add all category

app/src/main/java/com/example/yourcashiertest/activities/MainActivity.java

@@ -91,6 +91,7 @@ public class MainActivity extends AppCompatActivity {
                 switch (item.getItemId()) {
                     case R.id.item_one:
                         // item one clicked
+                        finish();
                         startActivity(new Intent(MainActivity.this, ProductActivity.class));
                         break;
                     case R.id.item_two:
@@ -141,9 +142,11 @@ public class MainActivity extends AppCompatActivity {
         category.addAll(set);
         categoryAdapter.setCategories(category);
         categoryAdapter.setListener(c -> viewModel.filter(c));
+        binding.btnAllCategory.setOnClickListener(view -> viewModel.filter(""));
         adapter.setListener(new ProductAdapter.ProductListener() {
             @Override
             public void onUpdate(Product product) {
+                finish();
                 startActivity(new Intent(MainActivity.this, ProductActivity.class)
                         .putExtra(DATA_PRODUCT, product));
             }

app/src/main/java/com/example/yourcashiertest/activities/ProductActivity.java

@@ -82,6 +82,7 @@ public class ProductActivity extends AppCompatActivity{
             }catch (Exception e){
                 e.printStackTrace();
             }
+            startActivity(new Intent(ProductActivity.this, MainActivity.class));
         });
         binding.setViewModel(viewModel);
     }

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

@@ -148,6 +148,7 @@
                 android:paddingHorizontal="15dp">
 
                 <TextView
+                    android:id="@+id/btnAllCategory"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_centerInParent="true"