Android实现掷骰子效果

时间:2020-05-21 不能及人气:0

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();
        }
      }
    });
  }
}

<?xml version="1.0" encoding="utf-8"?>
<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"
  tools:context=".MainActivity">

  <ImageView
    android:id="@+id/imageView1"
    android:layout_width="100dp"
    android:layout_height="80dp"
    android:layout_marginStart="10dp"
    android:layout_marginLeft="10dp"
    android:layout_marginTop="40dp"
    android:layout_marginEnd="10dp"
    android:layout_marginRight="10dp"
    app:layout_constraintEnd_toStartOf="@+id/imageView2"
    app:layout_constraintHorizontal_bias="0.482"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/t1" />

  <ImageView
    android:id="@+id/imageView2"
    android:layout_width="100dp"
    android:layout_height="80dp"
    android:layout_marginStart="10dp"
    android:layout_marginLeft="10dp"
    android:layout_marginTop="40dp"
    android:layout_marginEnd="10dp"
    android:layout_marginRight="10dp"
    app:layout_constraintEnd_toStartOf="@+id/imageView3"
    app:layout_constraintStart_toEndOf="@+id/imageView1"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/t1" />

  <Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="10dp"
    android:layout_marginLeft="10dp"
    android:layout_marginTop="40dp"
    android:layout_marginEnd="10dp"
    android:layout_marginRight="10dp"
    android:text="start"
    app:layout_constraintEnd_toStartOf="@+id/button2"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/imageView1" />

  <Button
    android:id="@+id/button2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="10dp"
    android:layout_marginLeft="10dp"
    android:layout_marginTop="40dp"
    android:layout_marginEnd="10dp"
    android:layout_marginRight="10dp"
    android:text="stop"
    app:layout_constraintEnd_toStartOf="@+id/button3"
    app:layout_constraintStart_toEndOf="@+id/button1"
    app:layout_constraintTop_toBottomOf="@+id/imageView2" />

  <Button
    android:id="@+id/button3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="10dp"
    android:layout_marginLeft="10dp"
    android:layout_marginTop="40dp"
    android:layout_marginEnd="10dp"
    android:layout_marginRight="10dp"
    android:text="recover"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/button2"
    app:layout_constraintTop_toBottomOf="@+id/imageView3" />

  <ImageView
    android:id="@+id/imageView3"
    android:layout_width="100dp"
    android:layout_height="80dp"
    android:layout_marginStart="10dp"
    android:layout_marginLeft="10dp"
    android:layout_marginTop="40dp"
    android:layout_marginEnd="10dp"
    android:layout_marginRight="10dp"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/imageView2"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/t1" />

</androidx.constraintlayout.widget.ConstraintLayout>

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