JetPack开发中使用CameraX完成拍照和拍视频功能_其它综合_

 dependencies { // CameraX 核心库使用 camera2 实现 implementation "androidx.camera:camera-camera2:1.0.0-beta03" // 可以使用CameraView implementation "androidx.camera:camera-view:1.0.0-alpha10" // 可以使用供应商扩展 implementation "androidx.camera:camera-extensions:1.0.0-alpha10" //camerax的生命周期库 implementation "androidx.camera:camera-lifecycle:1.0.0-beta03" }

 Preview preview = new Preview.Builder() //设置宽高比 .setTargetAspectRatio(screenAspectRatio) //设置当前屏幕的旋转 .setTargetRotation(rotation) .build();

 ImageCapture imageCapture = new ImageCapture.Builder() //优化捕获速度，可能降低图片质量 .setCaptureMode(ImageCapture.CAPTURE_MODE_MINIMIZE_LATENCY) //设置宽高比 .setTargetAspectRatio(screenAspectRatio) //设置初始的旋转角度 .setTargetRotation(rotation) .build();

 VideoCapture videoCapture = new VideoCaptureConfig.Builder() //设置当前旋转 .setTargetRotation(rotation) //设置宽高比 .setTargetAspectRatio(screenAspectRatio) //分辨率 //.setTargetResolution(resolution) //视频帧率 越高视频体积越大 .setVideoFrameRate(25) //bit率 越大视频体积越大 .setBitRate(3 * 1024 * 1024) .build();

 //Future表示一个异步的任务，ListenableFuture可以监听这个任务，当任务完成的时候执行回调 ListenableFuture cameraProviderFuture = ProcessCameraProvider.getInstance(this); ProcessCameraProvider cameraProvider = cameraProviderFuture.get(); //重新绑定之前必须先取消绑定 cameraProvider.unbindAll(); Camera camera = cameraProvider.bindToLifecycle(CameraActivity.this, cameraSelector,preview,imageCapture,videoCapture);

 preview.setSurfaceProvider(mPreviewView.createSurfaceProvider(camera .getCameraInfo()));

 //创建图片保存的文件地址 File file = new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES).getAbsolutePath(), System.currentTimeMillis() + ".jpeg"); ImageCapture.OutputFileOptions outputFileOptions = new ImageCapture.OutputFileOptions.Builder(file).build(); mImageCapture.takePicture(outputFileOptions,mExecutorService , new ImageCapture.OnImageSavedCallback() { @Override public void onImageSaved(@NonNull ImageCapture.OutputFileResults outputFileResults) { Uri savedUri = outputFileResults.getSavedUri(); if(savedUri == null){ savedUri = Uri.fromFile(file); } outputFilePath = file.getAbsolutePath(); onFileSaved(savedUri); } @Override public void onError(@NonNull ImageCaptureException exception) { Log.e(TAG, "Photo capture failed: "+exception.getMessage(), exception); } }); //将前面保存的文件添加到媒体中 private void onFileSaved(Uri savedUri) { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) { sendBroadcast(new Intent(android.hardware.Camera.ACTION_NEW_PICTURE, savedUri)); } String mimeTypeFromExtension = MimeTypeMap.getSingleton().getMimeTypeFromExtension(MimeTypeMap .getFileExtensionFromUrl(savedUri.getPath())); MediaScannerConnection.scanFile(getApplicationContext(), new String[]{new File(savedUri.getPath()).getAbsolutePath()}, new String[]{mimeTypeFromExtension}, new MediaScannerConnection.OnScanCompletedListener() { @Override public void onScanCompleted(String path, Uri uri) { Log.d(TAG, "Image capture scanned into media store: $uri"+uri); } }); PreviewActivity.start(this, outputFilePath, !takingPicture); }

