bmi指数免费计算,BMI指数计算器

BMI指数计算器，用于根据用户的体重、身高和性别来计算身体的质量指数。1.[代码]nqdxtg/pdtdstp>package com.dddpeter.myapp;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.TextView;public class MainActivity extends Activity {Button calculateButton=null;float myBMI=0;RadioGroup groupSex=null;boolean isMan;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);myHeight=(EditText) findViewById(R.id.myHeight);myWeight=(EditText) findViewById(R.id.myWeight);calculateButton=(Button) findViewById(R.id.buttonCalculate);result=(TextView) findViewById(R.id.textViewResult);groupSex=(RadioGroup) findViewById(R.id.radioGroup1);radioButtonMan=(RadioButton) findViewById(R.id.radioMan);radioButtonWoman=(RadioButton) findViewById(R.id.radioWoman);isMan=true;groupSex.setOnCheckedChangeListener(new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(RadioGroup group, int id) {if(id==radioButtonWoman.getId()){isMan=false;}}});calculateButton.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v) {if(myHeight.getText().toString().trim().equals("")){result.setText("必须填写身高(CM)");return;}if(myWeight.getText().toString().trim().equals("")){result.setText("必须填写体重(KG)");return;}int height=Integer.parseInt(myHeight.getText().toString().trim());int weight=Integer.parseInt(myWeight.getText().toString().trim());myBMI=(float) (weight/(Math.pow(height/100.0, 2)));String strResult="";strBuf.append("您的BMI指数为："+myBMI+"，体重");if(isMan){if(myBMI<20){strResult="偏轻";}else if(myBMI>=20 && myBMI<=25){strResult="适中";}else if(myBMI>25 && myBMI<=30){strResult="过重";}else if(myBMI>30 && myBMI<=35){strResult="肥胖";}else{strResult="非常肥胖";}}else{if(myBMI<19){strResult="偏轻";}else if(myBMI>=19 && myBMI<=24){strResult="适中";}else if(myBMI>24 && myBMI<=29){strResult="过重";}else if(myBMI>29 && myBMI<=34){strResult="肥胖";}else{strResult="非常肥胖";}}strBuf.append(strResult);result.setText(strBuf.toString());}});}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.activity_main, menu);return true;}}2.[代码]Layout

android:layout_width="match_parent"android:layout_height="match_parent"android:textAlignment="center"tools:context=".MainActivity" xmlns:android="http://schemas.android.com/apk/res/android">

android:id="@+id/textView1"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_alignParentTop="true"android:layout_marginTop="20dp"android:gravity="center"android:text="@string/app_name"android:textAlignment="center"android:textAppearance="?android:attr/textAppearanceLarge" />

android:id="@+id/tableRow1"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_below="@+id/textView1"android:layout_centerHorizontal="true"android:layout_marginTop="55dp" >

android:id="@+id/textViewMyHeightLable"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/labelHeight"android:textAppearance="?android:attr/textAppearanceMedium" />

android:id="@+id/myHeight"android:layout_width="wrap_content"android:layout_height="wrap_content"android:ems="10"android:inputType="number" >

android:id="@+id/tableRow2"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_below="@+id/tableRow1"android:layout_centerHorizontal="true"android:layout_marginTop="5dp" >

android:id="@+id/textViewMyWeightLable"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/lableWeight"android:textAppearance="?android:attr/textAppearanceMedium" />

android:id="@+id/myWeight"android:layout_width="wrap_content"android:layout_height="wrap_content"android:ems="10"android:inputType="number" >

android:id="@+id/tableRow3"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_below="@+id/tableRow2"android:layout_centerHorizontal="true"android:gravity="left"android:layout_marginTop="10dp">

android:id="@+id/textViewMySexLable"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/labelSex"android:textAppearance="?android:attr/textAppearanceMedium" />

android:id="@+id/radioGroup1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:orientation="horizontal" >

android:id="@+id/radioMan"android:layout_width="wrap_content"android:layout_height="wrap_content"android:checked="true"android:text="@string/labelSexMan" />

android:id="@+id/radioWoman"android:layout_width="wrap_content"android:layout_height="wrap_content"android:checked="false"android:text="@string/labelSexWoman" />

android:id="@+id/tableRow4"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_below="@+id/tableRow3"android:layout_centerHorizontal="true"android:layout_marginTop="30dp"android:gravity="center" >

android:id="@+id/buttonCalculate"android:layout_width="150dp"android:layout_height="wrap_content"android:text="@string/buttonText" />

android:id="@+id/textViewResult"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentLeft="true"android:layout_below="@+id/tableRow4"android:layout_marginTop="20dp"android:textAppearance="?android:attr/textAppearanceLarge" />