watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center” width=”400″ height=”600″ alt=””>
首先，在布局文件 activity_main.xml中注冊一个RadioGroup,并为RadioGroup设置监听，图中两个RadioButton为一个RadioGroup。
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity"> <TextView android:text="@string/hello_world"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<RadioGroup
android:id="@+id/radioGroupID"
android:layout_width="wrap_content"
android:layout_height="wrap_content" > <RadioButton
android:id="@+id/femaleGroupID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="female"
/>
<RadioButton
android:id="@+id/maleGroupID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="male"/>
</RadioGroup></LinearLayout>MainActivity.java
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.RadioButton;
import android.widget.RadioGroup;public class MainActivity extends ActionBarActivity { private RadioGroup radioGroup;
private RadioButton femaleRadioButton;
private RadioButton maleRadioButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//载入布局文件
setContentView(R.layout.activity_main);
//获取实例
radioGroup=(RadioGroup)findViewById(R.id.radioGroupID);
femaleRadioButton=(RadioButton)findViewById(R.id.femaleGroupID);
maleRadioButton=(RadioButton)findViewById(R.id.maleGroupID);
//设置监听
radioGroup.setOnCheckedChangeListener(new RadioGroupListener());
}
//定义一个RadioGroup的OnCheckedChangeListener
//RadioGroup 绑定的是RadioGroup.OnCheckedChangeListener
//CheckBox 绑定的是CompoundButton.OnCheckedChangeListener 或者 view.OnClickListener class RadioGroupListener implements RadioGroup.OnCheckedChangeListener{
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
if (checkedId==femaleRadioButton.getId()){
System.out.println("选中了female!");
}else if (checkedId==maleRadioButton.getId()){
System.out.println("选中了male!");
}
}
} @Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
} @Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId(); //noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
} return super.onOptionsItemSelected(item);
}
}日志显演示样例如以下：
