Created Kotlin etension functions to add a enabled/disabled functionality to FloatingActionButtons. This is used in the SendTransactionFragment to show the Send button as disabled when the information to send a transaction is not all correct.

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/SendTransactionFragment.kt

@@ -29,6 +29,8 @@ import cy.agorise.bitsybitshareswallet.database.joins.BalanceDetail
 import cy.agorise.bitsybitshareswallet.repositories.AuthorityRepository
 import cy.agorise.bitsybitshareswallet.utils.Constants
 import cy.agorise.bitsybitshareswallet.utils.CryptoUtils
+import cy.agorise.bitsybitshareswallet.utils.disable
+import cy.agorise.bitsybitshareswallet.utils.enable
 import cy.agorise.bitsybitshareswallet.viewmodels.BalanceDetailViewModel
 import cy.agorise.graphenej.*
 import cy.agorise.graphenej.api.ConnectionStatusUpdate
@@ -160,7 +162,7 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
         }
 
         fabSendTransaction.setOnClickListener { startSendTransferOperation() }
-        fabSendTransaction.hide()
+        fabSendTransaction.disable(R.color.lightGray)
 
         authorityRepository = AuthorityRepository(context!!)
 
@@ -391,9 +393,9 @@ class SendTransactionFragment : Fragment(), ZXingScannerView.ResultHandler, Serv
 
     private fun enableDisableSendFAB() {
         if (isToAccountCorrect && isAmountCorrect)
-            fabSendTransaction.show()
+            fabSendTransaction.enable(R.color.colorSend)
         else
-            fabSendTransaction.hide()
+            fabSendTransaction.disable(R.color.lightGray)
     }
 
     private fun startSendTransferOperation() {

app/src/main/java/cy/agorise/bitsybitshareswallet/utils/Extensions.kt

@@ -0,0 +1,15 @@
+package cy.agorise.bitsybitshareswallet.utils
+
+import android.content.res.ColorStateList
+import androidx.core.content.ContextCompat
+import com.google.android.material.floatingactionbutton.FloatingActionButton
+
+fun FloatingActionButton.enable(colorResource: Int) {
+    this.isEnabled = true
+    this.backgroundTintList = ColorStateList.valueOf(ContextCompat.getColor(this.context, colorResource))
+}
+
+fun FloatingActionButton.disable(colorResource: Int) {
+    this.isEnabled = false
+    this.backgroundTintList = ColorStateList.valueOf(ContextCompat.getColor(this.context, colorResource))
+}

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

@@ -186,7 +186,6 @@
             app:fabCustomSize="90dp"
             app:maxImageSize="70dp"
             app:srcCompat="@drawable/ic_arrow_forward"
-            android:backgroundTint="@color/colorSend"
             app:layout_constraintEnd_toEndOf="@id/vSend"
             app:layout_constraintTop_toTopOf="@+id/vSend" />
 

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

@@ -105,7 +105,7 @@
             android:layout_width="0dp"
             android:layout_height="1dp"
             android:layout_marginTop="12dp"
-            android:background="@color/lightGray"
+            android:background="@color/superLightGray"
             app:layout_constraintTop_toBottomOf="@id/tvFrom"
             app:layout_constraintStart_toEndOf="@id/firstVerticalGuideline"
             app:layout_constraintEnd_toStartOf="@id/fourthVerticalGuideline" />
@@ -133,7 +133,7 @@
                 android:layout_width="match_parent"
                 android:layout_height="1dp"
                 android:layout_marginTop="12dp"
-                android:background="@color/lightGray"/>
+                android:background="@color/superLightGray"/>
 
         </LinearLayout>
 

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

@@ -10,7 +10,8 @@
     <color name="black">#000</color>
     <color name="gray">#888</color>
     <color name="ppGreen">#139657</color>
-    <color name="lightGray">#e0e0e0</color>
+    <color name="lightGray">#aaa</color>
+    <color name="superLightGray">#e0e0e0</color>
     <color name="darkGray">#616161</color>
     <color name="colorReceive">#669900</color>
     <color name="colorSend">#DC473A</color>