How to show random images on Android?

Question

I have a number of images in my directory. I want to show random images in ANDROID. Please anyone provide me with an example.

Answer 1

I don't have an example but I can provide you an idea.

1. Build a list of images in an array
2. Generate a random number between 0 to 1 less than the number of images in folder
3. Use the random number in step 2 as an index to the array and pick up the image for display.

Answer 2

You have to combine some things. First you need an ImageView in order to display an image on the Android phone.

Then I would take a look into a random number generator (e.g. http://download-llnw.oracle.com/javase/6/docs/api/java/util/Random.html) so that you can get a random number.

By combining these to things, you can randomly select a picture from a list of available pictures and display it using the ImageView.

Answer 3

Assume that your images are named img1.png, img2.png, and so on, and they are located in res/drawable folder.

Then you can use the following code to randomly set an image in an ImageView

ImageView imgView = new ImageView(this);
Random rand = new Random();
int rndInt = rand.nextInt(n) + 1; // n = the number of images, that start at idx 1
String imgName = "img" + rndInt;
int id = getResources().getIdentifier(imgName, "drawable", getPackageName());  
imgView.setImageResource(id);