 //创建视频保存的文件地址 File file = new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES).getAbsolutePath(), System.currentTimeMillis() + ".mp4"); mVideoCapture.startRecording(file, Executors.newSingleThreadExecutor(), new VideoCapture.OnVideoSavedCallback() { @Override public void onVideoSaved(@NonNull File file) { outputFilePath = file.getAbsolutePath(); onFileSaved(Uri.fromFile(file)); } @Override public void onError(int videoCaptureError, @NonNull String message, @Nullable Throwable cause) { Log.i(TAG,message); } });

 videoCapture.stopRecording();

 public class RecordView extends View implements View.OnLongClickListener, View.OnClickListener { private static final int PROGRESS_INTERVAL = 100; private int mBgColor; private int mStrokeColor; private int mStrokeWidth; private int mDuration; private int mWidth; private int mHeight; private int mRadius; private int mProgressValue; private boolean isRecording; private RectF mArcRectF; private Paint mBgPaint, mProgressPaint; private OnRecordListener mOnRecordListener; private long mStartRecordTime; public void setOnRecordListener(OnRecordListener onRecordListener) { mOnRecordListener = onRecordListener; } public RecordView(Context context) { this(context, null); } public RecordView(Context context, @Nullable AttributeSet attrs) { this(context, attrs, 0); } public RecordView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.RecordView); mBgColor = typedArray.getColor(R.styleable.RecordView_bg_color, Color.WHITE); mStrokeColor = typedArray.getColor(R.styleable.RecordView_stroke_color, Color.RED); mStrokeWidth = typedArray.getDimensionPixelOffset(R.styleable.RecordView_stroke_width, SizeUtils.dp2px(5)); mDuration = typedArray.getInteger(R.styleable.RecordView_duration, 10); mRadius = typedArray.getDimensionPixelOffset(R.styleable.RecordView_radius, SizeUtils.dp2px(40)); typedArray.recycle(); mBgPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mBgPaint.setStyle(Paint.Style.FILL); mBgPaint.setColor(mBgColor); mProgressPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mProgressPaint.setStyle(Paint.Style.STROKE); mProgressPaint.setColor(mStrokeColor); mProgressPaint.setStrokeWidth(mStrokeWidth); setEvent(); } private void setEvent() { Handler handler = new Handler(Looper.getMainLooper()) { @Override public void handleMessage(@NonNull Message msg) { super.handleMessage(msg); mProgressValue++; postInvalidate(); if (mProgressValue < mDuration*10) { sendEmptyMessageDelayed(0, PROGRESS_INTERVAL); } else { finishRecord(); } } }; setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { if(event.getAction() == MotionEvent.ACTION_DOWN){ mStartRecordTime = System.currentTimeMillis(); handler.sendEmptyMessage(0); }else if(event.getAction() == MotionEvent.ACTION_UP){ long duration = System.currentTimeMillis() - mStartRecordTime; //是否大于系统设定的最小长按时间 if(duration > ViewConfiguration.getLongPressTimeout()){ finishRecord(); } handler.removeCallbacksAndMessages(null); isRecording = false; mStartRecordTime = 0; mProgressValue = 0; postInvalidate(); } return false; } }); setOnClickListener(this); setOnLongClickListener(this); } private void finishRecord() { if(mOnRecordListener!=null){ mOnRecordListener.onFinish(); } } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); mWidth = w; mHeight = w; mArcRectF = new RectF(mStrokeWidth / 2f, mStrokeWidth / 2f, mWidth - mStrokeWidth / 2f, mHeight - mStrokeWidth / 2f); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.drawCircle(mWidth / 2f, mHeight / 2f, mRadius, mBgPaint); if (isRecording) { canvas.drawCircle(mWidth / 2f, mHeight / 2f, mRadius/10f*11, mBgPaint); float sweepAngle = 360f * mProgressValue / (mDuration*10); Log.i("sweepAngle",sweepAngle+""); canvas.drawArc(mArcRectF, -90, sweepAngle, false, mProgressPaint); } } @Override public boolean onLongClick(View v) { isRecording = true; if(mOnRecordListener!=null){ mOnRecordListener.onRecordVideo(); } return true; } @Override public void onClick(View v) { if(mOnRecordListener!=null){ mOnRecordListener.onTackPicture(); } } public interface OnRecordListener { void onTackPicture(); void onRecordVideo(); void onFinish(); } }