Made getting subcategories.

app/src/main/java/ru/volgorobot/vrcatalog/MainActivity.java

@@ -1,7 +1,9 @@
 package ru.volgorobot.vrcatalog;
 
+import android.content.AsyncQueryHandler;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
 import android.support.design.widget.NavigationView;
@@ -17,6 +19,7 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Toast;
 
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -29,6 +32,7 @@ import ru.volgorobot.vrcatalog.additional.NodeViewFactory;
 import ru.volgorobot.vrcatalog.api.Controller;
 import ru.volgorobot.vrcatalog.api.VRApi;
 import ru.volgorobot.vrcatalog.model.FirstLevelModel;
+import ru.volgorobot.vrcatalog.model.SecondLevelModel;
 
 public class MainActivity extends AppCompatActivity
         implements NavigationView.OnNavigationItemSelectedListener, SwipeRefreshLayout.OnRefreshListener {
@@ -37,7 +41,9 @@ public class MainActivity extends AppCompatActivity
     private VRApi vrApi;
     private List<FirstLevelModel> firstLevelObjects = new ArrayList<>();
     private List<TreeNode> firstLevelNodes = new ArrayList<>();
+    private List<SecondLevelModel> secondLevelObjects = new ArrayList<>();
     private TreeNode rootNode = TreeNode.root();
+    private SwipeRefreshLayout mSwipeRefreshLayout;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -56,13 +62,11 @@ public class MainActivity extends AppCompatActivity
         NavigationView navigationView = findViewById(R.id.nav_view);
         navigationView.setNavigationItemSelectedListener(this);
 
-        SwipeRefreshLayout mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeRefreshLayout);
+        mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeRefreshLayout);
         mSwipeRefreshLayout.setOnRefreshListener(MainActivity.this);
         mSwipeRefreshLayout.setColorSchemeResources(R.color.colorPrimary);
 
-
+        try {
-
-        try{
             getTreeData(false);
         } catch (IllegalStateException e) {
             //
@@ -114,14 +118,29 @@ public class MainActivity extends AppCompatActivity
         for (int i = 0; i < firstLevelObjects.size(); i++) {
             firstLevelNodes.add(new TreeNode(firstLevelObjects.get(i).getName()));
             firstLevelNodes.get(i).setLevel(0);
+            firstLevelNodes.get(i).setChildren(getSecondLevelNodesByParentID(firstLevelObjects.get(i).getID()));
         }
 
         rootNode.setChildren(firstLevelNodes);
     }
 
+    private ArrayList<TreeNode> getSecondLevelNodesByParentID(int parentTypeID) {
+        ArrayList<SecondLevelModel> objects = new ArrayList<>();
+        for (int i = 0; i < secondLevelObjects.size(); i++) {
+            if(secondLevelObjects.get(i).getDetailTypeId() == parentTypeID) {
+                objects.add(secondLevelObjects.get(i));
+            }
+        }
+        ArrayList<TreeNode> nodes = new ArrayList<>();
+        for (int i = 0; i < objects.size(); i++) {
+            nodes.add(new TreeNode(objects.get(i).getName()));
+            nodes.get(i).setLevel(1);
+        }
+        return nodes;
+    }
+
     @Override
     public void onRefresh() {
-        final SwipeRefreshLayout mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeRefreshLayout);
         mSwipeRefreshLayout.setRefreshing(true);
 
         try {
@@ -131,9 +150,7 @@ public class MainActivity extends AppCompatActivity
         }
     }
 
-    private void getTreeData(boolean clean) throws IllegalStateException {
+    private void getTreeData(final boolean clean) throws IllegalStateException {
-
-        final SwipeRefreshLayout mSwipeRefreshLayout = findViewById(R.id.swipeRefreshLayout);
         mSwipeRefreshLayout.setRefreshing(true);
         if(clean) {
             for (int i = 0; i < firstLevelNodes.size(); i++) {
@@ -142,6 +159,9 @@ public class MainActivity extends AppCompatActivity
             for (int i = 0; i < firstLevelObjects.size(); i++) {
                 firstLevelObjects.remove(i);
             }
+            for (int i = 0; i < secondLevelObjects.size(); i++) {
+                secondLevelObjects.remove(i);
+            }
         }
 
