Android mediaPlayer.getDuration() return 0 或 -1

Question

我正在创建在线媒体播放器，我们在 URL 的帮助下播放歌曲。在 Media Player 中，我们显示歌曲的总时间，为了显示时间，我们使用 mediaPlayer.getDuration() 函数，但它总是返回 -1。

When I am passing Drop Box URL then it working but when I pass my server URL (https://) then it not working.

2021-01-25 14:50:33.777 11438-11438/com.dd.xyz W/MediaPlayer: Use of stream types is deprecated for operations other than volume control
2021-01-25 14:50:33.777 11438-11438/com.dd.xyz W/MediaPlayer: See the documentation of setAudioStreamType() for what to use instead with android.media.AudioAttributes to qualify your playback use case
2021-01-25 14:50:33.778 11438-11438/com.dd.xyz V/MediaHTTPService: MediaHTTPService(android.media.MediaHTTPService@6a1c34b): Cookies: null
2021-01-25 14:50:33.783 11438-11663/com.dd.xyz V/MediaHTTPService: makeHTTPConnection: CookieHandler (java.net.CookieManager@ea97e0b) exists.
2021-01-25 14:50:33.783 11438-11663/com.dd.xyz V/MediaHTTPService: makeHTTPConnection(android.media.MediaHTTPService@6a1c34b): cookieHandler: java.net.CookieManager@ea97e0b Cookies: null
2021-01-25 14:50:34.616 11438-11438/com.dd.xyz I/mediaFileLength: -1

下面是代码-

public class MainActivity extends AppCompatActivity {

    private ImageView imageViewPlayPause;
    private TextView textCurrenTime,textTotalDuration;
    private SeekBar playerSeekBar;
    private MediaPlayer mediaPlayer;
    private Handler handler =new Handler();
    @SuppressLint("ClickableViewAccessibility")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageViewPlayPause=findViewById(R.id.imagePlayPause);
        textCurrenTime=findViewById(R.id.textCurrentTime);
        textTotalDuration=findViewById(R.id.textTotalDuration);
        playerSeekBar=findViewById(R.id.playerSeekBar);

        mediaPlayer=new MediaPlayer();
        playerSeekBar.setMax(100);

        imageViewPlayPause.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(mediaPlayer.isPlaying()){
                    handler.removeCallbacks(updater);
                    mediaPlayer.pause();
                    imageViewPlayPause.setImageResource(R.drawable.ic_play);
                }
                else{
                    mediaPlayer.start();
                    imageViewPlayPause.setImageResource(R.drawable.ic_pause);
                    updateSeekBar();
                }
            }
        });
        prepareMediaPlayer();
        playerSeekBar.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                SeekBar seekBar=(SeekBar) view;
                int playPosition=(mediaPlayer.getDuration()/100)*seekBar.getProgress();
                mediaPlayer.seekTo(playPosition);
                textCurrenTime.setText(milliSecondsToTimer(mediaPlayer.getCurrentPosition()));
                return false;
            }
        });
    }

    private void prepareMediaPlayer(){
        try{
            mediaPlayer.setDataSource("https://varkarisanskruti.com/sample.mp3");
            mediaPlayer.prepare();
            textTotalDuration.setText(milliSecondsToTimer(mediaPlayer.getDuration()));
            Log.d("musicPlayerTimehere", String.valueOf(mediaPlayer.getDuration()));
        }
        catch(Exception e)
        {
            Toast.makeText(this,e.getMessage(),Toast.LENGTH_SHORT).show();
        }
    }

    private Runnable updater=new Runnable() {
        @Override
        public void run() {
            updateSeekBar();
            long currentDuration=mediaPlayer.getCurrentPosition();
            textCurrenTime.setText(milliSecondsToTimer(currentDuration));
        }
    };


    private void updateSeekBar(){
        if(mediaPlayer.isPlaying()){
            playerSeekBar.setProgress((int)(((float) mediaPlayer.getCurrentPosition()/mediaPlayer.getDuration())*100));
            handler.postDelayed(updater,1000);
        }
    }



    private String milliSecondsToTimer(long milliSeconds){
        String timerString="";
        String secondString;
        int hour=(int) (milliSeconds/(1000*60*60));
        int minutes=(int)(milliSeconds%(1000*60*60))/(1000*60);
        int seconds=(int)((milliSeconds%(1000*60*60))%(1000*60)/1000);
        if(hour>0){
            timerString=hour+":";
        }
        if(seconds<10){
            secondString="0"+seconds;
        }
        else {
            secondString=""+seconds;
        }
        timerString=timerString+minutes+":"+secondString;
        return timerString;
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

我尝试了，但这是针对零的，由于 privacy/company 政策，我无法使用第三方库。

请帮忙...

提前感谢您的帮助...！

Answer 1

我尝试了 Whosebug 的多个答案，下面是一些供您参考但没有任何效果 -

所以我分析了.mp3文件属性，发现如果Bit Rate是128kbps那么mediaPlayer.getDuration()总是returns0或者-1.

我知道你可能不相信这就是我录制视频并将其上传到 Youtube 的原因。这是link供您参考。 https://youtu.be/-AKw59eb6nM

对我来说，将 mp3 文件从 128kbps 转换为 320kbps 是解决方案。

Android mediaPlayer.getDuration() return 0 或 -1

Android mediaPlayer.getDuration() return 0 or -1

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android

dropbox

media-player

android-mediaplayer