#布局文件

<androidx.constraintlayout.widget.ConstraintLayout 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:background="@color/colorBackgrounnd"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/game_score_text_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/your_score"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.022" />

    <TextView
        android:id="@+id/time_left_text_view"
        android:layout_width="97dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="325dp"
        android:text="@string/time_left"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.022" />

    <Button
        android:id="@+id/tap_me_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/tap_me"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

#string.xml

<resources>
    <string name="app_name">TimeFighter2</string>
    <string name="tap_me">Tap me!</string>
    <string name="your_score">Your Score: </string>
    <string name="time_left">Time left: </string>
    <string name="game_over_message">Tap up! Your Score was: %1$d</string>
    <string name="about_title">Timefighter </string>
    <string name="about_message">Create by LinLinLin</string>
</resources>

#核心代码

mport androidx.annotation.NonNull;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;

import android.app.Dialog;
import android.icu.text.UFormat;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    private Button mybutton;
    private TextView gamescore,timeleft;
    private int count = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mybutton = findViewById(R.id.tap_me_button);
        gamescore = findViewById(R.id.game_score_text_view);
        timeleft =findViewById(R.id.time_left_text_view);
            mybutton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    count++;
                    gamescore.setText("Your Score:"+count+"");
                }
            });
        CountDownTimer timer = new CountDownTimer(60*1000,1000) {/*倒计时 参数一倒计时的总时间 参数二 倒计时的间隔*/
            @Override
            public void onTick(long millisUntilFinished) {
                timeleft.setText("还剩"+millisUntilFinished/1000+"秒");
            }

            @Override
            public void onFinish() {
                timeleft.setText("时间到");
                gamescore.setText("共点击了"+count+"次");
                mybutton.setEnabled(false);
            }
        }.start();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu,menu);//创建选项菜单
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
        switch (item.getItemId()){
            case R.id.about_item:
                new AlertDialog.Builder(MainActivity.this)
                        .setTitle("TimeFighter1.0")
                        .setMessage("create Yin Yi Qiang")
                        .show();
        }
        return super.onOptionsItemSelected(item);
    }
}