Refactorization of the app (#31)

* Refactor LoadingTask
* Remove LoadingTask class
* Fix context leak in LoginTask
* Refactorisation GradesFragment
* Refactorization synchronization
* Fix leak in VulcanService
* Update mockito
* Add more tests for EntitiesCompare
* Fix Instant Run
* Add margin to grades
* Update ci android image

.circleci/config.yml

@@ -7,7 +7,7 @@ references:
 
   container_config: &container_config
     docker:
-      - image: circleci/android:api-26-alpha
+      - image: circleci/android:api-27-alpha
     working_directory: *workspace_root
     environment:
       environment:

.gitlab-ci.yml

@@ -1,4 +1,4 @@
-image: circleci/android:api-25-alpha
+image: circleci/android:api-27-alpha
 
 before_script:
     - export GRADLE_USER_HOME=`pwd`/.gradle

app/build.gradle

@@ -62,10 +62,10 @@ dependencies {
     debugCompile 'com.amitshekhar.android:debug-db:1.0.1'
     debugCompile 'net.zetetic:android-database-sqlcipher:3.5.7@aar'
 
-    androidTestCompile 'org.mockito:mockito-android:2.10.0'
+    androidTestCompile 'org.mockito:mockito-android:2.11.0'
     
     testCompile 'junit:junit:4.12'
-    testCompile 'org.mockito:mockito-core:2.10.0'
+    testCompile 'org.mockito:mockito-core:2.11.0'
 
     androidTestCompile('com.android.support.test.espresso:espresso-core:3.0.1', {
         exclude group: 'com.android.support', module: 'support-annotations'

app/src/androidTest/java/io/github/wulkanowy/services/synchronization/CurrentAccountLoginTest.java

@@ -27,10 +27,10 @@ import io.github.wulkanowy.dao.entities.DaoSession;
 import io.github.wulkanowy.security.CryptoException;
 import io.github.wulkanowy.security.Safety;
 import io.github.wulkanowy.services.LoginSession;
-import io.github.wulkanowy.services.synchronisation.AccountAuthorization;
+import io.github.wulkanowy.services.synchronisation.CurrentAccountLogin;
 
 @RunWith(AndroidJUnit4.class)
-public class AccountAuthorizationTest {
+public class CurrentAccountLoginTest {
 
     private static DaoSession daoSession;
 
@@ -62,8 +62,8 @@ public class AccountAuthorizationTest {
     public void emptyUserIdTest() throws CryptoException, BadCredentialsException,
             AccountPermissionException, IOException, LoginErrorException {
 
-        AccountAuthorization accountAuthorization = new AccountAuthorization(context, daoSession, new Vulcan());
+        CurrentAccountLogin currentAccountLogin = new CurrentAccountLogin(context, daoSession, new Vulcan());
-        accountAuthorization.loginCurrentUser();
+        currentAccountLogin.loginCurrentUser();
     }
 
     @Test
@@ -82,8 +82,8 @@ public class AccountAuthorizationTest {
         Vulcan vulcan = Mockito.mock(Vulcan.class);
         Mockito.doNothing().when(vulcan).login("TEST@TEST", "TEST", "TEST_SYMBOL", "TEST_ID");
 
-        AccountAuthorization accountAuthorization = new AccountAuthorization(targetContext, daoSession, vulcan);
+        CurrentAccountLogin currentAccountLogin = new CurrentAccountLogin(targetContext, daoSession, vulcan);
-        LoginSession loginSession = accountAuthorization.loginCurrentUser();
+        LoginSession loginSession = currentAccountLogin.loginCurrentUser();
 
         Assert.assertNotNull(loginSession);
         Assert.assertEquals(loginSession.getUserId(), userId);

app/src/androidTest/java/io/github/wulkanowy/services/synchronization/FirstAccountLoginTest.java

@@ -22,9 +22,9 @@ import io.github.wulkanowy.dao.entities.DaoMaster;
 import io.github.wulkanowy.dao.entities.DaoSession;
 import io.github.wulkanowy.security.Safety;
 import io.github.wulkanowy.services.LoginSession;
-import io.github.wulkanowy.services.synchronisation.AccountRegistration;
+import io.github.wulkanowy.services.synchronisation.FirstAccountLogin;
 
-public class AccountRegistrationTest {
+public class FirstAccountLoginTest {
 
     private static DaoSession daoSession;
 
@@ -55,9 +55,9 @@ public class AccountRegistrationTest {
         Login login = Mockito.mock(Login.class);
         Mockito.when(login.sendCredentials(Mockito.anyString(), Mockito.anyString(), Mockito.anyString()))
                 .thenReturn(certificate);
-        AccountRegistration accountRegistration = new AccountRegistration(login, new Vulcan(), "TEST@TEST", "TEST_PASS", "TEST_SYMBOL");
+        FirstAccountLogin firstAccountLogin = new FirstAccountLogin(login, new Vulcan(), "TEST@TEST", "TEST_PASS", "TEST_SYMBOL");
 
-        Assert.assertEquals(certificate, accountRegistration.connect());
+        Assert.assertEquals(certificate, firstAccountLogin.connect());
     }
 
     @Test
@@ -79,8 +79,8 @@ public class AccountRegistrationTest {
         Login login = Mockito.mock(Login.class);
         Mockito.when(login.sendCertificate(Mockito.anyString(), Mockito.anyString())).thenReturn("TEST-SYMBOL");
 
-        AccountRegistration accountRegistration = new AccountRegistration(login, vulcan, "TEST@TEST", "TEST-PASS", "default");
+        FirstAccountLogin firstAccountLogin = new FirstAccountLogin(login, vulcan, "TEST@TEST", "TEST-PASS", "default");
-        LoginSession loginSession = accountRegistration.login(targetContext, daoSession, "<xml>cert</xml>");
+        LoginSession loginSession = firstAccountLogin.login(targetContext, daoSession, "<xml>cert</xml>");
 
         Long userId = targetContext.getSharedPreferences("LoginData", Context.MODE_PRIVATE).getLong("userId", 0);
 

app/src/androidTest/java/io/github/wulkanowy/services/synchronization/GradeSynchronizationTest.java

@@ -47,7 +47,7 @@ public class GradeSynchronizationTest {
     }
 
     @Test
-    public void syncGradesEmptyBaseTest() throws Exception {
+    public void syncGradesEmptyDatabaseTest() throws Exception {
         Long userId = daoSession.getAccountDao().insert(new Account().setEmail("TEST@TEST"));
         Long subjectId = daoSession.getSubjectDao().insert(new Subject().setName("Matematyka").setUserId(userId));
 
@@ -75,7 +75,7 @@ public class GradeSynchronizationTest {
         Assert.assertEquals(subjectId, grade.getSubjectId());
         Assert.assertEquals("Matematyka", grade.getSubject());
         Assert.assertEquals("5", grade.getValue());
-        Assert.assertTrue(grade.getIsNew());
+        Assert.assertFalse(grade.getIsNew());
     }
 
