diff --git a/app/build.gradle b/app/build.gradle
index e97410d..8011b02 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,14 +1,14 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 27
+    compileSdkVersion 28
     defaultConfig {
         applicationId "com.ulan.timetable"
         minSdkVersion 21
-        targetSdkVersion 27
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
         release {
@@ -16,20 +16,32 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+    compileOptions {
+        sourceCompatibility = 1.8
+        targetCompatibility = 1.8
+    }
 }
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation 'com.android.support:appcompat-v7:27.1.1'
-    implementation 'com.android.support:support-v4:27.1.1'
-    implementation 'com.android.support:design:27.1.1'
-    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
-    implementation 'com.android.support:customtabs:27.1.1'
-    implementation 'com.android.support:preference-v7:27.1.1'
-    implementation 'com.android.support:cardview-v7:27.1.1'
-    implementation 'petrov.kristiyan:colorpicker-library:1.1.8'
-    implementation 'org.xdty.preference:color-picker:0.0.5'
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
+    implementation 'com.google.android.material:material:1.0.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'androidx.browser:browser:1.2.0'
+    implementation 'androidx.preference:preference:1.1.0'
+    implementation 'androidx.cardview:cardview:1.0.0'
+    implementation 'petrov.kristiyan:colorpicker-library:1.1.10'
+    implementation 'com.firebaseui:firebase-ui-auth:4.3.1'
+    implementation 'com.google.firebase:firebase-analytics:17.2.1'
+    implementation 'com.google.firebase:firebase-core:17.2.1'
+    // Required only if Facebook login support is required
+    // Find the latest Facebook SDK releases here: https://goo.gl/Ce5L94
+    implementation 'com.facebook.android:facebook-android-sdk:4.29.0'
+    implementation "androidx.coordinatorlayout:coordinatorlayout:1.1.0"
+    implementation "com.google.firebase:firebase-auth:19.2.0"
     testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'com.android.support.test:runner:1.0.2'
-    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
 }
+apply plugin: 'com.google.gms.google-services'
\ No newline at end of file
diff --git a/app/google-services.json b/app/google-services.json
new file mode 100644
index 0000000..493aad2
--- /dev/null
+++ b/app/google-services.json
@@ -0,0 +1,40 @@
+{
+  "project_info": {
+    "project_number": "436077303281",
+    "firebase_url": "https://timetable-e6129.firebaseio.com",
+    "project_id": "timetable-e6129",
+    "storage_bucket": "timetable-e6129.appspot.com"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:436077303281:android:844b815f9a9784aa586050",
+        "android_client_info": {
+          "package_name": "com.ulan.timetable"
+        }
+      },
+      "oauth_client": [
+        {
+          "client_id": "436077303281-eomhiu4gr9oi0iqtgcf7ft8eus6lqgsf.apps.googleusercontent.com",
+          "client_type": 3
+        }
+      ],
+      "api_key": [
+        {
+          "current_key": "AIzaSyChbM3TDXNtRL5YaoRtgzd5Ps1PFnh24zw"
+        }
+      ],
+      "services": {
+        "appinvite_service": {
+          "other_platform_oauth_client": [
+            {
+              "client_id": "436077303281-eomhiu4gr9oi0iqtgcf7ft8eus6lqgsf.apps.googleusercontent.com",
+              "client_type": 3
+            }
+          ]
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/ulan/timetable/activities/ExamsActivity.java b/app/src/main/java/com/ulan/timetable/activities/ExamsActivity.java
index c3af4be..4b549e9 100644
--- a/app/src/main/java/com/ulan/timetable/activities/ExamsActivity.java
+++ b/app/src/main/java/com/ulan/timetable/activities/ExamsActivity.java
@@ -1,7 +1,6 @@
 package com.ulan.timetable.activities;
 
 import android.content.Context;
-import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.util.SparseBooleanArray;
 import android.view.ActionMode;
@@ -12,6 +11,8 @@
 import android.widget.AbsListView;
 import android.widget.ListView;
 
