[android] #4929 - MyLocationView now requires less drawables to configure, reuses the foreground instead.

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapboxMapOptions.java

@@ -462,6 +462,16 @@ public class MapboxMapOptions implements Parcelable {
         return this;
     }
 
+    /**
+     *
+     * @param myLocationForegroundDrawable
+     * @return This
+     */
+    public MapboxMapOptions myLocationForegroundDrawable(Drawable myLocationForegroundDrawable) {
+        this.myLocationForegroundDrawable = myLocationForegroundDrawable;
+        return this;
+    }
+
     /**
      * @param myLocationBackgroundDrawable
      * @return This

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/widgets/MyLocationView.java

@@ -129,9 +129,22 @@ public class MyLocationView extends View {
     }
 
     public final void setForegroundDrawables(Drawable defaultDrawable, Drawable bearingDrawable) {
-        if (defaultDrawable == null || bearingDrawable == null) {
+        if (defaultDrawable == null) {
             return;
         }
+
+        if (bearingDrawable == null) {
+            // if user only provided one resource
+            // use same for bearing mode
+            bearingDrawable = defaultDrawable;
+        }
+
+        if (backgroundDrawable == null) {
+            // if the user didn't provide a background resource we will use the foreground resource instead,
+            // we need to create a new drawable to handle tinting correctly
+            backgroundDrawable = defaultDrawable.getConstantState().newDrawable();
+        }
+
         if (defaultDrawable.getIntrinsicWidth() != bearingDrawable.getIntrinsicWidth() || defaultDrawable.getIntrinsicHeight() != bearingDrawable.getIntrinsicHeight()) {
             throw new RuntimeException("The dimensions from location and bearing drawables should be match");
         }