除了Android在啓動模式上可以管理程序的方式,這裏我們用代碼也可以做到管理,往下看:
Android頁面遵守 “先進後出,後進先出”原則,也就是 棧(Stack), 那我們直接管理棧,也可以實現效果.
看代碼:
package com.examplee.starintent.utils;
import java.util.Stack;
import android.app.Activity;
import android.app.ActivityManager;
import android.content.Context;
public class AppManager {
private static Stack<Activity> activityStack;
private static AppManager instance;
private AppManager() {
}
/**
* 單一實例
*/
public static AppManager getAppManager() {
if (instance == null) {
instance = new AppManager();
}
return instance;
}
/**
* 添加Activity到堆棧
*/
public void addActivity(Activity activity) {
if (activityStack == null) {
activityStack = new Stack<Activity>();
}
activityStack.add(activity);
}
/**
* 返回所有的Activity
*
* @return
*/
public Stack<Activity> getStackActivity() {
return activityStack;
}
/**
* 獲取當前Activity(堆棧中最後一個壓入的)
*/
public Activity currentActivity() {
Activity activity = activityStack.lastElement();
return activity;
}
/**
* 結束當前Activity(堆棧中最後一個壓入的)
*/
public void finishActivity() {
Activity activity = activityStack.lastElement();
if (activity != null) {
activity.finish();
activity = null;
}
}
/**
* 結束指定的Activity
*/
public void finishActivity(Activity activity) {
if (activity != null) {
activityStack.remove(activity);
activity.finish();
activity = null;
}
}
/**
* 結束指定類名的Activity
*/
public void finishActivity(Class<?> cls) {
for (Activity activity : activityStack) {
if (activity.getClass().equals(cls)) {
finishActivity(activity);
}
}
}
/**
* 結束所有Activity
*/
public void finishAllActivity() {
for (int i = 0, size = activityStack.size(); i < size; i++) {
if (null != activityStack.get(i)) {
activityStack.get(i).finish();
}
}
activityStack.clear();
}
/**
* 退出應用程序
*/
public void AppExit(Context context) {
try {
finishAllActivity();
ActivityManager activityMgr = (ActivityManager) context
.getSystemService(Context.ACTIVITY_SERVICE);
activityMgr.restartPackage(context.getPackageName());
System.exit(0);
} catch (Exception e) {
}
}
}
每一次啓動 新的Activity的時候addActivity() ,把當前this,添加在 Stack<Activity>activityStack;
這樣也可以做到很好的管理。