标准体重测量器

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activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    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="com.text.weight.MainActivity" >    <TextView        android:id="@+id/text1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true"        android:layout_marginTop="58dp"        android:text="@string/word1"        android:textAppearance="?android:attr/textAppearanceLarge"         />    <TextView        android:id="@+id/text2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/text1"        android:layout_marginTop="95dp"        android:text="@string/word2" />    <RadioGroup         android:id="@+id/grop"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignBottom="@+id/text2"        android:layout_centerHorizontal="true"        android:orientation="horizontal"        >    <RadioButton        android:id="@+id/rButton1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/rbmale" />     <RadioButton        android:id="@+id/rButton2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/rbfemale" /></RadioGroup>    <TextView        android:id="@+id/text3"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/text2"        android:layout_marginTop="90dp"        android:text="@string/word3"/>    <EditText        android:id="@+id/text4"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@+id/grop"        android:layout_alignBottom="@+id/text3"        android:hint="@string/input" >    <requestFocus/>    </EditText>       <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:layout_centerHorizontal="true"        android:layout_marginBottom="26dp"        android:text="@string/b3" />    </RelativeLayout>

activity_show.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent" >     <TextView        android:id="@+id/tvshow"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true"        android:layout_marginTop="130dp"        android:text="" /></RelativeLayout>

MainActivity.java

package com.text.weight;import android.app.Activity;import android.content.Intent;import android.os.Bundle;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;public class MainActivity extends Activity{String Sex;    private Button button1;    private EditText test4;    private RadioGroup sex;    private RadioButton choose;protected void onCreate(Bundle savedInstanceState){      super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);test4 = (EditText) findViewById(R.id.text4);sex =(RadioGroup)findViewById(R.id.grop);        sex.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(RadioGroup grop, int checkedID) {            choose=(RadioButton) findViewById(sex.getCheckedRadioButtonId());            Sex=choose.getText().toString();}});        button1 = (Button) findViewById(R.id.button1);button1.setOnClickListener(new ClickHandler());}class ClickHandler implements OnClickListener{public void onClick(View view){Intent intent = new Intent();intent.setClass(getApplicationContext(), ShowActivity.class);Bundle bundle = new Bundle();String High =test4.getText().toString(); bundle.putString("high", High);bundle.putString("sex",Sex);intent.putExtras(bundle);startActivity(intent);}}}

ShowActivity.java

package com.text.weight;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;public class ShowActivity extends Activity {    private TextView tvshow;    float weight;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_show);float weight;Bundle bundle=this.getIntent().getExtras();String sex=bundle.getString("sex");String high=bundle.getString("high");float High=Float.valueOf(high).floatValue();if(sex=="男")weight=(float)((High-80)*0.7);elseweight=(float)((High-70)*0.6);tvshow=(TextView)findViewById(R.id.tvshow);tvshow.setText("你是一位"+sex+"性\n你的身高是"+high+"厘米\n你的标准体重是"+weight+"公斤\n");}}

出现的问题：

数据类型的转换：bundle传送的是string，而需要的是float类型的数据，所以一开始的时候运行出来的结果是身高为0，体重为负数。

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