mediaplayer.isPlaying 总是得到 false

Question

我目前正在开发聊天应用程序。在此具有发送语音注释的功能。语音笔记的发送和播放工作正常。但是问题是，当我播放语音时，之前播放的语音不会停止..两者一起播放。

这是我播放语音笔记的代码，

 public static class MessageViewHolder extends RecyclerView.ViewHolder {

    private TextView messageTextView;
    private ImageView messageImageView;
    private TextView timeTextView;
    private LinearLayout textMessageLayout;
    private TextView messengerNameTextView;
    private CircleImageView messengerPhotoImageView;
    ImageView leftQuackImage, rightQuackImage;
    private LinearLayout voiceNotesLayout;
    private ImageView playImageView, stopImageView;
    private SeekBar progressSeekbar;

    private MediaPlayer mPlayer;
    double timeElapsed = 0, finalTime = 0;
    Handler durationHandler = new Handler();
    Runnable updateSeekBarTime;
    boolean isPlaying;

    public MessageViewHolder(View itemView) {
        super(itemView);
        messageTextView = (TextView) itemView.findViewById(R.id.messageTextView);
        messageImageView = (ImageView) itemView.findViewById(R.id.messageImageView);
        timeTextView = (TextView) itemView.findViewById(R.id.timeTextView);
        textMessageLayout = (LinearLayout) itemView.findViewById(R.id.textMessageLayout);
        messengerNameTextView = (TextView) itemView.findViewById(R.id.messengerTextView);
        messengerPhotoImageView = (CircleImageView) itemView.findViewById(R.id.messengerImageView);
        leftQuackImage = (ImageView) itemView.findViewById(R.id.leftQuackImage);
        rightQuackImage = (ImageView) itemView.findViewById(R.id.rightQuackImage);
        voiceNotesLayout = (LinearLayout) itemView.findViewById(R.id.voiceNotesLayout);
        playImageView = (ImageView) itemView.findViewById(R.id.playImageView);
        stopImageView = (ImageView) itemView.findViewById(R.id.stopImageView);
        progressSeekbar = (SeekBar) itemView.findViewById(R.id.progressSeekbar);
        isPlaying = false;
        mPlayer = new MediaPlayer();
    }
    public  void setupAudioPlay(final long duration, final String url){
        progressSeekbar.setMax((int) duration);
        progressSeekbar.setClickable(false);
        mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        try {
            mPlayer.setDataSource(url);
            mPlayer.prepareAsync();
        } catch (IOException e) {
            e.printStackTrace();
        }catch (IllegalStateException e){
            e.printStackTrace();
        }

        playImageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Log.e("Media player","isPlaying"+mPlayer.isPlaying()+isPlaying);
                if (mPlayer.isPlaying()) {
                    mPlayer.stop();
                    mPlayer.release();
                    mPlayer = null;
                }
                if (!isPlaying) {
                    isPlaying = true;
                    mPlayer.start();
                    playImageView.setVisibility(View.GONE);
                    stopImageView.setVisibility(View.VISIBLE);
                    timeElapsed = mPlayer.getCurrentPosition();
                    progressSeekbar.setProgress((int) timeElapsed);
                    durationHandler.postDelayed(updateSeekBarTime, 100);

                } else {
                    isPlaying = false;
                    mPlayer.pause();
                }
            }
        });

        stopImageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (isPlaying) {
                    if (stopPlaying()) {
                        playImageView.setVisibility(View.VISIBLE);
                        stopImageView.setVisibility(View.GONE);
                    }
                }
            }
        });

        mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                if (mp != null) {
                    mPlayer.seekTo(0);
                    isPlaying = false;
                    progressSeekbar.setProgress(0);
                }
                playImageView.setVisibility(View.VISIBLE);
                stopImageView.setVisibility(View.GONE);
            }
        });

        updateSeekBarTime = new Runnable() {
            public void run() {
                if (mPlayer != null) {
                    if (mPlayer.isPlaying()) {
                        timeElapsed = mPlayer.getCurrentPosition();
                        progressSeekbar.setProgress((int) timeElapsed);
                        durationHandler.postDelayed(this, 100);
                    } else {
                        mPlayer.pause();
                        isPlaying = false;
                        progressSeekbar.setProgress(0);
                        playImageView.setVisibility(View.VISIBLE);
                        stopImageView.setVisibility(View.GONE);
                    }
                }
            }
        };
    }

    private boolean stopPlaying() {
        mPlayer.pause();
        mPlayer.seekTo(0);
        if (!mPlayer.isPlaying()) {
            return true;
        }
        return false;
    }
}

此处 mPlayer.isPlaying 总是为假。

请帮帮我！

Answer 1

您可以随时查看系统音频状态。在您的情况下，无论何时单击播放按钮，都应首先检查以下条件。

AudioManager manager = (AudioManager)this.getSystemService(Context.AUDIO_SERVICE);
if(manager.isMusicActive()) 
{
    // to do
}

在 to do 部分，您应该执行主要操作，即：

KeyEvent event = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PAUSE);
audioManager.dispatchMediaKeyEvent(event);

您可以找到完整的文档here

Answer 2

来自documentation：

When the call to pause() returns, the MediaPlayer object enters the Paused state. Note that the transition from the Started state to the Paused state and vice versa happens asynchronously in the player engine. It may take some time before the state is updated in calls to isPlaying(), and it can be a number of seconds in the case of streamed content.

这里可能就是这种情况。声音没有停止的原因和 isPlaying() returns true 的原因可能不同。例如，多个 MediaPlayer 实例可能并行存在，将 mPlayer 设置为静态将排除此类选项。

mediaplayer.isPlaying 总是得到 false

mediaplayer.isPlaying always gets false

java

android

android-mediaplayer