Tuesday, July 26, 2011

Android - Matrix

Android provides a very neat and nice way to perform image transformation. The class is Matrix.


For example, if you are at a ImageView, you could scale the underlying bitmap image by the following codes

public void scale(){
//define a new matrix
Matrix m = new Matrix();
//double the scale
m.postScale(2.0f, 2.0f);
//set matrix to image
setImageMatrix(m);
}

By doing the above, the bitmap image will be scaled on next draw

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