Java tutorial
//package com.java2s; /* * Copyright (C) 2012 www.amsoft.cn * * 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 * * http://www.apache.org/licenses/LICENSE-2.0 * * 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.Matrix; public class Main { public static Bitmap rotateBitmapTranslate(Bitmap bitmap, float degrees) { Bitmap mBitmap = null; int width; int height; try { Matrix matrix = new Matrix(); if ((degrees / 90) % 2 != 0) { width = bitmap.getWidth(); height = bitmap.getHeight(); } else { width = bitmap.getHeight(); height = bitmap.getWidth(); } int cx = width / 2; int cy = height / 2; matrix.preTranslate(-cx, -cy); matrix.postRotate(degrees); matrix.postTranslate(cx, cy); } catch (Exception e) { e.printStackTrace(); } return mBitmap; } }