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android – converting drawable resource image into bitmap

Posted by: admin March 10, 2020 Leave a comment


I am trying to use the Notification.Builder.setLargeIcon(bitmap) that takes a bitmap image. I have the image I want to use in my drawable folder so how do I convert that to bitmap?

How to&Answers:

You probably mean Notification.Builder.setLargeIcon(Bitmap), right? 🙂

Bitmap largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.large_icon);

This is a great method of converting resource images into Android Bitmaps.


Drawable myDrawable = getResources().getDrawable(R.drawable.logo);
Bitmap myLogo = ((BitmapDrawable) myDrawable).getBitmap();

Since API 22 getResources().getDrawable() is deprecated, so we can use following solution.

Drawable vectorDrawable = VectorDrawableCompat.create(getResources(), R.drawable.logo,  getContext().getTheme());
Bitmap myLogo = ((BitmapDrawable) vectorDrawable).getBitmap();


Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.my_drawable);

Context can be your current Activity.


Here is another way to convert Drawable resource into Bitmap in android:

Drawable drawable = getResources().getDrawable(R.drawable.input);
Bitmap bitmap = ((BitmapDrawable)drawable).getBitmap();


First Create Bitmap Image

Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.image);

now set bitmap in Notification Builder Icon….



In res/drawable folder,

1. Create a new Drawable Resources.

2. Input file name.

A new file will be created inside the res/drawable folder.

Replace this code inside the newly created file and replace ic_action_back with your drawable file name.

<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
    android:tint="@color/color_primary_text" />

Now, you can use it with Resource ID, R.id.filename.