fix resource loading

Author: lazaromenezes

README.md

@@ -12,17 +12,32 @@ XML widget to create the Material Design Floating Action Button for Android Nati
 
 ## Usage
 
+### For using with a custom resource
+
 #### XML
 ```XML
 <Page xmlns="http://schemas.nativescript.org/tns.xsd"
       xmlns:FAB="nativescript-floatingactionbutton">
     <FAB:fab tap="fabTap"
-             icon="ic_add_white"
+             icon="res://ic_add_white"
              backColor="#ff4081"
              rippleColor="#f1f1f1"
              class="fab-button" />
 </Page>
 ```
+### For using with an android built-in resource
+
+#### XML
+```XML
+<Page xmlns="http://schemas.nativescript.org/tns.xsd"
+      xmlns:FAB="nativescript-floatingactionbutton">
+    <FAB:fab tap="fabTap"
+             icon="ic_menu_camera"
+             backColor="#ff4081"
+             rippleColor="#f1f1f1"
+             class="fab-button" />
+</Page>
+```
 
 #### CSS
 I recommend the following CSS styles.
@@ -59,4 +74,4 @@ Attribute to specify which icon to use for the FAB button, supports the same ima
 
 ### Contributors
 
-- Lázaro Danillo [lazaromenezes](https://github.com/lazaromenezes)
+- L�zaro Danillo [lazaromenezes](https://github.com/lazaromenezes)

demo/app/main-page.xml

@@ -6,13 +6,13 @@
         <StackLayout>
             <grid-layout rows="auto, *" id="main-content">
                 <label text="Native FAB down there..." class="title" row="0" />
-                
+
                 <FAB:fab tap="fabTap"
                          row="1"
-                         icon="ic_add_white"
+                         icon="res://ic_add_white"
                          backColor="#ff4081"
                          rippleColor="#f1f1f1"
                          class="fab-button" />
             </grid-layout>
         </StackLayout>
-</Page>
+</Page>

fab.android.js

@@ -32,15 +32,15 @@
         if(this.icon){
           iconDrawable = null;
 
-          if(ImageSource.isFileOrResourcePath(this.icon))
+          if(ImageSource.isFileOrResourcePath(this.icon)){
             iconDrawable = ImageSource.fromFileOrResource(this.icon);
+            this._android.setImageBitmap(iconDrawable.android);
+          }
           else{
             var drawableId = android.content.res.Resources.getSystem().getIdentifier(this.icon, "drawable", "android");
             iconDrawable = android.content.res.Resources.getSystem().getDrawable(drawableId);
-          }
-
-          if(iconDrawable != null)
             this._android.setImageDrawable(iconDrawable);
+          }
         }
 
          var that = new WeakRef(this);