     @AfterClass

app/src/main/java/io/github/wulkanowy/activity/dashboard/DashboardActivity.java

@@ -3,6 +3,7 @@ package io.github.wulkanowy.activity.dashboard;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.design.widget.BottomNavigationView;
+import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentTransaction;
 import android.support.v7.app.AppCompatActivity;
 import android.view.MenuItem;
@@ -15,6 +16,8 @@ import io.github.wulkanowy.activity.dashboard.lessonplan.LessonPlanFragment;
 
 public class DashboardActivity extends AppCompatActivity {
 
+    private Fragment currentFragment;
+
     private GradesFragment gradesFragment = new GradesFragment();
 
     private AttendanceFragment attendanceFragment = new AttendanceFragment();
@@ -28,35 +31,32 @@ public class DashboardActivity extends AppCompatActivity {
 
         @Override
         public boolean onNavigationItemSelected(@NonNull MenuItem item) {
-
-            FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
-
             switch (item.getItemId()) {
                 case R.id.navigation_marks:
                     setTitle(R.string.grades_text);
-                    transaction.replace(R.id.fragment_container, gradesFragment);
+                    currentFragment = gradesFragment;
-                    transaction.commit();
+                    break;
-                    return true;
 
                 case R.id.navigation_attendance:
                     setTitle(R.string.attendance_text);
-                    transaction.replace(R.id.fragment_container, attendanceFragment);
+                    currentFragment = attendanceFragment;
-                    transaction.commit();
+                    break;
-                    return true;
 
                 case R.id.navigation_lessonplan:
                     setTitle(R.string.lessonplan_text);
-                    transaction.replace(R.id.fragment_container, lessonPlanFragment);
+                    currentFragment = lessonPlanFragment;
-                    transaction.commit();
+                    break;
-                    return true;
 
                 case R.id.navigation_dashboard:
                 default:
                     setTitle(R.string.dashboard_text);
-                    transaction.replace(R.id.fragment_container, boardFragment);
+                    currentFragment = boardFragment;
-                    transaction.commit();
+                    break;
-                    return true;
             }
+            FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
+            transaction.replace(R.id.fragment_container, currentFragment);
+            transaction.commit();
+            return true;
         }
     };
 
@@ -65,14 +65,27 @@ public class DashboardActivity extends AppCompatActivity {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_dashboard);
 
-        setTitle(R.string.dashboard_text);
-
         BottomNavigationView navigation = findViewById(R.id.navigation);
         navigation.setSelectedItemId(R.id.navigation_dashboard);
         navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
 
+        if (savedInstanceState != null) {
+            currentFragment = getSupportFragmentManager().getFragment(savedInstanceState, "currentFragment");
+            setTitle(savedInstanceState.getString("activityTitle"));
+        } else {
+            currentFragment = boardFragment;
+            setTitle(R.string.dashboard_text);
+        }
+
         getSupportFragmentManager().beginTransaction()
-                .replace(R.id.fragment_container, boardFragment).commit();
+                .replace(R.id.fragment_container, currentFragment).commit();
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putString("activityTitle", getTitle().toString());
+        getSupportFragmentManager().putFragment(outState, "currentFragment", currentFragment);
     }
 
     public void onBackPressed() {

app/src/main/java/io/github/wulkanowy/activity/dashboard/attendance/AttendanceFragment.java

@@ -1,6 +1,7 @@
 package io.github.wulkanowy.activity.dashboard.attendance;
 
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -11,7 +12,7 @@ import io.github.wulkanowy.R;
 public class AttendanceFragment extends Fragment {
 
     @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         return inflater.inflate(R.layout.fragment_attendance, container, false);
     }

app/src/main/java/io/github/wulkanowy/activity/dashboard/board/BoardFragment.java

@@ -1,6 +1,7 @@
 package io.github.wulkanowy.activity.dashboard.board;
 
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -11,7 +12,7 @@ import io.github.wulkanowy.R;
 public class BoardFragment extends Fragment {
 
     @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         return inflater.inflate(R.layout.fragment_board, container, false);
     }

app/src/main/java/io/github/wulkanowy/activity/dashboard/grades/GradesDialogFragment.java

@@ -1,6 +1,7 @@
 package io.github.wulkanowy.activity.dashboard.grades;
 
 
+import android.app.Dialog;
 import android.app.DialogFragment;
 import android.os.Bundle;
 import android.view.LayoutInflater;
@@ -20,6 +21,10 @@ public class GradesDialogFragment extends DialogFragment {
         return new GradesDialogFragment().setGrade(grade);
     }
 
+    public GradesDialogFragment() {
+        setRetainInstance(true);
+    }
+
     public GradesDialogFragment setGrade(Grade grade) {
         this.grade = grade;
         return this;
@@ -50,7 +55,7 @@ public class GradesDialogFragment extends DialogFragment {
                 descriptionText.setText(grade.getSymbol());
             }
         } else if (!"".equals(grade.getSymbol())) {
-            descriptionText.setText(grade.getSymbol() + " - " + grade.getDescription());
+            descriptionText.setText(String.format("%1$s - %2$s", grade.getSymbol(), grade.getDescription()));
         } else {
             descriptionText.setText(grade.getDescription());
         }
@@ -69,6 +74,16 @@ public class GradesDialogFragment extends DialogFragment {
         return view;
     }
 
+    @Override
+    public void onDestroyView() {
+        Dialog dialog = getDialog();
+        if (dialog != null && getRetainInstance()) {
+            dialog.setDismissMessage(null);
+        }
+        super.onDestroyView();
+    }
+
+
     public static int colorHexToColorName(String hexColor) {
         switch (hexColor) {
             case "000000": {

app/src/main/java/io/github/wulkanowy/activity/dashboard/grades/GradesFragment.java

@@ -1,8 +1,10 @@
 package io.github.wulkanowy.activity.dashboard.grades;
 
+import android.app.Activity;
 import android.content.Context;
 import android.os.AsyncTask;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.design.widget.Snackbar;
 import android.support.v4.app.Fragment;
 import android.support.v4.widget.SwipeRefreshLayout;
@@ -14,6 +16,7 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Toast;
 
+import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -33,20 +36,39 @@ import io.github.wulkanowy.utilities.ConnectionUtilities;
 
 public class GradesFragment extends Fragment {
 
-    private List<SubjectWithGrades> subjectWithGradesList = new ArrayList<>();
+    private static List<SubjectWithGrades> subjectWithGradesList = new ArrayList<>();
 
-    private SwipeRefreshLayout swipeRefreshLayout;
+    private static long userId;
-
-    private View view;
-
-    private RefreshTask refreshTask;
 
