RadioButton实现多选一

RadioButton实现多选一

一、简介

二、RadioButton实现多选一方法

1、将多个RadioButton放在一个RadioGroup里面

     <RadioGroup
         android:id="@+id/radioGroup1"
         android:layout_width="match_parent"
         android:layout_height="wrap_content" >

         <RadioButton
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="男"
             android:textColor="#FFFFFF" />

         <RadioButton
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="女"
             android:textColor="#FFFFFF" />
     </RadioGroup>

2、在RadioGroup里面取出每个RadioButton

 public void onClick(View v) {
                 // TODO Auto-generated method stub
                 int len = radioGroup1.getChildCount();
                 for (int i = 0; i < len; i++) {
                     RadioButton radio = (RadioButton) radioGroup1.getChildAt(i);                 }
             }

3、检查每个RadioButton是否被选取

 if (radio.isChecked()) {

                         break;
                     }

4、取出被选取的那个RadioButton里面的值

 Toast.makeText(Activity01.this, radio.getText(),
                                 Toast.LENGTH_LONG).show();

三、代码实例

效果图：

代码：

fry.Activity01

 package fry;

 import com.example.RadioButtonDemo1.R;

 import android.app.Activity;
 import android.os.Bundle;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.RadioButton;
 import android.widget.RadioGroup;
 import android.widget.TextView;
 import android.widget.Toast;

 public class Activity01 extends Activity {
     private Button btn_chooseGender;
     private RadioGroup radioGroup1;
     private TextView tv_answer;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         // TODO Auto-generated method stub
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity01);

         btn_chooseGender = (Button) findViewById(R.id.btn_chooseGender);
         radioGroup1 = (RadioGroup) findViewById(R.id.radioGroup1);
         tv_answer = (TextView) findViewById(R.id.tv_answer);
         /*
          * RadioButton实现多选一方法
          * 1、将多个RadioButton放在一个RadioGroup里面
          * 2、在RadioGroup里面取出每个RadioButton
          * 3、检查每个RadioButton是否被选取
          * 4、取出被选取的那个RadioButton里面的值
          */
         btn_chooseGender.setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View v) {
                 // TODO Auto-generated method stub
                 int len = radioGroup1.getChildCount();
                 for (int i = 0; i < len; i++) {
                     RadioButton radio = (RadioButton) radioGroup1.getChildAt(i);
                     if (radio.isChecked()) {
                         Toast.makeText(Activity01.this, radio.getText(),
                                 Toast.LENGTH_LONG).show();
                         break;
                     }
                 }
             }
         });
     }
 }

/RadioButtonDemo1/res/layout/activity01.xml

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="@android:color/black"
     android:orientation="vertical" >

     <TextView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text="性别"
         android:textAppearance="?android:attr/textAppearanceLarge"
         android:layout_gravity="center_horizontal"
         android:textColor="#FFFFFF" />

     <RadioGroup
         android:id="@+id/radioGroup1"
         android:layout_width="match_parent"
         android:layout_height="wrap_content" >

         <RadioButton
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="男"
             android:textColor="#FFFFFF" />

         <RadioButton
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="女"
             android:textColor="#FFFFFF" />
     </RadioGroup>

     <Button
         android:id="@+id/btn_chooseGender"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text="选择性别"
         android:textColor="#FFFFFF" />
         />

     <TextView
         android:id="@+id/tv_answer"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text=""
         android:textAppearance="?android:attr/textAppearanceLarge"
         android:layout_gravity="center_horizontal"
         android:textColor="#FFFFFF" />
 </LinearLayout>

四、收获

1、

android:textColor="#FFFFFF"

设置颜色，直接用#FFFFFF

2、

android:layout_gravity="center_horizontal"

文字居中显示

3、

RadioButton在RadioGroup里面实现多选一

4、

android:background="@android:color/black"

设置黑色，系统自带颜色

5、

int len = radioGroup1.getChildCount();

RadioGroup获取孩子数量

6、

RadioButton radio = (RadioButton) radioGroup1.getChildAt(i);

RadioGroup获取孩子

7、

if (radio.isChecked())

判断RadioButton是否被选取

8、

Toast.makeText(Activity01.this, radio.getText(),Toast.LENGTH_LONG).show();

吐司