How to convert a Drawable image from resources to a Bitmap

Question

I were trying to attach images from Drawable to an email (from my app to Gmail app)

I have tried the next code:

        Intent emailintent2 = new Intent(android.content.Intent.ACTION_SEND_MULTIPLE);
        emailintent2.setType("image/*");
        emailintent2.putExtra(Intent.EXTRA_EMAIL, emailaddress2);
        emailintent2.putExtra(Intent.EXTRA_SUBJECT, CorAsunto);
        emailintent2.putExtra(Intent.EXTRA_TEXT, message2);

        ArrayList<Uri> uris = new ArrayList<Uri>();
        uris.add(Uri.parse("android.resource://" + getPackageName() + "/" + R.drawable.image1));
        uris.add(Uri.parse("android.resource://" + getPackageName() + "/" + R.drawable.image2));

        emailintent2.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
        startActivity(emailintent2);

But when I attach the image to the email I get the attach without the extension ".png" and thats is a big problem.

So I think in try to convert this Drawable images to Bitmap and also I think that the ArrayList will have to be Bitmap. I think that I will get the image has image defined in the attachment.

If it is possible, can someone tell me how to do it? Convert to Bitmap, add to Arraylist and attach the image.

If I am wrong in all what I said, can someone give me a solution? I need to attach the images from Drawable to the email with the extension (.png).

Copying and pasting your title into google: stackoverflow.com/questions/8717333 — dymmeh
– dymmeh, Commented Mar 6, 2013 at 18:59
check stackoverflow.com/questions/8717333/… for latest API — AndyW
– AndyW, Commented Jul 29, 2017 at 0:35

Harish Gyanani · Accepted Answer · 2016-12-21 15:19:08Z

59

There are 3 ways to perform conversion:

Set the ImageView with resource image

imageView.setImageResource(R.drawable.icon);

and then get the bitmap from imageView

Bitmap bitmap = ((BitmapDrawable)image.getDrawable()).getBitmap();

Get the drawable resource directly by Resource ID

Bitmap icon = BitmapFactory.decodeResource(getResources(),R.drawable.profile_circle);

Set the image on the ImageView then convert it into Bitmap (works for svg/VectorDrawable too)

ImageView imgView = (ImageView) findViewById(R.id.ImageView);
imgView.setImageResource(R.drawable.abc_image);
z.setDrawingCacheEnabled(true);
Bitmap bitmap = Bitmap.createBitmap(v.getDrawingCache());

edited Dec 21, 2016 at 15:19

Harish Gyanani

1,4053 gold badges24 silver badges43 bronze badges

answered May 13, 2015 at 6:35

Droid_Mechanic

1,47414 silver badges13 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

hakki · Accepted Answer · 2023-07-05 15:11:03Z

35

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

Also It can be defined in an XML file with the <bitmap> element.

2023 Approach

After 10 years from my first answer:

Drawable drawable = ContextCompat.getDrawable(context, R.drawable.your_drawable);

if (drawable instanceof BitmapDrawable) {
    // If your drawable is already a BitmapDrawable, you can get the bitmap directly
    Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
} else if (drawable instanceof VectorDrawable || drawable instanceof GradientDrawable) {
    // If it's another type of drawable (like VectorDrawable), you need to create a bitmap and draw the drawable onto it
    Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),
                                        drawable.getIntrinsicHeight(),
                                        Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
    drawable.draw(canvas);
}

edited Jul 5, 2023 at 15:11

answered Mar 6, 2013 at 19:03

hakki

1

2 Comments

M. Usman Khan Over a year ago

this should be more efficient than other solutions, but I see that getDrawable is deprecated

Pochmurnik Over a year ago

This doesn't work. I get ClassCastException: android.graphics.drawable.ColorDrawable cannot be cast to android.graphics.drawable.BitmapDrawable

Nipun Gogia · Accepted Answer · 2013-03-06 19:12:57Z

10

here is the piece of code , just check it out:

