Got buttons working to switch tabs.

android/assets/skin/uiskin.json

@@ -5,7 +5,7 @@ com.badlogic.gdx.graphics.Color: {
 	white: { a: 1, b: 1, g: 1, r: 1 },
 	red: { a: 1, b: 0, g: 0, r: 1 },
 	black: { a: 1, b: 0, g: 0, r: 0 },
-    blue: {a: 1, b: 1, g: 0, r: 0 }
+    blue: {a: 1, b: 0.9, g: 0.4, r: 0 }
 },
 com.badlogic.gdx.scenes.scene2d.ui.Skin$TintedDrawable: {
 	dialogDim: { name: white, color: { r: 0, g: 0, b: 0, a: 0.45 } },

android/project.properties

@@ -11,4 +11,4 @@
 #proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
 
 # Project target.
-target=android-19
+target=android-21