android studio:Unfortunately,xxx has stopped

Question

MainActivity. java文件：

package com.example.shiyan3;

import androidx.appcompat.app.AppCompatActivity;

import android.view.View;
import android.widget.CheckBox;
import android.os.Bundle;
import android.widget.CompoundButton;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.Button;
import android.view.View.OnClickListener;

public class MainActivity extends AppCompatActivity {
    private CheckBox ballChx;//初始化
    private CheckBox paintChx;
    private CheckBox musicChx;
    private Button fb;
    private TextView tt;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ballChx = (CheckBox)findViewById(R.id.checkbox1);//通过findViewByID获得checkbox对象
        paintChx=(CheckBox)findViewById(R.id.checkbox2);
        musicChx=(CheckBox)findViewById(R.id.checkbox3);
        //tt=(TextView)findViewById(R.id.tv);
        fb=(Button)findViewById(R.id.finalbutton);
        //注册事件监听器
        ballChx.setOnCheckedChangeListener(listener);
        paintChx.setOnCheckedChangeListener(listener);
        musicChx.setOnCheckedChangeListener(listener);
        fb.setOnClickListener(new ClickListener());} //实现button的业务逻辑
        class ClickListener implements OnClickListener{
            @Override
            public void onClick(View v) {
                tt.setText("您已提交!");
            }
    }
    //响应事件
    private CompoundButton.OnCheckedChangeListener  listener= new CompoundButton.OnCheckedChangeListener(){
        @Override
        public void onCheckedChanged (CompoundButton buttonView,
                boolean isChecked){
                    switch (buttonView.getId()){
                        case R.id.checkbox1://选择球类
                            if (isChecked){
                                Toast.makeText(MainActivity.this, "已选择球类", Toast.LENGTH_SHORT).show();
                            } break;
                        case R.id.checkbox2://选择球类
                            if (isChecked){
                                Toast.makeText(MainActivity.this, "已选择绘画", Toast.LENGTH_SHORT).show();
                            } break;
                        case R.id.checkbox3://选择球类
                            if (isChecked){
                                Toast.makeText(MainActivity.this, "已选择声乐", Toast.LENGTH_SHORT).show();
                            }
                        default:
                            break;
                    }
        }
    };


}

activity_main.xml文件：

<?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">

    <ImageView
        android:id="@+id/touxiang"
        android:layout_width="70dp"
        android:layout_height="60dp"
        android:layout_gravity="center"
        android:layout_marginTop="16sp"
        android:src='@drawable/shiyan3'
        />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:orientation="horizontal">
        <TextView

            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="姓名："
            style="@style/Size"
            />
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="5dp"
        android:orientation="horizontal">
        <TextView

            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="手机号："
            style="@style/Size"
            />
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="5dp"
        android:orientation="horizontal">
        <TextView

            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="年龄："
            style="@style/Size"
            />
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
    </LinearLayout>

    <RadioGroup
        android:id="@+id/radioGroup"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <RadioButton
            android:id="@+id/radioButton1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="男"/>
        <RadioButton
            android:id="@+id/radioButton2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="女"/>
    </RadioGroup>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="请选择你的爱好："
        android:textSize="18sp"
        android:textStyle="bold"
        android:textColor='#000000'
        />
    <CheckBox
        android:id="@+id/checkbox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="球类"
        android:textSize="16sp"
        />

    <CheckBox
        android:id="@+id/checkbox2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="绘画"
        android:textSize="16sp"
        />

    <CheckBox
        android:id="@+id/checkbox3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="声乐"
        android:textSize="16sp"
        />

    <Button
        android:id="@+id/finalbutton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="提交"
        android:textSize="16sp"
        />
    <!--TextView
        android:id="@+id/tv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="您已提交!"
        android:textSize="15sp"
        android:layout_gravity="center"
        android:layout_marginTop="5dp"
        /-->

</LinearLayout>

AndroidManifest.xml文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.shiyan3">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name="com.example.shiyan3.MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

试了很多方法都没用，安卓怎么不去死啊！！！！