Activity与Service通信

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Activity向Service发消息（在Service运行过程中）：

在Service中实现一个继承自Binder的内部类，

private final IBinder binder = new LocalBinder();  public class LocalBinder extends Binder {  public LogService getService() {         return LogService.this;     }   public void stopRunning(){isRunning = false;}}  @Overridepublic IBinder onBind(Intent intent) {// TODO Auto-generated method stubreturn binder;}

在Activity中获取这个binder实例：

private boolean isConnected;    private ServiceConnection mConnection = new ServiceConnection() {                  @Override          public void onServiceDisconnected(ComponentName arg0) {              // TODO Auto-generated method stub              isConnected=false;          }                    @Override          public void onServiceConnected(ComponentName arg0, IBinder binder) {              // TODO Auto-generated method stub          localBinder = (LocalBinder) binder;          logSvc =((LocalBinder) localBinder).getService();                      isConnected=true;                      }      };

启动服务并bind：

startService(intent);doBindService();

即可通过这个binder实例与运行中的service通信：

localBinder.stopRunning();

Service向Activity发消息：

利用BroadcastReceiver。在Activity中注册：

mReceiver = new timeUpReceiver();IntentFilter filter = new IntentFilter();filter.addAction("com.zhuming.broadcast.timeup");this.registerReceiver(mReceiver, filter);public class timeUpReceiver extends BroadcastReceiver {  @Override public void onReceive(Context context, Intent intent) { toggleBtn.setChecked(false); toggleTxt.setText("等待超时，请重新开启服务"); }}

在Service中发送广播：

Intent intent = new Intent("com.zhuming.broadcast.timeup");sendBroadcast(intent);

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