怎么在一个Activity中finish另一个Activity

一、问题的提出

有Activity A和Activity B，先要求在Activity B中finish掉Activity A

二、解决方案

1.在 ActivityA 里面设置一个静态的变量instance,初始化为this 在 ActivityB 里面, ActivityA.instance.finish();

  例：Class A extends Activity{

            public static DeviceInfoActivity instance = null;

                       ....

            public void onCreate(Bundle savedInstanceState){

                       instance = this;

                       .....

            }

 

        Class B extends Activity{

               .....

               A.instance.finish();

        }

 

2.可以通过ActivityManager 

   ActivityManager manager = (ActivityManager)getSystemService(ACTIVITY_SERVICE);   

   manager.restartPackage(packageName);