Image-Timer

MainActivity.java

package com.example.android.game2;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ImageView;

import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;

public class MainActivity extends AppCompatActivity {
    ImageView[] images;

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

        images[1]=(ImageView) findViewById(R.id.img1);
        images[2]=(ImageView) findViewById(R.id.img2);
        images[3]=(ImageView) findViewById(R.id.img3);
        images[4]=(ImageView) findViewById(R.id.img4);
        images[5]=(ImageView) findViewById(R.id.img5);
        images[6]=(ImageView) findViewById(R.id.img6);
        images[7]=(ImageView) findViewById(R.id.img7);
        images[8]=(ImageView) findViewById(R.id.img8);
        images[9]=(ImageView) findViewById(R.id.img9);

        Timer timer=new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                Random r=new Random();
                int RandomNum=r.nextInt(9)+1;

                    for (int i=1;i<10;i++){
                        if (i==RandomNum)
                            images[i].setImageResource(R.drawable.testo);
                        else
                            images[i].setImageResource(0);
                    }
            }
        }, 5000, 2000);

    }


}