Android实现掷骰子效果

本文实例为大家分享了Android实现掷骰子效果的具体代码，供大家参考，具体内容如下

利用handler接受子线程的消息完成骰子点数的不断更替

演示

START:开始游戏
STOP:停止游戏
RECOVER:重置色子到初始状态

代码

package com.example.homeworkten;import androidx.annotation.NonNull;import androidx.appcompat.app.AppCompatActivity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.Toast;public class MainActivity extends AppCompatActivity { private ImageView imageView1,imageView2,imageView3; private Button button1,button2,button3; private ImageView[] imageViews; private Handler handler; //子线程 private Thread thread; //记录每个色子的点数 private int number[]; //色子的总点数 private int count; //volatile修饰符用来保证其它线程读取的总是该变量的最新的值 public volatile boolean isStop = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); number = new int[3]; imageView1 = findViewById(R.id.imageView1); imageView2 = findViewById(R.id.imageView2); imageView3 = findViewById(R.id.imageView3); button1 = findViewById(R.id.button1); button2 = findViewById(R.id.button2); button3 = findViewById(R.id.button3); imageViews = new ImageView[]{imageView1,imageView2,imageView3}; button1.setOnClickListener(new View.OnClickListener() {  @Override  public void onClick(View v) {  //判断线程是否存在  if (thread != null&&isStop == true){   isStop = false;  }  handler = new Handler(){   @Override   public void handleMessage(@NonNull Message msg) {   super.handleMessage(msg);   for(int i = 0;i < 3;i++) {    switch (number[i]) {    case 1:     imageViews[i].setImageResource(R.drawable.t1);     break;    case 2:     imageViews[i].setImageResource(R.drawable.t2);     break;    case 3:     imageViews[i].setImageResource(R.drawable.t3);     break;    case 4:     imageViews[i].setImageResource(R.drawable.t4);     break;    case 5:     imageViews[i].setImageResource(R.drawable.t5);     break;    case 6:     imageViews[i].setImageResource(R.drawable.t6);     break;    }   }   }  };  thread = new Thread(new Runnable() {   @Override   public void run() {   while (!isStop) {    Message message = handler.obtainMessage();    //总点数归零    count = 0;    for (int i = 0; i < 3; i++) {    try {     Thread.sleep(50);    } catch (InterruptedException e) {     e.printStackTrace();    }    //生成随机数    int random = (int) (Math.random() * 6 + 1);    number[i] = random;    count += random;    }    handler.sendMessage(message);   }   }  });  thread.start();  } }); //停止掷筛子 button2.setOnClickListener(new View.OnClickListener() {  @Override  public void onClick(View v) {  if(isStop == false) {   isStop = true;   try {   //当子线程执行完以后才继续执行主线程   thread.join();   } catch (InterruptedException e) {   e.printStackTrace();   }   //显示掷出的点数   Toast.makeText(MainActivity.this, "你掷的点数为" + count, Toast.LENGTH_SHORT).show();  }else {   Toast.makeText(MainActivity.this, "请点击开始键进行掷色子", Toast.LENGTH_SHORT).show();  }  } }); //将色子还原到初始状态 button3.setOnClickListener(new View.OnClickListener() {  @Override  public void onClick(View v) {  if(isStop == true) {   for (int i = 0; i < 3; i++) {   imageViews[i].setImageResource(R.drawable.t1);   }  }else {   Toast.makeText(MainActivity.this, "请先停止游戏，再重新开始", Toast.LENGTH_SHORT).show();  }  } }); }}

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