Give focus to input A if none is selected.

app/src/main/java/me/zobrist/tichucounter/MainActivity.kt

@@ -145,48 +145,59 @@ class MainActivity : AppCompatActivity() {
         }
 
         button0.setOnClickListener {
+            giveFocusToAIfNone()
             appendToFocusedInput('0')
         }
 
         button1.setOnClickListener {
+            giveFocusToAIfNone()
             appendToFocusedInput('1')
         }
 
         button2.setOnClickListener {
+            giveFocusToAIfNone()
             appendToFocusedInput('2')
         }
 
         button3.setOnClickListener {
+            giveFocusToAIfNone()
             appendToFocusedInput('3')
         }
 
         button4.setOnClickListener {
+            giveFocusToAIfNone()
             appendToFocusedInput('4')
         }
 
         button5.setOnClickListener {
+            giveFocusToAIfNone()
             appendToFocusedInput('5')
         }
 
         button6.setOnClickListener {
+            giveFocusToAIfNone()
             appendToFocusedInput('6')
         }
 
         button7.setOnClickListener {
+            giveFocusToAIfNone()
             appendToFocusedInput('7')
         }
 
         button8.setOnClickListener {
+            giveFocusToAIfNone()
             appendToFocusedInput('8')
         }
 
         button9.setOnClickListener {
+            giveFocusToAIfNone()
             appendToFocusedInput('9')
         }
 
         buttonInv.setOnClickListener {
             val tempInt: Int
 
+            giveFocusToAIfNone()
 
             if(inputTeamA.isFocused ){
                 if (inputTeamA.text.isNotEmpty()){
@@ -210,6 +221,8 @@ class MainActivity : AppCompatActivity() {
         }
 
         buttonBack.setOnClickListener {
+            giveFocusToAIfNone()
+
             if (inputTeamA.isFocused) {
                 if (inputTeamA.text.isNotEmpty()) {
                     val string = inputTeamA.text.toString()
@@ -225,6 +238,7 @@ class MainActivity : AppCompatActivity() {
         }
 
         submit.setOnClickListener {
+            giveFocusToAIfNone()
 
             if (inputTeamA.text.isNotEmpty() && inputTeamB.text.isNotEmpty()) {
 
@@ -272,6 +286,12 @@ class MainActivity : AppCompatActivity() {
         }
     }
 
+    private fun giveFocusToAIfNone() {
+        if (!inputTeamA.isFocused && !inputTeamB.isFocused) {
+            inputTeamA.requestFocus()
+        }
+    }
+
     private fun undoLastRound() {
 
         history.revertLastRound()