1 /* 2 * Copyright (C) 2009 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 com.android.camera; 18 19 import android.app.Activity; 20 import android.os.Bundle; 21 22 import java.util.ArrayList; 23 24 public class MonitoredActivity extends NoSearchActivity { 25 26 private final ArrayList<LifeCycleListener> mListeners = 27 new ArrayList<LifeCycleListener>(); 28 29 public static interface LifeCycleListener { onActivityCreated(MonitoredActivity activity)30 public void onActivityCreated(MonitoredActivity activity); onActivityDestroyed(MonitoredActivity activity)31 public void onActivityDestroyed(MonitoredActivity activity); onActivityStarted(MonitoredActivity activity)32 public void onActivityStarted(MonitoredActivity activity); onActivityStopped(MonitoredActivity activity)33 public void onActivityStopped(MonitoredActivity activity); 34 } 35 36 public static class LifeCycleAdapter implements LifeCycleListener { onActivityCreated(MonitoredActivity activity)37 public void onActivityCreated(MonitoredActivity activity) { 38 } 39 onActivityDestroyed(MonitoredActivity activity)40 public void onActivityDestroyed(MonitoredActivity activity) { 41 } 42 onActivityStarted(MonitoredActivity activity)43 public void onActivityStarted(MonitoredActivity activity) { 44 } 45 onActivityStopped(MonitoredActivity activity)46 public void onActivityStopped(MonitoredActivity activity) { 47 } 48 } 49 addLifeCycleListener(LifeCycleListener listener)50 public void addLifeCycleListener(LifeCycleListener listener) { 51 if (mListeners.contains(listener)) return; 52 mListeners.add(listener); 53 } 54 removeLifeCycleListener(LifeCycleListener listener)55 public void removeLifeCycleListener(LifeCycleListener listener) { 56 mListeners.remove(listener); 57 } 58 59 @Override onCreate(Bundle savedInstanceState)60 protected void onCreate(Bundle savedInstanceState) { 61 super.onCreate(savedInstanceState); 62 for (LifeCycleListener listener : mListeners) { 63 listener.onActivityCreated(this); 64 } 65 } 66 67 @Override onDestroy()68 protected void onDestroy() { 69 super.onDestroy(); 70 for (LifeCycleListener listener : mListeners) { 71 listener.onActivityDestroyed(this); 72 } 73 } 74 75 @Override onStart()76 protected void onStart() { 77 super.onStart(); 78 for (LifeCycleListener listener : mListeners) { 79 listener.onActivityStarted(this); 80 } 81 } 82 83 @Override onStop()84 protected void onStop() { 85 super.onStop(); 86 for (LifeCycleListener listener : mListeners) { 87 listener.onActivityStopped(this); 88 } 89 } 90 } 91