Android Custom Icon ShareActionProvider?

android, shareactionprovider

Solution

Edit / Short answer: if using AppCompat's ShareActionProvider, just provide a new `actionModeShareDrawable` in your theme definition.

<style name="MyTheme" parent="Theme.AppCompat">
    <item name="actionModeShareDrawable">@drawable/my_share_drawable</item>
</style>

If not using AppCompat, then this resource is defined for Lollipor or newer, but not for previous versions.

Below is answer for the native `ShareActionProvider` (which was the original scope of this question).

To change this image, you should change the value of `actionModeShareDrawable` for your app's theme. Take a look at the `ShareActionProvider`'s `onCreateActionView()` method:

public View onCreateActionView() {
    // Create the view and set its data model.
    ...

    // Lookup and set the expand action icon.
    TypedValue outTypedValue = new TypedValue();
    mContext.getTheme().resolveAttribute(R.attr.actionModeShareDrawable, outTypedValue, true);
    Drawable drawable = mContext.getResources().getDrawable(outTypedValue.resourceId);
    ...  

Unfortunately this attribute is not public in the Android framework (though it is if using compatibility libraries, such as AppCompat or ActionBarSherlock). In that case, it's just a matter of overriding that value for the theme.

If you are using neither of these libraries, the only solution (that I know of) is to create a subclass of `ShareActionProvider` and reimplement the `onCreateActionView()` method. You can then use whatever drawable you want instead.

EDIT However this is further complicated by the fact that the implementation of `onCreateActionView()` uses other classes that are not public either. To avoid duplicating a lot of code, you can just change the icon via reflection, like this:

public class MyShareActionProvider extends ShareActionProvider
{
    private final Context mContext;

    public MyShareActionProvider(Context context)
    {
        super(context);
        mContext = context;
    }

    @Override
    public View onCreateActionView()
    {
        View view = super.onCreateActionView();
        if (view != null)
        {
            try
            {
                Drawable icon = ... // the drawable you want (you can use mContext to get it from resources)
                Method method = view.getClass().getMethod("setExpandActivityOverflowButtonDrawable", Drawable.class);
                method.invoke(view, icon);
            }
            catch (Exception e)
            {
                Log.e("MyShareActionProvider", "onCreateActionView", e);
            }
        }

        return view;
    }
}

As with any solutions that involve reflection, this may be brittle if the internal implementation of `ShareActionProvider` changes in the future.

Problem

Original source