Android控件系列之RadioButton与RadioGroup使用方法

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="请选择您的性别："
android:textSize="9pt"
/>
<RadioGroup android:id="@+id/radioGroup" android:contentDescription="性别" android:layout_width="wrap_content" android:layout_height="wrap_content">
<RadioButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/radioMale" android:text="男" android:checked="true"></RadioButton>
<RadioButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/radioFemale" android:text="女"></RadioButton>
</RadioGroup>
<TextView
android:id="@+id/tvSex"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="您的性别是：男"
android:textSize="9pt"
/>
</LinearLayout>

TextView tv = null;//根据不同选项所要变更的文本控件
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//根据ID找到该文本控件
tv = (TextView)this.findViewById(R.id.tvSex);
//根据ID找到RadioGroup实例
RadioGroup group = (RadioGroup)this.findViewById(R.id.radioGroup);
//绑定一个匿名监听器
group.setOnCheckedChangeListener(new OnCheckedChangeListener() {

@Override
public void onCheckedChanged(RadioGroup arg0, int arg1) {
// TODO Auto-generated method stub
//获取变更后的选中项的ID
int radioButtonId = arg0.getCheckedRadioButtonId();
//根据ID获取RadioButton的实例
RadioButton rb = (RadioButton)MyActiviy.this.findViewById(radioButtonId);
//更新文本内容，以符合选中项
tv.setText("您的性别是：" + rb.getText());
}
});
}