自定义activity栈

import java.util.Stack;

import android.app.Activity;

public class ScreenManager {

private static Stack<Activity> activityStack;

private static ScreenManager instance;

private ScreenManager() {

}

public static ScreenManager getScreenManager() {

if (instance == null) {

instance = new ScreenManager();

}

return instance;

}

public static void popActivity() {

Activity activity = activityStack.lastElement();

if (activity != null) {

activity.finish();

activity = null;

}

}

// 退出栈顶Activity

public void popActivity(Activity activity) {

if (activity != null) {

activity.finish();

activityStack.remove(activity);

activity = null;

}

}

// 获得当前栈顶Activity

public Activity currentActivity() {

Activity activity = activityStack.lastElement();

return activity;

}

// 将当前Activity推入栈中

public static void pushActivity(Activity activity) {

if (activityStack == null) {

activityStack = new Stack<Activity>();

}

activityStack.add(activity);

}

// 退出栈中所有Activity

public void popAllActivityExceptOne(Class cls) {

while (true) {

Activity activity = currentActivity();

if (activity == null) {

break;

}

if (activity.getClass().equals(cls)) {

break;

}

popActivity(activity);

}

}

}