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);11                 }
            }

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