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请求码和结果码

请求码和结果码

一、简介

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请求码:

例如请求页面有多个button,根据请求码就知道是哪个button在请求

结果码:

多个请求可以打开多个页面,根据结果码就知道我们打开的是哪个界面

 

请求码是用来标识请求源的,结果码是用来标识结果源的。

 

二、具体步骤

这里演示结果码的

1、界面1里面的结果码是100

setResult(100, intent);

2、界面2里面的结果码是200

setResult(200, intent);

3、在主界面的 onActivityResult方法中根据结果码判断数据来源于哪个页面

switch (resultCode) {
case 100:
  et_phoneNumber.setText(bundle.getString("phoneNumber"));
  break;
case 200:
  et_phoneNumber2.setText(bundle.getString("phoneNumber2"));
  break;
default:
  break;
}

 

 

三、代码实例

下面的代码时返回值,实质和用intent传值是一样的,都是getExtras和putExtras

这里是测试结果码,请求码的测试在代码的注释里面有

结果图:

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打开第一个按钮进入一个界面,打开第二个按钮进入另外一个界面

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代码:

activityReturnData.MainActivity

 1 package activityReturnData;
 2 
 3 
 4 
 5 
 6 import com.example.activityReturnData.R;
 7 
 8 import android.app.Activity;
 9 import android.content.Intent;
10 import android.os.Bundle;
11 import android.view.View;
12 import android.view.View.OnClickListener;
13 import android.widget.Button;
14 import android.widget.EditText;
15 
16 
17 
18 public class MainActivity extends Activity{
19     private Button btn_chooseContacter;//创建一个button对象
20     private EditText et_phoneNumber;
21     private Button btn_chooseContacter2;//创建一个button对象
22     private EditText et_phoneNumber2;
23      protected void onCreate(Bundle savedInstanceState) {
24             super.onCreate(savedInstanceState);//父类操作
25             setContentView(R.layout.activity_main);//引入名为activity_main的界面
26             btn_chooseContacter=(Button) findViewById(R.id.btn_chooseContacter);//找id为btn_openActivity的button
27             et_phoneNumber=(EditText) findViewById(R.id.et_phoneNum);
28             btn_chooseContacter.setOnClickListener(new OnClickListener() {//设置button点击监听
29                 
30                 @Override
31                 public void onClick(View v) {//onclick事件
32                     // TODO Auto-generated method stub
33                     Intent intent=new Intent(MainActivity.this,Activity01.class);//初始化intent
34                     //请求码:resultCode
35                     startActivityForResult(intent, 1);
36                 }
37             });
38             
39             
40             btn_chooseContacter2=(Button) findViewById(R.id.btn_chooseContacter2);//找id为btn_openActivity的button
41             et_phoneNumber2=(EditText) findViewById(R.id.et_phoneNum2);
42             btn_chooseContacter2.setOnClickListener(new OnClickListener() {//设置button点击监听
43                 
44                 @Override
45                 public void onClick(View v) {//onclick事件
46                     // TODO Auto-generated method stub
47                     Intent intent=new Intent(MainActivity.this,Activity02.class);//初始化intent
48                     //请求码:resultCode
49                     startActivityForResult(intent, 2);
50                 }
51             });
52             
53         }
54     /*
55      * Activity01调用完finish()方法销毁之后,就会调用MainActivity的onActivityResult方法
56      * 因为Activity01完成后会返回调用它的方法
57      *  (non-Javadoc)
58      * @see android.app.Activity#onActivityResult(int, int, android.content.Intent)
59      */
60      @Override
61     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
62         // TODO Auto-generated method stub
63         super.onActivityResult(requestCode, resultCode, data);
64         //就是如果没有传值回来的情况,直接return就ok了
65         if(data=http://www.mamicode.com/=null) return;
66         Bundle bundle=data.getExtras();
67         String phoneNumber=bundle.getString("phoneNumber");
68         
69 //        switch (requestCode) {
70 //        case 1:
71 //            et_phoneNumber.setText(phoneNumber);
72 //            break;
73 //        case 2:
74 //            et_phoneNumber2.setText(phoneNumber);
75 //            break;    
76 //        default:
77 //            break;
78 //        }
79         
80         switch (resultCode) {
81         case 100:
82             et_phoneNumber.setText(bundle.getString("phoneNumber"));
83             break;
84         case 200:
85             et_phoneNumber2.setText(bundle.getString("phoneNumber2"));
86             break;    
87         default:
88             break;
89         }
90 
91     }
92 }

