Java tutorial
//package com.java2s; /** * Copyright 2014 Zhenguo Jin * <p/> * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * <p/> * http://www.apache.org/licenses/LICENSE-2.0 * <p/> * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import android.graphics.Bitmap; import android.graphics.Bitmap.Config; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.PorterDuff.Mode; import android.graphics.PorterDuffXfermode; public class Main { public static Bitmap combineImages(Bitmap bgd, Bitmap fg) { Bitmap bmp; int width = bgd.getWidth() > fg.getWidth() ? bgd.getWidth() : fg.getWidth(); int height = bgd.getHeight() > fg.getHeight() ? bgd.getHeight() : fg.getHeight(); bmp = Bitmap.createBitmap(width, height, Config.ARGB_8888); Paint paint = new Paint(); paint.setXfermode(new PorterDuffXfermode(Mode.SRC_ATOP)); Canvas canvas = new Canvas(bmp); canvas.drawBitmap(bgd, 0, 0, null); canvas.drawBitmap(fg, 0, 0, paint); return bmp; } }