Android笔记（26）finish本界面和上一级界面

1.对于简单的两个Activity，在B界面finish掉A界面： 先在A中将自己赋给test_a

public class A_activity extends Activity {    public static A_activity test_a = null;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        //.....        test_a = this;    }}

2.再在B中调用并finish掉test_a

public class B_activity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        A_activity.test_a.finish();//关闭上个界面        finish();//关闭本界面    }}