1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.app.stubs; 18 19 import android.app.Activity; 20 import android.content.pm.ActivityInfo; 21 import java.util.concurrent.CountDownLatch; 22 import java.util.concurrent.TimeUnit; 23 import java.util.concurrent.atomic.AtomicReference; 24 25 import static org.junit.Assert.assertTrue; 26 27 public class OrientationTestUtils { 28 /** 29 * Change the activity's orientation to something different and then switch back. This is used 30 * to trigger {@link Activity#onConfigurationChanged(android.content.res.Configuration)}. 31 * 32 * @param activity whose orientation will be changed and restored 33 */ 34 public static void toggleOrientation(Activity activity) { 35 final int[] orientations = getOrientations(activity); 36 activity.setRequestedOrientation(orientations[1]); 37 activity.setRequestedOrientation(orientations[0]); 38 } 39 40 /** 41 * Switches the device's orientation from landscape to portrait or portrait to landscape. 42 * 43 * @param activity whose orientation will be changed 44 * @return original orientation 45 */ 46 public static void switchOrientation(final Activity activity) { 47 final int[] orientations = getOrientations(activity); 48 activity.setRequestedOrientation(orientations[1]); 49 } 50 51 /** 52 * Returns original orientation and toggled orientation. 53 * @param activity whose orienetaion will be returned 54 * @return The first element is original orientation adn the second element is toggled 55 * orientation. 56 */ 57 private static int[] getOrientations(final Activity activity) { 58 final int originalOrientation = activity.getResources().getConfiguration().orientation; 59 final int newOrientation = originalOrientation == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT 60 ? ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE 61 : ActivityInfo.SCREEN_ORIENTATION_PORTRAIT; 62 return new int[] { originalOrientation, newOrientation }; 63 } 64 65 /** 66 * Observer used in stub activities to wait for some event. 67 */ 68 public static class Observer { 69 private static final int TIMEOUT_SEC = 3; 70 private final AtomicReference<CountDownLatch> mLatch = new AtomicReference(); 71 72 /** 73 * Starts observing event. 74 * The returned CountDownLatch will get activated when onObserved is invoked after this 75 * call. The method cannot be called multiple times unless reset() is invoked. 76 * @return CountDownLatch will get activated when onObserved is invoked after this call. 77 */ 78 public void startObserving() { 79 final CountDownLatch latch = new CountDownLatch(1); 80 assertTrue(mLatch.compareAndSet(null, latch)); 81 } 82 83 /** 84 * Waits until onObserved is invoked. 85 */ 86 public void await() throws InterruptedException { 87 try { 88 assertTrue(mLatch.get().await(TIMEOUT_SEC, TimeUnit.SECONDS)); 89 } finally { 90 mLatch.set(null); 91 } 92 } 93 94 /** 95 * Notifies an event is observed. 96 * If this method is invoked after startObserving, the returned CountDownLatch will get 97 * activated. Otherwise it does nothing. 98 */ 99 public void onObserved() { 100 final CountDownLatch latch = mLatch.get(); 101 if (latch != null) { 102 latch.countDown(); 103 } 104 } 105 } 106 } 107
