INVALIDE      = -1;
     public static final int TYPE_WIDGET_2X            = 0;
@@ -54,13 +54,20 @@ public class Notes {
     /**
      * Uri to query all notes and folders
      */
-    public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");
+    public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" +
+
+            AUTHORITY + "/note");//定义查询便签和文件夹的指针。
+
+//    public static final Uri my_URI = ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI , 10);
 
     /**
      * Uri to query data
      */
-    public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
+    public static final Uri CONTENT_DATA_URI = Uri.parse("content://" +
+
+            AUTHORITY + "/data");//定义查找数据的指针。
 
+    // 定义NoteColumns的常量,用于后面创建数据库的表头
     public interface NoteColumns {
         /**
          * The unique ID for a row
@@ -72,7 +79,7 @@ public class Notes {
          * The parent's id for note or folder
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String PARENT_ID = "parent_id";
+        public static final String PARENT_ID = "parent_id";//为什么会有parent_id
 
         /**
          * Created data for note or folder
@@ -140,7 +147,7 @@ public class Notes {
          * The last sync id
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String SYNC_ID = "sync_id";
+        public static final String SYNC_ID = "sync_id";//同步
 
         /**
          * Sign to indicate local modified or not
@@ -165,8 +172,9 @@ public class Notes {
          * <P> Type : INTEGER (long) </P>
          */
         public static final String VERSION = "version";
-    }
+    }//这些常量主要是定义便签的属性的。
 
+    // 定义DataColumns的常量,用于后面创建数据库的表头
     public interface DataColumns {
         /**
          * The unique ID for a row
@@ -206,41 +214,50 @@ public class Notes {
 
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * Generic data column, the meaning is {@link #MIMETYPE} specific, 
+
+         used for
          * integer data type
          * <P> Type: INTEGER </P>
          */
         public static final String DATA1 = "data1";
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * Generic data column, the meaning is {@link #MIMETYPE} specific, 
+
+         used for
          * integer data type
          * <P> Type: INTEGER </P>
          */
         public static final String DATA2 = "data2";
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * Generic data column, the meaning is {@link #MIMETYPE} specific, 
+
+         used for
          * TEXT data type
          * <P> Type: TEXT </P>
          */
         public static final String DATA3 = "data3";
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * Generic data column, the meaning is {@link #MIMETYPE} specific, 
+
+         used for
          * TEXT data type
          * <P> Type: TEXT </P>
          */
         public static final String DATA4 = "data4";
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * Generic data column, the meaning is {@link #MIMETYPE} specific, 
+
+         used for
          * TEXT data type
          * <P> Type: TEXT </P>
          */
         public static final String DATA5 = "data5";
-    }
-
+    }//主要是定义存储便签内容数据的
     public static final class TextNote implements DataColumns {
         /**
          * Mode to indicate the text in check list mode or not
@@ -250,12 +267,18 @@ public class Notes {
 
         public static final int MODE_CHECK_LIST = 1;
 
-        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note";
+        public static final String CONTENT_TYPE =
 
-        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note";
+                "vnd.android.cursor.dir/text_note";
 
-        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");
-    }
+        public static final String CONTENT_ITEM_TYPE =
+
+                "vnd.android.cursor.item/text_note";
+
+        public static final Uri CONTENT_URI = Uri.parse("content://" +
+
+                AUTHORITY + "/text_note");
+    }//文本内容的数据结构
 
     public static final class CallNote implements DataColumns {
         /**
@@ -270,10 +293,16 @@ public class Notes {
          */
         public static final String PHONE_NUMBER = DATA3;
 
-        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note";
+        public static final String CONTENT_TYPE =
 
-        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note";
+                "vnd.android.cursor.dir/call_note";
 
-        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");
-    }
-}
+        public static final String CONTENT_ITEM_TYPE =
+
+                "vnd.android.cursor.item/call_note";
+
+        public static final Uri CONTENT_URI = Uri.parse("content://" +
+
+                AUTHORITY + "/call_note");
+    }//电话内容的数据结构
+}

