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" >

<TextView

android:id="@+id/text1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textSize="20sp"

android:layout_x="50px"

android:layout_y="72px" />

</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;

}

}