app/src/main/java/io/n0x/android/java_mot_testing/MainActivity.java

@@ -1,23 +1,29 @@
 package io.n0x.android.java_mot_testing;
 
+import android.annotation.SuppressLint;
 import android.os.Bundle;
 import android.util.Log;
+import android.view.View;
+import android.widget.TextView;
 
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.databinding.DataBindingUtil;
 
 import io.n0x.android.java_mot_testing.databinding.Ex9DataBindingBinding;
-import io.n0x.android.java_mot_testing.helper.Converter;
 
-public class MainActivity extends AppCompatActivity{
+public class MainActivity extends AppCompatActivity implements View.OnClickListener {
     // For debugging
     private static final String TAG = MainActivity.class.getName();
+    // Local calculator instance
+    private FractionCalculator calc;
+
+    private int test;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        // Local calculator instance
+        // create calculator instance
-        FractionCalculator calc = new FractionCalculator();
+        calc = new FractionCalculator();
 
         // set a value for testing
         calc.setEnumResult(0);
@@ -26,16 +32,37 @@ public class MainActivity extends AppCompatActivity{
         // Bind instance of FractionCalculator to view
         Ex9DataBindingBinding binding = DataBindingUtil.setContentView(this, R.layout.ex9_data_binding);
         binding.setCalc(calc);
-        // set initial value for the arithmetical method
-        calc.setArithMethod(FractionCalculator.ARTIH.ADD);
 
-        /*
+        // Button Listeners
-        // Converter to get null values
+        findViewById(R.id.button_add).setOnClickListener(this);
-        Converter conv = new Converter();
+        findViewById(R.id.button_sub).setOnClickListener(this);
-        binding.setConv(conv);
+        findViewById(R.id.button_mult).setOnClickListener(this);
-        //*/
+        findViewById(R.id.button_div).setOnClickListener(this);
+        findViewById(R.id.button_calc).setOnClickListener(this);
 
         // Log create action
         Log.d(TAG, "MainActivity started");
     }
+
+    @SuppressLint("NonConstantResourceId")
+    @Override
+    public void onClick(View v) {
+        switch(v.getId()){
+            case R.id.button_add:
+                calc.setArithMethod(FractionCalculator.ARTIH.ADD);
+                break;
+            case R.id.button_sub:
+                calc.setArithMethod(FractionCalculator.ARTIH.SUBTRACT);
+                break;
+            case R.id.button_mult:
+                calc.setArithMethod(FractionCalculator.ARTIH.MULTIPLICATE);
+                break;
+            case R.id.button_div:
+                calc.setArithMethod(FractionCalculator.ARTIH.DIVIDE);
+                break;
+            case R.id.button_calc:
+                calc.calculateResult();
+                break;
+        }
+    }
 }

app/src/main/java/io/n0x/android/java_mot_testing/helper/Converter.java

@@ -1,18 +0,0 @@
-package io.n0x.android.java_mot_testing.helper;
-
-import androidx.databinding.InverseMethod;
-
-public class Converter {
-    @InverseMethod("toInt")
-    public static String toString(int val){
-        if(val == 0){
-            return null;
-        }
-        return String.valueOf(val);
-    }
-    public static int toInt(String val){
-        if(val == null || val.isEmpty())
-            return 0;
-        return Integer.parseInt(val);
-    }
-}

app/src/main/res/layout/ex9_data_binding.xml

@@ -7,9 +7,6 @@
         <variable
             name="calc"
             type="io.n0x.android.java_mot_testing.FractionCalculator" />
-        <variable
-            name="conv"
-            type="io.n0x.android.java_mot_testing.helper.Converter" />
     </data>
 
     <androidx.constraintlayout.widget.ConstraintLayout
@@ -17,7 +14,6 @@
         android:layout_height="match_parent">
 
         <Button
-            android:onClick="@{() -> calc.setArithMethod(io.n0x.android.java_mot_testing.FractionCalculator.ARTIH.ADD)}"
             android:id="@+id/button_add"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
@@ -30,7 +26,6 @@
             app:layout_constraintTop_toTopOf="parent" />
 
         <Button
-            android:onClick="@{() -> calc.setArithMethod(io.n0x.android.java_mot_testing.FractionCalculator.ARTIH.SUBTRACT)}"
             android:id="@+id/button_sub"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
@@ -41,7 +36,6 @@
             app:layout_constraintTop_toTopOf="parent" />
 
         <Button
-            android:onClick="@{() -> calc.setArithMethod(io.n0x.android.java_mot_testing.FractionCalculator.ARTIH.MULTIPLICATE)}"
             android:id="@+id/button_mult"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
@@ -52,7 +46,6 @@
             app:layout_constraintTop_toTopOf="parent" />
 
         <Button
-            android:onClick="@{() -> calc.setArithMethod(io.n0x.android.java_mot_testing.FractionCalculator.ARTIH.DIVIDE)}"
             android:id="@+id/button_div"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
@@ -143,7 +136,6 @@
             app:layout_constraintTop_toBottomOf="@+id/enumRight" />
 
         <Button
-            android:onClick="@{() -> calc.calculateResult()}"
             android:id="@+id/button_calc"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"