小编sha*_*oid的帖子

我一直在研究一个简单的Android应用程序,旨在将Android Camera2 API管道中的流式相机帧传递给我的算法.我已经使用Android Camera1 API忠实地做了几个应用程序,但即使在检查(Google文档,论坛)以确认正确编码之后,我也无法从onImageAvailable()中的ImageReader捕获任何真实数据.请注意以下相关代码:

1. 设置ImageReaders:

   private void setUpCameraOutputs(int width, int height) {
   
   [....code....]
   
   mImageReader = ImageReader.newInstance(smallestJPEG.getWidth(), 
                                          smallestJPEG.getHeight(),
                                          ImageFormat.JPEG, /*maxImages*/2);
   // mImageReader.setOnImageAvailableListener(mOnImageAvailableListener, null);
   mPreviewImageReader = ImageReader.newInstance(smallest.getWidth(), 
                                                 smallest.getHeight(), 
                                                 ImageFormat.YUV_420_888, 2);
   mPreviewImageReader.setOnImageAvailableListener(mOnPreviewImageAvailableListener,
                                                   mBackgroundHandler);
   
   [....code....]
   
   }
   

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2. 设置CaptureSession:

   private void createCameraPreviewSession() {
   try {
       //Create Texture from Screen's TextureView
       SurfaceTexture texture = mTextureView.getSurfaceTexture();
   
       assert texture != null;
   
       //Configure Default Buffer Size
       texture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
   
       //Create Output Surface from Texture
       Surface surface = new Surface(texture);
   
       // Set up a CaptureRequest.Builder with the output Surface.
       mPreviewRequestBuilder
               = …

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