app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java

@@ -0,0 +1,349 @@
+package net.micode.notes.data;
+
+import android.content.ContentValues;//就是用于保存一些数据（string boolean byte double float int long short ...）信息，这些信息可以被数据库操作时使用。
+import android.content.Context;//加载和访问资源。（android中主要是这两个功能，但是这里具体不清楚）
+import android.database.sqlite.SQLiteDatabase;//主要提供了对应于添加、删除、更新、查询的操作方法： insert()、delete()、update()和query()。配合content.values
+import android.database.sqlite.SQLiteOpenHelper;//用来管理数据的创建和版本更新
+import android.util.Log;
+
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.DataConstants;
+import net.micode.notes.data.Notes.NoteColumns;
+//数据库操作，用SQLOpenhelper,对一些note和文件进行数据库的操作，比如删除文件后，将文件里的note也相应删除
+
+public class NotesDatabaseHelper extends SQLiteOpenHelper {
+    private static final String DB_NAME = "note.db";
+
+    private static final int DB_VERSION = 4;
+
+    public interface TABLE {    //接口，分成note和data，在后面的程序里分别使用过
+        public static final String NOTE = "note";
+
+        public static final String DATA = "data";
+    }
+
+    private static final String TAG = "NotesDatabaseHelper";
+
+    private static NotesDatabaseHelper mInstance;
+
+    private static final String CREATE_NOTE_TABLE_SQL =
+            "CREATE TABLE " + TABLE.NOTE + "(" +
+                    NoteColumns.ID + " INTEGER PRIMARY KEY," +
+                    NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+                    NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+                    NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
+                    NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
+                    NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
+                    NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
+                    ")";//数据库中需要存储的项目的名称，就相当于创建一个表格的表头的内容。
+
+    private static final String CREATE_DATA_TABLE_SQL =
+            "CREATE TABLE " + TABLE.DATA + "(" +
+                    DataColumns.ID + " INTEGER PRIMARY KEY," +
+                    DataColumns.MIME_TYPE + " TEXT NOT NULL," +
+                    DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+                    NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+                    DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
+                    DataColumns.DATA1 + " INTEGER," +
+                    DataColumns.DATA2 + " INTEGER," +
+                    DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
+                    DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
+                    DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
+                    ")";//和上面的功能一样，主要是存储的项目不同
+
+    private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
+            "CREATE INDEX IF NOT EXISTS note_id_index ON " +
+                    TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";//存储便签编号的一个数据表格
+
+    /**
+     * Increase folder's note count when move note to the folder
+     */
+    private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
+            "CREATE TRIGGER increase_folder_count_on_update "+
+                    " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
+                    " BEGIN " +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
+                    "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
+                    " END";//在文件夹中移入一个Note之后需要更改的数据的表格。
+
+    /**
+     * Decrease folder's note count when move note from folder
+     */
+    private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
+            "CREATE TRIGGER decrease_folder_count_on_update " +
+                    " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
+                    " BEGIN " +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
+                    "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
+                    "  AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
+                    " END";//在文件夹中移出一个Note之后需要更改的数据的表格。
+
+    /**
+     * Increase folder's note count when insert new note to the folder
+     */
+    private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
+            "CREATE TRIGGER increase_folder_count_on_insert " +
+                    " AFTER INSERT ON " + TABLE.NOTE +
+                    " BEGIN " +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
+                    "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
+                    " END";//在文件夹中插入一个Note之后需要更改的数据的表格。
+
+    /**
+     * Decrease folder's note count when delete note from the folder
+     */
+    private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
+            "CREATE TRIGGER decrease_folder_count_on_delete " +
+                    " AFTER DELETE ON " + TABLE.NOTE +
+                    " BEGIN " +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
+                    "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
+                    "  AND " + NoteColumns.NOTES_COUNT + ">0;" +
+                    " END";//在文件夹中删除一个Note之后需要更改的数据的表格。
+
+    /**
+     * Update note's content when insert data with type {@link DataConstants#NOTE}
+     */
+    private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
+            "CREATE TRIGGER update_note_content_on_insert " +
+                    " AFTER INSERT ON " + TABLE.DATA +
+                    " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+                    " BEGIN" +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
+                    "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
+                    " END";//在文件夹中对一个Note导入新的数据之后需要更改的数据的表格。
+
+    /**
+     * Update note's content when data with {@link DataConstants#NOTE} type has changed
+     */
+    private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
+            "CREATE TRIGGER update_note_content_on_update " +
+                    " AFTER UPDATE ON " + TABLE.DATA +
+                    " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+                    " BEGIN" +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
+                    "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
+                    " END";//Note数据被修改后需要更改的数据的表格。
+
+    /**
+     * Update note's content when data with {@link DataConstants#NOTE} type has deleted
+     */
+    private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
+            "CREATE TRIGGER update_note_content_on_delete " +
+                    " AFTER delete ON " + TABLE.DATA +
+                    " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+                    " BEGIN" +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.SNIPPET + "=''" +
+                    "  WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
+                    " END";//Note数据被删除后需要更改的数据的表格。
