Play button doesn't work after music is stopped with stop button

问题

I have two buttons that will start and stop a song, when i start the app I can play the song and then stop it again. However when i wanna start it again it doesn't work.

    final Button stop = (Button) findViewById(R.id.stop);
    stop.setVisibility(View.GONE);
    final Button play = (Button) findViewById(R.id.play);

    play.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            mp.start();
            play.setVisibility(View.GONE);
            stop.setVisibility(View.VISIBLE);
        }
    });

    stop.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            mp.stop();
            stop.setVisibility(View.GONE);
            play.setVisibility(View.VISIBLE);
        }
    });

回答1:

in play.onclicklistner

 mp = MediaPlayer.create(Peshmerga.this, R.raw.sppeshmerga);
 mp.start();

add following to your stop.onclicklistner

 if (mp != null) {
        mp.stop();
        mp.release();
        mp = null;
   }

you need to create everytime you click play button .

回答2:

I guess you want to start again by play button. Add the following code above the mp.start() method:

mp.reset();
mp.prepare();
mp.start();

I guess you have rest of things set properly and in stop button use the following:

if (mp != null) {
    mp.stop();
    mp.release();
    mp = null;
}

回答3:

Look at the state diagram image in the following link:

-----------------------------------------android-mediaplayer-sample-code----------------------------------------------

mp.reset();
mp.prepare();
mp.start();

回答4:

The Play Button Click Listener:

playButton.setOnClickListener(new View.OnClickListener(){
    @Override
    public void onClick(View v){
       try{
           if(!mMediaPlayer.isPlaying()){
               mMediaPlayer = MediaPlayer.create(MainActivity.this, R.raw.test);
               mMediaPlayer.start();
           }
       }
       catch (Exception e){
       }
    }
});

Stop Button Click Listener:

stopButton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v){
                if (mMediaPlayer != null) {
                    mMediaPlayer.stop();
                    mMediaPlayer.release();
                    mMediaPlayer = null;
                    mMediaPlayer = MediaPlayer.create(MainActivity.this, R.raw.test);
                }
            }
        });

来源：https://stackoverflow.com/questions/25404731/play-button-doesnt-work-after-music-is-stopped-with-stop-button

标签

android

button

playback