     @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
-        view = inflater.inflate(R.layout.fragment_grades, container, false);
+        DaoSession daoSession;
+
+        View view = inflater.inflate(R.layout.fragment_grades, container, false);
+
+        if (getActivity() != null) {
+            daoSession = ((WulkanowyApp) getActivity().getApplication()).getDaoSession();
+            userId = getActivity().getSharedPreferences("LoginData", Context.MODE_PRIVATE)
+                    .getLong("userId", 0);
+
+            prepareRefreshLayout(view, daoSession);
+
+            if (subjectWithGradesList.equals(new ArrayList<>())) {
+                createExpList(view, getActivity());
+                new GenerateListTask(getActivity(), view, daoSession).execute();
+            } else {
+                createExpList(view, getActivity());
+                view.findViewById(R.id.loadingPanel).setVisibility(View.INVISIBLE);
+            }
+        }
+        return view;
+    }
+
+    private void prepareRefreshLayout(final View mainView, final DaoSession daoSession) {
+
+        final SwipeRefreshLayout swipeRefreshLayout = mainView.findViewById(R.id.grade_swipe_refresh);
 
-        swipeRefreshLayout = view.findViewById(R.id.grade_swipe_refresh);
         swipeRefreshLayout.setColorSchemeResources(android.R.color.black,
                 android.R.color.holo_blue_bright,
                 android.R.color.holo_green_light,
@@ -56,47 +78,27 @@ public class GradesFragment extends Fragment {
         swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
             @Override
             public void onRefresh() {
-                if (!ConnectionUtilities.isOnline(view.getContext())) {
+                if (ConnectionUtilities.isOnline(getContext())) {
-                    swipeRefreshLayout.setRefreshing(false);
+                    new RefreshTask(getActivity(), mainView, daoSession).execute();
-                    Toast.makeText(view.getContext(), R.string.noInternet_text, Toast.LENGTH_SHORT).show();
                 } else {
-                    refreshTask = new RefreshTask();
+                    Toast.makeText(mainView.getContext(), R.string.noInternet_text, Toast.LENGTH_SHORT).show();
-                    refreshTask.execute(((WulkanowyApp) getActivity().getApplication()).getDaoSession());
+                    swipeRefreshLayout.setRefreshing(false);
                 }
             }
         });
-
-        if (new ArrayList<>().equals(subjectWithGradesList)) {
-            createExpListView();
-            new GradesTask().execute(((WulkanowyApp) getActivity().getApplication()).getDaoSession());
-        } else if (subjectWithGradesList.size() > 0) {
-            createExpListView();
-            view.findViewById(R.id.loadingPanel).setVisibility(View.GONE);
-        }
-        return view;
     }
 
-    @Override
+    private static void createExpList(View mainView, Activity activity) {
-    public void onDestroyView() {
-        super.onDestroyView();
-        if (refreshTask != null && refreshTask.getStatus() == AsyncTask.Status.RUNNING) {
-            refreshTask.cancel(true);
-        }
-    }
 
-    private void createExpListView() {
+        RecyclerView recyclerView = mainView.findViewById(R.id.subject_grade_recycler);
-
+        recyclerView.setLayoutManager(new LinearLayoutManager(activity));
-        RecyclerView recyclerView = view.findViewById(R.id.subject_grade_recycler);
+        GradesAdapter gradesAdapter = new GradesAdapter(subjectWithGradesList, activity);
-        recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
-        GradesAdapter gradesAdapter = new GradesAdapter(subjectWithGradesList, getActivity());
         recyclerView.setAdapter(gradesAdapter);
     }
 
-    private void prepareSubjectsWithGradesList(DaoSession daoSession) {
+    private static void downloadGradesFormDatabase(DaoSession daoSession) {
-        subjectWithGradesList = new ArrayList<>();
 
-        long userId = getContext().getSharedPreferences("LoginData", Context.MODE_PRIVATE)
+        subjectWithGradesList = new ArrayList<>();
-                .getLong("userId", 0);
 
         AccountDao accountDao = daoSession.getAccountDao();
         Account account = accountDao.load(userId);
@@ -110,31 +112,54 @@ public class GradesFragment extends Fragment {
         }
     }
 
-    private class GradesTask extends AsyncTask<DaoSession, Void, Void> {
+    private static class GenerateListTask extends AsyncTask<Void, Void, Void> {
+
+        private WeakReference<View> mainView;
+
+        private WeakReference<Activity> activity;
+
+        private DaoSession daoSession;
+
+        public GenerateListTask(Activity activity, View mainView, DaoSession daoSession) {
+            this.activity = new WeakReference<>(activity);
+            this.mainView = new WeakReference<>(mainView);
+            this.daoSession = daoSession;
+        }
 
         @Override
-        protected Void doInBackground(DaoSession... params) {
+        protected Void doInBackground(Void... params) {
-            prepareSubjectsWithGradesList(params[0]);
+            downloadGradesFormDatabase(daoSession);
             return null;
         }
 
         protected void onPostExecute(Void result) {
             super.onPostExecute(result);
-
+            createExpList(mainView.get(), activity.get());
-            createExpListView();
+            mainView.get().findViewById(R.id.loadingPanel).setVisibility(View.INVISIBLE);
-            view.findViewById(R.id.loadingPanel).setVisibility(View.GONE);
         }
     }
 
-    private class RefreshTask extends AsyncTask<DaoSession, Void, Boolean> {
+    private static class RefreshTask extends AsyncTask<Void, Void, Boolean> {
+
+        private DaoSession daoSession;
+
+        private WeakReference<Activity> activity;
+
+        private WeakReference<View> mainView;
+
+        public RefreshTask(Activity activity, View mainView, DaoSession daoSession) {
+            this.activity = new WeakReference<>(activity);
+            this.daoSession = daoSession;
+            this.mainView = new WeakReference<>(mainView);
+        }
 
         @Override
-        protected Boolean doInBackground(DaoSession... params) {
+        protected Boolean doInBackground(Void... params) {
             VulcanSynchronization vulcanSynchronization = new VulcanSynchronization(new LoginSession());
             try {
-                vulcanSynchronization.loginCurrentUser(getContext(), params[0], new Vulcan());
+                vulcanSynchronization.loginCurrentUser(activity.get(), daoSession, new Vulcan());
                 vulcanSynchronization.syncGrades();
-                prepareSubjectsWithGradesList(params[0]);
+                downloadGradesFormDatabase(daoSession);
                 return true;
             } catch (Exception e) {
                 Log.e(VulcanJobHelper.DEBUG_TAG, "There was a synchronization problem", e);
@@ -147,24 +172,27 @@ public class GradesFragment extends Fragment {
             super.onPostExecute(result);
 
             if (result) {
-                prepareSubjectsWithGradesList(((WulkanowyApp) getActivity().getApplication()).getDaoSession());
+                if (mainView.get() != null && activity.get() != null) {
-                createExpListView();
+                    createExpList(mainView.get(), activity.get());
-                swipeRefreshLayout.setRefreshing(false);
+                }
 
