android - 如何在录制时获取视频时长-Android

Question

我遇到了一个问题。我想在录制视频时获取视频的持续时间。当它通过代码完成时，我可以得到视频的持续时间

MediaPlayer mp = MediaPlayer.create(mContext, Uri.parse(video));
if(mp == null)
    return -1;
int duration = mp.getDuration();
mp.release();

但我想每次录制视频时都获取持续时间以更新进度条。希望得到您的回复!

Answer 1

   private class PlaybackObserver extends Thread {

        public void run() {
            currentPosition = 0;
            try {
                while (!killObserverThread) {
                    Thread.sleep(1000);

                    currentPosition = (int) mediaPlayer.getCurrentPosition();

                    runOnUiThread(new Runnable() {
                        public void run() {

                                yourProgressBar.setProgress(currentPosition);


                        }
                    });
                }
            } catch (IllegalStateException e) {
                e.printStackTrace();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

   @Override
    protected void onDestroy() {

        super.onDestroy();

        killObserverThread = false;
    }
    @Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();



        if (task == null || !task.isAlive()) {
            task = new PlaybackObserver();
            task.start();
        }

        startPlaying();

    }

为您的 UiThread 添加一个私有(private)类来更新您的搜索栏/进度条。然后从onResume()开始