佈局文件
<RelativeLayout 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"
>
<!--RadioGroup 是LinearLayout的子類
android:checked="true" 是默認選中
-->
<RadioGroup
android:id="@+id/rg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<RadioButton
android:id="@+id/rb_female"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="美女"
android:onClick="onRadioBtn"
android:checked="true"
/>
<RadioButton
android:id="@+id/rb_male"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="帥哥"
android:onClick="onRadioBtn"
/>
</RadioGroup>
</RelativeLayout>
Java代碼
package com.qianfeng.day03_radiobutton;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;
public class MainActivity extends Activity {
private RadioButton rb_female, rb_male;
private RadioGroup rg ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//通過findViewById 找到相應的控件
rg = (RadioGroup) findViewById(R.id.rg);
rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
// 參數1:你點擊的RadioButton的組 參數2:是你選中的控件的id
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
RadioButton rb = (RadioButton) findViewById(checkedId);
//參數1:上下文對象 參數2:顯示的文本信息 參數3:顯示的時間
Toast.makeText(MainActivity.this, rb.getText().toString(), 0).show();
}
});
}
//radioButton的點擊事件
public void onRadioBtn(View v) {
RadioButton rb = (RadioButton) v;// 轉型 得到點擊的按鈕
boolean isChecked = rb.isChecked();//得到按鈕的狀態
switch (v.getId()) {
// case R.id.rb_female:
// Toast.makeText(MainActivity.this, "美女", Toast.LENGTH_SHORT).show();
// break;
// case R.id.rb_male:
// Toast.makeText(MainActivity.this, "帥哥", Toast.LENGTH_SHORT).show();
// break;
default:
break;
}
}
}