方法一:
package com.example.startotherapp;
import java.util.LinkedList;import java.util.List;
import android.app.Activity;
import android.app.Application;
public class MyApplication extends Application{
private List<Activity> mList = new LinkedList<Activity>();
private static MyApplication instance;
private MyApplication() {
}
public synchronized static MyApplication getInstance() {
if (null == instance) {
instance = new MyApplication();
}
return instance;
}
// add Activity
public void addActivity(Activity activity) {
mList.add(activity);
}
//退出整個應用時調用
public void exit() {try {
for (Activity activity : mList) {
if (activity != null)
activity.finish();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
System.exit(0);
}
}
/**
* 內存不足時候使用
*/
public void onLowMemory() {
super.onLowMemory();
System.gc();
}
}
註釋: 原理在創建每個activity的時候我們需要MyApplication.getIntent().add(this);這裏用到的技術有單例和一個list收集每一個activity。
方法二:
Intent startMain = new Intent(Intent.ACTION_MAIN);
startMain.addCategory(Intent.CATEGORY_HOME);
startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(startMain);
System.exit(0);