+
+    /**
+     * Delete datas belong to note which has been deleted
+     */
+    private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
+            "CREATE TRIGGER delete_data_on_delete " +
+                    " AFTER DELETE ON " + TABLE.NOTE +
+                    " BEGIN" +
+                    "  DELETE FROM " + TABLE.DATA +
+                    "   WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
+                    " END";//删除已删除的便签的数据后需要更改的数据的表格。
+
+    /**
+     * Delete notes belong to folder which has been deleted
+     */
+    private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
+            "CREATE TRIGGER folder_delete_notes_on_delete " +
+                    " AFTER DELETE ON " + TABLE.NOTE +
+                    " BEGIN" +
+                    "  DELETE FROM " + TABLE.NOTE +
+                    "   WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
+                    " END";//删除已删除的文件夹的便签后需要更改的数据的表格。
+
+    /**
+     * Move notes belong to folder which has been moved to trash folder
+     */
+    private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
+            "CREATE TRIGGER folder_move_notes_on_trash " +
+                    " AFTER UPDATE ON " + TABLE.NOTE +
+                    " WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
+                    " BEGIN" +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
+                    "  WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
+                    " END";//还原垃圾桶中便签后需要更改的数据的表格。
+
+    public NotesDatabaseHelper(Context context) {
+        super(context, DB_NAME, null, DB_VERSION);
+    }//构造函数，传入数据库的名称和版本
+
+    public void createNoteTable(SQLiteDatabase db) {
+        db.execSQL(CREATE_NOTE_TABLE_SQL);
+        reCreateNoteTableTriggers(db);
+        createSystemFolder(db);
+        Log.d(TAG, "note table has been created");
+    }//创建表格（用来存储标签属性）
+
+    private void reCreateNoteTableTriggers(SQLiteDatabase db) {
+        db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
+        db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update");
+        db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete");
+        db.execSQL("DROP TRIGGER IF EXISTS delete_data_on_delete");
+        db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_insert");
+        db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
+        db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
+
+        db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
+        db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
+        db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
+        db.execSQL(NOTE_DELETE_DATA_ON_DELETE_TRIGGER);
+        db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER);
+        db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER);
+        db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
+    }//execSQL是数据库操作的API，主要是更改行为的SQL语句。
+    //在这里主要是用来重新创建上述定义的表格用的，先删除原来有的数据库的触发器再重新创建新的数据库
+
+    private void createSystemFolder(SQLiteDatabase db) {
+        ContentValues values = new ContentValues();
+
+        /**
+         * call record foler for call notes
+         */
+        values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+
+        /**
+         * root folder which is default folder
+         */
+        values.clear();
+        values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+
+        /**
+         * temporary folder which is used for moving note
+         */
+        values.clear();
+        values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+
+        /**
+         * create trash folder
+         */
+        values.clear();
+        values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+    }//创建几个系统文件夹
+
+    public void createDataTable(SQLiteDatabase db) {
+        db.execSQL(CREATE_DATA_TABLE_SQL);
+        reCreateDataTableTriggers(db);
+        db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
+        Log.d(TAG, "data table has been created");
+    }//创建表格（用来存储标签内容）
+
+    private void reCreateDataTableTriggers(SQLiteDatabase db) {
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete");
+
+        db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER);
+        db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
+        db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
+    }//同上面的execSQL
+
+    static synchronized NotesDatabaseHelper getInstance(Context context) {
+        if (mInstance == null) {
+            mInstance = new NotesDatabaseHelper(context);
+        }
+        return mInstance;
+    }//上网查是为解决同一时刻只能有一个线程执行.
+    //在写程序库代码时，有时有一个类需要被所有的其它类使用，
+    //但又要求这个类只能被实例化一次，是个服务类，定义一次，其它类使用同一个这个类的实例
+
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+        createNoteTable(db);
+        createDataTable(db);
+    }//实现两个表格（上面创建的两个表格）
+
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        boolean reCreateTriggers = false;
+        boolean skipV2 = false;
+
+        if (oldVersion == 1) {
+            upgradeToV2(db);
+            skipV2 = true; // this upgrade including the upgrade from v2 to v3
+            oldVersion++;
+        }
+
+        if (oldVersion == 2 && !skipV2) {
+            upgradeToV3(db);
+            reCreateTriggers = true;
+            oldVersion++;
+        }
+
+        if (oldVersion == 3) {
+            upgradeToV4(db);
+            oldVersion++;
+        }
+
+        if (reCreateTriggers) {
+            reCreateNoteTableTriggers(db);
+            reCreateDataTableTriggers(db);
+        }
+
+        if (oldVersion != newVersion) {
+            throw new IllegalStateException("Upgrade notes database to version " + newVersion
+                    + "fails");
+        }
+    }//数据库版本的更新（数据库内容的更改）
+
+    private void upgradeToV2(SQLiteDatabase db) {
+        db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
+        db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
+        createNoteTable(db);
+        createDataTable(db);
+    }//更新到V2版本
+
+    private void upgradeToV3(SQLiteDatabase db) {
+        // drop unused triggers
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert");
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete");
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update");
+        // add a column for gtask id
+        db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
+                + " TEXT NOT NULL DEFAULT ''");
+        // add a trash system folder
+        ContentValues values = new ContentValues();
+        values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+    }//更新到V3版本
+
+    private void upgradeToV4(SQLiteDatabase db) {
+        db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
+                + " INTEGER NOT NULL DEFAULT 0");
+    }//更新到V4版本,但是不知道V2、V3、V4是什么意思
+}