+import androidx.appcompat.app.AppCompatActivity;
+
 import com.ulan.timetable.adapters.ExamsAdapter;
 import com.ulan.timetable.model.Exam;
 import com.ulan.timetable.R;
diff --git a/app/src/main/java/com/ulan/timetable/activities/HomeworksActivity.java b/app/src/main/java/com/ulan/timetable/activities/HomeworksActivity.java
index 10f607e..fbf8e5a 100644
--- a/app/src/main/java/com/ulan/timetable/activities/HomeworksActivity.java
+++ b/app/src/main/java/com/ulan/timetable/activities/HomeworksActivity.java
@@ -2,7 +2,6 @@
 
 import android.content.Context;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
 import android.util.SparseBooleanArray;
 import android.view.ActionMode;
 import android.view.Menu;
@@ -12,6 +11,8 @@
 import android.widget.AbsListView;
 import android.widget.ListView;
 
+import androidx.appcompat.app.AppCompatActivity;
+
 import com.ulan.timetable.adapters.HomeworksAdapter;
 import com.ulan.timetable.model.Homework;
 import com.ulan.timetable.R;
diff --git a/app/src/main/java/com/ulan/timetable/activities/MainActivity.java b/app/src/main/java/com/ulan/timetable/activities/MainActivity.java
index 20882ad..728723a 100644
--- a/app/src/main/java/com/ulan/timetable/activities/MainActivity.java
+++ b/app/src/main/java/com/ulan/timetable/activities/MainActivity.java
@@ -5,23 +5,24 @@
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
-import android.support.design.widget.Snackbar;
-import android.support.design.widget.TabLayout;
-import android.support.v4.view.ViewPager;
-import android.support.v7.preference.PreferenceManager;
 import android.text.TextUtils;
-import android.view.View;
-import android.support.design.widget.NavigationView;
-import android.support.v4.view.GravityCompat;
-import android.support.v4.widget.DrawerLayout;
-import android.support.v7.app.ActionBarDrawerToggle;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
 
-
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.ActionBarDrawerToggle;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+import androidx.core.view.GravityCompat;
+import androidx.drawerlayout.widget.DrawerLayout;
+import androidx.preference.PreferenceManager;
+import androidx.viewpager.widget.ViewPager;
+
+import com.google.android.material.navigation.NavigationView;
+import com.google.android.material.snackbar.Snackbar;
+import com.google.android.material.tabs.TabLayout;
+import com.ulan.timetable.R;
 import com.ulan.timetable.adapters.FragmentsTabAdapter;
 import com.ulan.timetable.fragments.FridayFragment;
 import com.ulan.timetable.fragments.MondayFragment;
@@ -30,7 +31,6 @@
 import com.ulan.timetable.fragments.ThursdayFragment;
 import com.ulan.timetable.fragments.TuesdayFragment;
 import com.ulan.timetable.fragments.WednesdayFragment;
-import com.ulan.timetable.R;
 import com.ulan.timetable.utils.AlertDialogsHelper;
 import com.ulan.timetable.utils.DailyReceiver;
 
@@ -69,7 +69,7 @@ private void initAll() {
         setupCustomDialog();
         setupSevenDaysPref();
 
-        if(switchSevenDays) changeFragments(true);
+        if (switchSevenDays) changeFragments(true);
 
         setDailyAlarm();
     }
@@ -86,29 +86,29 @@ private void setupFragments() {
         adapter.addFragment(new ThursdayFragment(), getResources().getString(R.string.thursday));
         adapter.addFragment(new FridayFragment(), getResources().getString(R.string.friday));
         viewPager.setAdapter(adapter);
-        viewPager.setCurrentItem(day == 1 ? 6 : day-2, true);
+        viewPager.setCurrentItem(day == 1 ? 6 : day - 2, true);
         tabLayout.setupWithViewPager(viewPager);
     }
 
