Hiding test button from release build.

app/build.gradle

@@ -62,13 +62,12 @@ android {
         versionName "2.2"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        resValue "bool", "debug_visible", "false"
     }
-
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
-            resValue "string", "debug_visibility", "gone"
             manifestPlaceholders = [
                     appIcon: "@drawable/icon",
                     appIconRound: "@drawable/icon",
@@ -77,7 +76,7 @@ android {
         }
         debug {
             applicationIdSuffix ".debug"
-            resValue "string", "debug_visibility", "visible"
+            resValue "bool", "debug_visible", "true"
             manifestPlaceholders = [
                     appIcon: "@drawable/icon_debug",
                     appIconRound: "@drawable/icon_debug",

app/src/main/java/org/vostan/banvor/PuzzleBoardFragment.java

@@ -35,6 +35,7 @@ public class PuzzleBoardFragment extends Fragment
 	{
 		gameState = theApp().state();
 		binding = FragmentPuzzleBoardBinding.inflate(inflater, container, false);
+		binding.btnTest.setVisibility(getResources().getBoolean(R.bool.debug_visible) ? View.VISIBLE :  View.GONE);
 		return binding.getRoot();
 	}
 

app/src/main/res/layout/fragment_puzzle_board.xml

@@ -62,7 +62,6 @@
 				android:layout_weight="0"
 				android:background="@color/transparent"
 				android:scaleType="fitCenter"
-				android:visibility="visible"
 				android:text="test" />