Create upside down bitmap with matrix

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To create upside down bitmap with matrix:

     Matrix matrixUpsideDown = new Matrix(); 
     matrixUpsideDown.preScale(1.0f, -1.0f);
     bitmapMaster = Bitmap.createBitmap(
       tempBitmap, 
       0, 
       0, 
       tempBitmap.getWidth(), 
       tempBitmap.getHeight(), 
       matrixUpsideDown, 
       false);

 Refer to last exercise "Create mirror bitmap with matrix" for full example.

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more: Something about processing images in Android

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