     private void changeFragments(boolean isChecked) {
-        if(isChecked) {
+        if (isChecked) {
             TabLayout tabLayout = findViewById(R.id.tabLayout);
             Calendar calendar = Calendar.getInstance();
             int day = calendar.get(Calendar.DAY_OF_WEEK);
             adapter.addFragment(new SaturdayFragment(), getResources().getString(R.string.saturday));
             adapter.addFragment(new SundayFragment(), getResources().getString(R.string.sunday));
             viewPager.setAdapter(adapter);
-            viewPager.setCurrentItem(day == 1 ? 6 : day-2, true);
+            viewPager.setCurrentItem(day == 1 ? 6 : day - 2, true);
             tabLayout.setupWithViewPager(viewPager);
         } else {
-            if(adapter.getFragmentList().size() > 5) {
+            if (adapter.getFragmentList().size() > 5) {
                 adapter.removeFragment(new SaturdayFragment(), 5);
                 adapter.removeFragment(new SundayFragment(), 5);
             }
         }
         adapter.notifyDataSetChanged();
     }
-    
+
     private void setupCustomDialog() {
         final View alertLayout = getLayoutInflater().inflate(R.layout.dialog_add_subject, null);
         AlertDialogsHelper.getAddSubjectDialog(MainActivity.this, alertLayout, adapter, viewPager);
@@ -143,6 +143,7 @@ private void setDailyAlarm() {
         }
 
     }
+
     @Override
     public void onBackPressed() {
         DrawerLayout drawer = findViewById(R.id.drawer_layout);
@@ -177,7 +178,7 @@ public boolean onNavigationItemSelected(@NonNull MenuItem item) {
         switch (item.getItemId()) {
             case R.id.schoolwebsitemenu:
                 String schoolWebsite = PreferenceManager.getDefaultSharedPreferences(this).getString(SettingsActivity.KEY_SCHOOL_WEBSITE_SETTING, null);
-                if(!TextUtils.isEmpty(schoolWebsite)) {
+                if (!TextUtils.isEmpty(schoolWebsite)) {
                     openUrlInChromeCustomTab(getApplicationContext(), schoolWebsite);
                 } else {
                     Snackbar.make(navigationView, R.string.school_website_snackbar, Snackbar.LENGTH_SHORT).show();
diff --git a/app/src/main/java/com/ulan/timetable/activities/NoteInfoActivity.java b/app/src/main/java/com/ulan/timetable/activities/NoteInfoActivity.java
index cc2091c..94a70f9 100644
--- a/app/src/main/java/com/ulan/timetable/activities/NoteInfoActivity.java
+++ b/app/src/main/java/com/ulan/timetable/activities/NoteInfoActivity.java
@@ -1,11 +1,12 @@
 package com.ulan.timetable.activities;
 
-import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.view.MenuItem;
 import android.widget.EditText;
 import android.widget.Toast;
 
+import androidx.appcompat.app.AppCompatActivity;
+
 import com.ulan.timetable.model.Note;
 import com.ulan.timetable.R;
 import com.ulan.timetable.utils.DbHelper;
diff --git a/app/src/main/java/com/ulan/timetable/activities/NotesActivity.java b/app/src/main/java/com/ulan/timetable/activities/NotesActivity.java
index 2f015a1..83eeaf1 100644
--- a/app/src/main/java/com/ulan/timetable/activities/NotesActivity.java
+++ b/app/src/main/java/com/ulan/timetable/activities/NotesActivity.java
@@ -2,7 +2,6 @@
 
 import android.content.Context;
 import android.content.Intent;
-import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.util.SparseBooleanArray;
 import android.view.ActionMode;
@@ -14,6 +13,8 @@
 import android.widget.AdapterView;
 import android.widget.ListView;
 
