Android - Matrix

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

http://developer.android.com/reference/android/graphics/Matrix.html#setTranslate(float, float)

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