Однорукий бандит

Поиграем в игровой автомат и попробуем выиграть большую сумму.

Подготовим шесть картинок для автомата.

На экран одновременно выводятся три картинки. В качестве рычага послужит кнопка.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FFFFFF"
    tools:context=".MainActivity">

    <LinearLayout
        android:id="@+id/linear"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/image1"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:layout_marginTop="50dp"
            android:src="@drawable/slot5" />

        <ImageView
            android:id="@+id/image2"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:layout_marginLeft="15dp"
            android:layout_marginRight="15dp"
            android:layout_marginTop="50dp"
            android:src="@drawable/slot5" />

        <ImageView
            android:id="@+id/image3"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:layout_marginTop="50dp"
            android:src="@drawable/slot5" />
    </LinearLayout>

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/linear"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="50dp" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/textView"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="50dp"
        android:text="Start" />
</RelativeLayout>

Слот-машина состоит из трёх колёс, которые должны вращаться и выводить картинку пользователю. Создадим отдельный класс Whee на основе Thread.

package ru.alexanderklimov.slot;

public class Wheel extends Thread {

    interface WheelListener {
        void newImage(int img);
    }

    private static int[] drawables = {R.drawable.slot1, R.drawable.slot2, R.drawable.slot3,
            R.drawable.slot4, R.drawable.slot5, R.drawable.slot6};
    public int currentIndex;
    private WheelListener wheelListener;
    private long frameDuration;
    private long startIn;
    private boolean isStarted;

    public Wheel(WheelListener wheelListener, long frameDuration, long startIn) {
        this.wheelListener = wheelListener;
        this.frameDuration = frameDuration;
        this.startIn = startIn;
        currentIndex = 0;
        isStarted = true;
    }

    public void nextImg() {
        currentIndex++;

        if (currentIndex == drawables.length) {
            currentIndex = 0;
        }
    }

    @Override
    public void run() {
        try {
            Thread.sleep(startIn);
        } catch (InterruptedException e) {
        }

        while (isStarted) {
            try {
                Thread.sleep(frameDuration);
            } catch (InterruptedException e) {
            }

            nextImg();

            if (wheelListener != null) {
                wheelListener.newImage(drawables[currentIndex]);
            }
        }
    }

    public void stopWheel() {
        isStarted = false;
    }
}

Запускаем три потока, затем останавливаем их повторным нажатием кнопки. Результат выводится на экран.

package ru.alexanderklimov.slot;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.Random;

public class MainActivity extends AppCompatActivity {

    private TextView infoTextView;
    private ImageView image1, image2, image3;
    private Wheel wheel1, wheel2, wheel3;
    private Button button;
    private boolean isStarted;

    public static final Random RANDOM = new Random();

    public static long randomLong(long lower, long upper) {
        return lower + (long) (RANDOM.nextDouble() * (upper - lower));
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        image1 = findViewById(R.id.image1);
        image2 = findViewById(R.id.image2);
        image3 = findViewById(R.id.image3);
        button = findViewById(R.id.button);
        infoTextView = findViewById(R.id.textView);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (isStarted) {
                    wheel1.stopWheel();
                    wheel2.stopWheel();
                    wheel3.stopWheel();

                    if (wheel1.currentIndex == wheel2.currentIndex && wheel2.currentIndex == wheel3.currentIndex) {
                        infoTextView.setText("You win the big prize");
                    } else if (wheel1.currentIndex == wheel2.currentIndex || wheel2.currentIndex == wheel3.currentIndex
                            || wheel1.currentIndex == wheel3.currentIndex) {
                        infoTextView.setText("Little Prize");
                    } else {
                        infoTextView.setText("You lose");
                    }

                    button.setText("Start");
                    isStarted = false;

                } else {

                    wheel1 = new Wheel(new Wheel.WheelListener() {
                        @Override
                        public void newImage(final int img) {
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    image1.setImageResource(img);
                                }
                            });
                        }
                    }, 200, randomLong(0, 200));

                    wheel1.start();

                    wheel2 = new Wheel(new Wheel.WheelListener() {
                        @Override
                        public void newImage(final int img) {
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    image2.setImageResource(img);
                                }
                            });
                        }
                    }, 200, randomLong(150, 400));

                    wheel2.start();

                    wheel3 = new Wheel(new Wheel.WheelListener() {
                        @Override
                        public void newImage(final int img) {
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    image3.setImageResource(img);
                                }
                            });
                        }
                    }, 200, randomLong(150, 400));

                    wheel3.start();

                    button.setText("Stop");
                    infoTextView.setText("");
                    isStarted = true;
                }
            }
        });
    }
}

Источник: Learn to create a Slot Machine for Android

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