创建数据库实体类：Province、City、County；使用litepal操作数据库，目前项目有关litepal的部分都爆红，原因应该包还未引进；

.idea/misc.xml

@@ -1,5 +1,12 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="DesignSurface">
+    <option name="filePathToZoomLevelMap">
+      <map>
+        <entry key="..\:/Android/FlamekingWeather/app/src/main/res/layout/layout.xml" value="0.2390625" />
+      </map>
+    </option>
+  </component>
   <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="Android Studio default JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>

app/build.gradle

@@ -28,7 +28,16 @@ android {
 }
 
 dependencies {
-
+    implementation fileTree(dir: 'libs', includes: ['*.jar'])
+    testImplementation 'junit:junit:4.12'
+    // litepal用于对数据库操作，类似JPA
+    implementation 'org.litepal.guolindev:core:3.2.3'
+    // okhttp用于网络请求
+    implementation 'com.squareup.okhttp3:okhttp:3.4.1'
+    // gson用于解析json数据
+    implementation 'com.google.code.gson:gson:2.7'
+    // glide用于加载和显示图片
+    implementation 'com.github.bumptech.glide:glide:3.7.0'
     implementation 'androidx.appcompat:appcompat:1.3.0'
     implementation 'com.google.android.material:material:1.4.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'

app/src/main/AndroidManifest.xml

@@ -3,6 +3,7 @@
     package="com.casflawed.flameking.weather">
 
     <application
+        android:name="org.litepal.LitePalApplication"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"

app/src/main/assets/litepal.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<litepal>
+    <dbname value="flameking_weather"/>
+    <version value="1"/>
+    <list>
+        <mapping class="com.casflawed.flameking.weather.db.Province"/>
+        <mapping class="com.casflawed.flameking.weather.db.City"/>
+        <mapping class="com.casflawed.flameking.weather.db.County"/>
+    </list>
+</litepal>

app/src/main/java/com/casflawed/flameking/weather/db/City.java

@@ -0,0 +1,50 @@
+package com.casflawed.flameking.weather.db;
+
+public class City extends LitePalSupport{
+    private Integer id;
+    private String cityName;
+    private Integer cityCode;
+    private Integer provinceId;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getCityName() {
+        return cityName;
+    }
+
+    public void setCityName(String cityName) {
+        this.cityName = cityName;
+    }
+
+    public Integer getCityCode() {
+        return cityCode;
+    }
+
+    public void setCityCode(Integer cityCode) {
+        this.cityCode = cityCode;
+    }
+
+    public Integer getProvinceId() {
+        return provinceId;
+    }
+
+    public void setProvinceId(Integer provinceId) {
+        this.provinceId = provinceId;
+    }
+
+    @Override
+    public String toString() {
+        return "City{" +
+                "id=" + id +
+                ", cityName='" + cityName + '\'' +
+                ", cityCode=" + cityCode +
+                ", provinceId=" + provinceId +
+                '}';
+    }
+}

app/src/main/java/com/casflawed/flameking/weather/db/County.java

@@ -0,0 +1,50 @@
+package com.casflawed.flameking.weather.db;
+
+public class County extends LitePalSupport{
+    private Integer id;
+    private String  countyName;
+    private Integer weatherId;
+    private Integer cityId;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getCountyName() {
+        return countyName;
+    }
+
+    public void setCountyName(String countyName) {
+        this.countyName = countyName;
+    }
+
+    public Integer getWeatherId() {
+        return weatherId;
+    }
+
+    public void setWeatherId(Integer weatherId) {
+        this.weatherId = weatherId;
+    }
+
+    public Integer getCityId() {
+        return cityId;
+    }
+
+    public void setCityId(Integer cityId) {
+        this.cityId = cityId;
+    }
+
+    @Override
+    public String toString() {
+        return "County{" +
+                "id=" + id +
+                ", countyName='" + countyName + '\'' +
+                ", weatherId=" + weatherId +
+                ", cityId=" + cityId +
+                '}';
+    }
+}

app/src/main/java/com/casflawed/flameking/weather/db/Province.java

@@ -0,0 +1,40 @@
+package com.casflawed.flameking.weather.db;
+
+public class Province extends LitePalSupport{
+    private Integer id;
+    private Integer provinceCode;
+    private String provinceName;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public Integer getProvinceCode() {
+        return provinceCode;
+    }
+
+    public void setProvinceCode(Integer provinceCode) {
+        this.provinceCode = provinceCode;
+    }
+
+    public String getProvinceName() {
+        return provinceName;
+    }
+
+    public void setProvinceName(String provinceName) {
+        this.provinceName = provinceName;
+    }
+
+    @Override
+    public String toString() {
+        return "Province{" +
+                "id=" + id +
+                ", provinceCode=" + provinceCode +
+                ", provinceName='" + provinceName + '\'' +
+                '}';
+    }
+}

gradle.properties

@@ -18,4 +18,5 @@ android.useAndroidX=true
 # Enables namespacing of each library's R class so that its R class includes only the
 # resources declared in the library itself and none from the library's dependencies,
 # thereby reducing the size of the R class for that library
-android.nonTransitiveRClass=true
+android.nonTransitiveRClass=true
+android.enableJetifier=true