How to clear an ImageView in Android?

StackOverflow https://stackoverflow.com/questions/2859212

Question

I am reusing ImageViews for my displays, but at some point I don't have values to put it.

So how to clear an ImageView in Android?

I've tried:

mPhotoView.invalidate();
mPhotoView.setImageBitmap(null);

None of them have cleared the view, it still shows previous image.

Was it helpful?

Solution

I used to do it with the dennis.sheppard solution:

viewToUse.setImageResource(0);

it works but it is not documented so it isn't really clear if it effects something else in the view (you can check the ImageView code if you like, i didn't).

I think the best solution is:

viewToUse.setImageResource(android.R.color.transparent);

I like this solution the most cause there isn't anything tricky in reverting the state and it's also clear what it is doing.

OTHER TIPS

I had a similar problem, where I needed to basically remove ImageViews from the screen completely. Some of the answers here led me in the right direction, but ultimately calling setImageDrawable() worked for me: 

imgView.setImageDrawable(null);

(As mentioned in the comment, such usage is documented in the official docs: ImageView#setImageDrawable.)

I know this is old, but I was able to accomplish this with 

viewToUse.setImageResource(0);

Doesn't seem like it should work, but I tried it on a whim, and it worked perfectly.

It sounds like what you want is a default image to set your ImageView to when it's not displaying a different image. This is how the Contacts application does it:

if (photoId == 0) {
    viewToUse.setImageResource(R.drawable.ic_contact_list_picture);
} else {
    // ... here is where they set an actual image ...
}

I tried this for to clear Image and DrawableCache in ImageView

ImgView.setImageBitmap(null);
ImgView.destroyDrawingCache();

I hope this works for you !

If none of these solutions are clearing an image you've already set (especially setImageResource(0) or setImageResources(android.R.color.transparent), check to make sure the current image isn't set as background using setBackgroundDrawable(...) or something similar.

Your code will just set the image resource in the foreground to something transparent in front of that background image you've set and will still show.

Hey i know i am extremely late to this answer, but just thought i must share this,

The method to call when u reset the image must be the same method that u called while u were setting it.

When u want to reset the image source @dennis.sheepard answer works fine only if u are originally setting the image in the bitmap using setImageResource()

for instance,

i had used setImageBitmap() and hence setting setImageResource(0) didn work, instead i used setImageBitmap(null).

I was able to achieve this by defining a drawable (something like blank_white_shape.xml):

<shape xmlns:android="http://schemas.android.com/apk/res/android"       
       android:shape="rectangle">
    <solid android:color="@android:color/white"/>
</shape>

Then when I want to clear the image view I just call 

 imageView.setImage(R.drawable.blank_white_shape);

This works beautifully for me!

As kwasi wrote and golu edited, you can use transparent, instead of white:

File drawable/transparent.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
    <solid android:color="@android:color/transparent"/>
</shape>

Inside an activity, view, etc:

view.setImageResource(R.drawable.transparent);

For ListView item image you can set ImageView.setVisibility(View.INVISIBLE) or ImageView.setImageBitmap(null) in list adapter for "no image" case.

To remove the image in ImageView use:

title_image.setImageResource(-1);

it works for me

If you use the support library, you get AppCompatImageView instead of ImageView , which supports setImageResource(0) on all devices, so you should be fine with using it the same way as using setImageDrawable(null) and setImageBitmap(null)

Otherwise, it should work fine starting from some Android version. According to the code of Android and according to my tests, I think it should be safe to use setImageResource(0) from Android API 22 (5.1). You can see the Android code of API 22 vs API 21, here

I was facing same issue i changed background color of view to layout background color u can do like this:

 edit_countflag.setBackgroundColor(Color.parseColor("#ffffff"));

//then set the image

edit_countflag.setImageResource(R.drawable.flag_id);

This works for me. 

emoji.setBackground(null);

This crashes in runtime.

viewToUse.setImageResource(android.R.color.transparent);

Can i just point out what you are all trying to set and int where its expecting a drawable.

should you not be doing the following?

imageview.setImageDrawable(this.getResources().getDrawable(R.drawable.icon_image));

imageview.setImageDrawable(getApplicationContext().getResources().getDrawable(R.drawable.icon_profile_image));
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