android: dynamically change FAB(Floating Action Button) icon from code

Question

How to change FAB icon in an Activity during runtime. I have this code ->

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fabMainActivity);

I know this is possible using fab.setBackgroundDrawable(); but i am a newbie to android, don't understand how to do this.

Any help will be highly appreciated.

Thanks

I am unable to do that.. as it expect a drawable.. and idk how to make a drawable ?? — Hirdesh Vishwdewa, Oct 15 '15 at 05:45
Have you added icon in Drawable folder? if yes then just pass `R.drawable.` to `setBackground` method otherwise first add icon to drawable folder then do same — ρяσѕρєя K, Oct 15 '15 at 05:46
passing `R.drawable.` to `fab.setBackgroundDrawable();` gives an error... `setBackgroundDrawable (android.graphics.drawable.Drawable) in FloatingActionButton can not be applied to (int)` — Hirdesh Vishwdewa, Oct 15 '15 at 05:51
Ok do it as: `Drawable drawable = getResources().getDrawable(R.drawable. icon_name); fab .setBackground(dr`awable)l — ρяσѕρєя K, Oct 15 '15 at 06:01
Yes its working, but `getDrawable` is deprecated... in API level 22 instead we should use `getDrawable (int id, Resources.Theme theme)` — Hirdesh Vishwdewa, Oct 15 '15 at 06:11

Jithin Sunny · Accepted Answer · 2016-03-29T09:58:39.397

101

Changing FloatingActionButton source:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            floatingActionButton.setImageDrawable(getResources().getDrawable(R.drawable.ic_full_sad, context.getTheme()));
        } else {
            floatingActionButton.setImageDrawable(getResources().getDrawable(R.drawable.ic_full_sad));
    }

This can be replaced by following code from the support library instead:

floatingActionButton.setImageDrawable(ContextCompat.getDrawable(getContext(), R.drawable.ic_full_sad));

edited Mar 29 '16 at 09:58

answered Oct 15 '15 at 06:28

Jithin Sunny

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Try to avoid `getApplicationContext` as much as possible – zozelfelfo Oct 15 '15 at 06:30
@zozelfelfo why is that? – SaKet Jan 27 '16 at 18:31
7

That's not necessarily true. It depends on what you are trying to accomplish. Activity context can cause memory leaks depending on how you are using it. Typically it's the activity context that is troublesome because it can cause memory leaks. If the activity dies and another object has a reference to that activity via the context it can't be garbage collected. However, there are some cases when you want to use the activity context over the app context, [ex](http://developer.android.com/reference/android/content/ContextWrapper.html#getApplicationContext%28%29). – sam_c Feb 08 '16 at 21:14
1

How can I set an icon to an Extended FAB programmatically? – Mark Delphi May 07 '20 at 10:19

score 21 · Answer 2 · answered May 25 '16 at 18:58

21

If you are using the Support Library:

floatingActionButton.setImageResource(R.drawable.icon_name)

answered May 25 '16 at 18:58

PaulT

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This should be the marked answer since with this use can use vectors – Ali Bdeir Nov 30 '16 at 18:37

score 18 · Answer 3 · answered Feb 29 '16 at 10:23

18

Or you use the Support Library:

floatingActionButton.setImageDrawable(ContextCompat.getDrawable(getContext(), R.drawable.ic_full_sad));

answered Feb 29 '16 at 10:23

Paul Spiesberger

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score 2 · Answer 4 · edited Oct 15 '21 at 07:59

2

Assume that you will use the image ic_arrow_forward.png as your fab's background:

fab.setImageResource(R.mipmap.ic_arrow_forward);

edited Oct 15 '21 at 07:59

hata

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answered Feb 02 '17 at 11:46

EckoTan

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If you use R.drawable.* or R.mipmap.*, using `setImageResource` is far more straight forward. I think this answer is the best. – hata Oct 15 '21 at 08:01

score 1 · Answer 5 · answered Oct 31 '16 at 08:35

What I am using as follows,

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab_btn);

// State 1 -on

fab.setImageDrawable(ContextCompat.getDrawable(getActivity(), R.drawable.fab_on));

// State  2 - off

fab.setImageDrawable(ContextCompat.getDrawable(getActivity(), R.drawable.fab_off));

android: dynamically change FAB(Floating Action Button) icon from code

5 Answers5

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