myLocationViewSettings.setBackgroundTintColor cannot be #00000000

[ghengeveld]

Platform: Android 5.0
Mapbox SDK version: 4.2.0.beta.3

Steps to trigger behavior

1. Use MyLocationViewSettings.setForegroundDrawable to show a custom drawable at the user's location
2. Use MyLocationViewSettings.setBackgroundTintColor with #00000000 (fully transparent black)

In OnMapReadyCallback.onMapReady:

Drawable walkingUserMarker = ContextCompat.getDrawable(context, R.drawable.marker_user_walk);
MyLocationViewSettings myLocationViewSettings = mapboxMap.getMyLocationViewSettings();
myLocationViewSettings.setAccuracyAlpha(0);
myLocationViewSettings.setForegroundDrawable(walkingUserMarker, null);
myLocationViewSettings.setBackgroundTintColor(ContextCompat.getColor(context, R.color.transparent));

In colors.xml:

<color name="transparent">#00000000</color>

Setting the color to #00ffffff avoids this issue and yields the expected result.

Expected behavior

Only the marker drawable should be rendered at the user's location, nothing else.

Actual behavior

The drawable appears with a light gray dot below it. This appears to be the default background tint.

It would be nice to be able to use setBackgroundTintColor(null) to disable the background altogether.

[cammace]

This is due to use checking if it is transparent or not. We should rethink this check or expose a setVisibility method for the foreground/background images. @tobrun what do you think?

[tobrun]

Makes sense @cammace, feel free to run with this