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I have a TextureView with a fixed width and height and I want to show a camera preview inside of it. I need to crop the camera preview so that it doesn't look stretched inside my TextureView. How to do the cropping? If I need to use OpenGL, how to tie the Surface Texture to OpenGL and how to do the cropping with OpenGL? public class MyActivity extends Activity implements TextureView.SurfaceTextureListener { private Camera mCamera; private TextureView mTextureView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_options); mTextureView = (TextureView) findViewById(R.id.camera_preview); mTextureView.setSurfaceTextureListener(this); } @Override public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) { mCamera = Camera.open(); try { mCamera.setPreviewTexture(surface); mCamera.startPreview(); } catch (IOException ioe) { // Something bad happened } } @Override public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) { mCamera.stopPreview(); mCamera.release(); return true; } @Override public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) { } @Override public void onSurfaceTextureUpdated(SurfaceTexture surface) { // Invoked every time there's a new Camera preview frame } } Also, after doing the preview correctly, I need to be able to read in real-time the pixels found in the center of the cropped image.

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