WeightTest
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1.运行效果图
2.实验代码
<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=".FirstActivity" > <TextView android:id="@+id/input" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:layout_marginTop="50dp" android:text="计算你的标准体重" /> <RadioGroup android:id="@+id/sex" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignRight="@+id/input" android:layout_marginLeft="90dp" android:layout_marginTop="140dp" android:orientation="horizontal" > </RadioGroup> <TextView android:id="@+id/sex" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/input" android:layout_marginTop="69dp" android:text="性别：" /> <Button android:id="@+id/btClick" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/height" android:layout_centerHorizontal="true" android:layout_marginTop="46dp" android:onClick="caculate" android:text="计算" /> <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/height" android:layout_alignBottom="@+id/height" android:layout_toRightOf="@+id/sex" android:ems="10" /> <RadioButton android:id="@+id/man" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/sex" android:layout_alignBottom="@+id/sex" android:layout_toLeftOf="@+id/btClick" android:text="男" /> <RadioButton android:id="@+id/woman" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/man" android:layout_alignBottom="@+id/man" android:layout_alignRight="@+id/input" android:text="女" /> <TextView android:id="@+id/height" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/sex" android:layout_centerVertical="true" android:text="身高：" /></RelativeLayout>
package cn.edu.bzu.weighttest;import android.os.Bundle;import android.app.Activity;import android.content.Intent;import android.view.Menu;import android.view.View;import android.widget.RadioButton;import android.widget.TextView;public class FirstActivity extends Activity {private RadioButton man;private RadioButton woman;private TextView height; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_first); man=(RadioButton)findViewById(R.id.man); woman=(RadioButton)findViewById(R.id.woman); height=(TextView)findViewById(R.id.editText1); }public void caculate(View view){String sex;double Height= Double.parseDouble(height.getText().toString());if(man.isChecked())sex=man.getText().toString();elsesex=woman.getText().toString();Intent intent=new Intent();intent.setClass(FirstActivity.this, SecondActivity.class);Bundle bundle=new Bundle();bundle.putString("sex", sex);bundle.putDouble("Height",Height);intent.putExtras(bundle);startActivity(intent);} @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.first, menu); return true; } }
package cn.edu.bzu.weighttest;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.widget.TextView;public class SecondActivity extends Activity {private TextView showtall;String sex;double Height;double weight;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_second);getDate();initViews();bindData();}private void getDate() {Bundle bundle = getIntent().getExtras();sex = bundle.getString("sex");Height = bundle.getDouble("Height");if (sex.equals("男"))weight = (Height - 80) * 0.7;elseweight = (Height - 70) * 0.6;}private void initViews() {showtall = (TextView) findViewById(R.id.showtall);}private void bindData() {showtall.setText("你是一位" + sex + "性" + "\n你的身高是" + Height + "\n你的标准体重是"+ weight + "千克");}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.second, menu);return true;}}
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="cn.edu.bzu.weighttest" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="18" /> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="cn.edu.bzu.weighttest.FirstActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="cn.edu.bzu.weighttest.SecondActivity" android:label="@string/title_activity_second" > </activity> </application></manifest>
3.实验结果和问题
在本次实验中，了解了RadioButton的使用，再写的过程中，有很多要定义的，而且在第一个活动中的布局总是乱。在运行中，效果图中第一个Activity跳不到第二个，就停止了，让同学帮忙看了一下，解决了问题。感觉学到很多，受益匪浅。
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