Force amount validation in SendTransactionFragment when an asset is selected in Assets spinner. The amount validation was done only after the user changed the amount but it has to also be validated when the user selects a different Asset, because it is probable to have less of that asset than what is already typed in the amount field.

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

@@ -191,9 +191,8 @@ class SendTransactionFragment : ConnectedFragment(), ZXingScannerView.ResultHand
             tietAmount.textChanges()
                 .skipInitialValue()
                 .debounce(500, TimeUnit.MILLISECONDS)
-                .map { it.toString().trim() }
                 .observeOn(AndroidSchedulers.mainThread())
-                .subscribe { validateAmount(it!!) }
+                .subscribe { validateAmount() }
         )
     }
 
@@ -210,6 +209,8 @@ class SendTransactionFragment : ConnectedFragment(), ZXingScannerView.ResultHand
 
             tvAvailableAssetAmount.text =
                     String.format("%." + Math.min(balance.precision, 8) + "f %s", amount, balance.symbol)
+
+            validateAmount()
         }
     }
 
@@ -381,7 +382,9 @@ class SendTransactionFragment : ConnectedFragment(), ZXingScannerView.ResultHand
         }
     }
 
-    private fun validateAmount(txtAmount: String) {
+    private fun validateAmount() {
+        val txtAmount = tietAmount.text.toString()
+
         if (mBalancesDetailsAdapter?.isEmpty != false) return
         val balance = mBalancesDetailsAdapter?.getItem(spAsset.selectedItemPosition) ?: return
         val currentAmount = balance.amount.toDouble() / Math.pow(10.0, balance.precision.toDouble())