app/src/main/java/net/micode/notes/data/NotesProvider.java

@@ -1,22 +1,5 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.data;
 
-
 import android.app.SearchManager;
 import android.content.ContentProvider;
 import android.content.ContentUris;
@@ -33,9 +16,15 @@ import net.micode.notes.R;
 import net.micode.notes.data.Notes.DataColumns;
 import net.micode.notes.data.Notes.NoteColumns;
 import net.micode.notes.data.NotesDatabaseHelper.TABLE;
-
-
+//为存储和获取数据提供接口。可以在不同的应用程序之间共享数据
+//ContentProvider提供的方法
+//query：查询
+//insert：插入
+//update：更新
+//delete：删除
+//getType：得到数据类型
 public class NotesProvider extends ContentProvider {
+    // UriMatcher用于匹配Uri
     private static final UriMatcher mMatcher;
 
     private NotesDatabaseHelper mHelper;
@@ -51,7 +40,9 @@ public class NotesProvider extends ContentProvider {
     private static final int URI_SEARCH_SUGGEST  = 6;
 
     static {
+        // 创建UriMatcher时，调用UriMatcher(UriMatcher.NO_MATCH)表示不匹配任何路径的返回码
         mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
+        // 把需要匹配Uri路径全部给注册上
         mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE);
         mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM);
         mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA);
@@ -65,33 +56,40 @@ public class NotesProvider extends ContentProvider {
      * x'0A' represents the '\n' character in sqlite. For title and content in the search result,
      * we will trim '\n' and white space in order to show more information.
      */
+    // 声明 NOTES_SEARCH_PROJECTION
     private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + ","
-        + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + ","
-        + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + ","
-        + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + ","
-        + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + ","
-        + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + ","
-        + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA;
-
+            + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + ","
+            + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + ","
+            + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + ","
+            + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + ","
+            + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + ","
+            + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA;
+    // 声明NOTES_SNIPPET_SEARCH_QUERY
     private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION
-        + " FROM " + TABLE.NOTE
-        + " WHERE " + NoteColumns.SNIPPET + " LIKE ?"
-        + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
-        + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
+            + " FROM " + TABLE.NOTE
+            + " WHERE " + NoteColumns.SNIPPET + " LIKE ?"
+            + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
+            + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
 
     @Override
+    // Context只有在onCreate()中才被初始化
+    // 对mHelper进行实例化
     public boolean onCreate() {
         mHelper = NotesDatabaseHelper.getInstance(getContext());
         return true;
     }
 
     @Override
+    // 查询uri在数据库中对应的位置
     public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
-            String sortOrder) {
+                        String sortOrder) {
         Cursor c = null;
+        // 获取可读数据库
         SQLiteDatabase db = mHelper.getReadableDatabase();
         String id = null;
+        // 匹配查找uri
         switch (mMatcher.match(uri)) {
+            // 对于不同的匹配值，在数据库中查找相应的条目
             case URI_NOTE:
                 c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
                         sortOrder);
@@ -113,6 +111,7 @@ public class NotesProvider extends ContentProvider {
             case URI_SEARCH:
             case URI_SEARCH_SUGGEST:
                 if (sortOrder != null || projection != null) {
+                    // 不合法的参数异常
                     throw new IllegalArgumentException(
                             "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
                 }
@@ -120,6 +119,8 @@ public class NotesProvider extends ContentProvider {
                 String searchString = null;
                 if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) {
                     if (uri.getPathSegments().size() > 1) {
+                        // getPathSegments()方法得到一个String的List，
+                        // 在uri.getPathSegments().get(1)为第2个元素
                         searchString = uri.getPathSegments().get(1);
                     }
                 } else {
@@ -139,6 +140,7 @@ public class NotesProvider extends ContentProvider {
                 }
                 break;
             default:
+                // 抛出异常
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
         if (c != null) {
@@ -148,13 +150,17 @@ public class NotesProvider extends ContentProvider {
     }
 
     @Override
+    // 插入一个uri
     public Uri insert(Uri uri, ContentValues values) {
+        // 获得可写的数据库
         SQLiteDatabase db = mHelper.getWritableDatabase();
         long dataId = 0, noteId = 0, insertedId = 0;
         switch (mMatcher.match(uri)) {
+            // 新增一个条目
             case URI_NOTE:
                 insertedId = noteId = db.insert(TABLE.NOTE, null, values);
                 break;
+            // 如果存在，查找NOTE_ID
             case URI_DATA:
                 if (values.containsKey(DataColumns.NOTE_ID)) {
                     noteId = values.getAsLong(DataColumns.NOTE_ID);
@@ -167,6 +173,7 @@ public class NotesProvider extends ContentProvider {
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
         // Notify the note uri
+        // notifyChange获得一个ContextResolver对象并且更新里面的内容
         if (noteId > 0) {
             getContext().getContentResolver().notifyChange(
                     ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
@@ -178,13 +185,17 @@ public class NotesProvider extends ContentProvider {
                     ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
         }
 
+        // 返回插入的uri的路径
         return ContentUris.withAppendedId(uri, insertedId);
     }
 
     @Override
+    // 删除一个uri
     public int delete(Uri uri, String selection, String[] selectionArgs) {
+        //Uri代表要操作的数据，Android上可用的每种资源 -包括 图像、视频片段、音频资源等都可以用Uri来表示。
         int count = 0;
         String id = null;
+        // 获得可写的数据库
         SQLiteDatabase db = mHelper.getWritableDatabase();
         boolean deleteData = false;
         switch (mMatcher.match(uri)) {
@@ -228,6 +239,7 @@ public class NotesProvider extends ContentProvider {
     }
 
     @Override
+    // 更新一个uri
     public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
         int count = 0;
         String id = null;
@@ -267,10 +279,12 @@ public class NotesProvider extends ContentProvider {
         return count;
     }
 
+    // 将字符串解析成规定格式
     private String parseSelection(String selection) {
         return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
     }
 
+    //增加一个noteVersion
     private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
         StringBuilder sql = new StringBuilder(120);
         sql.append("UPDATE ");
@@ -293,6 +307,7 @@ public class NotesProvider extends ContentProvider {
             sql.append(selectString);
         }
 
+        // execSQL()方法可以执行insert、delete、update和CREATE TABLE之类有更改行为的SQL语句
         mHelper.getWritableDatabase().execSQL(sql.toString());
     }
 