-
+                int volumeGrades = DatabaseAccess.getNewGrades(daoSession).size();
-                int volumeGrades = DatabaseAccess.getNewGrades(((WulkanowyApp) getActivity().getApplication()).getDaoSession()).size();
 
                 if (volumeGrades == 0) {
-                    Snackbar.make(getActivity().findViewById(R.id.fragment_container),
+                    Snackbar.make(activity.get().findViewById(R.id.fragment_container),
                             R.string.snackbar_no_grades,
                             Snackbar.LENGTH_SHORT).show();
                 } else {
-                    Snackbar.make(getActivity().findViewById(R.id.fragment_container),
+                    Snackbar.make(activity.get().findViewById(R.id.fragment_container),
-                            getString(R.string.snackbar_new_grade, volumeGrades),
+                            activity.get().getString(R.string.snackbar_new_grade, volumeGrades),
                             Snackbar.LENGTH_SHORT).show();
                 }
             } else {
-                Toast.makeText(getContext(), R.string.refresh_error_text, Toast.LENGTH_SHORT).show();
+                Toast.makeText(activity.get(), R.string.refresh_error_text, Toast.LENGTH_SHORT).show();
+            }
+
+            if (mainView.get() != null) {
+                SwipeRefreshLayout swipeRefreshLayout = mainView.get().findViewById(R.id.grade_swipe_refresh);
                 swipeRefreshLayout.setRefreshing(false);
             }
         }

app/src/main/java/io/github/wulkanowy/activity/dashboard/lessonplan/LessonPlanFragment.java

@@ -1,6 +1,7 @@
 package io.github.wulkanowy.activity.dashboard.lessonplan;
 
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -14,8 +15,8 @@ public class LessonPlanFragment extends Fragment {
     }
 
     @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
-            Bundle savedInstanceState) {
+                             Bundle savedInstanceState) {
         return inflater.inflate(R.layout.fragment_lessonplan, container, false);
     }
 }

app/src/main/java/io/github/wulkanowy/activity/login/LoginActivity.java

@@ -144,8 +144,8 @@ public class LoginActivity extends Activity {
             symbol = "Default";
         }
 
-        String[] keys = this.getResources().getStringArray(R.array.symbols);
+        String[] keys = getResources().getStringArray(R.array.symbols);
-        String[] values = this.getResources().getStringArray(R.array.symbols_values);
+        String[] values = getResources().getStringArray(R.array.symbols_values);
         LinkedHashMap<String, String> map = new LinkedHashMap<>();
 
         for (int i = 0; i < Math.min(keys.length, values.length); ++i) {
@@ -198,9 +198,9 @@ public class LoginActivity extends Activity {
                     float y = ev.getRawY() + view.getTop() - scrcoords[1];
                     if (x < view.getLeft() || x > view.getRight() || y < view.getTop()
                             || y > view.getBottom()) {
-                        ((InputMethodManager) this.getSystemService(
+                        ((InputMethodManager) getSystemService(
                                 Context.INPUT_METHOD_SERVICE)).hideSoftInputFromWindow(
-                                (this.getWindow().getDecorView().getApplicationWindowToken()), 0);
+                                (getWindow().getDecorView().getApplicationWindowToken()), 0);
                     }
                 }
             }

app/src/main/java/io/github/wulkanowy/activity/login/LoginTask.java

@@ -12,21 +12,19 @@ import android.widget.EditText;
 import android.widget.TextView;
 
 import java.io.IOException;
+import java.lang.ref.WeakReference;
 
 import io.github.wulkanowy.R;
 import io.github.wulkanowy.activity.WulkanowyApp;
 import io.github.wulkanowy.activity.dashboard.DashboardActivity;
-import io.github.wulkanowy.api.Cookies;
-import io.github.wulkanowy.api.Vulcan;
 import io.github.wulkanowy.api.login.AccountPermissionException;
 import io.github.wulkanowy.api.login.BadCredentialsException;
-import io.github.wulkanowy.api.login.Login;
 import io.github.wulkanowy.api.login.NotLoggedInErrorException;
 import io.github.wulkanowy.dao.entities.DaoSession;
 import io.github.wulkanowy.security.CryptoException;
 import io.github.wulkanowy.services.LoginSession;
 import io.github.wulkanowy.services.VulcanSynchronization;
-import io.github.wulkanowy.services.synchronisation.AccountRegistration;
+import io.github.wulkanowy.services.jobs.GradeJob;
 import io.github.wulkanowy.utilities.ConnectionUtilities;
 
 /**
@@ -41,16 +39,16 @@ public class LoginTask extends AsyncTask<Void, String, Integer> {
 
     private final String symbol;
 
-    private Activity activity;
+    private WeakReference<Activity> activity;
 
-    private View progressView;
+    private WeakReference<View> progressView;
 
-    private View loginFormView;
+    private WeakReference<View> loginFormView;
 
-    private TextView showText;
+    private WeakReference<TextView> showText;
 
     public LoginTask(Activity activity, String email, String password, String symbol) {
-        this.activity = activity;
+        this.activity = new WeakReference<>(activity);
         this.email = email;
         this.password = password;
         this.symbol = symbol;
@@ -58,28 +56,24 @@ public class LoginTask extends AsyncTask<Void, String, Integer> {
 
     @Override
     protected void onPreExecute() {
-        showText = activity.findViewById(R.id.login_progress_text);
+        showText = new WeakReference<>((TextView) activity.get().findViewById(R.id.login_progress_text));
     }
 
     @Override
     protected Integer doInBackground(Void... params) {
-        if (ConnectionUtilities.isOnline(activity)) {
+        if (ConnectionUtilities.isOnline(activity.get())) {
-            AccountRegistration accountRegistration = new AccountRegistration(
+            VulcanSynchronization vulcanSynchronization = new VulcanSynchronization(new LoginSession());
-                    new Login(new Cookies()),
-                    new Vulcan(),
-                    email, password, symbol);
 
-            DaoSession daoSession = ((WulkanowyApp) activity.getApplication()).getDaoSession();
+            DaoSession daoSession = ((WulkanowyApp) activity.get().getApplication()).getDaoSession();
 
             try {
-                publishProgress("1", activity.getResources().getString(R.string.step_connecting));
+                publishProgress("1", activity.get().getResources().getString(R.string.step_connecting));
-                String certificate = accountRegistration.connect();
+                vulcanSynchronization.firstLoginConnectStep(email, password, symbol);
 
-                publishProgress("2", activity.getResources().getString(R.string.step_login));
+                publishProgress("2", activity.get().getResources().getString(R.string.step_login));
-                LoginSession loginSession = accountRegistration.login(activity, daoSession, certificate);
+                vulcanSynchronization.firstLoginSignInStep(activity.get(), daoSession);
 
-                publishProgress("3", activity.getResources().getString(R.string.step_synchronization));
+                publishProgress("3", activity.get().getResources().getString(R.string.step_synchronization));
-                VulcanSynchronization vulcanSynchronization = new VulcanSynchronization(loginSession);
                 vulcanSynchronization.syncSubjectsAndGrades();
 
             } catch (BadCredentialsException e) {
@@ -92,7 +86,8 @@ public class LoginTask extends AsyncTask<Void, String, Integer> {
                 return R.string.login_denied_text;
             }
 
-            accountRegistration.scheduleSynchronization(activity);
+            GradeJob gradeJob = new GradeJob();
+            gradeJob.scheduledJob(activity.get());
 
             return R.string.login_accepted_text;
 
@@ -103,7 +98,7 @@ public class LoginTask extends AsyncTask<Void, String, Integer> {
 
