Android(安卓)activity的回传数据

 1 package com.example.myact3; 2  3 import android.content.Intent; 4 import android.os.Bundle; 5 import android.support.v7.app.ActionBarActivity; 6 import android.view.View; 7 import android.view.View.OnClickListener; 8 import android.widget.Button; 9 import android.widget.TextView;10 /**11  * Android activity的回传数据12  * @author shaobn13  *14  */15 public class MainActivity extends ActionBarActivity {16     private Button button;    17     private TextView tv;18     private static final  int REQUEST = 1;19     @Override20     protected void onCreate(Bundle savedInstanceState) {21         super.onCreate(savedInstanceState);22         setContentView(R.layout.activity_main);23         button = (Button)this.findViewById(R.id.button1);24         tv = (TextView) this.findViewById(R.id.textView1);25         button.setOnClickListener(new OnClickListener() {26             27             @Override28             public void onClick(View arg0) {29                 // TODO Auto-generated method stub30                 Intent intent = new Intent(MainActivity.this,MainActivity2.class);31                 intent.putExtra("text", tv.getText());32                 //此方法发出请求携带自己的自已的请求码，方便回来时验证33                 startActivityForResult(intent,REQUEST);34             }35         });36     }37     //requestCode 请求码，目的是和发出请求的activity的请求码相一致38     //resultCode 响应码，目的是与本activity设置的响应码一致才接收数据。39     //data 第二个页面传递过来的intent对象40     @Override41     protected void onActivityResult(int requestCode, int resultCode, Intent data) {42         // TODO Auto-generated method stub43         super.onActivityResult(requestCode, resultCode, data);44         if(resultCode==2){45             if(requestCode==REQUEST){46                 String string = data.getStringExtra("response");47                 this.tv.setText(string);48             }49         }50     }51     52 }

 1 package com.example.myact3; 2  3 import android.content.Intent; 4 import android.os.Bundle; 5 import android.support.v7.app.ActionBarActivity; 6 import android.view.View; 7 import android.view.View.OnClickListener; 8 import android.widget.Button; 9 import android.widget.TextView;10 11 public class MainActivity2 extends ActionBarActivity {12     private TextView tv;13     private Button button;14     @Override15     protected void onCreate(Bundle savedInstanceState) {16         super.onCreate(savedInstanceState);17         setContentView(R.layout.activity_main_activity2);18         button = (Button) this.findViewById(R.id.button1);19         tv =  (TextView) this.findViewById(R.id.textView1);20         tv.setText("olympic games");21         button.setOnClickListener(new OnClickListener() {22             23             @Override24             public void onClick(View arg0) {25                 // TODO Auto-generated method stub26                 Intent intent = new Intent();27                 intent.putExtra("response", tv.getText());28                 //回传给之前获得焦点的activity29                 setResult(2, intent);30                 //结束声明周期31                 finish();32             }33         });34         35     }36 }

第二个页面的可以new Intent(),那默认使用的就是之前activit的请求码。

转载于:https://www.cnblogs.com/assassin666/p/4797814.html

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