Igrača kocka: MainActivity.java

package com.example.Kalkulator;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Vibrator;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.Toast;

import java.util.Random;

public class MainActivity3 extends AppCompatActivity implements AdapterView.OnItemSelectedListener {

    int spinner_selected = 0;

    ImageView kocka;

    Spinner spinner3;

    Random random = new Random();

    void baciKocku(){

        int i = random.nextInt(6) + 1; // Ide od 0 - 5 bez + 1 na kraju, zato treba ici +1.

        Animation animation = AnimationUtils.loadAnimation(this, R.anim.rotate);

        kocka.startAnimation(animation);

        switch(i){

            case 1:
                kocka.setImageResource(R.drawable.one);
                SingleToast.show(getApplicationContext(), "1", Toast.LENGTH_SHORT);
                break;

            case 2:
                kocka.setImageResource(R.drawable.two);
                SingleToast.show(getApplicationContext(), "2", Toast.LENGTH_SHORT);
                break;

            case 3:
                kocka.setImageResource(R.drawable.three);
                SingleToast.show(getApplicationContext(), "3", Toast.LENGTH_SHORT);
                break;

            case 4:
                kocka.setImageResource(R.drawable.four);
                SingleToast.show(getApplicationContext(), "4", Toast.LENGTH_SHORT);
                break;

            case 5:
                kocka.setImageResource(R.drawable.five);
                SingleToast.show(getApplicationContext(), "5", Toast.LENGTH_SHORT);
                break;

            case 6:
                kocka.setImageResource(R.drawable.six);
                SingleToast.show(getApplicationContext(), "6", Toast.LENGTH_SHORT);
                break;
        }
    }

    public void otvoriMainActivity(){

        Vibrator v = (Vibrator) getSystemService(VIBRATOR_SERVICE);

        v.vibrate(1);

        Intent intent = new Intent(this, MainActivity.class);

        startActivity(intent);
    }

    public void otvoriMainActivity2(){

        Vibrator v = (Vibrator) getSystemService(VIBRATOR_SERVICE);

        v.vibrate(1);

        Intent intent = new Intent(this, MainActivity2.class);

        startActivity(intent);
    }

    public void otvoriMainActivity4(){

        Vibrator v = (Vibrator) getSystemService(VIBRATOR_SERVICE);

        v.vibrate(1);

        Intent intent = new Intent(this, MainActivity4.class);

        startActivity(intent);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);

        Vibrator v = (Vibrator) getSystemService(VIBRATOR_SERVICE);

        final MediaPlayer bacanje_kocke = MediaPlayer.create(this, R.raw.shake_dice);

        kocka = findViewById(R.id.kocka);

        spinner3 = findViewById(R.id.spinner3);

        ArrayAdapter<CharSequence> adapter3 = ArrayAdapter.createFromResource(this, R.array.menu_MainActivity3, R.layout.dropdown_button);

        adapter3.setDropDownViewResource(R.layout.dropdown_item);

        spinner3.setAdapter(adapter3);

        spinner3.setOnItemSelectedListener(this);

        kocka.setOnClickListener(view -> {

            if(!bacanje_kocke.isPlaying()) {

                v.vibrate(1);

                bacanje_kocke.start();

                baciKocku();
            }

            else{

                SingleToast.show(getApplicationContext(), "Kocka se još baca!", Toast.LENGTH_SHORT);
            }
        });
    }

    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

        String text = parent.getItemAtPosition(position).toString();

        if (spinner_selected > 0) {

            switch (text) {

                case "\uD83E\uDDEE":

                    otvoriMainActivity();

                    SingleToast.show(getApplicationContext(), text, Toast.LENGTH_SHORT);

                    break;

                case "\uD83D\uDCCF":

                    otvoriMainActivity2();

                    SingleToast.show(getApplicationContext(), text, Toast.LENGTH_SHORT);

                    break;

                case "\uD83E\uDE99":

                    otvoriMainActivity4();

                    SingleToast.show(getApplicationContext(), text, Toast.LENGTH_SHORT);

                    break;
            }
        }

        spinner_selected++;
    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {

    }
}