Work on the back button

app/src/main/java/com/astatin3/scoutingapp2025/MainActivity.java

@@ -7,6 +7,7 @@ import com.astatin3.scoutingapp2025.utility.fileEditor;
 import com.google.android.material.bottomnavigation.BottomNavigationView;
 
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.fragment.app.Fragment;
 import androidx.navigation.NavController;
 import androidx.navigation.Navigation;
 import androidx.navigation.ui.AppBarConfiguration;
@@ -20,6 +21,7 @@ public class MainActivity extends AppCompatActivity {
 
 
     private ActivityMainBinding binding;
+    private BottomNavigationView navView;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -39,7 +41,7 @@ public class MainActivity extends AppCompatActivity {
         binding = ActivityMainBinding.inflate(getLayoutInflater());
         setContentView(binding.getRoot());
 
-        BottomNavigationView navView = findViewById(R.id.nav_view);
+        navView = findViewById(R.id.nav_view);
         // Passing each menu ID as a set of Ids because each
         // menu should be considered as top level destinations.
         AppBarConfiguration appBarConfiguration = new AppBarConfiguration.Builder(

app/src/main/java/com/astatin3/scoutingapp2025/ui/data/dataFragment.java

@@ -2,6 +2,7 @@ package com.astatin3.scoutingapp2025.ui.data;
 
 
 import android.os.Bundle;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 
 import android.view.View;
@@ -11,6 +12,8 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
 
+import com.astatin3.scoutingapp2025.MainActivity;
+import com.astatin3.scoutingapp2025.R;
 import com.astatin3.scoutingapp2025.SettingsVersionStack.latestSettings;
 import com.astatin3.scoutingapp2025.databinding.FragmentDataBinding;
 import com.astatin3.scoutingapp2025.utility.fileEditor;
@@ -49,4 +52,30 @@ public class dataFragment extends Fragment {
 
         return root;
     }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+
+        if(getView() == null){
+            return;
+        }
+
+        getView().setFocusableInTouchMode(true);
+        getView().requestFocus();
+        getView().setOnKeyListener(new View.OnKeyListener() {
+            @Override
+            public boolean onKey(View v, int keyCode, KeyEvent event) {
+
+                if (event.getAction() == KeyEvent.ACTION_UP && keyCode == KeyEvent.KEYCODE_BACK){
+                    // handle back button's click listener
+
+                    System.out.println("Back");
+
+                    return true;
+                }
+                return false;
+            }
+        });
+    }
 }

app/src/main/java/com/astatin3/scoutingapp2025/ui/scouting/pitScoutingView.java

@@ -67,9 +67,6 @@ public class pitScoutingView extends ConstraintLayout {
         }
 
         System.out.println(ScoutingDataWriter.save(values.length-1, username, filename, types));
-
-//        fileEditor.createFile(filename);
-//        save_fields();
     }
 
     public void set_indicator_color(int color){

app/src/main/java/com/astatin3/scoutingapp2025/ui/scouting/scoutingFragment.java

@@ -1,6 +1,7 @@
 package com.astatin3.scoutingapp2025.ui.scouting;
 
 import android.os.Bundle;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 
 import android.view.View;
@@ -10,12 +11,14 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
 
+import com.astatin3.scoutingapp2025.MainActivity;
 import com.astatin3.scoutingapp2025.SettingsVersionStack.latestSettings;
 import com.astatin3.scoutingapp2025.databinding.FragmentScoutingBinding;
 
 public class scoutingFragment extends Fragment {
 
     private FragmentScoutingBinding binding;
+    private boolean is_main_page = true;
 
     public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
                              @Nullable Bundle savedInstanceState) {
@@ -30,12 +33,14 @@ public class scoutingFragment extends Fragment {
         if(latestSettings.settings.get_evcode().equals("unset")){
             binding.noEventError.setVisibility(View.VISIBLE);
             binding.buttons.setVisibility(View.GONE);
+            is_main_page = false;
         }
 
         binding.matchScoutingButton.setOnClickListener(v -> {
             binding.buttons.setVisibility(View.GONE);
             binding.matchScoutingView.setVisibility(View.VISIBLE);
             binding.matchScoutingView.init(binding);
+            is_main_page = false;
         });
 
         binding.pitScoutingButton.setOnClickListener(v -> {
@@ -43,8 +48,40 @@ public class scoutingFragment extends Fragment {
             binding.buttons.setVisibility(View.GONE);
             //            binding.pitScoutArea.setVisibility(View.VISIBLE);
             binding.pitScoutingView.init(binding);
+            is_main_page = false;
         });
 
         return root;
     }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+
+        if(getView() == null){
+            return;
+        }
+
+        getView().setFocusableInTouchMode(true);
+        getView().requestFocus();
+        getView().setOnKeyListener(new View.OnKeyListener() {
+            @Override
+            public boolean onKey(View v, int keyCode, KeyEvent event) {
+
+                if (event.getAction() == KeyEvent.ACTION_UP
+                        && keyCode == KeyEvent.KEYCODE_BACK
+                        && !is_main_page){
+
+                    binding.buttons.setVisibility(View.VISIBLE);
+                    binding.matchScoutingView.setVisibility(View.GONE);
+                    binding.pitScoutingView.setVisibility(View.GONE);
+                    is_main_page = true;
+
+                    return true;
+                }
+                return false;
+            }
+        });
+    }
+
 }

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

@@ -28,12 +28,10 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_marginBottom="48dp"
-        android:visibility="gone"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
-        tools:visibility="gone">
 
         <Button
             android:id="@+id/matchScoutingButton"
@@ -194,12 +192,14 @@
         android:layout_width="0dp"
         android:layout_height="0dp"
         android:layout_marginBottom="60dp"
+        android:visibility="gone"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintHorizontal_bias="1.0"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintVertical_bias="1.0">
+        app:layout_constraintVertical_bias="1.0"
+        tools:visibility="gone">
 
         <ScrollView
             android:layout_width="match_parent"
@@ -239,12 +239,10 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:background="#60ff0000"
-            android:visibility="gone"
             app:layout_constraintBottom_toBottomOf="@id/back_button"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintTop_toTopOf="parent">
-            tools:visibility="gone">
 
             <Button
                 android:id="@+id/pit_back_button"

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

@@ -11,7 +11,7 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_marginBottom="60dp"
-        android:visibility="visible"
+        android:visibility="gone"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
@@ -233,7 +233,7 @@
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        tools:visibility="visible">
+        tools:visibility="gone">
 
         <LinearLayout
             android:layout_width="match_parent"