package com.mm.android.deviceaddmodule.mobilecommon.base;
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import android.app.Activity;
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import java.util.Stack;
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/**
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* <p>
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* activity 栈管理
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* </p>
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*/
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public class ActivityManager {
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private static Stack<Activity> activityStack;
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private static ActivityManager instance;
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private ActivityManager() {
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}
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public static ActivityManager getScreenManager() {
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if (instance == null) {
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instance = new ActivityManager();
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}
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return instance;
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}
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// 退出栈顶Activity
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public void popActivity(Activity activity) {
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if (activity != null) {
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// 在从自定义集合中取出当前Activity时，也进行了Activity的关闭操作
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//activity.finish();
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activityStack.remove(activity);
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activity = null;
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}
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}
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// 获得当前栈顶Activity
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public Activity currentActivity() {
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Activity activity = null;
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try{
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if (activityStack != null && !activityStack.empty()){
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activity = activityStack.lastElement();
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}
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}catch (Exception e){
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return activity;
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}
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return activity;
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}
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// 将当前Activity推入栈中
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public void pushActivity(Activity activity) {
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if (activityStack == null) {
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activityStack = new Stack<>();
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}
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activityStack.add(activity);
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}
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// 退出栈中所有Activity
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public void popAllActivityExceptOne(Class cls) {
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while (true) {
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Activity activity = currentActivity();
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if (activity == null) {
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break;
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}
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if (activity.getClass().equals(cls)) {
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break;
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}
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popActivity(activity);
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}
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}
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}
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