@@ -302,4 +317,4 @@ public class NotesProvider extends ContentProvider {
         return null;
     }
 
-}
+}

app/src/main/java/net/micode/notes/gtask/remote/GTaskASyncTask.java

@@ -64,23 +64,42 @@ public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
     }
 
     private void showNotification(int tickerId, String content) {
-        Notification notification = new Notification(R.drawable.notification, mContext
-                .getString(tickerId), System.currentTimeMillis());
-        notification.defaults = Notification.DEFAULT_LIGHTS;
-        notification.flags = Notification.FLAG_AUTO_CANCEL;
         PendingIntent pendingIntent;
         if (tickerId != R.string.ticker_success) {
             pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
-                    NotesPreferenceActivity.class), 0);
-
+                    NotesPreferenceActivity.class), PendingIntent.FLAG_IMMUTABLE);
         } else {
             pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
-                    NotesListActivity.class), 0);
+                    NotesListActivity.class), PendingIntent.FLAG_IMMUTABLE);
         }
-        notification.setLatestEventInfo(mContext, mContext.getString(R.string.app_name), content,
-                pendingIntent);
+        Notification.Builder builder = new Notification.Builder(mContext)
+                .setAutoCancel(true)
+                .setContentTitle(mContext.getString(R.string.app_name))
+                .setContentText(content)
+                .setContentIntent(pendingIntent)
+                .setWhen(System.currentTimeMillis())
+                .setOngoing(true);
+        Notification notification=builder.getNotification();
         mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);
     }
+//    private void showNotification(int tickerId, String content) {
+//        Notification notification = new Notification(R.drawable.notification, mContext
+//                .getString(tickerId), System.currentTimeMillis());
+//        notification.defaults = Notification.DEFAULT_LIGHTS;
+//        notification.flags = Notification.FLAG_AUTO_CANCEL;
+//        PendingIntent pendingIntent;
+//        if (tickerId != R.string.ticker_success) {
+//            pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
+//                    NotesPreferenceActivity.class), 0);
+//
+//        } else {
+//            pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
+//                    NotesListActivity.class), 0);
+//        }
+//        notification.setLatestEventInfo(mContext, mContext.getString(R.string.app_name), content,
+//                pendingIntent);
+//        mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);
+//    }
 
     @Override
     protected Integer doInBackground(Void... unused) {

app/src/main/java/net/micode/notes/model/Note.java

@@ -15,15 +15,15 @@
  */
 
 package net.micode.notes.model;
-import android.content.ContentProviderOperation;
-import android.content.ContentProviderResult;
-import android.content.ContentUris;
-import android.content.ContentValues;
-import android.content.Context;
-import android.content.OperationApplicationException;
-import android.net.Uri;
-import android.os.RemoteException;
-import android.util.Log;
+import android.content.ContentProviderOperation;        //批量的更新、插入、删除数据。
+import android.content.ContentProviderResult;           //操作的结果
+import android.content.ContentUris;                     //用于添加和获取Uri后面的ID
+import android.content.ContentValues;                   //一种用来存储基本数据类型数据的存储机制
+import android.content.Context;                         //需要用该类来弄清楚调用者的实例
+import android.content.OperationApplicationException;   //操作应用程序容错
+import android.net.Uri;                                 //表示待操作的数据
+import android.os.RemoteException;                      //远程容错
+import android.util.Log;                                //输出日志，比如说出错、警告等
 
 import net.micode.notes.data.Notes;
 import net.micode.notes.data.Notes.CallNote;

app/src/main/java/net/micode/notes/model/WorkingNote.java

@@ -38,7 +38,8 @@ public class WorkingNote {
     // Note Id
     private long mNoteId;
     // Note content
-    private String mContent;
+//    private String mContent;
+    public String mContent;
     // Note mode
     private int mMode;
 

app/src/main/java/net/micode/notes/ui/NoteEditActivity.java

@@ -14,6 +14,66 @@
  * limitations under the License.
  */
 
+//package net.micode.notes.ui;
+//
+//import android.app.Activity;
+//import android.app.AlarmManager;
+//import android.app.AlertDialog;
+//import android.app.PendingIntent;
+//import android.app.SearchManager;
+//import android.appwidget.AppWidgetManager;
+//import android.content.ContentResolver; // 新添加
+//import android.content.ContentUris;
+//import android.content.Context;
+//import android.content.DialogInterface;
+//import android.content.Intent;
+//import android.content.SharedPreferences;
+//import android.graphics.Paint;
+//import android.os.Bundle;
+//import android.preference.PreferenceManager;
+//import android.text.Spannable;
+//import android.text.SpannableString;
+//import android.text.TextUtils;
+//import android.text.format.DateUtils;
+//import android.text.style.BackgroundColorSpan;
+//import android.util.Log;
+//import android.view.LayoutInflater;
+//import android.view.Menu;
+//import android.view.MenuItem;
+//import android.view.MotionEvent;
+//import android.view.View;
+//import android.view.View.OnClickListener;
+//import android.view.WindowManager;
+//import android.widget.CheckBox;
+//import android.widget.CompoundButton;
+//import android.widget.CompoundButton.OnCheckedChangeListener;
+//import android.widget.EditText;
+//import android.widget.ImageView;
+//import android.widget.LinearLayout;
+//import android.widget.TextView;
+//import android.widget.Toast;
+//
+//import net.micode.notes.R;
+//import net.micode.notes.data.Notes;
+//import net.micode.notes.data.Notes.TextNote;
+//import net.micode.notes.model.WorkingNote;
+//import net.micode.notes.model.WorkingNote.NoteSettingChangedListener;
+//import net.micode.notes.tool.DataUtils;
+//import net.micode.notes.tool.ResourceParser;
+//import net.micode.notes.tool.ResourceParser.TextAppearanceResources;
+//import net.micode.notes.ui.DateTimePickerDialog.OnDateTimeSetListener;
+//import net.micode.notes.ui.NoteEditText.OnTextViewChangeListener;
+//import net.micode.notes.widget.NoteWidgetProvider_2x;
+//import net.micode.notes.widget.NoteWidgetProvider_4x;
+//
+//
+//import java.io.FileNotFoundException; // 新添加
+//import java.util.HashMap;
+//import java.util.HashSet;
+//import java.util.Map;
+//import java.util.regex.Matcher;
+//import java.util.regex.Pattern;
+
 package net.micode.notes.ui;
 
