1. startService
1.1Activity
调用startServise和stopService即可
final Intent intent = new Intent(MainActivity.this,StartService.class); start.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { startService(intent); } }); stop.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { stopService(intent); } });
1.2Service
service的生命周期如下：onCreate----》onStartCommand------》onDestroy
onCreate方法只调用一次 onStartCommand方法会调用多次
@Override public void onCreate() { super.onCreate(); Log.e(TAG,"onCreate"); mediaPlayer = MediaPlayer.create(this,R.raw.music); } @Override public int onStartCommand(Intent intent, int flags, int startId) { Log.e(TAG,"onStartCommand"); if(mediaPlayer.isPlaying()){ mediaPlayer.pause(); } else { mediaPlayer.start(); } return super.onStartCommand(intent, flags, startId); } @Override public void onDestroy() { Log.e(TAG,"onDestroy"); mediaPlayer.release(); super.onDestroy(); }
2.bindService
2.1Activity里面
定义ServiceConnection
onServiceConnected在onBind时调用
onServiceDisconnected在正常情况下是不被调用的，它的调用时机是当Service服务被异外销毁时，例如内存的资源不足时这个方法才被自动调用。
ServiceConnection serviceConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName componentName, IBinder iBinder) { Log.e(getClass().getName(),"onServiceConnected"); myBinder = (BindService.MyBinder) iBinder; myBinder.startMusic(); } @Override public void onServiceDisconnected(ComponentName componentName) { Log.e(getClass().getName(),"onServiceDisconnected"); } };
final Intent intent1 = new Intent(MainActivity.this,BindService.class); bind.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { bindService(intent1,serviceConnection,BIND_AUTO_CREATE); } }); unbind.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { unbindService(serviceConnection); } });
2.2Service
service的生命周期如下 onCreate----》onBind-----》onUnbind-----》onDestroy
MyBinder myBinder = new MyBinder(); MediaPlayer mediaPlayer; @Override public IBinder onBind(Intent intent) { // TODO: Return the communication channel to the service. // throw new UnsupportedOperationException("Not yet implemented"); Log.e(TAG,"onBind"); return myBinder; } @Override public void onCreate() { Log.e(TAG,"onCreate"); mediaPlayer = MediaPlayer.create(this,R.raw.music); super.onCreate(); } @Override public boolean onUnbind(Intent intent) { Log.e(TAG,"onUnbind"); return super.onUnbind(intent); } @Override public void onDestroy() { Log.e(TAG,"onDestroy"); mediaPlayer.release(); super.onDestroy(); } class MyBinder extends Binder{ public void startMusic(){ if(!mediaPlayer.isPlaying()){ mediaPlayer.start(); } } public void stopMusic(){ if(mediaPlayer.isPlaying()){ mediaPlayer.stop(); } } }
