update AlarmAlertActivity.java notes

Notes-master2/.idea/.gitignore

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

Notes-master2/.idea/compiler.xml

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

Notes-master2/.idea/gradle.xml

@@ -1,21 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="GradleMigrationSettings" migrationVersion="1" />
-  <component name="GradleSettings">
-    <option name="linkedExternalProjectsSettings">
-      <GradleProjectSettings>
-        <option name="testRunner" value="GRADLE" />
-        <option name="distributionType" value="DEFAULT_WRAPPED" />
-        <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleHome" value="$PROJECT_DIR$/../../tools/gradle/gradle-7.4.1" />
-        <option name="gradleJvm" value="17" />
-        <option name="modules">
-          <set>
-            <option value="$PROJECT_DIR$" />
-            <option value="$PROJECT_DIR$/app" />
-          </set>
-        </option>
-      </GradleProjectSettings>
-    </option>
-  </component>
-</project>

Notes-master2/.idea/jarRepositories.xml

@@ -1,25 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RemoteRepositoriesConfiguration">
-    <remote-repository>
-      <option name="id" value="central" />
-      <option name="name" value="Maven Central repository" />
-      <option name="url" value="https://repo1.maven.org/maven2" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="jboss.community" />
-      <option name="name" value="JBoss Community repository" />
-      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="BintrayJCenter" />
-      <option name="name" value="BintrayJCenter" />
-      <option name="url" value="https://jcenter.bintray.com/" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="Google" />
-      <option name="name" value="Google" />
-      <option name="url" value="https://dl.google.com/dl/android/maven2/" />
-    </remote-repository>
-  </component>
-</project>

Notes-master2/.idea/misc.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_17_PREVIEW" project-jdk-name="17" project-jdk-type="JavaSDK" />
-  <component name="ProjectType">
-    <option name="id" value="Android" />
-  </component>
-</project>

Notes-master2/app/build/intermediates/incremental/packageDebug/tmp/debug/dex-renamer-state.txt

@@ -1,4 +1,4 @@
-#Fri Apr 14 09:05:03 CST 2023
+#Wed Apr 19 22:32:26 CST 2023
 base.0=D\:\\SoftEngineering\\MiNotesPlusDemo\\Notes-master2\\app\\build\\intermediates\\dex\\debug\\mergeDexDebug\\classes.dex
 renamed.0=classes.dex
 path.0=classes.dex

Notes-master2/app/src/main/java/net/micode/notes/ui/AlarmAlertActivity.java

@@ -39,13 +39,19 @@ import net.micode.notes.tool.DataUtils;
 
 import java.io.IOException;
 
-
+/**
+ * 报警提示活动
+ */
 public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
-    private long mNoteId;
-    private String mSnippet;
+    private long mNoteId;//文本在数据库中的id号
+    private String mSnippet;//闹钟提示时显示的文字
     private static final int SNIPPET_PREW_MAX_LEN = 60;
     MediaPlayer mPlayer;
 
+    /**
+     * 能从onCreate的参数savedInsanceState中获得状态数据
+     * @param savedInstanceState saveInstanceState方法是用来保存Activity的状态的
+     */
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -56,19 +62,27 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
 
         if (!isScreenOn()) {
             win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
+                    //保持窗体显示
                     | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
+                    //将窗体显示
                     | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
+                    //允许窗体显示时锁屏
                     | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);
-        }
+        }//在手机锁屏后如果到了闹钟提示时间，显示屏幕
 
         Intent intent = getIntent();
 
         try {
-            mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
+            //将Long.valueOf升级为Long.parseLong
+            //在字符串转换为long类型的数据时，如果只需要转换为基础类型，用Long.parseLong性能较好；如果需要获得Long对象，并且数值在-128到127之间，Long.valueOf性能比较好
+            mNoteId = Long.parseLong(intent.getData().getPathSegments().get(1));
             mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId);
+            //根据ID从数据库中获取标签的内容；
+            //getContentResolver() 是实现数据共享，实例存储。
             mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0,
                     SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info)
                     : mSnippet;
+            //判断标签片段是否达到符合长度
         } catch (IllegalArgumentException e) {
             e.printStackTrace();
             return;
@@ -77,19 +91,25 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
         mPlayer = new MediaPlayer();
         if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
             showActionDialog();
+            //弹出对话框
             playAlarmSound();
+            //闹钟提示音激发
         } else {
             finish();
+            //完成闹钟动作
         }
     }
 
     private boolean isScreenOn() {
+        //判断屏幕是否锁屏，调用系统函数判断，最后返回值是布尔类型
         PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
         return pm.isScreenOn();
     }
 
     private void playAlarmSound() {
+        //闹钟提示音激发
         Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
+        //调用系统的铃声管理URI，得到闹钟提示音
 
         int silentModeStreams = Settings.System.getInt(getContentResolver(),
                 Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0);
@@ -100,9 +120,13 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
             mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);
         }
         try {
+            //得到播放资源
             mPlayer.setDataSource(this, url);
+            //播放准备
             mPlayer.prepare();
+            //设置是否循环播放
             mPlayer.setLooping(true);
+            //播放开始
             mPlayer.start();
         } catch (IllegalArgumentException e) {
             // TODO Auto-generated catch block
@@ -120,9 +144,13 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
     }
 
     private void showActionDialog() {
+        //AlertDialog的构造方法是Protected，所以不能直接通过new一个AlertDialog来创建出一个AlertDialog
         AlertDialog.Builder dialog = new AlertDialog.Builder(this);
+        //为对话框设置标题
         dialog.setTitle(R.string.app_name);
+        //设置消息
         dialog.setMessage(mSnippet);
+        //设置活动按钮
         dialog.setPositiveButton(R.string.notealert_ok, this);
         if (isScreenOn()) {
             dialog.setNegativeButton(R.string.notealert_enter, this);
@@ -130,6 +158,11 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
         dialog.show().setOnDismissListener(this);
     }
 
+    /**
+     * 点击按钮
+     * @param dialog 对话框
+     * @param which 按钮选择
+     */
     public void onClick(DialogInterface dialog, int which) {
         switch (which) {
             case DialogInterface.BUTTON_NEGATIVE:
@@ -143,11 +176,18 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
         }
     }
 
+    /**
+     * 停止闹钟
+     * @param dialog 对话
+     */
     public void onDismiss(DialogInterface dialog) {
         stopAlarmSound();
         finish();
     }
 
+    /**
+     * 停止闹钟声音
+     */
     private void stopAlarmSound() {
         if (mPlayer != null) {
             mPlayer.stop();