使用application类，实现共享对象实例，实现service与activity交互，ui更新等

 

1. 定义application类，这个类可以保存获取activity实例，记得manifest中加入android:name=".MyApp"
public class MyApp extends Application{
        private MyServiceActivity myActivity;
        
        public void setInstance(MyServiceActivity instance){
                myActivity = instance;
        }
        
        public MyServiceActivity getInstance(){
                return myActivity;
        }
}
2. 在activity中保存实例       
public class MyServiceActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ((MyApp)getApplication()).setInstance(this);
    ……
    }
}
3. 在service中取回实例
public class MyService extends Service {
        MyServiceActivity myActivity;
        @Override 
        public void onCreate() {
                super.onCreate();
                setForeground(true);
                android.os.Debug.waitForDebugger();
                myActivity = ((MyApp)getApplication()).getInstance();
                ……
       }
}

评论

1 楼 b87936260 2012-07-18  

还不如搞一个单例的类来共享数据，保证UI和数据分离