Iterating over drawables in Android

Issue

In Android, I have only found answers as to how to open a single specific Drawable from MainActivity.java, but not how to iterate over each Drawable from res/drawables. The Drawables names do not follow any patterns (e.g. being numbered from 0 to 25), so the answer suggested here sadly doesn't solve my problem. Does anyone know how to do the latter?

Thank you in advance :)

Solution

First, put your drawables into an arrays

<array name="dashboard_item_menu_drawable">
    <item>@drawable/ic_file_green</item>
    <item>@drawable/ic_email_green</item>
    <item>@drawable/ic_linear_scale_green</item>
    <item>@drawable/ic_undo_green</item>
    <item>@drawable/ic_check_circle_green</item>
    <item>@drawable/ic_archive_green</item>
</array>

Then, iterate your array drawables

val icons = ArrayList<Int>()
val arr = resources.obtainTypedArray(R.array.dashboard_item_menu_drawable)
(0 until arr.length()).forEach {
    // get resource id of each drawable
    val icon = arr.getResourceId(it, -1)
    icons.add(icon)
}

Next, recycles resource

arr.recycle()

Then you can use your drawable

iconView.setImageDrawable(ContextCompat.getDrawable(this, icons[index]))

Answered By - M Moersalin