【移动应用开发技术】Android开发如何实现标准体重计算器功能

【移动应用开发技术】Android开发如何实现标准体重计算器功能

/upload/information/20200623/125/124982.jpg/upload/information/20200623/125/124983.jpg<RelativeLayout

xmlns:tools="/tools"

xmlns:android="/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context=".MainActivity"

>

<TextView

android:id="@+id/textView2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignLeft="@+id/textView1"

android:layout_alignParentTop="true"

android:layout_marginTop="17dp"

android:text="@string/hello_world"

/>

<TextView

android:id="@+id/textView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_alignParentTop="true"

android:layout_marginLeft="18dp"

android:layout_marginTop="68dp"

android:text="@string/sex"

/>

<RadioGroup

android:id="@+id/radioGroup1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignTop="@+id/textView1"

android:layout_marginLeft="25dp"

android:layout_toRightOf="@+id/textView1"

>

<RadioButton

android:id="@+id/radio0"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/sex1"

/>

<RadioButton

android:id="@+id/radio1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/sex2"

/>

</RadioGroup>

<TextView

android:id="@+id/TextView01"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignLeft="@+id/textView1"

android:layout_centerVertical="true"

android:text="@string/high"

/>

<EditText

android:id="@+id/editText1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerVertical="true"

android:layout_toRightOf="@+id/TextView01"

android:ems="10"

android:inputType="number"

>

<requestFocus

/>

</EditText>

<Button

android:id="@+id/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@+id/editText1"

android:layout_marginTop="72dp"

android:layout_toRightOf="@+id/textView2"

android:onClick="ClickHandler"

android:text="@string/calculate"

/>

</RelativeLayout>package

org.wwj.calculate;

import

android.os.Bundle;

import

android.app.Activity;

import

android.view.Menu;

import

android.view.View;

import

android.view.View.OnClickListener;

import

android.widget.Button;

import

android.widget.EditText;

import

android.widget.RadioButton;

import

android.widget.RadioGroup;

import

android.widget.RadioGroup.OnCheckedChangeListener;

import

android.widget.Toast;

public

class

MainActivity

extends

Activity

{

//定义各个组件

private

Button

cal;

private

EditText

high;

private

RadioGroup

sex;

private

RadioButton

sex1;

private

RadioButton

sex2;

private

Double

weight;

String

sex3;

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

//通过findViewById获取对象

cal=(Button)

this.findViewById(R.id.button1);

high=(EditText)

this.findViewById(R.id.editText1);

sex=(RadioGroup)

this.findViewById(R.id.radioGroup1);

sex1=(RadioButton)

this.findViewById(R.id.radio0);

sex2=(RadioButton)

this.findViewById(R.id.radio1);

//设置Button事件监听

cal.setOnClickListener(new

OnClickListener()

{

public

void

onClick(View

v)

{

/*设置事件监听*/

sex.setOnCheckedChangeListener(new

OnCheckedChangeListener()

{

@Override

public

void

onCheckedChanged(RadioGroup

group,

int

checkedId)

{

//事件处理

if(checkedId==sex1.getId()){

weight=(Double.parseDouble(high.getText().toString())

-

80)

*

0.7;

sex3="男性";

}else

if(checkedId==sex2.getId()){

weight=(Double.parseDouble(high.getText().toString())

-

70)

*

0.6;

sex3="女性";

}

}

});

/*Toast显示内容*/

Toast.makeText(MainActivity.this,

"你是一位"+sex3+"\n"

+"你的身高是"+high.get