Java tutorial
//package com.java2s; //License from project: Apache License import android.graphics.Bitmap; import android.graphics.Matrix; public class Main { /** * Expand the bitmap to the specified scale. * * @param bitmap to expand. * @param scale the expand scale, must be > 1.0. * @return the expanded bitmap. */ public static Bitmap expand(Bitmap bitmap, float scale) { if (scale <= 1.0f) { return bitmap.copy(bitmap.getConfig(), false); } Matrix matrix = new Matrix(); matrix.postScale(scale, scale); return Bitmap.createBitmap(bitmap, 0, 0, (int) (scale * bitmap.getWidth()), (int) (scale * bitmap.getHeight()), matrix, true); } }