我正在尝试录制视频,并希望显示正在录制的秒数。
我应该怎么做?
public void startRecording(View v){
flipCamera.setVisibility(View.GONE);
captureImage.setVisibility(View.GONE);
String deviceMan = android.os.Build.MANUFACTURER;
this.mediaRecorder = new MediaRecorder();
this.mediaRecorder.setCamera(this.camera);
camera.unlock();
this.mediaRecorder.setCamera(camera);
this.mediaRecorder.setOrientationHint(90);
this.mediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
this.mediaRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
CamcorderProfile camcorderProfile_HQ = CamcorderProfile
.get(CamcorderProfile.QUALITY_480P);
this.mediaRecorder.setProfile(camcorderProfile_HQ);
this.mediaRecorder.setOutputFile(this.initFile().getAbsolutePath());
this.mediaRecorder.setMaxDuration(60000); // Set max duration 60 sec.
this.mediaRecorder.setMaxFileSize(5000000);
this.mediaRecorder.setPreviewDisplay(this.cameraPreview.getHolder()
.getSurface());
this.mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
try {
this.mediaRecorder.prepare();
// start the actual recording
// throws IllegalStateException if not prepared
this.mediaRecorder.start();
Toast.makeText(this, R.string.recording, Toast.LENGTH_SHORT).show();
this.toggleButtons(true);
} catch (Exception e) {
Log.wtf(TAG, "Failed to prepare MediaRecorder", e);
Toast.makeText(this, R.string.cannot_record, Toast.LENGTH_SHORT)
.show();
this.releaseMediaRecorder();
}
}
我对Android很新,所以如果有人可以提供帮助的话。
答案 0 :(得分:12)
您可以使用计时器和处理程序来实现它。在下面的示例中,文本视图用于以00min:00sec格式显示持续时间。我在后台服务中使用它,但你也可以在活动中使用它。
public TextView timerTextView;
private long startHTime = 0L;
private Handler customHandler = new Handler();
long timeInMilliseconds = 0L;
long timeSwapBuff = 0L;
long updatedTime = 0L;
private Runnable updateTimerThread = new Runnable() {
public void run() {
timeInMilliseconds = SystemClock.uptimeMillis() - startHTime;
updatedTime = timeSwapBuff + timeInMilliseconds;
int secs = (int) (updatedTime / 1000);
int mins = secs / 60;
secs = secs % 60;
if (timerTextView != null)
timerTextView.setText("" + String.format("%02d", mins) + ":"
+ String.format("%02d", secs));
customHandler.postDelayed(this, 0);
}
};
开始录制的地方:
......
this.mediaRecorder.start()
startHTime = SystemClock.uptimeMillis();
customHandler.postDelayed(updateTimerThread, 0);
停止录制的地方:
mediaRecorder.stop()
timeSwapBuff += timeInMilliseconds;
customHandler.removeCallbacks(updateTimerThread);
答案 1 :(得分:0)
您也可以使用Rxjava:
声明可观察对象:
mTimeLoader = Observable.defer(() -> Observable.interval(0, AMPLITUDE_UPDATE_INTERVAL, TimeUnit.MILLISECONDS)
.timeInterval()).subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread());
激活:
mTimeLoaderDisposable = mTimeLoader.subscribe(longTimed -> {
mTotalMsRecorded = (int) (longTimed.value() * AMPLITUDE_UPDATE_INTERVAL);}
完成后,只需处理即可。
mTimeLoaderDisposable.dispose()