Intent ,Bundle 组件 两个Activity 互相传值

 1 /**
 2  * 
 3  */
 4 package com.flysnow.sina.weibo;
 5 
 6 import android.app.Activity;
 7 import android.content.Intent;
 8 import android.os.Bundle;
 9 import android.view.View;
10 import android.widget.Button;
11 import android.widget.EditText;
12 import android.widget.RadioButton;
13 import android.widget.TextView;
14 import android.widget.Toast;
15 
16 /**
17  * 首页Activity
18  * @author 
19  * @since 2011-3-8
20  */
21 public class HomeActivity extends Activity {
22 
23     @Override
24     protected void onCreate(Bundle savedInstanceState) {
25         super.onCreate(savedInstanceState);
26         setContentView(R.layout.login_table);     
27         
28         Button login= (Button) findViewById(R.id.login);
29         
30         login.setOnClickListener(new Button.OnClickListener() {
31 
32             @Override
33             public void onClick(View v) {
34                 // TODO Auto-generated method stub
35                 try {
36                     EditText u = (EditText) findViewById(R.id.username);
37                     EditText p = (EditText) findViewById(R.id.password);
38                     EditText h = (EditText) findViewById(R.id.height);
39                     RadioButton s= (RadioButton) findViewById(R.id.sex_man);
40                     String username=u.toString();
41                     String passwd=p.toString();
42                     double  height= Double.parseDouble(h.getText().toString());  //转换为double类型 
43                     String sex;
44                     if(s.isChecked()){
45                         sex ="男性";
46                     }else{
47                         
48                         sex ="女性";
49                     }
50                     Intent intent=new Intent();
51                     intent.setClass(HomeActivity.this, MoreActivity.class);
52                     Bundle bu=new Bundle();　　　　　　　　// 这个组件 存值
53                     bu.putString("username", username);
54                     bu.putString("passwd", passwd);
55                     bu.putString("sex", sex);
56                     bu.putDouble("height", height);
57                     intent.putExtras(bu);　　　　//放到 intent 里面  然后 传出去
58                     startActivity(intent);
59                 }catch(Exception e){
60                     // TODO: handle exception
61                     Toast.makeText(HomeActivity.this,"errorrrrr", Toast.LENGTH_LONG).show();
62                 }
63                 
64             }});
65         
66     };
67     
68                                         //从传过去的页面返回数据 的方法
69     protected void onActivityResult(int requestCode, int resultCode,Intent data) {
70             // TODO Auto-generated method stub
71             super.onActivityResult(requestCode, resultCode, data);
72             RadioButton radiobutton_Man= (RadioButton) findViewById(R.id.sex_man);
73             RadioButton radiobutton_Woman= (RadioButton) findViewById(R.id.sex_woman);
74             EditText edit_height = (EditText) findViewById(R.id.height);
75         switch (resultCode) {
76             case RESULT_OK:
77             /* 取得来自Activity2 的数据，并显示于画面上*/
78             Bundle bunde = data.getExtras();
79             String sex = bunde.getString("sex");
80             double height = bunde.getDouble("height");
81             edit_height.setText("" + height);
82             if (sex.equals("男性")) {
83             radiobutton_Man.setChecked(true);
84             } else {
85             radiobutton_Woman.setChecked(true);
86             } 
87             break;
88             
89             default:
90             break;
91             }
92     }
93     
94     
95 }

 1 /**
 2  * 
 3  */
 4 package com.flysnow.sina.weibo;
 5 
 6 
 7 import java.text.DecimalFormat;
 8 import java.text.NumberFormat;
 9 
10 import android.app.Activity;
11 import android.content.Intent;
12 import android.os.Bundle;
13 import android.view.View;
14 import android.widget.Button;
15 import android.widget.TextView;
16 
17 /**
18  * 更多Activity
19  * @author 
20  * @since 2011-3-8
21  */
22 public class MoreActivity extends Activity {
23     
24     private Intent intent;
25     private Bundle budle;
26     @Override
27     protected void onCreate(Bundle savedInstanceState) {
28         super.onCreate(savedInstanceState);
29         
30         setContentView(R.layout.layout2);    
31         
32         TextView a=(TextView) findViewById(R.id.textView111);
33         
34         intent= this.getIntent();  //接受的数据
35         budle =intent.getExtras();
36         
37         String sex =budle.getString("sex");
38         double height = budle.getDouble("height");
39         String tizhong = this.getWeight(sex, height);
40         
41         /*使用CharSequence类getString()方法从XML中获取String*/
42         CharSequence string2=getString(R.string.app_name);
43         
44         
45         String z = "("+string2+")你是一个"+sex+",你的身高为"+height+"你的标准体重为"+tizhong;
46         a.setText(z);
47         
48         Button back= (Button) findViewById(R.id.back);        //返回事件
49         back.setOnClickListener(new Button.OnClickListener() {
50             
51             @Override
52             public void onClick(View v) {
53                 // TODO Auto-generated method stub
54                 //返回result 回上一个activity 
55                 MoreActivity.this.setResult(RESULT_OK, intent);
56                 //结束这个activity 
57                 MoreActivity.this.finish();
58             }
59         });
60         
61     }
62     
63     /* 四舍五入的method */
64     private String format(double num) {
65         NumberFormat formatter = new DecimalFormat("0.00");
66         String s = formatter.format(num);
67         return s;
68     }
69     
70     private String getWeight(String sex, double height) {
71         String weight = "";
72         if (sex.equals("男性")) {
73         weight = format((height - 80) * 0.7);
74         } else {
75         weight = format((height - 70) * 0.6);
76         } 
77         
78         return weight;
79     }
80     
81 }