Android 单选框RadioGroup

Android 单选框RadioGrop的使用。里面添加的是RadioButton

package com.radiodemo;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;

public class MainActivity extends Activity {

	/*************************************
	 * 单选框RadioButton的使用
	 * 
	 * 1.定义见布局文件 2.事件的添加方法
	 * 
	 ***********************************/

	private TextView textView;
	private RadioGroup radioGroup;
	private RadioButton radioButton1, radioButton2;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		// 关联布局中的控件
		textView = (TextView) findViewById(R.id.textView);// 用来显示选择
		radioGroup = (RadioGroup) findViewById(R.id.radioGroup);
		radioButton1 = (RadioButton) findViewById(R.id.radioButton1);
		radioButton2 = (RadioButton) findViewById(R.id.radioButton2);

		radioGroup.setOnCheckedChangeListener(mChangeListener);
	}

	// 响应事件的函数。
	private RadioGroup.OnCheckedChangeListener mChangeListener = new RadioGroup.OnCheckedChangeListener() {

		@Override
		public void onCheckedChanged(RadioGroup group, int checkedId) {
			// TODO Auto-generated method stub

			if (radioButton1.getId() == checkedId) {
				textView.setText(radioButton1.getText());
			} else {
				textView.setText(radioButton2.getText());
			}

		}
	};

	@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;
	}
}

布局文件main.xml