     @Override
     protected void onProgressUpdate(String... progress) {
-        showText.setText(progress[0] + "/3 - " + progress[1] + "...");
+        showText.get().setText(String.format("%1$s/3 - %2$s...", progress[0], progress[1]));
     }
 
     @Override
@@ -113,33 +108,32 @@ public class LoginTask extends AsyncTask<Void, String, Integer> {
         switch (messageID) {
             // if success
             case R.string.login_accepted_text:
-                Intent intent = new Intent(activity, DashboardActivity.class);
+                Intent intent = new Intent(activity.get(), DashboardActivity.class);
-                activity.finish();
+                activity.get().finish();
-                activity.startActivity(intent);
+                activity.get().startActivity(intent);
                 break;
 
             // if bad credentials entered
             case R.string.login_bad_credentials_text:
-                EditText passwordView = activity.findViewById(R.id.password);
+                EditText passwordView = activity.get().findViewById(R.id.password);
-                passwordView.setError(activity.getString(R.string.error_incorrect_password));
+                passwordView.setError(activity.get().getString(R.string.error_incorrect_password));
                 passwordView.requestFocus();
                 break;
 
             // if no permission
             case R.string.error_bad_account_permission:
                 // Change to visible symbol input view
-                TextInputLayout symbolLayout = activity.findViewById(R.id.to_symbol_input_layout);
+                TextInputLayout symbolLayout = activity.get().findViewById(R.id.to_symbol_input_layout);
                 symbolLayout.setVisibility(View.VISIBLE);
 
-                EditText symbolView = activity.findViewById(R.id.symbol);
+                EditText symbolView = activity.get().findViewById(R.id.symbol);
-                symbolView.setError(activity.getString(R.string.error_bad_account_permission));
+                symbolView.setError(activity.get().getString(R.string.error_bad_account_permission));
                 symbolView.requestFocus();
                 break;
 
             default:
-                Snackbar
+                Snackbar.make(activity.get().findViewById(R.id.coordinatorLayout),
-                        .make(activity.findViewById(R.id.coordinatorLayout), messageID, Snackbar.LENGTH_LONG)
+                        messageID, Snackbar.LENGTH_LONG).show();
-                        .show();
                 break;
         }
     }
@@ -153,33 +147,33 @@ public class LoginTask extends AsyncTask<Void, String, Integer> {
      * Shows the progress UI and hides the login form.
      */
     public void showProgress(final boolean show) {
-        loginFormView = activity.findViewById(R.id.login_form);
+        loginFormView = new WeakReference<>(activity.get().findViewById(R.id.login_form));
-        progressView = activity.findViewById(R.id.login_progress);
+        progressView = new WeakReference<>(activity.get().findViewById(R.id.login_progress));
 
-        int animTime = activity.getResources().getInteger(android.R.integer.config_shortAnimTime);
+        int animTime = activity.get().getResources().getInteger(android.R.integer.config_shortAnimTime);
 
         changeLoginFormVisibility(show, animTime);
         changeProgressVisibility(show, animTime);
     }
 
     private void changeLoginFormVisibility(final boolean show, final int animTime) {
-        loginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
+        loginFormView.get().setVisibility(show ? View.GONE : View.VISIBLE);
-        loginFormView.animate().setDuration(animTime).alpha(
+        loginFormView.get().animate().setDuration(animTime).alpha(
                 show ? 0 : 1).setListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationEnd(Animator animation) {
-                loginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
+                loginFormView.get().setVisibility(show ? View.GONE : View.VISIBLE);
             }
         });
     }
 
     private void changeProgressVisibility(final boolean show, final int animTime) {
-        progressView.setVisibility(show ? View.VISIBLE : View.GONE);
+        progressView.get().setVisibility(show ? View.VISIBLE : View.GONE);
-        progressView.animate().setDuration(animTime).alpha(
+        progressView.get().animate().setDuration(animTime).alpha(
                 show ? 1 : 0).setListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationEnd(Animator animation) {
-                progressView.setVisibility(show ? View.VISIBLE : View.GONE);
+                progressView.get().setVisibility(show ? View.VISIBLE : View.GONE);
             }
         });
     }

app/src/main/java/io/github/wulkanowy/activity/splash/LoadingTask.java

@@ -1,53 +0,0 @@
-package io.github.wulkanowy.activity.splash;
-
-import android.content.Context;
-import android.content.Intent;
-import android.os.AsyncTask;
-import android.widget.Toast;
-
-import io.github.wulkanowy.R;
-import io.github.wulkanowy.activity.dashboard.DashboardActivity;
-import io.github.wulkanowy.activity.login.LoginActivity;
-import io.github.wulkanowy.services.jobs.GradeJob;
-import io.github.wulkanowy.utilities.ConnectionUtilities;
-
-public class LoadingTask extends AsyncTask<Void, Void, Boolean> {
-
-    private Context context;
-
-    LoadingTask(Context context) {
-        this.context = context;
-    }
-
-    @Override
-    protected Boolean doInBackground(Void... voids) {
-
-        try {
-            Thread.sleep(500);
-        } catch (InterruptedException e) {
-            e.printStackTrace();
-        }
-
-        return ConnectionUtilities.isOnline(context);
-    }
-
-    protected void onPostExecute(Boolean result) {
-        super.onPostExecute(result);
-
-        if (!result) {
-            Toast.makeText(context, R.string.noInternet_text, Toast.LENGTH_LONG).show();
-        }
-
-        if (context.getSharedPreferences("LoginData", Context.MODE_PRIVATE).getLong("userId", 0) == 0) {
-            Intent intent = new Intent(context, LoginActivity.class);
-            context.startActivity(intent);
-        } else {
-            GradeJob gradesSync = new GradeJob();
-            gradesSync.scheduledJob(context);
-
-            Intent intent = new Intent(context, DashboardActivity.class);
-            context.startActivity(intent);
-        }
-
-    }
-}

app/src/main/java/io/github/wulkanowy/activity/splash/SplashActivity.java

@@ -1,11 +1,17 @@
 package io.github.wulkanowy.activity.splash;
 
+import android.content.Context;
+import android.content.Intent;
 import android.os.Bundle;
+import android.os.Handler;
 import android.support.v7.app.AppCompatActivity;
 import android.widget.TextView;
 
 import io.github.wulkanowy.BuildConfig;
 import io.github.wulkanowy.R;
+import io.github.wulkanowy.activity.dashboard.DashboardActivity;
+import io.github.wulkanowy.activity.login.LoginActivity;
+import io.github.wulkanowy.services.jobs.GradeJob;
 
 public class SplashActivity extends AppCompatActivity {
 
@@ -15,8 +21,26 @@ public class SplashActivity extends AppCompatActivity {
         setContentView(R.layout.activity_splash);
 
         TextView versionName = findViewById(R.id.rawText);
-        versionName.setText(getText(R.string.version_text) + BuildConfig.VERSION_NAME);
+        versionName.setText(getString(R.string.version_text, BuildConfig.VERSION_NAME));
 
