【版权说明】
1. 请支持原创,转载请注明出处:https://blog.csdn.net/cbk861110/article/details/86665564
2. 项目源码请移步:https://github.com/caobaokang419/WeatherApp(欢迎Github Fork&Star,框架和技术实现不妥之处,请帮忙指正),谢谢!
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基于MVVM框架的高德天气APP:
MVVM框架和组件实现:
- Room:一个简单好用的对象映射层;其对SqliteDatabase进行了封装,简化开发者对于数据持久层的开发工作量
一、 技术背景:
room,Android推荐的DB实现库,使用库提供的大量注解自动生成相关DB类和代码,极大简化应用开发DB模块代码量;
二、 实现方式(以高德城市配置表DB为例):
1. gradle中集成Room jar:
implementation "android.arch.persistence.room:runtime:1.0.0"
implementation "android.arch.persistence.room:rxjava2:1.0.0"
annotationProcessor "android.arch.persistence.room:compiler:1.0.0"
2. room table表实现:
@Entity(tableName = CityInfoEntity.TABLE_NAME)
public class CityInfoEntity {
public static final String TABLE_NAME = "city_info";
@PrimaryKey
public long id;
@ColumnInfo(name = "city_name")
public String city_name;
@ColumnInfo(name = "adcode")
public String adcode;
public void setCityName(String cityname) {
city_name = cityname;
}
public String getCityName() {
return city_name;
}
public void setAdcode(String adcode) {
this.adcode = adcode;
}
public String getAdcode() {
return adcode;
}
}
3. room DAO 实现:
@Dao
public interface CityInfoDAO {
@Query("SELECT * FROM " + CityInfoEntity.TABLE_NAME)
List<CityInfoEntity> getAll();
@Query("SELECT * FROM " + CityInfoEntity.TABLE_NAME + " WHERE id IN (:ids)")
List<CityInfoEntity> getAllByIds(long[] ids);
@Insert
void insert(CityInfoEntity... entities);
@Delete
void delete(CityInfoEntity entity);
@Update
void update(CityInfoEntity entity);
}
4. room database 实现:
@Database(entities = {CityForecastEntity.class, CityInfoEntity.class}, version = 1, exportSchema = false)
public abstract class WtDatabase extends RoomDatabase {
public static final String WEATHER_DB_NAME = "weather_db";
private static WtDatabase mWtDatabase;
private static final Object mLock = new Object();
/*城市天气数据DB*/
public abstract CityForecastDAO cityForecastDAO();
/*城市配置表DB*/
public abstract CityInfoDAO cityInfoDAO();
@Override
public void clearAllTables() {
}
public static WtDatabase getInstance(Context context) {
synchronized (mLock) {
if (mWtDatabase == null) {
mWtDatabase =
Room.databaseBuilder(context.getApplicationContext(),
WtDatabase.class,
WtDatabase.WEATHER_DB_NAME)
/*.allowMainThreadQueries()*//*db 耗时不应在UI线程发起*/
.build();
}
return mWtDatabase;
}
}
}
5. room 使用方法举例(插入cityinfo data item):
private void insertCityInfo(CityInfoEntity entity) {
WtDatabase.getInstance(WtApplication.getInstance()).cityInfoDAO().insert(entity);
}
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文章目录(未完,待续):
一:android 应用子功能及移动框架总述 https://blog.csdn.net/cbk861110/article/details/86665564
二:android 高德天气API说明及城市天气查询实现 https://blog.csdn.net/cbk861110/article/details/86665655
三:android 自定义控件实现(ActionBar + PageIndicatorView) https://blog.csdn.net/cbk861110/article/details/86665790
四:android ViewPager实现左右页面滑动切换 https://blog.csdn.net/cbk861110/article/details/86665964
五:android应用权限动态申请 https://blog.csdn.net/cbk861110/article/details/86666321
六:android RecyclerView 封装及使用 https://blog.csdn.net/cbk861110/article/details/86666392
七:android Xutils3文件下载实现(高德天气城市配置) https://blog.csdn.net/cbk861110/article/details/86666573
八:android DiskLruCache 磁盘缓存 封装和使用 https://blog.csdn.net/cbk861110/article/details/86666664
九:android ThreadPoolExecutor线程池 封装及使用 https://blog.csdn.net/cbk861110/article/details/86667101
十:android 天气网络请求框架(retrofit2&okhttp3&Gson) 封装及使用 https://blog.csdn.net/cbk861110/article/details/86667375
十一:android RxAndroid(响应式编程) 异步网络请求实现 https://blog.csdn.net/cbk861110/article/details/86669178
十二:android DataBinding 数据和UI双向绑定实现 https://blog.csdn.net/cbk861110/article/details/86669708
十三:android room数据库 天气数据读写实现 https://blog.csdn.net/cbk861110/article/details/86670354
十四:android LiveData 使用方法(实现城市天气自动刷新) https://blog.csdn.net/cbk861110/article/details/86670531
十五:android ViewModel 使用方法 https://blog.csdn.net/cbk861110/article/details/86670703
十六:android 集成友盟消息推送机制(U-Push) https://blog.csdn.net/cbk861110/article/details/86683849
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【版权说明】
1. 请支持原创,转载请注明出处:https://blog.csdn.net/cbk861110/article/details/86665564
2. 项目源码请移步:https://github.com/caobaokang419/WeatherApp(欢迎Github Fork&Star,框架和技术实现不妥之处,请帮忙指正),谢谢!