单选按钮（作业）--MarsChen Android 开发教程学习笔记

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目标：

实现如图所示布局，当选择A 选项的时候C 选项能同时被选中，取消A 时C也同时取消，B、D 选项关系也如此。

单选按钮（作业）--MarsChen Android 开发教程学习笔记 - Roller44 - 病友说

在XML文件中代码：


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
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.shumin.lbs02.MainActivity" >
<RadioGroup 
android:id="@+id/radiogroup1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<RadioButton 
android:id="@+id/radiobuttona"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="A"/>
<RadioButton 
android:id="@+id/radiobuttonb"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="B"/>
</RadioGroup>
<RadioGroup
android:id="@+id/radiogroup2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<RadioButton 
android:id="@+id/radiobuttonc"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="C"/>
<RadioButton 
android:id="@+id/radiobuttond"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="D"/>
</RadioGroup>

</LinearLayout>

在JAVA文件中代码：


package com.shumin.lbs02;

import java.util.RandomAccess;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View.OnClickListener;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;


public class MainActivity extends ActionBarActivity {
private RadioGroup groupone;
private RadioButton buttona;
private RadioButton buttonb;
private RadioGroup grouptwo;
private RadioButton buttonc;
private RadioButton buttond;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
groupone=(RadioGroup)findViewById(R.id.radiogroup1);
buttona=(RadioButton)findViewById(R.id.radiobuttona);
buttonb=(RadioButton)findViewById(R.id.radiobuttonb);
grouptwo=(RadioGroup)findViewById(R.id.radiogroup2);
buttonc=(RadioButton)findViewById(R.id.radiobuttonc);
buttond=(RadioButton)findViewById(R.id.radiobuttond);
RadioButtonListener listener=new RadioButtonListener();
buttona.setOnCheckedChangeListener(listener);
}
class RadioButtonListener implements android.widget.CompoundButton.OnCheckedChangeListener{

@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
buttonc.setChecked(isChecked);
buttond.setChecked(!isChecked);
}
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}