+import androidx.appcompat.app.AppCompatActivity;
+
 import com.ulan.timetable.adapters.NotesAdapter;
 import com.ulan.timetable.model.Note;
 import com.ulan.timetable.R;
diff --git a/app/src/main/java/com/ulan/timetable/activities/SettingsActivity.java b/app/src/main/java/com/ulan/timetable/activities/SettingsActivity.java
index 4311a65..6650ba6 100644
--- a/app/src/main/java/com/ulan/timetable/activities/SettingsActivity.java
+++ b/app/src/main/java/com/ulan/timetable/activities/SettingsActivity.java
@@ -1,8 +1,6 @@
 package com.ulan.timetable.activities;
-
-import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
-
+import androidx.appcompat.app.AppCompatActivity;
 import com.ulan.timetable.fragments.SettingsFragment;
 import com.ulan.timetable.R;
 
diff --git a/app/src/main/java/com/ulan/timetable/activities/TeachersActivity.java b/app/src/main/java/com/ulan/timetable/activities/TeachersActivity.java
index 00fe339..142d79a 100644
--- a/app/src/main/java/com/ulan/timetable/activities/TeachersActivity.java
+++ b/app/src/main/java/com/ulan/timetable/activities/TeachersActivity.java
@@ -1,8 +1,6 @@
 package com.ulan.timetable.activities;
 
 import android.content.Context;
-import android.support.design.widget.CoordinatorLayout;
-import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.util.SparseBooleanArray;
 import android.view.ActionMode;
@@ -13,6 +11,9 @@
 import android.widget.AbsListView;
 import android.widget.ListView;
 
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
+
 import com.ulan.timetable.adapters.TeachersAdapter;
 import com.ulan.timetable.model.Teacher;
 import com.ulan.timetable.R;
diff --git a/app/src/main/java/com/ulan/timetable/adapters/ExamsAdapter.java b/app/src/main/java/com/ulan/timetable/adapters/ExamsAdapter.java
index 5377fe8..2fe999e 100644
--- a/app/src/main/java/com/ulan/timetable/adapters/ExamsAdapter.java
+++ b/app/src/main/java/com/ulan/timetable/adapters/ExamsAdapter.java
@@ -1,9 +1,8 @@
 package com.ulan.timetable.adapters;
 
 import android.app.Activity;
-import android.support.annotation.NonNull;
-import android.support.v7.widget.CardView;
-import android.support.v7.widget.PopupMenu;
+
+
 import android.util.SparseBooleanArray;
 import android.view.LayoutInflater;
 import android.view.MenuItem;
@@ -14,6 +13,10 @@
 import android.widget.ListView;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
+import androidx.appcompat.widget.PopupMenu;
+import androidx.cardview.widget.CardView;
+
 import com.ulan.timetable.model.Exam;
 import com.ulan.timetable.R;
 import com.ulan.timetable.utils.AlertDialogsHelper;
diff --git a/app/src/main/java/com/ulan/timetable/adapters/FragmentsTabAdapter.java b/app/src/main/java/com/ulan/timetable/adapters/FragmentsTabAdapter.java
index b6c9cb1..a2c592e 100644
--- a/app/src/main/java/com/ulan/timetable/adapters/FragmentsTabAdapter.java
+++ b/app/src/main/java/com/ulan/timetable/adapters/FragmentsTabAdapter.java
@@ -1,10 +1,9 @@
 package com.ulan.timetable.adapters;
-
-import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
-import android.support.v4.app.Fragment;
-import android.support.v4.app.FragmentManager;
-import android.support.v4.app.FragmentStatePagerAdapter;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+import androidx.fragment.app.FragmentStatePagerAdapter;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/app/src/main/java/com/ulan/timetable/adapters/HomeworksAdapter.java b/app/src/main/java/com/ulan/timetable/adapters/HomeworksAdapter.java
index ed87530..47c6090 100644
--- a/app/src/main/java/com/ulan/timetable/adapters/HomeworksAdapter.java
+++ b/app/src/main/java/com/ulan/timetable/adapters/HomeworksAdapter.java
@@ -1,9 +1,8 @@
 package com.ulan.timetable.adapters;
 