activityReturnData.Activity01

 1 package activityReturnData;
 2 
 3 
 4 import com.example.activityReturnData.R;
 5 
 6 import android.app.Activity;
 7 import android.content.Intent;
 8 import android.os.Bundle;
 9 import android.view.View;
10 import android.view.View.OnClickListener;
11 import android.widget.TextView;
12 
13 public class Activity01 extends Activity{
14     private TextView tv_phoneNum;
15     @Override
16     protected void onCreate(Bundle savedInstanceState) {
17         // TODO Auto-generated method stub
18         super.onCreate(savedInstanceState);
19         setContentView(R.layout.activity01);
20         tv_phoneNum=(TextView) findViewById(R.id.tv_phoneNum);
21         tv_phoneNum.setOnClickListener(new OnClickListener() {
22             
23             @Override
24             public void onClick(View v) {
25                 // TODO Auto-generated method stub
26                 Intent intent=new Intent();
27                 intent.putExtra("phoneNumber",tv_phoneNum.getText());    
28                 //resultCode,结果码
29                 setResult(100, intent);
30                 finish();
31             }
32         });
33     }
34 }

activityReturnData.Activity02

 1 package activityReturnData;
 2 
 3 
 4 import com.example.activityReturnData.R;
 5 
 6 import android.app.Activity;
 7 import android.content.Intent;
 8 import android.os.Bundle;
 9 import android.view.View;
10 import android.view.View.OnClickListener;
11 import android.widget.TextView;
12 
13 public class Activity02 extends Activity{
14     private TextView tv_phoneNum2;
15     @Override
16     protected void onCreate(Bundle savedInstanceState) {
17         // TODO Auto-generated method stub
18         super.onCreate(savedInstanceState);
19         setContentView(R.layout.activity02);
20         tv_phoneNum2=(TextView) findViewById(R.id.tv_phoneNum2);
21         tv_phoneNum2.setOnClickListener(new OnClickListener() {
22             
23             @Override
24             public void onClick(View v) {
25                 // TODO Auto-generated method stub
26                 Intent intent=new Intent();
27                 intent.putExtra("phoneNumber2",tv_phoneNum2.getText());    
28                 //resultCode,结果码
29                 setResult(200, intent);
30                 finish();
31             }
32         });
33     }
34 }

/activityReturnData/AndroidManifest.xml

 1 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 2     package="com.example.activityReturnData"
 3     android:versionCode="1"
 4     android:versionName="1.0" >
 5 
 6     <uses-sdk
 7         android:minSdkVersion="8"
 8         android:targetSdkVersion="19" />
 9 
10     <application
11         android:allowBackup="true"
12         android:icon="@drawable/ic_launcher"
13         android:label="@string/app_name"
14         android:theme="@style/AppTheme" >
15         <activity
16             android:name="activityReturnData.MainActivity"
17             android:label="@string/app_name" >
18             <intent-filter>
19                 <action android:name="android.intent.action.MAIN" />
20 
21                 <category android:name="android.intent.category.LAUNCHER" />
22             </intent-filter>
23         </activity>
24         <activity android:name="activityReturnData.Activity01" android:exported="true"></activity>
25         <activity android:name="activityReturnData.Activity02" android:exported="true"></activity>
26     </application>
27 
28 </manifest>

/activityReturnData/res/layout/activity_main.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical" >
 6 
 7     <EditText
 8         android:id="@+id/et_phoneNum"
 9         android:layout_width="match_parent"
10         android:layout_height="wrap_content"
11         android:ems="10" >
12 
13         <requestFocus />
14     </EditText>
15 
16     <Button
17         android:id="@+id/btn_chooseContacter"
18         android:layout_width="318dp"
19         android:layout_height="50dp"
20         android:text="@string/btn_chooseContacter" />
21     
22      <EditText
23         android:id="@+id/et_phoneNum2"
24         android:layout_width="match_parent"
25         android:layout_height="wrap_content"
26         android:ems="10" >
27 
28         <requestFocus />
29     </EditText>
30 
31     <Button
32         android:id="@+id/btn_chooseContacter2"
33         android:layout_width="318dp"
34         android:layout_height="50dp"
35         android:text="@string/btn_chooseContacter" />
36 
37 </LinearLayout>

 

请求码和结果码