android中互斥的控件,Android控件之Radiobutton与RadioGroup

RadioButton 是一个单选控件，在一个RadioGroup中，各个RadioButton是互斥的

XML文件：

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="${relativePackage}.${activityClass}" >

android:id="@+id/RadioGroup1"

android:layout_width="fill_parent"

android:layout_height="match_parent"

>

android:id="@+id/radioButton1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_marginTop="42dp"

android:text="RadioButton" />

android:id="@+id/radioButton2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/radioButton1"

android:text="RadioButton" />

android:id="@+id/radioButton3"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/radioButton2"

android:text="RadioButton" />

使用OnCheckedChangeListener监听：

package com.example.textview;

import android.app.Activity;

import android.os.Bundle;

import android.widget.RadioButton;

import android.widget.RadioGroup;

import android.widget.RadioGroup.OnCheckedChangeListener;

public class MainActivity extends Activity {

private RadioGroup RadioGroup1=null;

private RadioButton RadioButton1=null;

private RadioButton RadioButton2=null;

private RadioButton RadioButton3=null;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

RadioGroup1=(RadioGroup)findViewById(R.id.RadioGroup1);

RadioButton1=(RadioButton)findViewById(R.id.radioButton1);

RadioButton2=(RadioButton)findViewById(R.id.radioButton2);

RadioButton3=(RadioButton)findViewById(R.id.radioButton3);

RadioGroup1.setOnCheckedChangeListener(listener);

}

private OnCheckedChangeListener listener = new OnCheckedChangeListener() {

@Override

public void onCheckedChanged(RadioGroup group, int checkedId) {

if(checkedId==RadioButton1.getId())

{

System.out.println("button 1");

}

else if(checkedId==RadioButton2.getId())

{

System.out.println("button 2");

}

else if(checkedId==RadioButton3.getId())

{

System.out.println("button 3");

}

}

};

}