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私は自分のプロジェクトでメディアプレーヤーを実装しましたが、アプリケーションを終了しても音楽を再生しますが、アプリケーションを終了すると、音楽。 私が直面している私の問題は、私のアプリケーションが未熟なアプリケーションを再び開くたびに、以前のものを再生して、音楽をもう一度再生することです。私は間違っていますか？バックグラウンドサービスでメディアプレーヤーを正しく機能させることができません
私の必要条件は、音楽を開いたらすぐに再生を開始する必要があります。私のアプリを終了しても、バックグラウンドで再生する必要があります。
Main_activity.java
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
String msg = "Android : ";
private Button play,pause,restart;
LocalService mService;
boolean mBound = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
play=(Button) findViewById(R.id.play);
pause=(Button) findViewById(R.id.pause);
restart=(Button) findViewById(R.id.restart);
play.setOnClickListener(this);
pause.setOnClickListener(this);
restart.setOnClickListener(this);
Intent intent = new Intent(this, LocalService.class);
startService(intent);
}
/** Called when the activity is about to become visible. */
@Override
protected void onStart() {
super.onStart();
Log.d(msg, "The onStart() event");
Intent intent = new Intent(this, LocalService.class);
bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
}
/** Called when the activity has become visible. */
@Override
protected void onResume() {
super.onResume();
Log.d(msg, "The onResume() event");
}
/** Called when another activity is taking focus. */
@Override
protected void onPause() {
super.onPause();
Log.d(msg, "The onPause() event");
}
/** Called when the activity is no longer visible. */
@Override
protected void onStop() {
super.onStop();
Log.d(msg, "The onStop() event");
}
/** Called just before the activity is destroyed. */
@Override
public void onDestroy() {
super.onDestroy();
Log.d(msg, "The onDestroy() event");
Log.d("mbound value",mBound+"");
if (mBound) {
Intent intent=new Intent(this,LocalService.class);
stopService(intent);
unbindService(mConnection);
mBound = false;
}
}
@Override
public void onClick(View v) {
switch (v.getId()){
case(R.id.play):
if(mBound)
mService.start_mp();
break;
case(R.id.pause):
if(mBound)
mService.pause_mp();
break;
case (R.id.restart):
if(mBound)
mService.restart_mp();
break;
default:
break;
}
}
/** Defines callbacks for service binding, passed to bindService() */
public ServiceConnection mConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName className,
IBinder service) {
// We've bound to LocalService, cast the IBinder and get LocalService instance
LocalService.LocalBinder binder = (LocalService.LocalBinder) service;
mService = binder.getService();
mBound = true;
}
@Override
public void onServiceDisconnected(ComponentName arg0) {
mBound = false;
}
};
}
LocalSe - 音楽がここに
の再生を停止すべきであることは私のコードですrvice.java
public class LocalService extends Service {
private MediaPlayer mediaPlayer;
// Binder given to clients
private final IBinder mBinder = new LocalBinder();
@Nullable
@Override
public IBinder onBind(Intent intent) {
Log.i("Onbind called","");
return mBinder;
}
/** Called when the service is being created. */
@Override
public void onCreate() {
super.onCreate();
mediaPlayer=MediaPlayer.create(this,R.raw.jingle);
}
/** The service is starting, due to a call to startService() */
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
mediaPlayer.start();
Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();
return START_STICKY;
}
/** Called when all clients have unbound with unbindService() */
@Override
public boolean onUnbind(Intent intent) {
return true;
}
/** Called when a client is binding to the service with bindService()*/
@Override
public void onRebind(Intent intent) {
super.onRebind(intent);
}
/** Called when The service is no longer used and is being destroyed */
@Override
public void onDestroy() {
super.onDestroy();
// Toast.makeText(this, "Service Destroyed", Toast.LENGTH_LONG).show();
}
/**
* Class used for the client Binder. Because we know this service always
* runs in the same process as its clients, we don't need to deal with IPC.
*/
public class LocalBinder extends Binder {
LocalService getService() {
// Return this instance of LocalService so clients can call public methods
return LocalService.this;
}
}
public void start_mp(){
if(!mediaPlayer.isPlaying())
mediaPlayer.start();
}
public void pause_mp(){
mediaPlayer.pause();
}
public void restart_mp(){
if(mediaPlayer.isPlaying()) mediaPlayer.release();
mediaPlayer=MediaPlayer.create(this,R.raw.jingle);
mediaPlayer.start();
}
}
P.S.-私は私のアプリ内のプレーヤーの機能のための私のアプリケーションでボタンを適用しています。