Initial commit
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wangcongtao
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package com.mogo.utils;
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import android.annotation.TargetApi;
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import android.app.Activity;
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import android.app.Application;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.os.Build;
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import android.os.Bundle;
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import java.util.ArrayList;
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import java.util.HashMap;
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public class ActivityLifecycleManager {
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private Application mApplication;
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/**
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* 当前出于 Start 状态的 Activity
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*/
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private ArrayList< Activity > mStartedActivities = new ArrayList<>();
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private ArrayList<AppStateListener> mAppStateListeners = new ArrayList<>();
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/**
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* 当前存活的 Activity
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*/
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private HashMap< Activity, ActivityTrace> mAliveActivities = new HashMap<>();
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/**
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* App 是否出于前台
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*/
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private volatile boolean mIsAppActive = false;
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private Activity mCurrentResumedActivity;
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/**
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* Home 键事件广播的接受器
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*/
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private HomeKeyEventReceiver mHomeKeyEventReceiver;
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/**
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* Home 键事件监听者列表
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*/
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private ArrayList<HomeKeyEventListener> mHomeKeyEventListeners = new ArrayList<>();
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private DefActivityLifecycleCallbacks mInnerActivityListener = new DefActivityLifecycleCallbacks() {
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@Override
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public void onActivityStarted( Activity activity) {
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if (mStartedActivities.isEmpty()) {
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mIsAppActive = true;
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notifyAppStateChanged( AppStateListener.ACTIVE);
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}
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mStartedActivities.add(activity);
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ActivityTrace trace = mAliveActivities.get(activity);
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if (trace != null) {
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trace.startCnt++;
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}
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}
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@Override
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public void onActivityStopped( Activity activity) {
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mStartedActivities.remove(activity);
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if (mStartedActivities.isEmpty()) {
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mIsAppActive = false;
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notifyAppStateChanged( AppStateListener.INACTIVE);
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}
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ActivityTrace trace = mAliveActivities.get(activity);
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if (trace != null) {
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trace.stopCnt++;
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}
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}
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@Override
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public void onActivityResumed( Activity activity) {
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mCurrentResumedActivity = activity;
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ActivityTrace trace = mAliveActivities.get(activity);
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if (trace != null) {
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trace.resumeCnt++;
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}
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}
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@Override
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public void onActivityPaused( Activity activity) {
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ActivityTrace trace = mAliveActivities.get(activity);
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if (trace != null) {
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trace.pauseCnt++;
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}
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}
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@Override
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public void onActivityCreated( Activity activity, Bundle savedInstanceState) {
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mAliveActivities.put(activity, new ActivityTrace(activity));
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}
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@Override
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public void onActivityDestroyed( Activity activity) {
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mAliveActivities.remove(activity);
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}
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};
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private ActivityLifecycleManager() {}
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public static ActivityLifecycleManager getInstance() {
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return SingletonHolder.INSTANCE;
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}
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private static class SingletonHolder{
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private static final ActivityLifecycleManager INSTANCE = new ActivityLifecycleManager();
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}
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public void start( Application application) {
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this.mApplication = application;
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registerInnerActivityListener();
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registerHomeKeyEventReceiver();
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}
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public void stop(){
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unregisterActivityLifecycleCallbacks(mInnerActivityListener);
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unregisterHomeKeyEventReceiver();
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}
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/**
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* 注册 Activity 生命周期的回调
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*
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* @param callbacks Activity 生命周期的回调
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*/
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public void registerActivityLifecycleCallbacks( Application.ActivityLifecycleCallbacks callbacks) {
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if (mApplication == null) {
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return;
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}
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if ( Build.VERSION.SDK_INT < Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
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return;
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}
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mApplication.registerActivityLifecycleCallbacks(callbacks);
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}
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/**
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* 取消注册 Activity 生命周期的回调
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*
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* @param callbacks Activity 生命周期的回调
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*/
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public void unregisterActivityLifecycleCallbacks( Application.ActivityLifecycleCallbacks callbacks) {
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if (mApplication == null) {
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return;
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}
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if ( Build.VERSION.SDK_INT < Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
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return;
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}
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mApplication.unregisterActivityLifecycleCallbacks(callbacks);
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}
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/**
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* 应用是否出于前台
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*/
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public boolean isAppActive() {
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return mIsAppActive;
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}
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public Activity getCurrentActivity(){
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return mCurrentResumedActivity;
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}
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/**
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* 添加应用状态的监听
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*/
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public void addAppStateListener(AppStateListener listener) {
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synchronized (mAppStateListeners) {
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mAppStateListeners.add(listener);
