Android媒体播放器不停止。当我点击播放按钮时，它会多次播放。

Question

当我一次又一次点击播放按钮时，它同时播放了多次。我想停止多次播放。下面是代码。

媒体播放器和按钮的对象

MediaPlayer mPlayer;
Button playbtn;
Button stopbtn;

按键点击事件监听器播放音频

playbtn = (Button) findViewById(R.id.play);
playbtn.setOnClickListener(new OnClickListener() {

    public void onClick(View v) {

                Uri myUri1 = Uri.parse("file:///sdcard/Birds/parrot.mp3");
                mPlayer = new MediaPlayer();
                mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

                try {

                    mPlayer.setDataSource(getApplicationContext(), myUri1);
                } catch (IllegalArgumentException e) {
                    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
                } catch (SecurityException e) {
                    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
                } catch (IllegalStateException e) {
                    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                try {
                    mPlayer.prepare();
                } catch (IllegalStateException e) {
                    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
                } catch (IOException e) {
                    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
                }
                mPlayer.start();

按键点击事件监听器，停止音频

stopbtn = (Button) findViewById(R.id.stop);
stopbtn.setOnClickListener(new OnClickListener() {

    public void onClick(View v) {
        // TODO Auto-generated method stub
        if(mPlayer!=null && mPlayer.isPlaying()){
            mPlayer.stop();
        }
    }
});

请多多指教 谢谢!

Answer 1

每点击一次播放都会创建一个新的播放器，但只保留最后一个播放器的引用，所以解决方案是将播放器保存在一个列表中并停止所有的播放器。

private List<MediaPlayer> players = new ArrayList<>()



stopbtn = (Button) findViewById(R.id.stop);
stopbtn.setOnClickListener(new OnClickListener() {

    public void onClick(View v) {

        for(player in players){
            if(player!=null && player.isPlaying()){
                mPlayer.stop();
            }
        }
        players.clear();
    }
});

另一个解决方案是，只使用一个播放器的实例，将播放器初始化移到点击之外，作为。

playbtn = (Button) findViewById(R.id.play);

Uri myUri1 = Uri.parse("file:///sdcard/Birds/parrot.mp3");
mPlayer = new MediaPlayer();
mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

try {

    mPlayer.setDataSource(getApplicationContext(), myUri1);
} catch (IllegalArgumentException e) {
    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
} catch (SecurityException e) {
    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
} catch (IllegalStateException e) {
    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
} catch (IOException e) {
    e.printStackTrace();
}


try {
    mPlayer.prepare();
} catch (IllegalStateException e) {
    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
} catch (IOException e) {
    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
}
playbtn.setOnClickListener(new OnClickListener() {

    public void onClick(View v) {
            if(!mPlayer.isPlaying())
                mPlayer.start();