 import android.app.Activity;
-import android.support.annotation.NonNull;
-import android.support.v7.widget.CardView;
-import android.support.v7.widget.PopupMenu;
+
+
 import android.util.SparseBooleanArray;
 import android.view.LayoutInflater;
 import android.view.MenuItem;
@@ -14,6 +13,10 @@
 import android.widget.ListView;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
+import androidx.appcompat.widget.PopupMenu;
+import androidx.cardview.widget.CardView;
+
 import com.ulan.timetable.model.Homework;
 import com.ulan.timetable.R;
 import com.ulan.timetable.utils.AlertDialogsHelper;
diff --git a/app/src/main/java/com/ulan/timetable/adapters/NotesAdapter.java b/app/src/main/java/com/ulan/timetable/adapters/NotesAdapter.java
index b773b59..c147ff2 100644
--- a/app/src/main/java/com/ulan/timetable/adapters/NotesAdapter.java
+++ b/app/src/main/java/com/ulan/timetable/adapters/NotesAdapter.java
@@ -1,10 +1,6 @@
 package com.ulan.timetable.adapters;
 
 import android.app.Activity;
-import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
-import android.support.v7.widget.CardView;
-import android.support.v7.widget.PopupMenu;
 import android.util.SparseBooleanArray;
 import android.view.LayoutInflater;
 import android.view.MenuItem;
@@ -15,6 +11,11 @@
 import android.widget.ListView;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.appcompat.widget.PopupMenu;
+import androidx.cardview.widget.CardView;
+
 import com.ulan.timetable.model.Note;
 import com.ulan.timetable.R;
 import com.ulan.timetable.utils.AlertDialogsHelper;
diff --git a/app/src/main/java/com/ulan/timetable/adapters/TeachersAdapter.java b/app/src/main/java/com/ulan/timetable/adapters/TeachersAdapter.java
index d2df716..7910ad7 100644
--- a/app/src/main/java/com/ulan/timetable/adapters/TeachersAdapter.java
+++ b/app/src/main/java/com/ulan/timetable/adapters/TeachersAdapter.java
@@ -1,9 +1,8 @@
 package com.ulan.timetable.adapters;
 
 import android.app.Activity;
-import android.support.annotation.NonNull;
-import android.support.v7.widget.CardView;
-import android.support.v7.widget.PopupMenu;
+
+
 import android.util.SparseBooleanArray;
 import android.view.LayoutInflater;
 import android.view.MenuItem;
@@ -14,6 +13,10 @@
 import android.widget.ListView;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
+import androidx.appcompat.widget.PopupMenu;
+import androidx.cardview.widget.CardView;
+
 import com.ulan.timetable.model.Teacher;
 import com.ulan.timetable.R;
 import com.ulan.timetable.utils.AlertDialogsHelper;
diff --git a/app/src/main/java/com/ulan/timetable/adapters/WeekAdapter.java b/app/src/main/java/com/ulan/timetable/adapters/WeekAdapter.java
index 172d99b..59be4e7 100644
--- a/app/src/main/java/com/ulan/timetable/adapters/WeekAdapter.java
+++ b/app/src/main/java/com/ulan/timetable/adapters/WeekAdapter.java
@@ -2,9 +2,8 @@
 
 import android.annotation.SuppressLint;
 import android.app.Activity;
-import android.support.annotation.NonNull;
-import android.support.v7.widget.CardView;
-import android.support.v7.widget.PopupMenu;
+
+
 import android.util.SparseBooleanArray;
 import android.view.LayoutInflater;
 import android.view.MenuItem;
@@ -15,6 +14,10 @@
 import android.widget.ListView;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
+import androidx.appcompat.widget.PopupMenu;
+import androidx.cardview.widget.CardView;
+
 import com.ulan.timetable.R;
 import com.ulan.timetable.model.Week;
 import com.ulan.timetable.utils.AlertDialogsHelper;
diff --git a/app/src/main/java/com/ulan/timetable/fragments/FridayFragment.java b/app/src/main/java/com/ulan/timetable/fragments/FridayFragment.java
index 2b83982..e05ca13 100644
--- a/app/src/main/java/com/ulan/timetable/fragments/FridayFragment.java
+++ b/app/src/main/java/com/ulan/timetable/fragments/FridayFragment.java
@@ -1,7 +1,8 @@
 package com.ulan.timetable.fragments;
 
