单选按钮RadioButton同一组包含在同一个RadioGroup中，当点击RadioButton时会触发onClick事件。另外，RadioGroup会触发CheckChange事件，当RadioButton选择改变时触发。触发顺序为先触发CheckChange事件然后是Click事件。

测试代码

protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.w2_11);
		
		final TextView tv1 =  (TextView) findViewById(R.id.w2_11_tv1) ;
		final RadioButton  rb1 = (RadioButton) findViewById(R.id.w2_11_rb1) ;
		final RadioButton rb2 = (RadioButton) findViewById(R.id.w2_11_rb2) ;
		RadioGroup rg1 = (RadioGroup) findViewById(R.id.w2_11_rg1) ;
		
		rg1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
			public void onCheckedChanged(RadioGroup group, int checkedId) {
				if(checkedId == rb1.getId()){
					tv1.setText("女change") ;
				}else if(checkedId == rb2.getId()){
					tv1.setText("男change") ;
				}else{
					tv1.setText("change") ;
				}
			}
		}) ;	
		rb1.setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
				tv1.setText("女"+tv1.getText().toString()) ;
			}
		}) ;
		rb2.setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
				tv1.setText("男"+tv1.getText().toString()) ;
			}
		}) ;
	}
	

xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/w2_11_tv1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="请选择性别" />


    <RadioGroup
        android:id="@+id/w2_11_rg1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >

	    <RadioButton
	        android:id="@+id/w2_11_rb1"
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:checked="false"
	        android:text="女" />
	
	    <RadioButton
	        android:id="@+id/w2_11_rb2"
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:checked="false"
	        android:text="男" />
    </RadioGroup>

</LinearLayout>