我已经在Android中为媒体播放器创建了演示程序，开始运行我的应用程序时遇到了问题。当我的应用程序运行时，歌曲正在播放但没有播放完整的歌曲，它只是开始并立即完成意味着它只是开始活动并立即进入resume（）状态。当歌曲结束播放时，我又重新启动，我的活动歌曲没有从头开始播放，而是从中间开始播放。我在过去的1周里遇到了这个问题，我不知道该如何解决。请任何人帮助我。这是我的代码。非常感谢。
public class Audio_Activity extends Activity
{
private MediaPlayer mp = null;
PhoneStateListener phListener;
int length;
SharedPreferences prefs;
ImageView imgVw;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.audio);
init();
imgVw.setImageResource(R.raw.teddy_two);
prefs = PreferenceManager.getDefaultSharedPreferences(this);
final SharedPreferences. Editor prefsEdit = prefs.edit();
mp=MediaPlayer.create(Audio_Activity.this,R.raw.issaq_tera_by_vishu);
Log.e("Song is playing","in Mediya Player ");
mp.start();
mp.setLooping(false);
System.out.println("Media Plyer Is Start !!!");
prefsEdit.putBoolean("mediaplaying", true);
prefsEdit.commit();
btnChapter.setEnabled(false);
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener()
{
@Override
public void onCompletion(MediaPlayer mp)
{
// TODO Auto-generated method stub
mp.stop();
System.out.println("Media Plyer Is Complete !!!");
//mp.release();
prefsEdit.putBoolean("mediaplaying", false);
prefsEdit.commit();
btnChapter.setEnabled(true);
System.out.println("Music is over and Button is enable !!!!!!");
}
});
PhoneStateListener phoneStateListener = new PhoneStateListener()
{
@Override
public void onCallStateChanged(int state, String incomingNumber)
{
if (state == TelephonyManager.CALL_STATE_RINGING)
{
if(mp!=null)
{
setPlayerButton(true, false, true);
if(mp.isPlaying())
{
mp.pause();
}
}
} else if(state == TelephonyManager.CALL_STATE_IDLE) {
} else if(state == TelephonyManager.CALL_STATE_OFFHOOK) {
}
super.onCallStateChanged(state, incomingNumber);
}
};
TelephonyManager mgr = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
if(mgr != null)
{
mgr.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
}
}
private void setPlayerButton(Boolean play, Boolean pause, Boolean stop){
btnStartStop.setEnabled(play);
if(play==true)
btnStartStop.setEnabled(true);
else
btnStartStop.setEnabled(false);
}
@Override
public void onConfigurationChanged(Configuration newConfig)
{
super.onConfigurationChanged(newConfig);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}
@Override
public void onPause()
{
super.onPause();
SharedPreferences. Editor prefsEdit = prefs.edit();
boolean isPlaying=prefs.getBoolean("mediaplaying",false);
if(isPlaying)
{
int position = mp.getCurrentPosition();
Log.e("Current ","Position -> " + position);
prefsEdit.putInt("mediaPosition", position);
prefsEdit.commit();
}
}
@Override
protected void onResume()
{
super.onResume();
System.out.println("Activity is Resume !!!");
boolean isPlaying=prefs.getBoolean("mediaplaying",false);
if(isPlaying)
{
int position = prefs.getInt("mediaPosition", 0);
mp.seekTo(position);
mp.start();
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
super.onStop();
if ((keyCode == KeyEvent.KEYCODE_BACK))
{
if(mp!= null)
{
if(mp.isPlaying())
{
mp.pause();
System.out.println("Media Player is Pause/Stop click on Back button on Emulator!!!");
}
}
finish();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
最佳答案
从歌曲中部开始的问题是因为您将歌曲的当前进度存储在SharedPreferences中，然后在onResume()处从存储在SharedPreferences的进度位置启动播放器