Android realizes bitmap rotation effect
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Android
Bitmap rotation can also be realized with the help of matrix or canvas.
Set the rotation angle through the postrotate method, then create a rotated bitmap object with the createbitmap method, and finally draw it on the screen with the drawbitmap method, so the rotation operation is realized.
In the following example, the original bitmap and the rotated bitmap are drawn on the screen for comparison.
BitmapView.Java
Source code download: click the open link
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