Several bug fixes

Author: WilliBoelke

app/src/main/java/de/htwBerlin/ois/viewModels/ViewModelMainActivity.java

@@ -1,6 +1,7 @@
 package de.htwBerlin.ois.viewModels;
 
 import android.content.Intent;
+import android.os.Bundle;
 import android.util.Log;
 import android.widget.Toast;
 
@@ -98,7 +99,7 @@ public void getHttpResponse(String response)
      * @param intent the intent which started the MainActivity
      * @return FragmentHome.class or FragmentOptions.class
      */
-    public Class getCorrectFragment(Intent intent)
+    public Class getCorrectFragment(Intent intent, Bundle savedInstanceState)
     {
 
         if (intent.getStringExtra("Fragment") != null)
@@ -110,9 +111,15 @@ public Class getCorrectFragment(Intent intent)
                 return FragmentOptions.class;
             }
         }
-        return FragmentHome.class;
-
+        else
+        {
+            if (savedInstanceState == null)
+            {
+                return FragmentHome.class;
+            }
+        }
 
+        return null;
     }
 
     public boolean isDarkModeEnabled()

app/src/main/java/de/htwBerlin/ois/views/fragments/FragmentAbout.java

@@ -41,6 +41,14 @@ public class FragmentAbout extends Fragment
     private View view;
 
 
+    //------------Constructor------------
+
+    public FragmentAbout()
+    {
+        // doesn't do anything special
+    }
+
+
     //------------Activity/Fragment Lifecycle------------
 
     @Nullable

app/src/main/java/de/htwBerlin/ois/views/fragments/FragmentDownloadCenterAll.java

@@ -65,13 +65,20 @@ public class FragmentDownloadCenterAll extends FragmentWithServerConnection
 
 
     //------------Static Variables------------
+
     /**
      * The view
      */
     private View view;
 
+
     //------------Constructor------------
 
+    public FragmentDownloadCenterAll()
+    {
+        // doesn't do anything special
+    }
+
     public FragmentDownloadCenterAll(Client client)
     {
         this.client = client;

app/src/main/java/de/htwBerlin/ois/views/fragments/FragmentDownloadCenterCategories.java

@@ -52,6 +52,14 @@ public class FragmentDownloadCenterCategories extends FragmentWithServerConnecti
     private Client client;
 
 
+    //------------Constructors------------
+
+    public FragmentDownloadCenterCategories()
+    {
+        // doesn't do anything special
+    }
+
+
     //------------Activity/Fragment Lifecycle------------
 
 

app/src/main/java/de/htwBerlin/ois/views/fragments/FragmentFAQ.java

@@ -37,6 +37,14 @@ public class FragmentFAQ extends Fragment
     private View view;
 
 
+    //------------Constructors------------
+
+    public FragmentFAQ()
+    {
+        // doesn't do anything special
+    }
+
+
     //------------Activity/Fragment Lifecycle------------
 
     @Nullable

app/src/main/java/de/htwBerlin/ois/views/fragments/FragmentHome.java

@@ -68,6 +68,13 @@ public class FragmentHome extends Fragment
     private RecyclerView localMapsRecyclerView;
 
 
+    //------------Constructors------------
+
+    public FragmentHome()
+    {
+        // doesn't do anything special
+    }
+
     //------------Activity/Fragment Lifecycle------------
 
     @Nullable

app/src/main/java/de/htwBerlin/ois/views/fragments/FragmentNavigation.java

@@ -66,6 +66,14 @@ public class FragmentNavigation extends Fragment
     private ViewModelNavigation viewModel;
 
 
+    //------------Constructors------------
+
+    public FragmentNavigation()
+    {
+        // doesn't do anything special
+    }
+
+
     //------------Activity/Fragment Lifecycle------------
 
     @Override
@@ -93,7 +101,16 @@ public void onDestroy() {
          * Whenever your activity exits, some cleanup operations have to be performed lest your app
          * runs out of memory.
          */
-        mapView.destroyAll();
+        try
+        {
+            //This sometimes throws a NullPointer
+            mapView.destroyAll();
+        }
+        catch(NullPointerException e)
+        {
+            e.printStackTrace();
+        }
+
         AndroidGraphicFactory.clearResourceMemoryCache();
         super.onDestroy();
     }

app/src/main/java/de/htwBerlin/ois/views/fragments/FragmentOptions.java

@@ -50,6 +50,14 @@ public class FragmentOptions extends Fragment
     public static String ID = "Options";
 
 
+    //------------Constructors------------
+
+    public FragmentOptions()
+    {
+        // doesn't do anything special
+    }
+
+
     //------------Instance Variables------------
 
     /**

app/src/main/java/de/htwBerlin/ois/views/fragments/FragmentRequestNewMap.java

@@ -52,6 +52,11 @@ public class FragmentRequestNewMap extends Fragment
 
     //------------Constructors------------
 
+    public FragmentRequestNewMap()
+    {
+        // doesn't do anything special
+    }
+
     public FragmentRequestNewMap(HttpClient httpClient)
     {
         this.httpClient = httpClient;

app/src/main/java/de/htwBerlin/ois/views/fragments/FragmentRequestStatus.java

@@ -38,6 +38,14 @@ public class FragmentRequestStatus extends FragmentWithServerConnection
     private ViewModelRequestStatus viewModel;
 
 
+    //------------Constructors------------
+
+    public FragmentRequestStatus()
+    {
+        // doesn't do anything special
+    }
+
+
     //------------Activity/Fragment Lifecycle------------
 
     @Override