android RadioGroup的使用
创建一个MainActivity.java的主类
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<?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。