转自：http://blog.sina.com.cn/s/blog_7309444701014u2d.html

一、不需要返回值的跳转

Intent intent=new Intent();

intent.setClass(目前的acitivy.this, 目标activity.class);

startActivity(intent);

二、需要返回值的跳转

Intent intent=new Intent();

intent.setClass(发出请求的acitivy.this, 目标activity.class);

startActivityForResult(intent, 状态值(int类型));

状态值作为接收目标返回值的验证。目标activity 关闭才能返回发出请求的activity

例如：

1、请求页面

public class MainActivy extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

Intent intent=new Intent();

intent.setClass(MainActivy.this, ReceiveMSG.class);

startActivityForResult(intent, 0);

}

requestCode 接收返回的状态值

resultCode ：RESULT_OK  RESULT_CANCELED 可以自己赋值，按返回键时，系统默认赋值为：RESULT_CANCELED

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

// TODO Auto-generated method stub

super.onActivityResult(requestCode, resultCode, data);

if (requestCode==0) {

if (resultCode==RESULT_OK) {

Toast.makeText(this, "Send SMS RESULT_OK", Toast.LENGTH_SHORT).show();

}else if (resultCode==RESULT_CANCELED) {

Toast.makeText(this, "result cancel", Toast.LENGTH_SHORT).show();

}else {

Toast.makeText(this, resultCode, Toast.LENGTH_SHORT).show();

}

}else {

Toast.makeText(this, "requsetcode not 0", Toast.LENGTH_SHORT).show();

}

}

}

2、接收返回值界面

public class ReceiveMSG extends Activity{

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

ReceiveMSG.this.setResult(RESULT_OK);

this.finish();

}

}