CODEWITHSUNDEEP
androidimageview
Thanh Duy
Thanh Duy

Reputation: 13

How to check if image of imageview is not changed

I have a problem like this in ImageView, by default I set ivImage.setImageResource(R.drawable.avatar) And when I click button "Save", if image in ImageView is not changed, it should not save image. I tried this, but it's not working

private Drawable oldDrawable;

in onCreate()

oldDrawable = imgAvatarDoctor.getDrawable();

and in button click

 if (imgAvatarDoctor.getDrawable() == oldDrawable) {
            isNoError = false;
        }

So how can i fix that? thanks so much

Upvotes: 0

Views: 1705

Answers (4)

W4R10CK
W4R10CK

Reputation: 5550

you can use bitmap instead,

private Bitmap oldDrawable;

oldDrawable = ((BitmapDrawable) ivImage.getDrawable()).getBitmap();

 if (oldDrawable == oldDrawable) {
        isNoError = false;
    }

Upvotes: 2

DsD
DsD

Reputation: 1121

While setting the image, set any tag to the image 

image.setTag(res); //here, res is drawableID

While checking the ID of image, you can use this tag to compare:

int oldImage = image.getTag();  //oldImage will be same as drawable ID

Now you can compare oldImage with drawable ID of that image and check whether its updated or not.

Upvotes: 0

Anjali
Anjali

Reputation: 2535

Use setTag and getTag for comparison of your drawable like this:

initially set tag of your imageview to 0 in your onCreate 

imgAvatarDoctor.setTag("0");

and whenever you change the imageview you can change the tag for something other than 0 like:

imgAvatarDoctor.setTag("UpdatedTag");

Now on your click listener you can do this:

if (imgAvatarDoctor.getTag().equalsIgnoreCase("UpdatedTag")){
//your image view is updated
} else {
// your image view is not update
}

Happy Coding !!!!!

Upvotes: 5

niksya
niksya

Reputation: 291

You can use a flag to trigger image change. In onCreate()

imageChanged = false;

And in function which gets changed image(i.e. onActivityResult), update this flag as 

imageChanged = true;

then on save button click you can easily check for this flag :

if(imageChanged)
   //save image
else
   //pass

Upvotes: 2

Related Questions