當我們需要退出,或者某些原因需要關閉所有的 Activty,這裏一個簡單的類可以實現:
package com.layout;
import java.util.LinkedList;
import java.util.List;
import android.app.Activity;
import android.app.Application;
/**
* 結束所有後臺activity
*/
public class SysApplication extends Application {
//運用list來保存們每一個activity是關鍵
private List<Activity> mList = new LinkedList<Activity>();
//爲了實現每次使用該類時不創建新的對象而創建的靜態對象
private static SysApplication instance;
//構造方法
private SysApplication(){}
//實例化一次
public synchronized static SysApplication getInstance(){
if (null == instance) {
instance = new SysApplication();
}
return instance;
}
// add Activity
public void addActivity(Activity activity) {
mList.add(activity);
}
//關閉每一個list內的activity
public void exit() {
try {
for (Activity activity:mList) {
if (activity != null)
activity.finish();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
System.exit(0);
}
}
//殺進程
public void onLowMemory() {
super.onLowMemory();
System.gc();
}
}
-END