安卓——RadioGroup和RadioButton

痛定思痛。 2022-05-31 13:06 190阅读 0赞

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1. xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        tools:context="com.example.lenovo.radiogroup.MainActivity">
    
    
        <RadioGroup
            android:id="@+id/radioGroup1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">
    
        <RadioButton
            android:id="@+id/radioButton1"
            android:checked="true"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="男" />
        <RadioButton
            android:id="@+id/radioButton2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="女" />
    
        </RadioGroup>
    
    
    
    </LinearLayout>

2.MainActivity

package com.example.lenovo.radiogroup;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.util.Log;
    import android.widget.RadioGroup;
    
    public class MainActivity extends Activity implements RadioGroup.OnCheckedChangeListener{
        private RadioGroup rd;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            rd = (RadioGroup) findViewById(R.id.radioGroup1);
    
            //用实现接口的方式添加响应事件
            rd.setOnCheckedChangeListener(this);
    
        }
    
        @Override
        public void onCheckedChanged(RadioGroup radioGroup, int i) {
    
            //i代表RadioGroup中的RadioButton的id
            switch(i)
            {
                case R.id.radioButton1:
                    Log.i("tag","你是一个男孩");
                    break;
                case R.id.radioButton2:
                    Log.i("tag","你是一个女孩");
                    break;
                default:
                    break;
            }
        }
    }

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[70]: /images/20220531/369d93c5978341a09e77b4a75c917280.png
[70 1]: /images/20220531/7c4fcb0f24f5465098ede4eb774e20af.png
[70 2]: /images/20220531/10d870c606504b45915d41cbb7c77b10.png