-        new LoadingTask(this).execute();
+        new Handler().postDelayed(new Runnable() {
+            @Override
+            public void run() {
+                executeOnRunApp();
+            }
+        }, 500);
+    }
+
+    private void executeOnRunApp() {
+        if (getSharedPreferences("LoginData", Context.MODE_PRIVATE).getLong("userId", 0) == 0) {
+            Intent intent = new Intent(this, LoginActivity.class);
+            startActivity(intent);
+        } else {
+            GradeJob gradesSync = new GradeJob();
+            gradesSync.scheduledJob(this);
+
+            Intent intent = new Intent(this, DashboardActivity.class);
+            startActivity(intent);
+        }
     }
 }

app/src/main/java/io/github/wulkanowy/dao/EntitiesCompare.java

@@ -18,9 +18,9 @@ public abstract class EntitiesCompare {
         List<Grade> lastList = new ArrayList<>();
 
         for (Grade grade : addedOrUpdatedGradeList) {
-            grade.setIsNew(true);
             if (oldList.size() != 0) {
                 grade.setRead(false);
+                grade.setIsNew(true);
             }
             updatedList.add(grade);
         }

app/src/main/java/io/github/wulkanowy/security/Safety.java

@@ -12,13 +12,11 @@ public class Safety extends Scrambler {
     public String encrypt(String email, String plainText, Context context) throws CryptoException, UnsupportedOperationException {
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
-
             loadKeyStore();
             generateNewKey(email, context);
             return encryptString(email, plainText);
         } else {
-
+            if (!RootUtilities.isRooted()) {
-            if (RootUtilities.isRooted()) {
                 return new String(Base64.encode(plainText.getBytes(), Base64.DEFAULT));
             } else {
                 Log.e(Scrambler.DEBUG_TAG, "Password store in this devices isn't safe because is rooted");
@@ -30,7 +28,6 @@ public class Safety extends Scrambler {
     public String decrypt(String email, String encryptedText) throws CryptoException {
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
-
             loadKeyStore();
             return decryptString(email, encryptedText);
         } else {

app/src/main/java/io/github/wulkanowy/security/Scrambler.java

@@ -36,7 +36,7 @@ public class Scrambler {
 
     private KeyStore keyStore;
 
-    public void loadKeyStore() throws CryptoException {
+    protected void loadKeyStore() throws CryptoException {
 
         try {
             keyStore = KeyStore.getInstance(ANDROID_KEYSTORE);

app/src/main/java/io/github/wulkanowy/services/VulcanSynchronization.java

@@ -5,14 +5,18 @@ import android.util.Log;
 
 import java.io.IOException;
 
+import io.github.wulkanowy.api.Cookies;
 import io.github.wulkanowy.api.Vulcan;
 import io.github.wulkanowy.api.login.AccountPermissionException;
 import io.github.wulkanowy.api.login.BadCredentialsException;
+import io.github.wulkanowy.api.login.Login;
 import io.github.wulkanowy.api.login.LoginErrorException;
+import io.github.wulkanowy.api.login.NotLoggedInErrorException;
 import io.github.wulkanowy.dao.entities.DaoSession;
 import io.github.wulkanowy.security.CryptoException;
 import io.github.wulkanowy.services.jobs.VulcanJobHelper;
-import io.github.wulkanowy.services.synchronisation.AccountAuthorization;
+import io.github.wulkanowy.services.synchronisation.CurrentAccountLogin;
+import io.github.wulkanowy.services.synchronisation.FirstAccountLogin;
 import io.github.wulkanowy.services.synchronisation.GradesSynchronisation;
 import io.github.wulkanowy.services.synchronisation.SubjectsSynchronisation;
 
@@ -20,38 +24,67 @@ public class VulcanSynchronization {
 
     private LoginSession loginSession;
 
+    private FirstAccountLogin firstAccountLogin;
+
+    private String certificate;
+
     public VulcanSynchronization(LoginSession loginSession) {
         this.loginSession = loginSession;
     }
 
+    public void firstLoginConnectStep(String email, String password, String symbol)
+            throws BadCredentialsException, IOException {
+        firstAccountLogin = new FirstAccountLogin(new Login(new Cookies()), new Vulcan(), email, password, symbol);
+        certificate = firstAccountLogin.connect();
+    }
+
+    public void firstLoginSignInStep(Context context, DaoSession daoSession)
+            throws NotLoggedInErrorException, AccountPermissionException, IOException, CryptoException {
+        if (firstAccountLogin != null && certificate != null) {
+            loginSession = firstAccountLogin.login(context, daoSession, certificate);
+        } else {
+            Log.e(VulcanJobHelper.DEBUG_TAG, "Before first login, should call firstLoginConnectStep",
+                    new UnsupportedOperationException());
+        }
+    }
+
     public void loginCurrentUser(Context context, DaoSession daoSession, Vulcan vulcan)
             throws CryptoException, BadCredentialsException, AccountPermissionException, LoginErrorException, IOException {
-
+        CurrentAccountLogin currentAccountLogin = new CurrentAccountLogin(context, daoSession, vulcan);
-        AccountAuthorization accountAuthorization = new AccountAuthorization(context, daoSession, vulcan);
+        loginSession = currentAccountLogin.loginCurrentUser();
-        loginSession = accountAuthorization.loginCurrentUser();
     }
 
     public boolean syncGrades() {
-        GradesSynchronisation gradesSynchronisation = new GradesSynchronisation();
+        if (loginSession != null) {
-
+            GradesSynchronisation gradesSynchronisation = new GradesSynchronisation();
-        try {
+            try {
-            gradesSynchronisation.sync(loginSession);
+                gradesSynchronisation.sync(loginSession);
-            return true;
+                return true;
-        } catch (Exception e) {
+            } catch (Exception e) {
-            Log.e(VulcanJobHelper.DEBUG_TAG, "Synchronisation of grades failed", e);
+                Log.e(VulcanJobHelper.DEBUG_TAG, "Synchronisation of grades failed", e);
+                return false;
+            }
+        } else {
+            Log.e(VulcanJobHelper.DEBUG_TAG, "Before synchronization, should login user to log",
+                    new UnsupportedOperationException());
             return false;
         }
     }
 
     public boolean syncSubjectsAndGrades() {
-        SubjectsSynchronisation subjectsSynchronisation = new SubjectsSynchronisation();
+        if (loginSession != null) {
-
+            SubjectsSynchronisation subjectsSynchronisation = new SubjectsSynchronisation();
-        try {
+            try {
-            subjectsSynchronisation.sync(loginSession);
+                subjectsSynchronisation.sync(loginSession);
-            syncGrades();
+                syncGrades();
-            return true;
+                return true;
-        } catch (Exception e) {
+            } catch (Exception e) {
-            Log.e(VulcanJobHelper.DEBUG_TAG, "Synchronisation of subjects failed", e);
+                Log.e(VulcanJobHelper.DEBUG_TAG, "Synchronisation of subjects failed", e);
+                return false;
+            }
+        } else {
+            Log.e(VulcanJobHelper.DEBUG_TAG, "Before synchronization, should login user to log",
+                    new UnsupportedOperationException());
             return false;
         }
     }

app/src/main/java/io/github/wulkanowy/services/jobs/GradeJob.java

@@ -21,11 +21,11 @@ import io.github.wulkanowy.services.VulcanSynchronization;
 
 public class GradeJob extends VulcanJobHelper {
 
-    public static final String UNIQUE_TAG = "GradesSync34512";
+    private static final String UNIQUE_TAG = "GradesSync34512";
 