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}
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}
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/**
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* 移除应用状态的监听
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*
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* @param listener
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*/
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public void removeAppStateListener(AppStateListener listener) {
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synchronized (mAppStateListeners) {
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mAppStateListeners.remove(listener);
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}
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}
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/**
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* 添加 home 键的事件监听
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*/
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public void addHomeKeyEventListener(HomeKeyEventListener listener) {
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if (listener == null) {
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return;
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}
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synchronized (mHomeKeyEventListeners) {
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mHomeKeyEventListeners.add(listener);
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}
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}
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/**
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* 移除 home 键的事件监听
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*/
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public void removeHomeKeyEventListener(HomeKeyEventListener listener) {
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if (listener == null) {
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return;
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}
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synchronized (mHomeKeyEventListeners) {
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mHomeKeyEventListeners.remove(listener);
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}
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}
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/**
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* 注册Activity生命周期的监听
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*/
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private void registerInnerActivityListener() {
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registerActivityLifecycleCallbacks(mInnerActivityListener);
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}
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private void notifyAppStateChanged(int state) {
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Object[] listeners = collectAppStateListeners();
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if (listeners != null) {
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for (int i = 0; i < listeners.length; i++) {
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((AppStateListener) listeners[i]).onStateChanged(state);
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}
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}
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}
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private Object[] collectAppStateListeners() {
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Object[] listeners = null;
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synchronized (mAppStateListeners) {
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if (mAppStateListeners.size() > 0) {
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listeners = mAppStateListeners.toArray();
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}
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}
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return listeners;
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}
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private Object[] collectHomeKeyEventListeners() {
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Object[] listeners = null;
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synchronized (mHomeKeyEventListeners) {
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if (mHomeKeyEventListeners.size() > 0) {
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listeners = mHomeKeyEventListeners.toArray();
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}
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}
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return listeners;
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}
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private void registerHomeKeyEventReceiver() {
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android.content.IntentFilter filter = new android.content.IntentFilter();
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filter.addAction( Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
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mHomeKeyEventReceiver = new HomeKeyEventReceiver();
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mApplication.registerReceiver(mHomeKeyEventReceiver, filter);
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}
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private void unregisterHomeKeyEventReceiver() {
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mApplication.unregisterReceiver(mHomeKeyEventReceiver);
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}
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private void onHomeKeyPressed() {
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Object[] listeners = collectHomeKeyEventListeners();
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if (listeners != null) {
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for (int i = 0; i < listeners.length; i++) {
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((HomeKeyEventListener) listeners[i]).onHomeKeyPressed();
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}
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}
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}
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@TargetApi( Build.VERSION_CODES.ICE_CREAM_SANDWICH)
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public static abstract class DefActivityLifecycleCallbacks implements Application.ActivityLifecycleCallbacks {
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@Override
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public void onActivityCreated( Activity activity, Bundle savedInstanceState) {}
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@Override
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public void onActivityStarted( Activity activity) {}
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@Override
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public void onActivityResumed( Activity activity) {}
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@Override
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public void onActivityPaused( Activity activity) {}
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@Override
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public void onActivityStopped( Activity activity) {}
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@Override
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public void onActivitySaveInstanceState( Activity activity, Bundle outState) {}
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@Override
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public void onActivityDestroyed( Activity activity) {}
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}
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public interface AppStateListener {
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int INACTIVE = 0;
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int ACTIVE = 1;
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/**
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* App 状态的回调
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*/
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void onStateChanged( int state );
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}
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/**
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* home 键的监听
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*/
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public interface HomeKeyEventListener {
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void onHomeKeyPressed();
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}
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/**
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* Activity 的生命周期调用痕迹
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*/
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static class ActivityTrace {
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Activity activity;
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int resumeCnt;
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int pauseCnt;
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int startCnt;
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int stopCnt;
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ActivityTrace( Activity activity) {
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this.activity = activity;
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}
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}
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private final class HomeKeyEventReceiver extends BroadcastReceiver {
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private final String SYSTEM_DIALOG_REASON_KEY = "reason";
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private final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey";
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@Override
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public void onReceive( Context context, Intent intent) {
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String action = intent.getAction();
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if ( Intent.ACTION_CLOSE_SYSTEM_DIALOGS.equals(action)) {
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String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY);
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if (reason != null && reason.equals(SYSTEM_DIALOG_REASON_HOME_KEY)) {
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onHomeKeyPressed();
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}
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}
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}
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}
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}
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