Question

在我的应用程序中，我在listview中显示我的音频文件，并且当listitem特定文件的点击必须在listbar单元格中使用seekbar播放时。但现在我想在播放结束时更新ui。我使用了onCompletionListener，但在重放开始时会重复调用。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);
    }

这是获取的日志信息，

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MediaPlayers中使用ViewPager时出现类似问题。事实证明，MediaPlayers遇到了错误，导致OnCompletionListener被调用。来自OnErrorListener documentation：

<强>返回

如果方法处理错误，则为true;如果不是，则为false。返回false，或者根本没有OnErrorListener，将导致调用OnCompletionListener。

为OnErrorListener实施MediaPlayers，以防止拨打OnCompletionListener。

Mediaplayer setOnCompletionListener重复调用

1 个答案: