What is quick way to check if ImageView has bitmap assigned?

Question

I need to quickly and safely check if an android.widget.ImageView currently has a Bitmap of non zero value attached. What is a quick way to do this.

Update my image view is set initially drawable set to "logo.png" so if I know that it is currently set to logo.png than I know that the bitmap has not yet been set. So how can I check if background drawable is currently logo.png

Thanks

May be this can help http://stackoverflow.com/questions/9113895/how-to-check-if-an-imageview-is-attcahed-with-image-in-android — Serj Lotutovici, Dec 27 '12 at 03:26

score 12 · Answer 1 · edited Sep 16 '16 at 12:53

12

Use getDrawable() method, if it return null then nothing assigned

if( mImageView.getDrawable() != null){

  //Image Assigned

}else{
  //nothing assigned

}

edited Sep 16 '16 at 12:53

Siv

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answered Dec 27 '12 at 05:18

Changdeo Jadhav

706
9
23

In the queston, he mentioned the imageview is already attached with default "logo.png". If you use your method. It will not return null. since "logo.png" is there already!! – Anees Deen Oct 28 '14 at 10:28
I have another situation here, where I have a background color set. The same, getDrawable does not return null even though no src is set. – Oliver Hausler Jan 19 '15 at 19:36

score 1 · Answer 2 · edited Dec 30 '15 at 18:00

Assign ImageView to variable in onCreate:

someImage = (ImageView) findViewById(R.id.imageView);

Then a simple if-else statement:

Bitmap bm = ((BitmapDrawable) someImage.getDrawable()).getBitmap();

                boolean hasDrawable = (bm != null);
                if(hasDrawable) 
                {
                    hasImage();
                }
                else 
                {
                    Toast.makeText(AppSettings.this, "No Bitmap", Toast.LENGTH_SHORT).show();
                }

score 1 · Answer 3 · edited Apr 22 '20 at 21:07

1

Kotlin Extension Solution:

Add this to simplify checks and make it more readable

fun ImageView.hasDrawable() = drawable != null

and then call

myView.hasDrawable()

edited Apr 22 '20 at 21:07

Paul Roub

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answered Apr 22 '20 at 20:51

Gibolt

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score 0 · Answer 4 · edited May 23 '17 at 11:53

0

Get Bitmap attached to ImageView

Check this out.

It looks like you have to create a bitmap from the ImageView and check to see if it is null.

imageView.setDrawingCacheEnabled(true);    
imageView.buildDrawingCache(true);
Bitmap bitmap = Bitmap.createBitmap(imageView.getDrawingCache());
imageView.setDrawingCacheEnabled(false);

edited May 23 '17 at 11:53

Community

1
1

answered Dec 27 '12 at 04:14

Wenger

989
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1

Ok. How can I check quickly if my image still has src="logo.jpg" or a bitmap that I set later. I need to do this really fast. Is there a way to check if the current background image is logo.jpg? – NextDroid Dec 27 '12 at 04:17
I am also looking for the answer..The same scenario I have – Anees Deen Oct 28 '14 at 10:29

What is quick way to check if ImageView has bitmap assigned?

4 Answers4