android中的bundle传送数据

activity1.xml

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/widget0"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<TextView
android:id="@+id/title"
android:layout_width="243px"
android:layout_height="29px"
android:text="@string/title"
android:textSize="24sp"
android:layout_x="36px"
android:layout_y="32px" />
<TextView
android:id="@+id/text1"
android:layout_width="wrap_content"
android:layout_height="37px"
android:text="@string/text1"
android:textSize="18sp"
android:layout_x="40px"
android:layout_y="156px" />
<TextView
android:id="@+id/text2"
android:layout_width="wrap_content"
android:layout_height="29px"
android:text="@string/text2"
android:textSize="18sp"
android:layout_x="40px"
android:layout_y="102px" />
<TextView
android:id="@+id/text3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="cm"
android:textSize="18sp"
android:layout_x="231px"
android:layout_y="157px" />
<Button
android:id="@+id/button1"
android:layout_width="70px"
android:layout_height="48px"
android:layout_x="130px"
android:layout_y="232px"
android:text="计算" />

<RadioGroup
android:id="@+id/sex"
android:layout_width="300px"
android:layout_height="100px"
xmlns:android="http://schemax.android.com/apk/res/android"
android:layout_x="97px"
android:layout_y="98px"
android:orientation="horizontal"
android:checkedButton="@+id/sex1">
<RadioButton
android:id="@+id/sex1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="男的" />
<RadioButton
android:id="@+id/sex2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="女的" />
</RadioGroup>

<EditText
android:id="@+id/height"
android:layout_width="130px"
android:layout_height="wrap_content"
android:textSize="18sp"
android:layout_x="96px"
android:layout_y="142px"
android:numeric="decimal">
</EditText>"

</AbsoluteLayout>

activity2.xml

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

</AbsoluteLayout>

Activity1.java

package com.bund;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;

public class Activity1 extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity1);

Button b1 = (Button) findViewById(R.id.button1);
b1.setOnClickListener(new Button.OnClickListener(){

@Override
public void onClick(View v) {
//取得输入的身高
EditText et = (EditText) findViewById(R.id.height);
double height = Double.parseDouble(et.getText().toString());
//取得选择的性别
String sex = "";
RadioButton rb1 = (RadioButton) findViewById(R.id.sex1);
if(rb1.isChecked()){
sex = "M";
}else{
sex = "F";
}

Intent intent = new Intent();
intent.setClass(Activity1.this, Activity2.class);

//new 一个Bundle对象，并将要传递的数据传入
Bundle bundle = new Bundle();
bundle.putDouble("height", height);
bundle.putString("sex", sex);

//将Bundle对象assign给Intent
intent.putExtras(bundle);

//调用Activity2
startActivity(intent);
}

});
}
}

activity2.java

package com.bund;

import java.text.DecimalFormat;
import java.text.NumberFormat;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class Activity2 extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);

//加载activity2.xml
setContentView(R.layout.activity2);

//得Intent中的Bundle对象
Bundle bunde = this.getIntent().getExtras();

//取得Bundle对象中的数据
String sex = bunde.getString("sex");
double height = bunde.getDouble("height");

//判断性别
String sexText = "";
if( sex.equals("M") ){
sexText = "男性";
}else{
sexText = "女性";
}

//取得标准体重
String weight = this.getWeight(sex, height);

//设置输入的文字
TextView tv1 = (TextView) findViewById(R.id.text1);
tv1.setText("你是一位" + sexText + "\n你的身高是" + height + "厘米\n你的标准体重是"+weight+"公斤");
}

//四舍五入
private String format(double num){
NumberFormat formatter = new DecimalFormat("0.00");
String s = formatter.format(num);
return s;
}

//以findViewById()取得Button对象，并添加onClickListener
private String getWeight(String sex,double height){
String weight = "";
if(sex.equals("M")){
weight = format((height-80)*0.7);
}else{
weight = format((height-70)*0.6);
}
return weight;
}
}

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