Android中AIDL的理解与使用(一)——跨应用启动/绑定Service

AIDL(Android Interface Definition Language)——安卓接口定义语言

一、startService/stopService

1、同一个应用程序启动Service:

  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    startService(new Intent(this,AppService.class));  //启动Service
  }
  protected void onDestroy() {
    super.onDestroy();
    stopService(new Intent(this,AppService.class));  //停止Service
  }

2、跨应用启动service:

  通过Action的隐式Intent启动Service在安卓5.0以前的版本是可以实现跨应用启动Service的,安卓5.0以后的版本若想实现

跨应用启动Service的功能必须使用显示Intent。

  public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Intent serviceIntent;
    
    protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);

      serviceIntent = new Intent();
      serviceIntent.setComponent(new ComponentName("com.w.startservicefromanotherapp","com.w.startservicefromanotherapp.AppService"));

      findViewById(R.id.btnStartService).setOnClickListener(this);
      findViewById(R.id.btnStopService).setOnClickListener(this);
  }

    public void onClick(View v) {
      switch (v.getId()){
        case R.id.btnStartService:
          // Intent i = new Intent();
          //i.setComponent(new ComponentName("com.w.startservicefromanotherapp","com.w.startservicefromanotherapp.AppService"));

          //显示 Intent被启动程序的包名,被启动服务的类名
          startService(serviceIntent);
          break;
        case R.id.btnStopService:
          stopService(serviceIntent);
          break;
         }
    }
  }

二、bindService/unbindService

跨应用绑定Service:AIDL——用于在多个应用程序之间进行通信

1、在StartServiceFromAnotherApp新建AIDL文件IAppServiceRomoteBinder,会全自动生成相关的类。

2、在返回Binder时(AppService):

  public IBinder onBind(Intent intent) {
    return new IAppServiceRomoteBinder.Stub() {
    @Override
    public void basicTypes(int anInt, long aLong, boolean aBoolean, float aFloat, double aDouble, String aString) throws RemoteException {  }
    };
  }

3、在AnotherApp项目中绑定这个服务:

  findViewById(R.id.btnBindService).setOnClickListener(this);
  findViewById(R.id.btnUnbindService).setOnClickListener(this);


  case R.id.btnBindService:
    bindService(serviceIntent,this, Context.BIND_AUTO_CREATE);
    break;
  case R.id.btnUnbindService:
    unbindService(this);
    break;

  @Override
  public void onServiceConnected(ComponentName name, IBinder service) {
    System.out.println("Bind Service");
    System.out.println(service);  //显示IBinder service
  }

  @Override
  public void onServiceDisconnected(ComponentName name) {  }

 

posted @ 2016-12-27 16:21  Sheldon_wz  阅读(3485)  评论(0编辑  收藏  举报