Android – TextureView getbitmap() ignores settransform

I am using TextureView for camerapreview. Due to the difference between display ratio and preview ratio, I use textureview.settransform (matrix) in onsurfacetextureavailable(). When I need a screenshot of TextureView, I use TextureView. Getbitmap(), but in some smartphone models, getbitmap() ignores the scaling of preview. Why?

resolvent:

I found the same problem when I needed to post process the camera preview before display

It seems that the original camera capture is what appears in getbitmap (), not the converted view of the final display

I solved the following problem. It only applies the same transformation after pulling out bitmap:

TextureView textureView = (TextureView) findViewById( R.id.texture );
Matrix m = new Matrix();
// Do matrix creation here.
textureView.setTransform( m );

// When you need to get the Bitmap
Bitmap bitmap = textureView.getBitmap();
bitmap = Bitmap.createBitmap( bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), textureView.getTransform( null ), true );
@H_404_15@
我注意到Bitmap没有像在原始视图中那样被裁剪.在我的例子中,TextureView已经裁剪了图像的顶部和底部,而Bitmap仍然是全尺寸的.基本上,默认情况下,看起来TextureView使用等效的“centerCrop”来显示原始源.我将相应的ImageView设置为使用android：scaleType =“centerCrop”并且视图具有相同的方面.
当然,这意味着我正在处理更多我真正需要的图像,但是我还没有弄清楚如何在处理之前完全裁剪出TextureView正在做的事情.


          
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