drawer expandeble menu

app/build.gradle

@@ -44,6 +44,7 @@ dependencies {
     compile 'com.afollestad.material-dialogs:core:0.9.4.5'
     compile 'com.github.AndroidDeveloperLB:DialogShard:3'
     compile 'com.github.HITGIF:TextFieldBoxes:1.3.3'
+    compile 'io.github.luizgrp.sectionedrecyclerviewadapter:sectionedrecyclerviewadapter:1.1.3'
     testCompile 'junit:junit:4.12'
     annotationProcessor 'com.jakewharton:butterknife-compiler:8.5.1'
 }

app/src/main/java/ch/pizzalink/android/activity/MainActivity.java

@@ -11,12 +11,15 @@ import android.support.v7.widget.RecyclerView;
 import android.util.Log;
 import android.view.MenuItem;
 import android.view.View;
+import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import com.ittianyu.bottomnavigationviewex.BottomNavigationViewEx;
 
 import java.util.ArrayList;
+import java.util.List;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
@@ -42,6 +45,9 @@ import ch.pizzalink.android.helper.SharedPrefsHelper;
 import ch.pizzalink.android.interfaces.RecyclerItemClickListener;
 import ch.pizzalink.android.model.CategoryModel;
 import ch.pizzalink.android.view.PizzalinkToolbar;
+import io.github.luizgrp.sectionedrecyclerviewadapter.SectionParameters;
+import io.github.luizgrp.sectionedrecyclerviewadapter.SectionedRecyclerViewAdapter;
+import io.github.luizgrp.sectionedrecyclerviewadapter.StatelessSection;
 
 public class MainActivity extends BaseActivity {
 
@@ -55,6 +61,8 @@ public class MainActivity extends BaseActivity {
     private ArrayList<CategoryModel> categoryList = new ArrayList<>();
     private NavigationMenuRecyclerAdapter navigationMenuRecyclerAdapter;
 
+    private SectionedRecyclerViewAdapter sectionAdapter = new SectionedRecyclerViewAdapter();
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -144,24 +152,6 @@ public class MainActivity extends BaseActivity {
         });
     }
 
-    private void initNavigationMenuRecyclerView(){
-        categoryList = SharedPrefsHelper.readCategoryList();
-        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
-        layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
-        navigationMenuRecyclerView.setLayoutManager(layoutManager);
-        navigationMenuRecyclerAdapter = new NavigationMenuRecyclerAdapter(categoryList, new RecyclerItemClickListener() {
-            @Override
-            public void onItemClick(View view, int position) {
-                fragmentManager.beginTransaction().replace(R.id.fragmentContainer,
-                        MenuFragment.newInstance(categoryList.get(position))).commit();
-                currentFragmentName = OwnPizzaFragment.FRAGMENT_NAME;
-                drawerLayout.closeDrawers();
-            }
-        });
-        navigationMenuRecyclerView.setAdapter(navigationMenuRecyclerAdapter);
-    }
-
-
     private void openNavigationDrawer(){
         drawerLayout.openDrawer(GravityCompat.START);
     }
@@ -273,6 +263,104 @@ public class MainActivity extends BaseActivity {
             drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
         else
             drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
-
     }
+
+    private void initNavigationMenuRecyclerView(){
+        categoryList = SharedPrefsHelper.readCategoryList();
+
+        for(int i = 0; i < categoryList.size(); i++){
+            List<CategoryModel> subcategoryList = categoryList.get(i).getSubCategoryList();
+            sectionAdapter.addSection(new CategorySection(i, categoryList.get(i).getName(), subcategoryList));
+        }
+
+        navigationMenuRecyclerView.setLayoutManager(new LinearLayoutManager(this));
+        navigationMenuRecyclerView.setAdapter(sectionAdapter);
+    }
+
+    private class CategorySection extends StatelessSection {
+
+        String title;
+        List<CategoryModel> list;
+        int pstn;
+
+        CategorySection(int pstn, String title, List<CategoryModel> list) {
+            super(new SectionParameters.Builder(R.layout.row_subcategory)
+                    .headerResourceId(R.layout.row_category)
+                    .build());
+
+            this.title = title;
+            this.list = list;
+            this.pstn = pstn;
+        }
+
+        @Override
+        public int getContentItemsTotal() {
+            return list.size();
+        }
+
+        @Override
+        public RecyclerView.ViewHolder getItemViewHolder(View view) {
+            return new ItemViewHolder(view);
+        }
+
+        @Override
+        public void onBindItemViewHolder(RecyclerView.ViewHolder holder, final int position) {
+            final ItemViewHolder itemHolder = (ItemViewHolder) holder;
+            String name = list.get(position).getName();
+            itemHolder.subcategoryNameItem.setText("-  " + name);
+            itemHolder.rootView.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    fragmentManager.beginTransaction().replace(R.id.fragmentContainer,
+                            MenuFragment.newInstance(list.get(position))).commit();
+                    currentFragmentName = OwnPizzaFragment.FRAGMENT_NAME;
+                    drawerLayout.closeDrawers();
+                }
+            });
+        }
+
+        @Override
+        public RecyclerView.ViewHolder getHeaderViewHolder(View view) {
+            return new HeaderViewHolder(view);
+        }
+
+        @Override
+        public void onBindHeaderViewHolder(RecyclerView.ViewHolder holder) {
+            final HeaderViewHolder headerHolder = (HeaderViewHolder) holder;
+            headerHolder.categoryNameItem.setText(title);
+            headerHolder.rootView.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View view) {
+                    fragmentManager.beginTransaction().replace(R.id.fragmentContainer,
+                            MenuFragment.newInstance(categoryList.get(pstn))).commit();
+                    currentFragmentName = OwnPizzaFragment.FRAGMENT_NAME;
+                    drawerLayout.closeDrawers();
+                }
+            });
+        }
+    }
+
+    private class HeaderViewHolder extends RecyclerView.ViewHolder {
+        private final View rootView;
+        private final TextView categoryNameItem;
+
+        HeaderViewHolder(View view) {
+            super(view);
+            rootView = view;
+            categoryNameItem = (TextView) view.findViewById(R.id.categoryNameItem);
+        }
+    }
+
+    private class ItemViewHolder extends RecyclerView.ViewHolder {
+
+        private final View rootView;
+        private final TextView subcategoryNameItem;
+
+        ItemViewHolder(View view) {
+            super(view);
+            rootView = view;
+            subcategoryNameItem = (TextView) view.findViewById(R.id.subcategoryNameItem);
+        }
+    }
+
 }

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

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/subcategoryNameItem"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:textColor="@color/white"
+    android:padding="20dp"
+    android:layout_marginLeft="20dp"
+    android:layout_marginStart="20dp"
+    android:textSize="16sp"
+    android:textStyle="bold" />