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
@@ -152,39 +172,56 @@ public class MainActivity extends AppCompatActivity
         } catch(IllegalStateException e) {
             throw new IllegalStateException();
         }
-
+        class GetTreeData extends AsyncTask<Void, Void, Void> {
-        vrApi.getFirstLevel().enqueue(new Callback<List<FirstLevelModel>>() {
             @Override
-            public void onResponse(Call<List<FirstLevelModel>> call, Response<List<FirstLevelModel>> response) {
+            protected Void doInBackground(Void... voids) {
-                if(response != null) {
                 try {
-                        firstLevelObjects.addAll(response.body());
+                    Response<List<FirstLevelModel>> firstLevelResponse = vrApi.getFirstLevel().execute();
-                        mSwipeRefreshLayout.post(new Runnable() {
+                    if(firstLevelResponse.isSuccessful()) {
+                        firstLevelObjects.addAll(firstLevelResponse.body());
+                        for (int i = 0; i < firstLevelObjects.size(); i++) {
+                            Response<List<SecondLevelModel>> secondLevelResponse = vrApi.getSecondLevel(firstLevelObjects.get(i).getID()).execute();
+                            if(secondLevelResponse.isSuccessful()) {
+                                secondLevelObjects.addAll(secondLevelResponse.body());
+                            } else {
+                                onFailureAnswer(1);
+                            }
+                        }
+                    }
+                } catch (Exception e) {
+                    onFailureAnswer(0);
+                }
+                return null;
+            }
+
             @Override
-                            public void run() {
+            protected void onPostExecute(Void aVoid) {
-                                mSwipeRefreshLayout.setRefreshing(false);
+                super.onPostExecute(aVoid);
-                            }
-                        });
-                    } catch(Exception e) {
-                        Toast.makeText(MainActivity.this, "Ответ от сервера неверен! Перепроверьте данные подключения!", Toast.LENGTH_LONG).show();
-                        Log.e("VRCatalog", "Answer of server is wrong! Re-check your connection credentials! Error: " +  response.message());
-                        mSwipeRefreshLayout.setRefreshing(false);
-                    }
                 fillRootNode();
                 treeView.refreshTreeView();
-                } else {
-                    Log.e("VRCatalog", "Что-то пошло не так...");
                 mSwipeRefreshLayout.setRefreshing(false);
             }
-
+        }
+        new GetTreeData().execute();
     }
 
-            @Override
+    private void onFailureAnswer(int errorCode) {
-            public void onFailure(Call<List<FirstLevelModel>> call, Throwable t) {
+        switch (errorCode) {
+            case 0: {
                 Toast.makeText(MainActivity.this, "Ошибка сети. Проверьте подключение к сети или данные подключения к API!", Toast.LENGTH_LONG).show();
-                Log.e("VRCatalog", "Network Error! Re-check your connection credentials or network settings! Technical information: " + t.toString());
+                Log.e("VRCatalog", "Network Error! Re-check your connection credentials or network settings!");
                 mSwipeRefreshLayout.setRefreshing(false);
+                break;
             }
-        });
+            case 1: {
+                Toast.makeText(MainActivity.this, "Ответ от сервера неверен! Перепроверьте данные подключения!", Toast.LENGTH_LONG).show();
+                Log.e("VRCatalog", "Answer of server is wrong! Re-check your connection credentials!");
+                mSwipeRefreshLayout.setRefreshing(false);
+                break;
             }
+        }
+    }
+
 }
+
+

app/src/main/java/ru/volgorobot/vrcatalog/api/VRApi.java

@@ -4,10 +4,15 @@ import java.util.List;
 
 import retrofit2.Call;
 import retrofit2.http.GET;
+import retrofit2.http.Query;
 import ru.volgorobot.vrcatalog.model.FirstLevelModel;
+import ru.volgorobot.vrcatalog.model.SecondLevelModel;
 
 public interface VRApi {
 
     @GET("/API/Api.php?action=getFirstLevel")
     Call<List<FirstLevelModel>> getFirstLevel();
+
+    @GET("/API/Api.php?action=getSecondLevel")
+    Call<List<SecondLevelModel>> getSecondLevel(@Query("parentTypeID") int parentTypeID);
 }