建立一個自己專案的Activity管理類（方法一 二均可用）記得點贊哦！謝謝

方法一

public class ActivityManager { private static Stack<Activity> activityStack; private static ActivityManager instance; private ActivityManager() { } public static ActivityManager getScreenManager() { if (instance == null) { instance = new ActivityManager(); } return instance; }

   /**
    * 獲取當前Activity個數
    */

public int getActivitySize() { if (activityStack != null && !activityStack.empty()) { return activityStack.size(); } return 0; } /** * 退出棧頂Activity */public void popActivity(Activity activity) { if (activity != null) { activity.finish(); activityStack.remove(activity); activity = null; } } /** * 獲得當前棧頂Activity 先進後出原則 */public Activity currentActivity() { Activity activity = null; if (activityStack != null && !activityStack.empty()) activity = activityStack.lastElement(); return activity; } /** * 將當前Activity壓入棧中 */public void pushActivity(Activity activity) { if (activityStack == null) { activityStack = new Stack<Activity>(); } activityStack.add(activity); } /** * 退出棧中class上面的所有Activity。 */public void popAllActivityExceptOne(Class cls) { while (true) { Activity activity = currentActivity(); if (activity == null) { break; } if (activity.getClass().equals(cls)) { break; } popActivity(activity); } } /** * 退出棧中除了包名外的所有Activity， */public void popAllActivityExceptPackageName(String packageName) { for (Activity activity : activityStack) { if (activity != null) { String name = activity.getComponentName().getPackageName(); if (!name.contains(packageName)) { popActivity(activity); } } } } /** * 退出棧中所有Activity */public void popAllActivity() { while (true) { Activity activity = currentActivity(); if (activity == null) { break; } popActivity(activity); } }}

方法二
或者用簡單的方法實現（清晰易懂操作）

public class ActivitysManager {private static List<Activity> activityList;
    private static ActivitysManager instance;

    private ActivitysManager() {
    }

    public static ActivitysManager getActivitysManagerInstance() {
        if (instance == null) {
            instance = new ActivitysManager();
        }
        return instance;
    }

    //退出棧頂Activity
public void popActivity(Activity activity) {
        if (activity != null) {activityList.remove(activity);
            activity = null;
        }
    }    //將當前Activity壓入棧中
public void pushActivity(Activity activity) {
        if (activityList == null) {
            activityList = new LinkedList<Activity>();
        }
        activityList.add(activity);
    }

    //退出棧中所有Activity
public void exitApp(){
        for(Activity activity:activityList){
            if(!activity.isFinishing()){
                activity.finish();
            }
        }
        int id=android.os.Process.myPid();
        if(id!=0){
            android.os.Process.killProcess(id);
        }
    }}