相关疑难解决方法(0)

我一直在努力在Android上制作自定义相机活动,但是当旋转相机时,表面视图的纵横比会变得混乱.

在我的oncreate活动中,我设置了framelayout,它保存了显示摄像机参数的表面视图.

//FrameLayout that will hold the camera preview
        FrameLayout previewHolder = (FrameLayout) findViewById(R.id.camerapreview);

        //Setting camera's preview size to the best preview size
        Size optimalSize = null;
        camera = getCameraInstance();
        double aspectRatio = 0;
        if(camera != null){
            //Setting the camera's aspect ratio
            Camera.Parameters parameters = camera.getParameters();
            List<Size> sizes = parameters.getSupportedPreviewSizes();
            optimalSize = CameraPreview.getOptimalPreviewSize(sizes, getResources().getDisplayMetrics().widthPixels, getResources().getDisplayMetrics().heightPixels);
            aspectRatio = (float)optimalSize.width/optimalSize.height;
        }

        if(optimalSize!= null){
            RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, (int)(getResources().getDisplayMetrics().widthPixels*aspectRatio));
            previewHolder.setLayoutParams(params);
            LayoutParams surfaceParams = new LayoutParams(LayoutParams.MATCH_PARENT, (int)(getResources().getDisplayMetrics().widthPixels*aspectRatio));
            cameraPreview.setLayoutParams(surfaceParams);

        }

        cameraPreview.setCamera(camera);

        //Adding the preview …

我正在尝试使用camera2接口在Android 5.0上获得数字缩放帧.适用于该功能的doc是developer.android.com/camera2/captureRequest

我的应用中使用的表面:

• SurafaceView(1920x1080,16:9宽高比)
• ImageReader(3264x2448,4:3宽高比)

相机的传感器尺寸为3280x2464(4:3宽高比)

我想从传感器获得的作物区域是:

Rect zoomCropPreview = new Rect(1094, 822, 2186, 1642); //(1092x820, 4:3 aspect ratio)

我将此Rect设置为预览请求的参数:

previewRequestBuilder.set(CaptureRequest.SCALER_CROP_REGION, zoomCropPreview);
captureSession.setRepeatingRequest(previewRequestBuilder.build(), null, null);

并采取静止图像:

stillRequestBuilder.set(CaptureRequest.SCALER_CROP_REGION, zoomCropPreview);

captureSession.capture(stillRequestBuilder.build(), new captureListener() , null);

预期成绩:

• Coz裁剪矩形是4:3的比例,然后预览应垂直裁剪(信箱)
• 静止图像应该是精确的裁剪区域.
• 预览图像和静止图像都应位于同一场景点的中心,并且应仅在垂直边缘上有所不同.

真实结果:

• 预览和静止图像指向不同的场景,似乎是垂直移动.查看附加图像.

我究竟做错了什么？