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.Matrix; import android.graphics.RectF; public class Main { /** * Post rotates the matrix and bounds for the given bounds and degrees. */ public static void postRotateMatrix(float degrees, RectF bounds, Matrix matrix) { matrix.postRotate(degrees); matrix.mapRect(bounds); matrix.postTranslate(-bounds.left, -bounds.top); } }