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

answered Mar 6, 2013 at 19:12

Nipun Gogia

1,8561 gold badge11 silver badges17 bronze badges

Comments

Mahmoud · Accepted Answer · 2015-01-29 08:48:30Z

The direct way is :

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

You can configure the bitmap more if you define it in .xml drawable file as :

<?xml version="1.0" encoding="utf-8"?>
<bitmap
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:src="@[package:]drawable/drawable_resource"
    android:antialias=["true" | "false"]
    android:dither=["true" | "false"]
    android:filter=["true" | "false"]
    android:gravity=["top" | "bottom" | "left" | "right" | "center_vertical" |
                      "fill_vertical" | "center_horizontal" | "fill_horizontal" |
                      "center" | "fill" | "clip_vertical" | "clip_horizontal"]
    android:mipMap=["true" | "false"]
    android:tileMode=["disabled" | "clamp" | "repeat" | "mirror"] />

Rakesh · Accepted Answer · 2015-02-06 09:31:18Z

6

Bitmap icon = BitmapFactory.decodeResource(mContext.getResources(),
            R.drawable.ic_launcher);

Where mContext is your activity Context.

answered Feb 6, 2015 at 9:31

Rakesh

2,80032 silver badges28 bronze badges

Comments

Alon · Accepted Answer · 2019-03-14 11:46:21Z

2

public Bitmap convertToBitmap(Drawable drawable, int widthPixels, int heightPixels) {
    Bitmap mutableBitmap = Bitmap.createBitmap(widthPixels, heightPixels, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(mutableBitmap);
    drawable.setBounds(0, 0, widthPixels, heightPixels);
    drawable.draw(canvas);

    return mutableBitmap;
}

from https://msol.io/blog/android/android-convert-drawable-to-bitmap/ worked for me.

answered Mar 14, 2019 at 11:46

Alon

9831 gold badge7 silver badges19 bronze badges

1 Comment

Andrey Over a year ago

Thank you. This method allows get bitmap from vector drawable, whereas other only from bitmap drawable.

Sahil Bansal · Accepted Answer · 2020-01-04 11:04:12Z

1

METHOD 1 : Either you can directly convert to bitmap like this

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

METHOD 2 : You can even convert the resource into the drawable and from that you can get bitmap like this

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

For API > 22 getDrawable method moved to the ResourcesCompat class so for that you do something like this

Bitmap myLogo = ((BitmapDrawable) ResourcesCompat.getDrawable(context.getResources(), R.drawable.logo, null)).getBitmap();

answered Jan 4, 2020 at 11:04

Sahil Bansal

7398 silver badges9 bronze badges

Comments

user7481357 · Accepted Answer · 2020-12-11 13:49:05Z

1

    public Bitmap getBitmap(@DrawableRes final int resId) {
        Drawable drawable = getResources().getDrawable(resId);;
        Canvas canvas = new Canvas();
        Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),
                drawable.getIntrinsicHeight(),
                Bitmap.Config.ARGB_8888);
        canvas.setBitmap(bitmap);
        drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
        drawable.draw(canvas);
        return bitmap;
    }

answered Dec 11, 2020 at 13:49

user7481357

112 bronze badges

1 Comment

Bink Over a year ago

It is often helpful to add some commentary when you post code.

ajw · Accepted Answer · 2020-02-07 08:20:40Z

-1

Simple as this

val bitmap = BitmapFactory.decodeResource(resources, R.drawable.some_image)

I got null for vector images but png image resources works fine.

answered Feb 7, 2020 at 8:20

ajw

2,76427 silver badges33 bronze badges

Collectives™ on Stack Overflow

How to convert a Drawable image from resources to a Bitmap

9 Answers 9

Comments

2023 Approach

2 Comments

Comments

Comments

Comments

1 Comment

Comments

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

9 Answers 9

Comments

2023 Approach

2 Comments

Comments

Comments

Comments

1 Comment

Comments

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related