-    public static final int DEFAULT_INTERVAL_START = 60 * 50;
+    private static final int DEFAULT_INTERVAL_START = 60 * 50;
 
-    public static final int DEFAULT_INTERVAL_END = DEFAULT_INTERVAL_START + (60 * 10);
+    private static final int DEFAULT_INTERVAL_END = DEFAULT_INTERVAL_START + (60 * 10);
 
     @Override
     protected Job createJob(FirebaseJobDispatcher dispatcher) {

app/src/main/java/io/github/wulkanowy/services/jobs/SubjectJob.java

@@ -21,11 +21,11 @@ import io.github.wulkanowy.services.VulcanSynchronization;
 
 public class SubjectJob extends VulcanJobHelper {
 
-    public static final String UNIQUE_TAG = "SubjectsSync34512";
+    private static final String UNIQUE_TAG = "SubjectsSync34512";
 
-    public static final int DEFAULT_INTERVAL_START = 0;
+    private static final int DEFAULT_INTERVAL_START = 0;
 
-    public static final int DEFAULT_INTERVAL_END = DEFAULT_INTERVAL_START + 10;
+    private static final int DEFAULT_INTERVAL_END = DEFAULT_INTERVAL_START + 10;
 
     @Override
     protected Job createJob(FirebaseJobDispatcher dispatcher) {

app/src/main/java/io/github/wulkanowy/services/jobs/VulcanService.java

@@ -7,6 +7,7 @@ import com.firebase.jobdispatcher.JobParameters;
 import com.firebase.jobdispatcher.JobService;
 
 import java.io.IOException;
+import java.lang.ref.WeakReference;
 
 import io.github.wulkanowy.api.login.AccountPermissionException;
 import io.github.wulkanowy.api.login.BadCredentialsException;
@@ -15,35 +16,47 @@ import io.github.wulkanowy.security.CryptoException;
 
 public abstract class VulcanService extends JobService {
 
-    private SyncTask syncTask = new SyncTask();
+    private SyncTask syncTask;
 
     @Override
     public boolean onStartJob(JobParameters params) {
         Log.d(VulcanJobHelper.DEBUG_TAG, "Wulkanowy services start");
-        syncTask.execute(params);
+        syncTask = new SyncTask(this, params);
+        syncTask.execute();
         return true;
     }
 
     @Override
     public boolean onStopJob(JobParameters params) {
-        Log.e(VulcanJobHelper.DEBUG_TAG, "Wulkanowy serives stop");
+        Log.e(VulcanJobHelper.DEBUG_TAG, "Wulkanowy services stop");
-        syncTask.cancel(true);
+        if (syncTask != null) {
+            syncTask.cancel(true);
+        }
         return true;
     }
 
     public abstract void workToBePerformed() throws CryptoException, BadCredentialsException,
             NotLoggedInErrorException, AccountPermissionException, IOException;
 
-    private class SyncTask extends AsyncTask<JobParameters, Void, Void> {
+    private static class SyncTask extends AsyncTask<Void, Void, Void> {
+
+        private JobParameters jobParameters;
+
+        private WeakReference<VulcanService> vulcanService;
+
+        public SyncTask(VulcanService vulcanService, JobParameters jobParameters) {
+            this.jobParameters = jobParameters;
+            this.vulcanService = new WeakReference<>(vulcanService);
+        }
 
         @Override
-        protected Void doInBackground(JobParameters... params) {
+        protected Void doInBackground(Void... voids) {
             try {
-                workToBePerformed();
+                vulcanService.get().workToBePerformed();
             } catch (Exception e) {
                 Log.e(VulcanJobHelper.DEBUG_TAG, "User logging in the background failed", e);
             } finally {
-                jobFinished(params[0], false);
+                vulcanService.get().jobFinished(jobParameters, false);
             }
             return null;
         }

app/src/main/java/io/github/wulkanowy/services/synchronisation/CurrentAccountLogin.java

@@ -17,7 +17,7 @@ import io.github.wulkanowy.security.Safety;
 import io.github.wulkanowy.services.LoginSession;
 import io.github.wulkanowy.services.jobs.VulcanJobHelper;
 
-public class AccountAuthorization {
+public class CurrentAccountLogin {
 
     private final Context context;
 
@@ -25,7 +25,7 @@ public class AccountAuthorization {
 
     private final Vulcan vulcan;
 
-    public AccountAuthorization(Context context, DaoSession daoSession, Vulcan vulcan) {
+    public CurrentAccountLogin(Context context, DaoSession daoSession, Vulcan vulcan) {
         this.context = context;
         this.daoSession = daoSession;
         this.vulcan = vulcan;

app/src/main/java/io/github/wulkanowy/services/synchronisation/FirstAccountLogin.java

@@ -16,9 +16,8 @@ import io.github.wulkanowy.dao.entities.DaoSession;
 import io.github.wulkanowy.security.CryptoException;
 import io.github.wulkanowy.security.Safety;
 import io.github.wulkanowy.services.LoginSession;
-import io.github.wulkanowy.services.jobs.GradeJob;
 
-public class AccountRegistration {
+public class FirstAccountLogin {
 
 
     private final Login login;
@@ -31,7 +30,7 @@ public class AccountRegistration {
 
     private final String symbol;
 
-    public AccountRegistration(Login login, Vulcan vulcan, String email, String password, String symbol) {
+    public FirstAccountLogin(Login login, Vulcan vulcan, String email, String password, String symbol) {
         this.login = login;
         this.vulcan = vulcan;
         this.email = email;
@@ -74,9 +73,4 @@ public class AccountRegistration {
                 .setUserId(userId)
                 .setDaoSession(daoSession);
     }
-
-    public void scheduleSynchronization(Context context) {
-        GradeJob gradesSync = new GradeJob();
-        gradesSync.scheduledJob(context);
-    }
 }

app/src/main/java/io/github/wulkanowy/utilities/ConnectionUtilities.java

@@ -9,7 +9,11 @@ public abstract class ConnectionUtilities {
     public static boolean isOnline(Context context) {
         ConnectivityManager connectivityManager =
                 (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
-        NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
+        if (connectivityManager != null) {
-        return networkInfo != null && networkInfo.isConnectedOrConnecting();
+            NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
+            return networkInfo != null && networkInfo.isConnectedOrConnecting();
+        } else {
+            return false;
+        }
     }
 }

app/src/main/java/io/github/wulkanowy/utilities/RootUtilities.java

@@ -8,8 +8,6 @@ import java.io.File;
 abstract public class RootUtilities {
 
     public static boolean isRooted() {
-
-
         String buildTags = Build.TAGS;
         if (buildTags != null && buildTags.contains("test-keys")) {
             return true;
@@ -23,7 +21,6 @@ abstract public class RootUtilities {
         } catch (Exception e1) {
             // ignore
         }
-
         return canExecuteCommand("/system/xbin/which su")
                 || canExecuteCommand("/system/bin/which su") || canExecuteCommand("which su");
     }
@@ -36,7 +33,6 @@ abstract public class RootUtilities {
         } catch (Exception e) {
             executedSuccesfully = false;
         }
-
         return executedSuccesfully;
     }
 }

