android RadioGroup的使用

创建一个MainActivity.java的主类

<?xml version="1.0" encoding="UTF-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical">    <TextView        android:id="@+id/radiobutton_textview"        android:layout_width="fill_parent"        android:layout_height="50dip"        android:textSize="18dip"        android:textStyle="bold"        android:background="@android:drawable/title_bar"        android:textAppearance="?android:attr/textAppearanceLarge"        android:gravity="center_vertical"        />     <RadioGroup        android:id="@+id/group"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:orientation="vertical">        <RadioButton            android:id="@+id/button1"            android:layout_width="fill_parent"            android:layout_height="50dip"            android:textSize="20dip"            android:paddingLeft="30dip"            android:text="Android新手"            android:button="@null"                                android:drawableRight="@android:drawable/btn_radio"/>        <View            android:layout_width="fill_parent"            android:layout_height="1px"            android:background="?android:attr/listDivider"            />        <RadioButton            android:id="@+id/button2"            android:layout_width="fill_parent"            android:layout_height="50dip"            android:textSize="20dip"            android:paddingLeft="30dip"            android:text="Android高手"            android:button="@null"            android:drawableRight="@android:drawable/btn_radio"/>       </RadioGroup> </LinearLayout>

package endual.radio;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 MainActivity extends Activity {      private TextView textView;      private RadioGroup group;          private RadioButton rb1 ;    private RadioButton rb2 ;   /** Called when the activity is first created. */        @Override      public void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);              setContentView(R.layout.main);            textView = (TextView) findViewById(R.id.radiobutton_textview);          group = (RadioGroup) findViewById(R.id.group);                  this.rb1 = (RadioButton) this.findViewById(R.id.button1) ;        this.rb2 = (RadioButton) this.findViewById(R.id.button2) ;                  // 单选按钮组监听事件          group.setOnCheckedChangeListener(new OnCheckedChangeListener() {                @Override                  public void onCheckedChanged(RadioGroup group, int checkedId) {                  // 根据ID判断选择的按钮                      if (checkedId == R.id.button1) {                                              textView.setText("Android新手");                          rb1.setText("我是1") ;                        String msg = rb1.getText().toString() ; //获取单独的radioButton的按钮                        rb2.setText(msg) ;                        //System.out.println();                    } else {                          textView.setText("Android高手");                          rb2.setText("我是2") ;                    }                  }            });                              }  }

RadioGroup注册监听事件OnCheckedChangeListener()，在onCheckedChanged实现业务逻辑。

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