Use actual dimen resource id instead of target id (#158)

* Make sample use dimen resources

* Use actual dimen resource ID

Author: xiphirx

app/src/main/java/com/getkeepsafe/taptargetviewsample/MainActivity.java

@@ -103,6 +103,7 @@ public void onTargetClick(TapTargetView view) {
         TapTargetView.showFor(this, TapTarget.forView(findViewById(R.id.fab), "Hello, world!", spannedDesc)
                 .cancelable(false)
                 .drawShadow(true)
+                .titleTextDimen(R.dimen.title_text_size)
                 .tintTarget(false), new TapTargetView.Listener() {
             @Override
             public void onTargetClick(TapTargetView view) {

app/src/main/res/values/dimens.xml

@@ -2,4 +2,5 @@
     <!-- Default screen margins, per the Android Design guidelines. -->
     <dimen name="activity_horizontal_margin">16dp</dimen>
     <dimen name="activity_vertical_margin">16dp</dimen>
+    <dimen name="title_text_size">20dp</dimen>
 </resources>

taptargetview/src/main/java/com/getkeepsafe/taptargetview/TapTarget.java

@@ -469,7 +469,7 @@ private Integer colorResOrInt(Context context, @Nullable Integer value, @ColorRe
 
   private int dimenOrSize(Context context, int size, @DimenRes int dimen) {
     if (dimen != -1) {
-      return context.getResources().getDimensionPixelSize(id);
+      return context.getResources().getDimensionPixelSize(dimen);
     }
 
     return UiUtil.sp(context, size);