1.activity_main.xml文件中
<TextView
android:id="@+id/tvHead"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:text="单选按钮的使用"
android:textSize="20dp" />
<RadioGroup
android:id="@+id/rgSex"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/tvHead"
android:layout_centerHorizontal="true"
android:layout_marginTop="19dp"
android:orientation="horizontal" >
<RadioButton
android:id="@+id/rbMale"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="男" />
<RadioButton
android:id="@+id/rbFemale"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="女" />
</RadioGroup>
2.MainActivity.java文件中
package com.t20.RadioGroup;
import android.app.Activity;
import android.os.Bundle;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.Toast;
public class MainActivity extends Activity implements OnCheckedChangeListener {
private RadioGroup rgSex;
private String sex;// 性别
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rgSex = (RadioGroup) findViewById(R.id.rgSex);
// 绑定事件
rgSex.setOnCheckedChangeListener(this);
}
@Override
public void onCheckedChanged(RadioGroup radioGroup, int id) {
// TODO Auto-generated method stub
switch (id) {
// 选择男
case R.id.rbMale:
sex = "男";
break;
// 选择女
case R.id.rbFemale:
sex = "女";
break;
default:
break;
}
Toast.makeText(MainActivity.this, sex, Toast.LENGTH_SHORT).show();
}
}