validations

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

@@ -24,7 +24,7 @@
                 app:layout_constraintBottom_toTopOf="@+id/amountZEC"
                 android:layout_marginTop="16dp" android:textColor="@android:color/black" android:hint="0.00"
                 android:textAlignment="center" android:singleLine="true" android:selectAllOnFocus="true"
-                android:inputType="numberDecimal"/>
+                android:inputType="numberDecimal" android:maxLength="14"/>
         <TextView
                 android:text="0.0 ZEC"
                 android:layout_width="wrap_content"
@@ -83,7 +83,7 @@
                 tools:layout_conversion_absoluteWidth="0dp" app:layout_constraintTop_toBottomOf="@+id/textView7"
                 android:layout_marginTop="16dp"
                 app:layout_constraintStart_toStartOf="parent" android:fontFamily="monospace" android:singleLine="true"
-                android:selectAllOnFocus="true"/>
+                android:selectAllOnFocus="true" android:textIsSelectable="true"/>
         <ImageButton
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content" app:srcCompat="@android:drawable/ic_menu_camera"
@@ -117,7 +117,7 @@
                 app:layout_constraintStart_toStartOf="parent" android:layout_marginEnd="8dp"
                 app:layout_constraintEnd_toEndOf="parent" android:layout_marginBottom="8dp"
                 app:layout_constraintBottom_toBottomOf="parent" android:singleLine="true"
-                android:selectAllOnFocus="true"/>
+                android:selectAllOnFocus="true" android:maxLength="512"/>
         <TextView
                 android:text=" Memo (Optional)"
                 android:layout_width="wrap_content"