Java tutorial
//package com.java2s; /* * Copyright (C) 2010 The Android Open Source Project * * 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 rotateBitmap(Bitmap source, int rotation, boolean recycle) { if (rotation == 0) return source; int w = source.getWidth(); int h = source.getHeight(); Matrix m = new Matrix(); m.postRotate(rotation); Bitmap bitmap = Bitmap.createBitmap(source, 0, 0, w, h, m, true); if (recycle) source.recycle(); return bitmap; } public static Bitmap rotateBitmap(Bitmap b, int degrees) { if (degrees != 0 && b != null && !b.isRecycled()) { Matrix m = new Matrix(); m.setRotate(degrees, (float) b.getWidth() / 2, (float) b.getHeight() / 2); try { Bitmap b2 = Bitmap.createBitmap(b, 0, 0, b.getWidth(), b.getHeight(), m, true); if (b != b2) { b.recycle(); } b = b2; } catch (OutOfMemoryError ex) { } } return b; } }