 import android.app.Activity;
@@ -22,19 +82,34 @@ import android.app.AlertDialog;
 import android.app.PendingIntent;
 import android.app.SearchManager;
 import android.appwidget.AppWidgetManager;
+import android.content.ContentResolver; // 新添加
 import android.content.ContentUris;
+import android.content.ContentValues;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.database.Cursor;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Matrix;
 import android.graphics.Paint;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
+import android.os.Environment;
 import android.preference.PreferenceManager;
+import android.provider.DocumentsContract;
+import android.provider.MediaStore;
+import android.text.Editable;
 import android.text.Spannable;
 import android.text.SpannableString;
 import android.text.TextUtils;
 import android.text.format.DateUtils;
 import android.text.style.BackgroundColorSpan;
+import android.text.style.ImageSpan;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -43,10 +118,12 @@ import android.view.MotionEvent;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.WindowManager;
+import android.widget.Button;
 import android.widget.CheckBox;
 import android.widget.CompoundButton;
 import android.widget.CompoundButton.OnCheckedChangeListener;
 import android.widget.EditText;
+import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
@@ -65,6 +142,7 @@ import net.micode.notes.ui.NoteEditText.OnTextViewChangeListener;
 import net.micode.notes.widget.NoteWidgetProvider_2x;
 import net.micode.notes.widget.NoteWidgetProvider_4x;
 
+import java.io.FileNotFoundException; // 新添加
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
@@ -74,6 +152,8 @@ import java.util.regex.Pattern;
 
 public class NoteEditActivity extends Activity implements OnClickListener,
         NoteSettingChangedListener, OnTextViewChangeListener {
+    //该类主要是针对标签的编辑
+    //继承了系统内部许多和监听有关的类
     private class HeadViewHolder {
         public TextView tvModified;
 
@@ -84,6 +164,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         public ImageView ibSetBgColor;
     }
 
+    //使用Map实现数据存储
     private static final Map<Integer, Integer> sBgSelectorBtnsMap = new HashMap<Integer, Integer>();
     static {
         sBgSelectorBtnsMap.put(R.id.iv_bg_yellow, ResourceParser.YELLOW);
@@ -122,20 +203,22 @@ public class NoteEditActivity extends Activity implements OnClickListener,
 
     private HeadViewHolder mNoteHeaderHolder;
 
-    private View mHeadViewPanel;
+    private View mHeadViewPanel;//私有化一个界面操作mHeadViewPanel，对表头的操作
+
+    private View mNoteBgColorSelector;//私有化一个界面操作mNoteBgColorSelector，对背景颜色的操作
 
-    private View mNoteBgColorSelector;
+    private View mFontSizeSelector;//私有化一个界面操作mFontSizeSelector，对标签字体的操作
 
-    private View mFontSizeSelector;
+    private EditText mNoteEditor;//声明编辑控件，对文本操作
 
-    private EditText mNoteEditor;
+    private View mNoteEditorPanel;//私有化一个界面操作mNoteEditorPanel，文本编辑的控制板
 
-    private View mNoteEditorPanel;
+    private WorkingNote mWorkingNote;//对模板WorkingNote的初始化
 
-    private WorkingNote mWorkingNote;
+    private SharedPreferences mSharedPrefs;//私有化SharedPreferences的数据存储方式
+    //它的本质是基于XML文件存储key-value键值对数据
 
-    private SharedPreferences mSharedPrefs;
-    private int mFontSizeId;
+    private int mFontSizeId;//用于操作字体的大小
 
     private static final String PREFERENCE_FONT_SIZE = "pref_font_size";
 
@@ -146,19 +229,40 @@ public class NoteEditActivity extends Activity implements OnClickListener,
 
     private LinearLayout mEditTextList;
 
+    //线性布局
     private String mUserQuery;
     private Pattern mPattern;
 
