本文实例讲述了Android RadioGroup和RadioButton控件简单用法。分享给大家供大家参考，具体如下：

RadioGroup和RadioButton代表的是Android中单选按钮的一种控件，写个简单的代码熟悉一下：

import android.app.Activity; import android.os.Bundle; import android.widget.RadioButton; import android.widget.RadioGroup; import android.widget.RadioGroup.OnCheckedChangeListener; import android.widget.TextView; public class Radio extends Activity { private TextView myTextView; private RadioButton chinaBtn; private RadioButton ukBtn; private RadioButton usaBtn; private RadioGroup rg; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //通过ID找到TextView myTextView = (TextView) findViewById(R.id.myTextView); //通过ID找到RadioButton chinaBtn = (RadioButton) findViewById(R.id.china_Button); ukBtn = (RadioButton) findViewById(R.id.uk_Button); usaBtn = (RadioButton) findViewById(R.id.usa_Button); //通过ID找到RadioGroup rg = (RadioGroup) findViewById(R.id.rBtnGroup); //只要对RadioGroup进行监听 rg.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup group, int checkedId) { // TODO Auto-generated method stub if(R.id.china_Button == checkedId){ myTextView.setText("您选择的国家是：" + chinaBtn.getText().toString()); } else if(R.id.uk_Button == checkedId){ myTextView.setText("您选择的国家是：" + ukBtn.getText().toString()); } else if(R.id.usa_Button == checkedId){ myTextView.setText("您选择的国家是：" + usaBtn.getText().toString()); } } }); } }

main.xml文件如下：

<"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:id="@+id/myTextView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/hello" /> <RadioGroup android:id="@+id/rBtnGroup" android:layout_width="wrap_content" android:layout_height="wrap_content" > <RadioButton android:id="@+id/china_Button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="中国" /> <RadioButton android:id="@+id/uk_Button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="英国" /> <RadioButton android:id="@+id/usa_Button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="美国" /> </RadioGroup> </LinearLayout>

效果如下：

希望本文所述对大家Android程序设计有所帮助。