1 Java程式碼

package com.example.myapplication;
 
import androidx.appcompat.app.AppCompatActivity;
 
import android.os.Bundle;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;
 
public class RadioActivity extends AppCompatActivity {
    private RadioGroup mRg1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.zhuce);
        mRg1 = findViewById(R.id.Rad1);
        mRg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int i) {
                RadioButton radioButton= radioGroup.findViewById(i);
                Toast.makeText(RadioActivity.this,radioButton.getText(),Toast.LENGTH_SHORT).show();
            }
        });
    }
}

　　2 XML檔案

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dp">
    <TextView
        android:id="@+id/text1"
        android:layout_width="600dp"
        android:layout_height="38dp"
        android:text="請選擇你的性別為:"
        android:textSize="32dp"
        android:textColor="#000000"/>
    <RadioGroup
        android:id="@+id/Rad1"
        android:orientation="horizontal"
        android:layout_below="@id/text1"
        android:layout_width="wrap_content"
        android:layout_height="32dp">
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="50dp"
            android:textSize="20dp"
            android:text="男"/>
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="80dp"
            android:textSize="20dp"
            android:text="女"/>
    </RadioGroup>
    <EditText
        android:layout_marginTop="40dp"
        android:id="@+id/Edi1"
        android:layout_below="@id/Rad1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:drawableLeft="@drawable/bianjiziliao"
        android:hint="請輸入使用者名稱:"
        android:background="@drawable/button_zhuce"
        android:maxLines="1" />
    <EditText
        android:id="@+id/Edi2"
        android:layout_below="@id/Edi1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="請輸入手機號:"
        android:drawableLeft="@drawable/shouji"
        android:background="@drawable/button_zhuce"
        android:maxLines="1" />
    <EditText
    android:id="@+id/Edi3"
    android:layout_below="@id/Edi2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="請輸入郵箱:"
        android:drawableLeft="@drawable/youxiang"
        android:background="@drawable/button_zhuce"
    android:maxLines="1" />
    <EditText
        android:id="@+id/Edi4"
        android:layout_below="@id/Edi3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/button_zhuce"
        android:hint="請輸入密碼:"
        android:drawableLeft="@drawable/mima"
        android:maxLines="1" />
    <EditText
        android:id="@+id/Edi5"
        android:layout_below="@id/Edi4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/button_zhuce"
        android:hint="再次驗證密碼:"
        android:drawableLeft="@drawable/mima"
        android:maxLines="1" />
    <TextView
        android:layout_marginTop="30dp"
        android:layout_below="@id/Edi5"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="點選[註冊]按鈕即代表同意《老吳克註冊協議》"
        android:gravity="center"
        android:textColor="#ff9900"/>
    <Button
        android:layout_marginTop="60dp"
        android:layout_below="@id/Edi5"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:textColor="#ffffff"
        android:background="@drawable/bg_btn4"
        android:text="註冊"
        android:textSize="20dp"/>


</RelativeLay