Android程序开发中单选按钮(RadioGroup)的使用详解

<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="match_parent" 
tools:context=".mainactivity" 
android:orientation="vertical"> 
<textview 
android:id="@+id/txt" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:text="您的性别为"/> 
<radiogroup 
android:id="@+id/sex" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content"> 
<radiobutton 
android:id="@+id/male" 
android:text="男"/> 
<radiobutton 
android:id="@+id/female" 
android:text="女"/> 
</radiogroup> 
</linearlayout> 

public class
mainactivity extends activity { 
private textview txt=null; 
private radiogroup sex=null; 
private radiobutton male=null; 
private radiobutton female=null; 
@override 
protected void
oncreate(bundle savedinstancestate) { 
super.oncreate(savedinstancestate); 
setcontentview(r.layout.activity_main); 
this.txt=(textview)
super.findviewbyid(r.id.txt); 
this.sex=(radiogroup)
super.findviewbyid(r.id.sex); 
this.male=(radiobutton)
super.findviewbyid(r.id.male); 
this.female=(radiobutton)
super.findviewbyid(r.id.female); 
this.sex.setoncheckedchangelistener(new
oncheckedchangelistenerimp()); 
} private class
oncheckedchangelistenerimp implements
oncheckedchangelistener{ 
public void
oncheckedchanged(radiogroup group, int checkedid)
{ string temp=null; 
if(mainactivity.this.male.getid()==checkedid){ 
temp="男"; 
} else if(mainactivity.this.female.getid()==checkedid){ 
temp="女"; 
} mainactivity.this.txt.settext("您的性别是"+temp); 
} }