用BroadcastReceiver控制Service

通过在Service类的内部定义BroadcastReceiver对象，接收外部发送的广播，达到控制Service的目的。

步骤如下：

1、自定义Service的子类

2、在该Service子类中定义一个内部类，该类是BroadcastReceiver的子类

3、在Service类的onCreate方法中注册该广播接收者类，并设置action的值

4、在Activity中启动或绑定Service

5、在Activity中发送广播并传递数据，调用Service中的广播接收者的onReceive()方法

MyService.java 

public class MyService extends Service {
	private String tag = "MyService";

	@Override
	public IBinder onBind(Intent intent) {
		return null;
	}

	// 服务创建史执行，只会执行一次
	public void onCreate() {
		try {
			Log.i(tag, "MyService onCreate().....");
                   
			MyReceiver myReceiver = new MyReceiver();
			IntentFilter filter = new IntentFilter();
			filter.addAction(Constant.ACTION_PALY);
			filter.addAction(Constant.ACTION_PAUSE);
			registerReceiver(myReceiver, filter);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		Log.i(tag, "MyService onStartCommand().....");
		return super.onStartCommand(intent, flags, startId);
	}

	public void play() {
		Log.i(tag, "my function Paly()....");
	}

	public void pause() {
		Log.i(tag, "my function Pause()....");
	}

	private class MyReceiver extends BroadcastReceiver {
		@Override
		public void onReceive(Context context, Intent intent) {
			Log.i(tag, intent.getAction());
			try {
				if (Constant.ACTION_PALY.equals(intent.getAction())) {
					MyService.this.play();
				} else if (Constant.ACTION_PAUSE.equals(intent.getAction())) {
					MyService.this.pause();
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}
}

MainActivity.java

public class MainActivity extends Activity {
	Button paly, pause;
	Intent intent;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		try {
			paly = (Button) findViewById(R.id.btn_paly);
			pause = (Button) findViewById(R.id.btn_pause);
			intent = new Intent(Constant.ACTION_MYSERVICE);
			startService(intent);
			paly.setOnClickListener(new OnClickListener() {
				@Override
				public void onClick(View v) {
					try {
						Log.i("MainActivity", "点击了Button_Play w  ..");
//						Intent broadcast = new Intent();
//						broadcast.setAction(Constant.ACTION_PALY);
						//或者用下面方法启动服务
						intent.setAction(Constant.ACTION_PALY);
						sendBroadcast(intent);
					} catch (Exception e) {
						e.printStackTrace();
					}
				}
			});
			pause.setOnClickListener(new OnClickListener() {
				@Override
				public void onClick(View v) {
					Log.i("MainActivity", "点击了Button_Pause ..");
					Intent broadcast = new Intent();
					broadcast.setAction(Constant.ACTION_PAUSE);
					sendBroadcast(broadcast);
				}
			});
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

 

Constant.java提供常量

public class Constant {
	public static final String ACTION_PALY = "com.lydia.service.ACTION_PALY";
	public static final String ACTION_PAUSE = "com.lydia.service.ACTION_PAUSE";
	public static final String ACTION_MYSERVICE = "com.lydia.service.ACTION_MYSERVICE";
}

 

AndroidManifest.java中的配置

       <service android:name=".MyService" >
            <intent-filter >
                <action android:name="com.lydia.service.ACTION_MYSERVICE"/>
            </intent-filter>
        </service>

测试结果：

启动程序便启动了Service,在启动Service的时候调用了MyService类中的onCreate()方法，该方法中注册了广播。当点击Button的时候，开始发送广播，广播发送后哦，MyReceiver类就会开始接收广播，调用onReceive()方法，根据intent.getAction()得到的Action的不同去执行不同的业务方法。