如何设置android camera2预览和捕获大小? [英] How to set android camera2 preview and capture size?

问题描述

我正在使用SurfaceView来显示我捕获的预览.我想使用width = 1080，height = 1920进行预览.在哪里可以设置预览的大小?

I am using a SurfaceView to show the preview I capture. I want to use width=1080,height=1920 for the preview. Where can I set the size of the preview?

我用谷歌搜索了一个答案，但它们都是针对相机版本一的.我正在使用android.hardware.camera2.

I googled for an answer, but they are all for camera version one. I am using the android.hardware.camera2.

private void takePreview() {
    try {
        final CaptureRequest.Builder previewRequestBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
        previewRequestBuilder.addTarget(mSurfaceHolder.getSurface());
        mCameraDevice.createCaptureSession(Arrays.asList(mSurfaceHolder.getSurface(), mImageReader.getSurface()), new CameraCaptureSession.StateCallback() // ③
        {
            @Override
            public void onConfigured(CameraCaptureSession cameraCaptureSession) {
                if (null == mCameraDevice) return;
                mCameraCaptureSession = cameraCaptureSession;
                try {
                    previewRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
                    previewRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON_ALWAYS_FLASH);
                    previewRequestBuilder.set(CaptureRequest.JPEG_THUMBNAIL_SIZE, new Size(1080,1920));

                    CaptureRequest previewRequest = previewRequestBuilder.build();
                    mCameraCaptureSession.setRepeatingRequest(previewRequest, null, childHandler);
                } catch (CameraAccessException e) {
                    Log.e("takePreview","onConfigured(CameraCaptureSession cameraCaptureSession)",e);
                }
            }
            @Override
            public void onConfigureFailed(CameraCaptureSession cameraCaptureSession) {
                Log.e("takePreview","onConfigureFailed");
            }
        }, childHandler);
    } catch (CameraAccessException e) {
        Log.e("takePreview","CameraAccessException");
    }
}

推荐答案

如对

用于绘制到SurfaceView:创建SurfaceView的Surface后，使用

For drawing to a SurfaceView: Once the SurfaceView's Surface is created, set the size of the Surface with setFixedSize(int, int) to be one of the sizes returned by getOutputSizes(SurfaceHolder.class) and then obtain the Surface by calling getSurface(). If the size is not set by the application, it will be rounded to the nearest supported size less than 1080p, by the camera device.

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