RadioButton与CheckBox

Posted 2020-07-20 Tears_fg

xml文件：

<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="com.example.day03.MainActivity" >
<!-- RadioGroup 为单选框分组 -->
   <RadioGroup 
       android:id="@+id/group_sex"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:orientation="horizontal">
            <RadioButton 
            android:id="@+id/man"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:checked = "true"
            android:text="男" />
        <RadioButton
            android:id="@+id/woman"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="女"/>
        
  </RadioGroup>
  <Button 
      android:id="@+id/button01"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="确定"
      android:onClick="click"/>
  <TextView 
      android:id="@+id/text"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="学习的课程："
      />
  <CheckBox 
      android:id="@+id/language"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="语文"/>
<CheckBox 
      android:id="@+id/math"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="数学"/>
  <CheckBox 
      android:id="@+id/english"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="英语"/>
  <Button 
      android:id="@+id/buttton02"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="commit"
      android:onClick="click1"/>

</LinearLayout>

源代码：

package com.example.day03;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.CheckBox;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

public class MainActivity extends Activity {
    RadioGroup radioGroup;
    CheckBox[] checks;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        radioGroup = (RadioGroup) findViewById(R.id.group_sex);
        checks = new CheckBox[3];
        //找出对应的控件
        checks[0] = (CheckBox) findViewById(R.id.language);
        checks[1] = (CheckBox) findViewById(R.id.math);
        checks[2] = (CheckBox) findViewById(R.id.english);
        
    }
    public void click(View v){
    //找出RadioGroup选中的radioButton
        //方法一：通过RadioGroup的getCheckedRAdioButtonId()方法找到被选中的id
        int id = radioGroup.getCheckedRadioButtonId();
        RadioButton radioButton = (RadioButton) findViewById(id);
        Toast.makeText(MainActivity.this, radioButton.getText().toString(), Toast.LENGTH_SHORT).show();
        //方法二：遍历RadioGroup下面所有的RadioButton,找出选中的项
        for (int i = 0; i < radioGroup.getChildCount(); i++) {
            RadioButton radioButton1 = (RadioButton) radioGroup.getChildAt(i);
            if(radioButton1.isChecked()){
                Toast.makeText(MainActivity.this, radioButton1.getText().toString(), Toast.LENGTH_SHORT).show();
            }
        
            }
    }
    //点击该按钮时调用该方法
    public void click1(View v){
        String result = "";
        //遍历checks数组找出选中项
        for (CheckBox check : checks) {
            if(check.isChecked()){
                result += check.getText().toString();
            }
        }
        Toast.makeText(MainActivity.this, result, Toast.LENGTH_SHORT).show();
    }

    
}