+    private final int PHOTO_REQUEST = 1;//请求码
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         this.setContentView(R.layout.note_edit);
-
+        //对数据库的访问操作
         if (savedInstanceState == null && !initActivityState(getIntent())) {
             finish();
             return;
         }
         initResources();
+
+        //根据id获取添加图片按钮
+        final ImageButton add_img_btn = (ImageButton) findViewById(R.id.add_img_btn);
+        //为点击图片按钮设置监听器
+        add_img_btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Log.d(TAG, "onClick: click add image button");
+                //ACTION_GET_CONTENT: 允许用户选择特殊种类的数据，并返回（特殊种类的数据：照一张相片或录一段音）
+                Intent loadImage = new Intent(Intent.ACTION_GET_CONTENT);
+                //Category属性用于指定当前动作（Action）被执行的环境.
+                //CATEGORY_OPENABLE; 用来指示一个ACTION_GET_CONTENT的intent -- 添加类别，用于指示用户选择可打开的文件。
+                loadImage.addCategory(Intent.CATEGORY_OPENABLE);
+                loadImage.setType("image/*"); // 设置Intent的类型为图片
+                startActivityForResult(loadImage, PHOTO_REQUEST); // 启动一个新的Activity来处理用户选择的图片，当操作完成时返回结果。
+            }
+        });
+
     }
 
     /**
@@ -176,7 +280,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
                 return;
             }
             Log.d(TAG, "Restoring from killed activity");
-        }
+        }//为防止内存不足时程序的终止，在这里有一个保存现场的函数
     }
 
     private boolean initActivityState(Intent intent) {
@@ -263,12 +367,13 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     }
 
     @Override
-    protected void onResume() {
+    protected void onResume() {//能获得用户焦点：可以操作
         super.onResume();
-        initNoteScreen();
+        initNoteScreen();//初始化便签屏幕
     }
 
     private void initNoteScreen() {
+        // 对界面初始化
         mNoteEditor.setTextAppearance(this, TextAppearanceResources
                 .getTexAppearanceResource(mFontSizeId));
         if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {
@@ -293,25 +398,71 @@ public class NoteEditActivity extends Activity implements OnClickListener,
          * is not ready
          */
         showAlertHeader();
+        //将有图片路径的位置转换为图片
+        convertToImage();
     }
 
+    // 设置闹钟的显示
     private void showAlertHeader() {
         if (mWorkingNote.hasClockAlert()) {
             long time = System.currentTimeMillis();
             if (time > mWorkingNote.getAlertDate()) {
                 mNoteHeaderHolder.tvAlertDate.setText(R.string.note_alert_expired);
-            } else {
+            }//如果系统时间大于了闹钟设置的时间，那么闹钟失效
+            else {
                 mNoteHeaderHolder.tvAlertDate.setText(DateUtils.getRelativeTimeSpanString(
                         mWorkingNote.getAlertDate(), time, DateUtils.MINUTE_IN_MILLIS));
             }
             mNoteHeaderHolder.tvAlertDate.setVisibility(View.VISIBLE);
             mNoteHeaderHolder.ivAlertIcon.setVisibility(View.VISIBLE);
+            //显示闹钟开启的图标
         } else {
             mNoteHeaderHolder.tvAlertDate.setVisibility(View.GONE);
             mNoteHeaderHolder.ivAlertIcon.setVisibility(View.GONE);
         };
     }
 
