android - Mediaplayer setOnCompletionListener 重复调用

Question

在我的应用程序中，我在 ListView 中显示我的音频文件，当单击列表项时，必须使用搜索栏在 ListView 单元格内播放特定文件。但现在我想在播放结束时更新用户界面。我用过 onCompletionListener，但它在播放开始时重复调用。 这是我的代码

private void startPlayBack(final MessagesAdapter.ViewHolder viewHolder){

        try {

            if(mMediaPlayer!=null){
                if(mMediaPlayer.isPlaying()) {
                    mMediaPlayer.stop();
                }
            }
            mMediaPlayer.reset();
            mMediaPlayer.setDataSource(viewHolder.mChatMessage.mMessages);
            mMediaPlayer.prepareAsync();

        } catch (IOException e) {
            Log.i("audioplay", "IOException *************",e);
        }catch (IllegalStateException e) {
            Log.i("audioplay", "IllegalStateException *************",e);
        }

        mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mediaPlayer) {

                viewHolder.mAudioPlayBtn.setVisibility(View.VISIBLE);
                viewHolder.mAudioPlayBtn.setImageDrawable(mContext.getResources().getDrawable(R.drawable.audio_close));
                mMediaPlayer.setLooping(false);
                mMediaPlayer.start();
            }
        });

        mMediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mediaPlayer) {
                Log.i("Completion Listener", "audio Completed");
            }
        });

        viewHolder.mAudioSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                if (mMediaPlayer != null && fromUser) {
                    mMediaPlayer.seekTo(progress * 1000);
                    mMediaPlayer.start();
                }
            }
        });

        seekUpdation(viewHolder);
    }

这是得到的日志信息，

08-20 07:28:24.099  14873-14873/com.cybosol.sabanet I/Completion Listener﹕ audio Completed
08-20 07:28:24.099  14873-14873/com.cybosol.sabanet I/Completion Listener﹕ audio Completed
08-20 07:28:24.099  14873-14873/com.cybosol.sabanet I/Completion Listener﹕ audio Completed
08-20 07:28:24.103  14873-14873/com.cybosol.sabanet I/Completion Listener﹕ audio Completed
08-20 07:28:24.107  14873-14873/com.cybosol.sabanet I/Completion Listener﹕ audio Completed
08-20 07:28:24.107  14873-14873/com.cybosol.sabanet I/Completion Listener﹕ audio Completed
08-20 07:28:25.739  14873-14873/com.cybosol.sabanet I/Completion Listener﹕ audio Completed
08-20 07:28:26.415  14873-14873/com.cybosol.sabanet I/Completion Listener﹕ audio Completed
08-20 07:28:26.415  14873-14873/com.cybosol.sabanet I/Completion Listener﹕ audio Completed
08-20 07:28:26.419  14873-14873/com.cybosol.sabanet I/Completion Listener﹕ audio Completed
08-20 07:28:26.419  14873-14873/com.cybosol.sabanet I/Completion Listener﹕ audio Completed
08-20 07:28:27.323  14873-14873/com.cybosol.sabanet I/Completion Listener﹕ audio Completed
08-20 07:28:27.959  14873-14873/com.cybosol.sabanet I/Completion Listener﹕ audio Completed

Answer 1

在 ViewPager 中使用 MediaPlayers 时，我遇到了类似的问题。结果是 MediaPlayers 遇到错误，导致调用 OnCompletionListener。来自OnErrorListener documentation :

Returns

True if the method handled the error, false if it didn't. Returning false, or not having an OnErrorListener at all, will cause the OnCompletionListener to be called.

为您的 MediaPlayers 实现一个 OnErrorListener 以防止对 OnCompletionListener 的无关调用。