Limit the memo length to 100 in the Send screen.

- For some reason if we use a memo longer than 107 chars we get an error, to avoid that error we are limiting the memo length to 100 chars using TextInputLayout's counter options to show the current char count and the max char count. If the current char count exceeds the max the TextInputLayout turns to red and the Send button is disabled.

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

@@ -82,6 +82,7 @@ class SendTransactionFragment : ConnectedFragment(), ZXingScannerView.ResultHand
     private var isCameraPreviewVisible = false
     private var isToAccountCorrect = false
     private var isAmountCorrect = false
+    private var isMemoCorrect = true
 
     private var mBalancesDetails = ArrayList<BalanceDetail>()
 
@@ -213,6 +214,19 @@ class SendTransactionFragment : ConnectedFragment(), ZXingScannerView.ResultHand
                 .subscribe { validateAmount() }
         )
 
+        // Use RxJava Debounce to update the Memo error, to make sure it has the correct length
+        mDisposables.add(
+            tietMemo.textChanges()
+                .skipInitialValue()
+                .debounce(500, TimeUnit.MILLISECONDS)
+                .observeOn(AndroidSchedulers.mainThread())
+                .map { it.toString().trim() }
+                .subscribe {
+                    isMemoCorrect = it.length <= tilMemo.counterMaxLength
+                    enableDisableSendFAB()
+                }
+        )
+
         // Populates the To field if a Deep Link was used
         if (args.to != " " && args.asset != " " && args.amount > 0 && args.memo != " ") {
             val items = arrayOf(LineItem("transfer", 1, args.amount.toDouble()))
@@ -488,7 +502,7 @@ class SendTransactionFragment : ConnectedFragment(), ZXingScannerView.ResultHand
     }
 
     private fun enableDisableSendFAB() {
-        if (isToAccountCorrect && isAmountCorrect) {
+        if (isToAccountCorrect && isAmountCorrect && isMemoCorrect) {
             fabSendTransaction.enable(R.color.colorSend)
             vSend.setBackgroundResource(R.drawable.send_fab_background)
         } else {

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

@@ -133,6 +133,8 @@
             android:layout_marginStart="@dimen/activity_horizontal_margin"
             android:layout_marginEnd="@dimen/activity_horizontal_margin"
             android:hint="@string/text__memo"
+            app:counterEnabled="true"
+            app:counterMaxLength="100"
             app:layout_constraintTop_toBottomOf="@id/tilAmount"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintEnd_toEndOf="parent">
@@ -150,7 +152,6 @@
             android:id="@+id/tvScan"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_marginTop="@dimen/spacing_same_topic"
             android:layout_marginStart="@dimen/activity_horizontal_margin"
             android:text="@string/text__scan_qr"
             android:textAppearance="@style/TextAppearance.Bitsy.Body1"