- Add functionality for on screen buttons.

- Improve layout.

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

@@ -1,13 +1,13 @@
 package me.zobrist.tichucounter
 
 import android.os.Bundle
-import androidx.appcompat.app.AppCompatActivity
 import android.view.Menu
 import android.view.MenuItem
+import androidx.appcompat.app.AppCompatActivity
 import androidx.core.widget.doOnTextChanged
 import kotlinx.android.synthetic.main.content_main.*
+import android.text.InputType
 import kotlinx.coroutines.sync.Mutex
-import kotlin.Exception
 
 class MainActivity : AppCompatActivity() {
 
@@ -26,22 +26,34 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
         setSupportActionBar(findViewById(R.id.toolbar))
+        inputTeamA.setRawInputType(InputType.TYPE_NULL)
+        inputTeamB.setRawInputType(InputType.TYPE_NULL)
 
 
 
         inputTeamA.doOnTextChanged { text, start, count, after ->
             if (inputTeamA.isFocused) {
-                inputTeamB.setText(updateNumber(text, tempCounterTeamA + tempCounterTeamB))
+                if (inputTeamA.text.isNotEmpty()){
+                    inputTeamB.setText(updateNumber(text, tempCounterTeamA + tempCounterTeamB))
+                }else{
+                    inputTeamA.text.clear()
+                    inputTeamB.text.clear()
+                }
             }
         }
 
         inputTeamB.doOnTextChanged { text, start, count, after ->
             if (inputTeamB.isFocused) {
-                inputTeamA.setText(updateNumber(text, tempCounterTeamB + tempCounterTeamA))
+                if (inputTeamB.text.isNotEmpty()){
+                    inputTeamA.setText(updateNumber(text, tempCounterTeamB + tempCounterTeamA))
+                }else{
+                    inputTeamA.text.clear()
+                    inputTeamB.text.clear()
+                }
             }
         }
 
-        add100.setOnClickListener {
+        buttonAdd100.setOnClickListener {
             if (inputTeamA.isFocused) {
                 tempCounterTeamA += 100
                 val temp = try {
@@ -63,7 +75,7 @@ class MainActivity : AppCompatActivity() {
             }
         }
 
-        sub100.setOnClickListener {
+        buttonSub100.setOnClickListener {
             if (inputTeamA.isFocused) {
                 tempCounterTeamA -= 100
                 val temp = try {
@@ -86,6 +98,61 @@ class MainActivity : AppCompatActivity() {
             }
         }
 
+        button0.setOnClickListener {
+            appedtoFocusedInput('0')
+        }
+
+        button1.setOnClickListener {
+            appedtoFocusedInput('1')
+        }
+
+        button2.setOnClickListener {
+            appedtoFocusedInput('2')
+        }
+
+        button3.setOnClickListener {
+            appedtoFocusedInput('3')
+        }
+
+        button4.setOnClickListener {
+            appedtoFocusedInput('4')
+        }
+
+        button5.setOnClickListener {
+            appedtoFocusedInput('5')
+        }
+
+        button6.setOnClickListener {
+            appedtoFocusedInput('6')
+        }
+
+        button7.setOnClickListener {
+            appedtoFocusedInput('7')
+        }
+
+        button8.setOnClickListener {
+            appedtoFocusedInput('8')
+        }
+
+        button9.setOnClickListener {
+            appedtoFocusedInput('9')
+        }
+
+        buttonBack.setOnClickListener{
+            if(inputTeamA.isFocused ){
+                if(inputTeamA.text.isNotEmpty()){
+                    var string = inputTeamA.text.toString()
+                    inputTeamA.setText(string.substring(0, string.length -1))
+                }
+
+            }else if(inputTeamB.isFocused) {
+                if(inputTeamB.text.isNotEmpty()) {
+                    var string = inputTeamB.text.toString()
+                    inputTeamB.setText(string.substring(0, string.length - 1))
+                }
+            }
+        }
+
         add.setOnClickListener {
 
             if (inputTeamA.text.isNotEmpty() && inputTeamB.text.isNotEmpty()) {
@@ -101,8 +168,8 @@ class MainActivity : AppCompatActivity() {
                 scoreA.text = counterTeamA.toString()
                 scoreB.text = counterTeamB.toString()
 
-                inputTeamA.setText("")
-                inputTeamB.setText("")
+                inputTeamA.text.clear()
+                inputTeamB.text.clear()
             }
         }
     }
@@ -126,12 +193,21 @@ class MainActivity : AppCompatActivity() {
     private fun clearAll() {
         historyA.text = ""
         historyB.text = ""
-        inputTeamA.setText("")
-        inputTeamB.setText("")
+        inputTeamA.text.clear()
+        inputTeamB.text.clear()
         scoreA.text = ""
         scoreB.text = ""
     }
 
+    private fun appedtoFocusedInput(toAppend: Char){
+        if(inputTeamA.isFocused){
+            inputTeamA.text.append(toAppend)
+        }else if(inputTeamB.isFocused)
+        {
+            inputTeamB.text.append(toAppend)
+        }
+    }
+
 
     private fun updateNumber(inputText: CharSequence?, offset: Int): String {
         var toSet: Int = 0