how to get images dynamically from drawable folder

Question

I have an array like this.

int image[] = {R.drawable.d002_p001,R.drawable.d002_p002,R.drawable.d002_p003,
                   R.drawable.d002_p004,R.drawable.d002_p005,R.drawable.d002_p006};

Right now I have 6 images so I am statically given the name.

If I have some 50 images I cant give each and every file name in array so it needs to be dynamic how can I achieve this.

Solution 1

You can use getIdentifier()

for (int j = 1; j < 6; j++) {
   Drawable drawable = getResources().getDrawable(getResources()
                  .getIdentifier("d002_p00"+j, "drawable", getPackageName()));
}

Solution 2

You can also use this:

int res = getResources().getIdentifier("<your pakecgename>:drawable/abc", null, null);

Solution 3

Something like this could work

Field[] drawables = android.R.drawable.class.getFields();
for (Field f : drawables) {
    try {
        System.out.println("R.drawable." + f.getName());
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Solution 4

Use the following line for getting drawable dynamically:

Drawable drawable = this.getResources().getDrawable(R.drawable.yourDrawableID);

This will give you the desired Drawable.

Solution 5

public static Drawable getImage(Context context, String name) {
        return context.getResources().getDrawable(context.getResources().getIdentifier(name, "drawable", context.getPackageName()));
}

View more solutions

Comments

[Goofy]

its showing me error dude "R.drawable.d002_p00" +i; cannot convert from int to string

[maysi]

this answer is really bad... have you learned java?? A String can not be assigned to a int variable... and a int cannot be added to an string without using String.valueof()...

[uniruddh]

yourDrawableID is actual ID value that you have specified for element in your layout(xml) file.

[user4500]

This matched for me to get all drawables. I put all in a Hashmap for easier access later: KEY=f.getInt(f.getName()) + VALUE=f.getName()

[Srujan Barai]

How to save from that drawable to a String array?

[The Student]

Requires API level 21 for getDrawable

[SleepProgger]

@TomBrito Use ContextCompat.getDrawable(context, res). See stackoverflow.com/a/34132342/4830897

[Pj Rigor]

How would you do this if you are looking for any file with the extension ".jpg" and for an unknown number of files? @LalitPoptani

[OneCricketeer]

Using "drawable", getPackageName() instead of null, null is less error prone

[Ramani Hitesh]

Mr.dilipkaklotar some code wrong so change our here and update your post

[Admin]

Here i have created array dices for images in drawable folder.And i have accessed images randomly by the generation of random variable titled as randnum( from the code).Here i am keep on changing already existing image(id is imageView2 from the code) for each random number.Whenever we tap a buttom images will be randomly generated

[Prvt_Yadav]

Just a tip use your class name at the place of android. I wasted hours.