Change ImageButton Drawable automatically

Question

I have 320 images in drawable directory and ImageButton so when it's clicked, the Image have to be changed randomly, the image name is like this file_xyz, the xyz are numbers each one generated randomly using this code:

rand = new Random(System.currentTimeMillis());
x = rand.nextInt(3 - 0) + 0;
y = rand.nextInt(7 - 0) + 0;
z = rand.nextInt(9 - 0) + 0;
return "shape_" + x+ y+ z;

so this gives me a string which I want to use it to change the resource of ImageButton, so how to apply this and make the changes randomly in separate times?

score 3 · Accepted Answer · answered Jan 13 '17 at 19:53

3

try this:

   int resID = getResources().getIdentifier(pDrawableName , "drawable", getPackageName());    
    imageview.setBackgroundResource(resID);

where String pDrawableName = file_xyz is your image name

answered Jan 13 '17 at 19:53

rafsanahmad007

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I am trying this but when I write this code the `getResources()` don't show only `getClass()` @rafsanahmad007 – Jan 13 '17 at 19:58
use `getApplicationContext().getResources()` – rafsanahmad007 Jan 13 '17 at 19:59
the same with `getApplicationContext()` @rafsanahmad007 – Jan 13 '17 at 20:06
are u using it in fragment? – rafsanahmad007 Jan 13 '17 at 20:08
then try `getActivity().getResources()`...instead – rafsanahmad007 Jan 13 '17 at 20:14

score 1 · Answer 2 · answered Jan 13 '17 at 20:52

1

If you first create the exact filename string as in the drawable folder (I'll call it String image), you can do the following:

ImageButton imageButton = (ImageButton) findViewById(R.id.image_button);
imageButton.setImageResource(R.drawable.image);

Where image_button is whatever you have set as the ID for your image button.

answered Jan 13 '17 at 20:52

Anna Vos

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Have you checked whether the image name generated exactly matches the image name in your drawable folder? – Anna Vos Jan 13 '17 at 21:57

Change ImageButton Drawable automatically

2 Answers2