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Activity18  * @author 19  * @since 2011-3-820  */21 public class HomeActivity extends Activity {22 23     @Override24     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             @Override33             public void onClick(View v) {34                 // TODO Auto-generated method stub35                 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 exception61                     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 stub71             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Activity19  * @author 20  * @since 2011-3-821  */22 public class MoreActivity extends Activity {23     24     private Intent intent;25     private Bundle budle;26     @Override27     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             @Override52             public void onClick(View v) {53                 // TODO Auto-generated method stub54                 //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 }