+    //路径字符串格式 转换为 图片image格式
+    private void convertToImage() {
+        NoteEditText noteEditText = (NoteEditText) findViewById(R.id.note_edit_view); //获取当前的edit
+        Editable editable = noteEditText.getText();//1.获取可编辑的文本
+        String noteText = editable.toString(); //2.将文本内容转换为字符串
+        int length = editable.length(); //内容的长度
+        //3.截取img片段 [local]+uri+[local]，提取uri
+        for(int i = 0; i < length; i++) {
+            for(int j = i; j < length; j++) {
+                String img_fragment = noteText.substring(i, j+1); //img_fragment：关于图片路径的片段
+                if(img_fragment.length() > 15 && img_fragment.endsWith("[/local]") && img_fragment.startsWith("[local]")){
+                    int limit = 7;  //[local]为7个字符
+                    //[local][/local]共15个字符，剩下的为真正的path长度
+                    int len = img_fragment.length()-15;
+                    //从[local]之后的len个字符就是path
+                    String path = img_fragment.substring(limit,limit+len);//获取到了图片路径
+                    Bitmap bitmap = null;
+                    Log.d(TAG, "图片的路径是："+path);
+                    try {
+                        bitmap = BitmapFactory.decodeFile(path);//将图片路径解码为图片格式
+                    } catch (Exception e) {
+                        e.printStackTrace();
+                    }
+                    if(bitmap!=null){  //若图片存在
+                        Log.d(TAG, "图片不为null");
+                        ImageSpan imageSpan = new ImageSpan(NoteEditActivity.this, bitmap);
+                        //4.创建一个SpannableString对象，以便插入用ImageSpan对象封装的图像
+                        String ss = "[local]" + path + "[/local]";
+                        SpannableString spannableString = new SpannableString(ss);
+                        //5.将指定的标记对象附加到文本的开始...结束范围
+                        spannableString.setSpan(imageSpan, 0, ss.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
+                        Log.d(TAG, "Create spannable string success!");
+                        Editable edit_text = noteEditText.getEditableText();
+                        edit_text.delete(i,i+len+15); //6.删掉图片路径的文字
+                        edit_text.insert(i, spannableString); //7.在路径的起始位置插入图片
+                    }
+                }
+            }
+        }
+    }
+
     @Override
     protected void onNewIntent(Intent intent) {
         super.onNewIntent(intent);
@@ -870,4 +1021,121 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     private void showToast(int resId, int duration) {
         Toast.makeText(this, resId, duration).show();
     }
+
+    @Override
+    //重写onActivityResult()来处理返回的数据
+    // 这段代码的主要功能是处理用户选择的图片，将图片插入到NoteEditText控件的光标位置，并将修改后的内容更新到数据库中。
+    // 它包括获取图片路径、解码图片、创建ImageSpan对象、将图片插入到编辑文本中以及更新数据库的操作。
+    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
+        super.onActivityResult(requestCode, resultCode, intent);
+        ContentResolver resolver = getContentResolver();
+        switch (requestCode) {
+            case PHOTO_REQUEST:
+                Uri originalUri = intent.getData(); //1.获得图片的真实路径
+                Bitmap bitmap = null;
+                try {
+                    bitmap = BitmapFactory.decodeStream(resolver.openInputStream(originalUri));//2.解码图片
+                } catch (FileNotFoundException e) {
+                    Log.d(TAG, "onActivityResult: get file_exception");
+                    e.printStackTrace();
+                }
+                // 如果Bitmap对象不为空，创建ImageSpan对象
+                if(bitmap != null){
+                    //3.根据Bitmap对象创建ImageSpan对象
+                    Log.d(TAG, "onActivityResult: bitmap is not null");
+                    ImageSpan imageSpan = new ImageSpan(NoteEditActivity.this, bitmap);
+                    String path = getPath(this,originalUri);
+                    //4.使用[local][/local]将path括起来，用于之后方便识别图片路径在note中的位置
+                    String img_fragment= "[local]" + path + "[/local]";
+                    //创建一个SpannableString对象，以便插入用ImageSpan对象封装的图像
+                    SpannableString spannableString = new SpannableString(img_fragment);
+                    spannableString.setSpan(imageSpan, 0, img_fragment.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
+                    //5.将选择的图片追加到EditText中光标所在位置
+                    NoteEditText e = (NoteEditText) findViewById(R.id.note_edit_view);
+                    int index = e.getSelectionStart(); //获取光标所在位置
+                    Log.d(TAG, "Index是: " + index);
+                    Editable edit_text = e.getEditableText();
+                    edit_text.insert(index, spannableString); //将图片插入到光标所在位置
+
+                    // 更新数据库
+                    mWorkingNote.mContent = e.getText().toString();
+                    //6.把改动提交到数据库中,两个数据库表都要改的
+                    ContentResolver contentResolver = getContentResolver();
+                    ContentValues contentValues = new ContentValues();
+                    final long id = mWorkingNote.getNoteId();
+                    contentValues.put("snippet",mWorkingNote.mContent);
+                    contentResolver.update(Uri.parse("content://micode_notes/note"), contentValues,"_id=?",new String[]{""+id});
+                    ContentValues contentValues1 = new ContentValues();
+                    contentValues1.put("content",mWorkingNote.mContent);
+                    contentResolver.update(Uri.parse("content://micode_notes/data"), contentValues1,"mime_type=? and note_id=?", new String[]{"vnd.android.cursor.item/text_note",""+id});
+
+                }else{
+                    Toast.makeText(NoteEditActivity.this, "获取图片失败", Toast.LENGTH_SHORT).show();
+                }
+                break;
+            default:
+                break;
+        }
+    }
+
+    //获取文件的real path
+    //这段代码通过处理不同类型的Uri，如文档类型、媒体类型和文件类型，来获取实际文件路径。
+    // 通过自定义的getDataColumn方法，它从内容提供者中查询并获取文件路径
+    public String getPath(final Context context, final Uri uri) {
+
+        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
+
+        // DocumentProvider
+        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
+            if (isMediaDocument(uri)) {
+                final String docId = DocumentsContract.getDocumentId(uri);
+                final String[] split = docId.split(":");
+                final String type = split[0];
+
+                Uri contentUri = null;
+                if ("image".equals(type)) {
+                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
+                }
+
+                final String selection = "_id=?";
+                final String[] selectionArgs = new String[]{split[1]};
+
+                return getDataColumn(context, contentUri, selection, selectionArgs);
+            }
+        }
+        // Media
+        else if ("content".equalsIgnoreCase(uri.getScheme())) {
+            return getDataColumn(context, uri, null, null);
+        }
+        // File
+        else if ("file".equalsIgnoreCase(uri.getScheme())) {
+            return uri.getPath();
+        }
+        return null;
+    }
+
+
+    //获取数据列_获取此 Uri 的数据列的值。对MediaStore Uris 和其他基于文件的 ContentProvider。
+    public String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
+
+        Cursor cursor = null;
+        final String column = "_data";
+        final String[] projection = {column};
+
+        try {
+            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
+            if (cursor != null && cursor.moveToFirst()) {
+                final int column_index = cursor.getColumnIndexOrThrow(column);
+                return cursor.getString(column_index);
+            }
+        } finally {
+            if (cursor != null)
+                cursor.close();
+        }
+        return null;
+    }
+    //是否为媒体文件
+    public boolean isMediaDocument(Uri uri) {
+        return "com.android.providers.media.documents".equals(uri.getAuthority());
+    }
 }