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

@@ -5,6 +5,18 @@
     android:layout_height="match_parent"
     tools:context="io.github.wulkanowy.activity.dashboard.grades.GradesFragment">
 
+    <RelativeLayout
+        android:id="@+id/loadingPanel"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center">
+
+        <ProgressBar
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:indeterminate="true" />
+    </RelativeLayout>
+
     <android.support.v4.widget.SwipeRefreshLayout
         android:id="@+id/grade_swipe_refresh"
         android:layout_width="match_parent"
@@ -15,18 +27,6 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent" />
 
-        <RelativeLayout
-            android:id="@+id/loadingPanel"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:gravity="center">
-
-            <ProgressBar
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:indeterminate="true" />
-        </RelativeLayout>
-
     </android.support.v4.widget.SwipeRefreshLayout>
 
 </android.support.design.widget.CoordinatorLayout>

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

@@ -8,7 +8,7 @@
     android:layout_marginLeft="5dp"
     android:layout_marginRight="5dp"
     android:layout_marginStart="5dp"
-    android:layout_marginTop="5dp"
+    android:layout_marginBottom="10dp"
     android:foreground="?attr/selectableItemBackgroundBorderless"
     card_view:cardElevation="0dp">
 
@@ -19,8 +19,7 @@
         android:layout_marginEnd="7dp"
         android:layout_marginLeft="7dp"
         android:layout_marginRight="7dp"
-        android:layout_marginStart="7dp"
+        android:layout_marginStart="7dp">
-        android:layout_marginTop="7dp">
 
         <TextView
             android:id="@+id/grade_text"

app/src/main/res/values-pl/strings.xml

@@ -32,7 +32,7 @@
     <string name="noInternet_text">Brak połączenia z internetem</string>
     <string name="root_failed_text">To urządzenie posiada posiada podwyższone uprawnienia (root). Automatyczne logowanie zosatło wyłączone.</string>
     <string name="encrypt_failed_text">Szyfrowanie nie powiodło się. Automatyczne logowanie zostało wyłączone</string>
-    <string name="version_text">Wersja\u0020</string>
+    <string name="version_text">Wersja %1$s</string>
     <string name="dialog_description_text">Opis</string>
     <string name="dialog_weight_text">Waga</string>
     <string name="noDescription_text">Brak opisu</string>

app/src/main/res/values/strings.xml

@@ -23,29 +23,33 @@
     <string name="action_create_account">No account yet? Create one</string>
     <string name="action_forgot_password">Forgot password?</string>
 
+    <string name="color_black_text">Black</string>
+    <string name="color_red_text">Red</string>
+    <string name="color_blue_text">Blue</string>
+    <string name="color_green_text">Green</string>
+    <string name="noColor_text">No color</string>
+
     <string name="activity_dashboard_text">Dashboard Activity</string>
     <string name="dashboard_text">Dashboard</string>
     <string name="grades_text">Grades</string>
     <string name="attendance_text">Attendance</string>
     <string name="lessonplan_text">Lesson Plan</string>
     <string name="settings_text">Settings</string>
+
     <string name="noInternet_text">No internet connection</string>
     <string name="root_failed_text">This device is rooted. Automatic login has been disabled</string>
     <string name="encrypt_failed_text">Encryption failed. Automatic login has been disabled</string>
-    <string name="version_text">Version\u0020</string>
+    <string name="version_text">Version %1$s</string>
+    <string name="refresh_error_text">An error occurred while refreshing the content.</string>
+
     <string name="dialog_description_text">Description</string>
     <string name="dialog_weight_text">Weight</string>
     <string name="noDescription_text">No description</string>
     <string name="dialog_teacher_text">Teacher</string>
     <string name="dialog_date_text">Date</string>
     <string name="dialog_color_text">Color</string>
-    <string name="color_black_text">Black</string>
-    <string name="color_red_text">Red</string>
-    <string name="color_blue_text">Blue</string>
-    <string name="color_green_text">Green</string>
-    <string name="noColor_text">No color</string>
     <string name="dialog_close">Close</string>
-    <string name="refresh_error_text">An error occurred while refreshing the content.</string>
+
     <string name="snackbar_no_grades">No new grades</string>
     <string name="snackbar_new_grade">Number of new grades: %1$d</string>
 

app/src/test/java/io/github/wulkanowy/dao/EntitiesCompareTest.java

@@ -46,16 +46,28 @@ public class EntitiesCompareTest extends EntitiesCompare {
     }
 
     @Test
-    public void testCompareNewGradePositive() {
+    public void testCompareNewGradeEmptyOldList() {
 
         newList.add(grade1);
 
         List<Grade> updatedList = EntitiesCompare.compareGradeList(newList, oldList);
 
-        Assert.assertEquals(true, (updatedList.get(0)).getIsNew());
+        Assert.assertFalse(updatedList.get(0).getIsNew());
 
     }
 
+    @Test
+    public void testCompareNewGradePositive() {
+        newList.add(grade1);
+        newList.add(grade2);
+        oldList.add(grade2);
+
+        List<Grade> updatedList = EntitiesCompare.compareGradeList(newList, oldList);
+
+        Assert.assertFalse(updatedList.get(0).getIsNew());
+        Assert.assertTrue(updatedList.get(1).getIsNew());
+    }
+
     @Test
     public void testCompareNewGradeNegative() {
 
@@ -66,8 +78,8 @@ public class EntitiesCompareTest extends EntitiesCompare {
 
         List<Grade> updatedList = EntitiesCompare.compareGradeList(newList, oldList);
 
-        Assert.assertEquals(false, (updatedList.get(0)).getIsNew());
+        Assert.assertFalse(updatedList.get(0).getIsNew());
-        Assert.assertEquals(false, (updatedList.get(1)).getIsNew());
+        Assert.assertFalse(updatedList.get(1).getIsNew());
     }
 
     @Test
@@ -77,4 +89,18 @@ public class EntitiesCompareTest extends EntitiesCompare {
 
         Assert.assertEquals(new ArrayList<>(), updatedList);
     }
+
+    @Test
+    public void testCompareReadGradeTest() {
+        newList.add(grade1);
+        newList.add(grade2);
+        oldList.add(grade2.setRead(true));
+
+        List<Grade> updatedList = EntitiesCompare.compareGradeList(newList, oldList);
+
+        Assert.assertTrue(updatedList.get(0).getRead());
+        Assert.assertFalse(updatedList.get(0).getIsNew());
+        Assert.assertFalse(updatedList.get(1).getRead());
+        Assert.assertTrue(updatedList.get(1).getIsNew());
+    }
 }