Android: How can I make a Drawable array?

Question

How can I make an array that handles some of my images so that I can use it like this?:

ImageView.setImageResource(image[1]);

I hope I explained well...

take a look at this [Android storing R.drawable. ids in XML array][1], its using typed array in array.xml. [1]: http://stackoverflow.com/questions/6945678/android-storing-r-drawable-ids-in-xml-array — Hayi Nukman, Apr 06 '13 at 13:12

score 81 · Accepted Answer · edited Aug 30 '15 at 11:19

81

To do that, you don't want an array of Drawable's, just an array of resource identifiers, because 'setImageResource' takes those identifiers. How about this:

int[] myImageList = new int[]{R.drawable.thingOne, R.drawable.thingTwo};
// later...
myImageView.setImageResource(myImageList[i]);

Or for a resizable version:

ArrayList<Integer> myImageList = new ArrayList<>();
myImageList.add(R.drawable.thingOne);
// later...
myImageView.setImageResource(myImageList.get(i));

edited Aug 30 '15 at 11:19

janos

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answered Jul 28 '10 at 16:56

Walter Mundt

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2

How would you achieve adding images to an int[] but have it search through all files and add instead of explicitly naming each file to add? – Pj Rigor Sep 29 '16 at 02:41

score 12 · Answer 2 · edited Oct 12 '16 at 10:18

First of all you have to get all drawable IDs of your pictures with the following method:

int android.content.res.Resources.getIdentifier(String name, String defType, String defPackage)

For example, you could read all drawable IDs in a loop:

int drawableId = resources.getIdentifier("picture01", "drawable", "pkg.of.your.java.files");
                                          picture02...
                                          picture03...

..and then save them into an Array of Bitmaps:

private Bitmap[] images;
images[i] = BitmapFactory.decodeResource(resources, drawableId);

Now you are able to use your images as array.

score 3 · Answer 3 · answered Feb 06 '17 at 07:55

with respect of @Bevor, you can use getResources() method instead of android.content.res.Resources like this:

ArrayList<Integer> imgArr = new ArrayList<Integer>();

    for(int i=0;i<5;i++){

        imgArr.add(getResources().getIdentifier("picture"+i, "drawable", "pkg.of.your.java.files"));
    }

Usage:

imageView.setImageResource((int)imgArr.get(3));

score 1 · Answer 4 · answered Mar 10 '18 at 10:58

String[] arrDrawerItems = getResources().getStringArray(R.array.arrDrawerItems); // Your string title array

// You use below array to create your custom model like
TypedArray arrDrawerIcons = getResources().obtainTypedArray(R.array.arrDrawerIcons);

for(int i = 0; i < arrDrawerItems.length; i++) {
    drawerItemDataList.add(new DrawerItemModel(arrDrawerItems[i], arrDrawerIcons.getResourceId(i, -1), i == 0 ? true : false));
}
drawerItemAdapter = new DrawerItemAdapter(this, drawerItemDataList);
mDrawerList.setAdapter(drawerItemAdapter);

Đức Lê Công · Answer 5 · 2022-06-03T07:37:32.980

Kotlin code: initialize below class:

private var drawables: Array<Drawable>

initialize drawables in 1 line:

drawables = arrayOf(
            model.getDrawable(R.drawable.welcome_1),
            model.getDrawable(R.drawable.welcome_2),
            model.getDrawable(R.drawable.welcome_3)
        )

my model.getDrawable() is

fun getDrawable(id: Int): Drawable {
    return ResourcesCompat.getDrawable(context.resources, id, context.theme)!!
}

set drawable to imageView

holder.imageView.setImageDrawable(drawables[position])

Android: How can I make a Drawable array?

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