Возвращается NullPointerException, когда я нажимаю кнопку воспроизведения, где я хочу связать кнопку остановки со значением метода getCount (), который находится в классе Service, который должен возвращать 1, происходит сбой при нажатии кнопки воспроизведения ,
Это класс активности:
public class MainMP3 extends Activity{
Button stop;
static final String MEDIA_PATH = new String("/sdcard/");
Button data_display;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mp3interface);
startService(new Intent(MainMP3.this, ServiceMP3.class));
stop= (Button) findViewById(R.id.stop);
// to stop service
//stopService(new Intent(MainMP3.this, ServiceMP3.class));
Button button = (Button)findViewById(R.id.play);
button.setOnClickListener(new StartClick());
}
private ServiceMP3 service = null;
private ServiceConnection connection = new ServiceConnection() {
@Override // Called when connection is made
public void onServiceConnected(ComponentName cName, IBinder binder) {
service = ((ServiceMP3.SlowBinder)binder).getService();
}
@Override //
public void onServiceDisconnected(ComponentName cName) {
service = null;
}
};
private class StartClick implements View.OnClickListener {
public void onClick(View v) {
int data = service.getCount();
stop.setText(Integer.toString(data));
}
}
}
и вот услуга:
public class ServiceMP3 extends Service {
private static final String MEDIA_PATH = new String("/sdcard/");
private MediaPlayer mp = new MediaPlayer();
private List<String> songs = new ArrayList<String>();
private int currentPosition;
int count=1;
private NotificationManager nm;
private static final int NOTIFY_ID = R.layout.song;
public int getCount() {return count;}
@Override
public void onCreate() {
super.onCreate();
BindAllSongs();
System.out.println(MEDIA_PATH+ songs.get(currentPosition));
for (int i = 0; i < songs.size(); i++) {
System.out.println(songs.get(i).toString());
}
nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
// playSong(MEDIA_PATH+ songs.get(currentPosition));
// Thread thr = new Thread(null, work, "Play Song");
// thr.start();
// Toast.makeText(this, "Service Started", Toast.LENGTH_SHORT).show();
// player = MediaPlayer.create(ServiceMP3.this, R.raw.test);
// player.start();
// player.setLooping(true);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(this, "Service started...", Toast.LENGTH_LONG).show();
return Service.START_NOT_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
mp.stop();
mp.release();
nm.cancel(NOTIFY_ID);
Toast.makeText(this, "Service Stopped", Toast.LENGTH_SHORT).show();
}
public void BindAllSongs()
{
// TODO Auto-generated method stub
//To hold all the audio files from SDCARD
File fileListBeforeFiltering = new File(MEDIA_PATH);
//Filter all the MP# format songs to list out
//Checking for the MP3 Extension files existence
if (fileListBeforeFiltering.listFiles(new FilterFilesByMp3Extension()).length > 0)
{
//Loop thru all the files filtered and fill them in SongsList view that we have
//Defined above.
for (File file : fileListBeforeFiltering.listFiles(new FilterFilesByMp3Extension()))
{
//Adding all filtered songs to the list
songs.add(file.getName());
}
}
}
void playSong(String file) {
try {
mp.setDataSource(file);
mp.prepare();
mp.start();
mp.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer arg0) {
nextSong();
}
});
} catch (IOException e) {
Log.e(getString(R.string.app_name), e.getMessage());
}
}
void nextSong() {
// Check if last song or not
if (++currentPosition >= songs.size()) {
currentPosition = 0;
nm.cancel(NOTIFY_ID);
} else {
playSong(MainMP3.MEDIA_PATH + songs.get(currentPosition));
}
}
void prevSong() {
if (mp.getCurrentPosition() < 3000 && currentPosition >= 1) {
playSong(MainMP3.MEDIA_PATH + songs.get(--currentPosition));
} else {
playSong(MainMP3.MEDIA_PATH + songs.get(currentPosition));
}
}
Runnable work = new Runnable() {
public void run() {
while (true) {
System.out.println("Runnable method....");
}
}
};
private final IBinder binder = new SlowBinder();
@Override
public IBinder onBind(Intent intent) {
return binder;
}
public class SlowBinder extends Binder {
ServiceMP3 getService() {
return ServiceMP3.this;
}
}
}