Android完整退出应用程序完美解决方法

在开发中，一个应用如何干净彻底地退出Android应用程序，方法有非常多。如何干净地关闭所有已打开的Activity? 如何关闭指定的Activity? 如何关闭一类Activity? 这里，我们提出一种通过实现对Application的扩展，实现了一种高效管理Activity，实现Android干净彻底地退出应用程序。

public class MyApplication extends Application {

private static Stack<Activity> activityStack;
private static MyApplication singleton;
@Override
public void onCreate()
{
super.onCreate();
singleton=this;
}
// Returns the application instance
public static MyApplication getInstance() {
return singleton;
}

/**
* add Activity 添加Activity到栈
*/
public void addActivity(Activity activity){
if(activityStack ==null){
activityStack =new Stack<Activity>();
}
activityStack.add(activity);
}
/**
* get current Activity 获取当前Activity（栈中最后一个压入的）
*/
public Activity currentActivity() {
Activity activity = activityStack.lastElement();
return activity;
}
/**
* 结束当前Activity（栈中最后一个压入的）
*/
public void finishActivity() {
Activity activity = activityStack.lastElement();
finishActivity(activity);
}

/**
* 结束指定的Activity
*/
public void finishActivity(Activity activity) {
if (activity != null) {
activityStack.remove(activity);
activity.finish();
activity = null;
}
}

/**
* 结束指定类名的Activity
*/
public void finishActivity(Class<?> cls) {
for (Activity activity : activityStack) {
if (activity.getClass().equals(cls)) {
finishActivity(activity);
}
}
}

/**
* 结束所有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();
}

/**
* 退出应用程序
*/
public void AppExit() {
try {
finishAllActivity();
} catch (Exception e) {
}
}

}

public class BaseActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
//添加Activity到堆栈
MyApplication.getInstance().addActivity(this);
}

@Override
protected void onDestroy(){
super.onDestroy();
//结束Activity&从栈中移除该Activity
MyApplication.getInstance().finishActivity(this);
}

}

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