Questions about image random

Question

Hello I am a beginner learning Java I am trying to create a random image output The code I made stops with only one image coming out What I want is to keep showing the images at random Which code should I add? Please help me

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


        ImageView imageView_1 = findViewById(R.id.imageView_1);
      

        int[] images = {R.drawable.img_1, R.drawable.img_2, R.drawable.img_3, R.drawable.img_4, R.drawable.img_5};

            Random rand = new Random();

            imageView_1.setImageResource(images[rand.nextInt(images.length)]);
        
        }
}

You want image to be changed for every few seconds ? Is that what you want ? — AgentP, Jun 26 '20 at 04:45
You will need to write code that changes the image periodically. This may help: https://stackoverflow.com/questions/6425611/android-run-a-task-periodically — Henry, Jun 26 '20 at 04:53
What I want to make is that the image changes randomly every second. — hyperion0205, Jun 26 '20 at 08:03

Yonatan · Answer 1 · 2020-06-26T15:03:32.333

Add this method first

 private Runnable showImageRandom=new Runnable() {
    @Override
    public void run() {

        Random rand = new Random();

        imageView.setImageResource(images[rand.nextInt(images.length)]);
        handler.postDelayed(this,2000);

    }
};

then add this handler in your OnCreate

 handler=new Handler();
 handler.postDelayed(showRandomImage,2000);

2000 is time delay

int[] images = {R.drawable.img_1, R.drawable.img_2, R.drawable.img_3, 
 R.drawable.img_4, R.drawable.img_5};
 ImageView imageView_1;
 Handler handler;
 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


     imageView_1 = findViewById(R.id.imageView_1);
    handler=new Handler();
    handler.postDelayed(showRandomImage,1000);
  

            
    }

private Runnable showImageRandom=new Runnable() {
 @Override
 public void run() {

    Random rand = new Random();

    imageView.setImageResource(images[rand.nextInt(images.length)]);
    handler.postDelayed(this,2000);

  }
  };

please upvote if it was helpful otherwise tell me the problem. I can help you — Yonatan, Jun 26 '20 at 08:10

Noban Hasan · Answer 2 · 2020-06-26T06:58:23.957

0

Try this Hope this will work. You can print the randomNumber is generating or not.

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


        ImageView imageView_1 = findViewById(R.id.imageView_1);
      

        int[] images = {R.drawable.img_1, R.drawable.img_2, R.drawable.img_3, R.drawable.img_4, R.drawable.img_5};

        int randomNumber = new Random().nextInt(images.length);
            

        imageView_1.setImageDrawable(getResources().getDrawable(images[randomNumber]));
        
        }
}

edited Jun 26 '20 at 06:58

answered Jun 26 '20 at 06:31

Noban Hasan

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This code also comes up with only one image and stops Thanks for the comment – hyperion0205 Jun 26 '20 at 07:50

Questions about image random

2 Answers2