 import android.os.Bundle;
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
+
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
diff --git a/app/src/main/java/com/ulan/timetable/fragments/MondayFragment.java b/app/src/main/java/com/ulan/timetable/fragments/MondayFragment.java
index 904cabc..ddf03d9 100644
--- a/app/src/main/java/com/ulan/timetable/fragments/MondayFragment.java
+++ b/app/src/main/java/com/ulan/timetable/fragments/MondayFragment.java
@@ -1,16 +1,17 @@
 package com.ulan.timetable.fragments;
 
 import android.os.Bundle;
-import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageView;
 import android.widget.ListView;
 
+import androidx.fragment.app.Fragment;
+
+import com.ulan.timetable.R;
 import com.ulan.timetable.adapters.WeekAdapter;
 import com.ulan.timetable.utils.DbHelper;
-import com.ulan.timetable.R;
 import com.ulan.timetable.utils.FragmentHelper;
 
 
diff --git a/app/src/main/java/com/ulan/timetable/fragments/SaturdayFragment.java b/app/src/main/java/com/ulan/timetable/fragments/SaturdayFragment.java
index cea5705..e88e73b 100644
--- a/app/src/main/java/com/ulan/timetable/fragments/SaturdayFragment.java
+++ b/app/src/main/java/com/ulan/timetable/fragments/SaturdayFragment.java
@@ -1,7 +1,8 @@
 package com.ulan.timetable.fragments;
 
 import android.os.Bundle;
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
+
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
diff --git a/app/src/main/java/com/ulan/timetable/fragments/SettingsFragment.java b/app/src/main/java/com/ulan/timetable/fragments/SettingsFragment.java
index c832a58..295079f 100644
--- a/app/src/main/java/com/ulan/timetable/fragments/SettingsFragment.java
+++ b/app/src/main/java/com/ulan/timetable/fragments/SettingsFragment.java
@@ -1,7 +1,7 @@
 package com.ulan.timetable.fragments;
 
 import android.os.Bundle;
-import android.support.v7.preference.PreferenceFragmentCompat;
+import androidx.preference.PreferenceFragmentCompat;
 
 import com.ulan.timetable.R;
 
diff --git a/app/src/main/java/com/ulan/timetable/fragments/SundayFragment.java b/app/src/main/java/com/ulan/timetable/fragments/SundayFragment.java
index ea81373..1d5b216 100644
--- a/app/src/main/java/com/ulan/timetable/fragments/SundayFragment.java
+++ b/app/src/main/java/com/ulan/timetable/fragments/SundayFragment.java
@@ -1,6 +1,7 @@
 package com.ulan.timetable.fragments;
 
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
+
 import android.os.Bundle;;
 import android.view.LayoutInflater;
 import android.view.View;
diff --git a/app/src/main/java/com/ulan/timetable/fragments/ThursdayFragment.java b/app/src/main/java/com/ulan/timetable/fragments/ThursdayFragment.java
index eac9f0f..52271cc 100644
--- a/app/src/main/java/com/ulan/timetable/fragments/ThursdayFragment.java
+++ b/app/src/main/java/com/ulan/timetable/fragments/ThursdayFragment.java
@@ -1,7 +1,8 @@
 package com.ulan.timetable.fragments;
 
 import android.os.Bundle;
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
+
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
diff --git a/app/src/main/java/com/ulan/timetable/fragments/TuesdayFragment.java b/app/src/main/java/com/ulan/timetable/fragments/TuesdayFragment.java
index a2aa9a0..dfee8d7 100644
--- a/app/src/main/java/com/ulan/timetable/fragments/TuesdayFragment.java
+++ b/app/src/main/java/com/ulan/timetable/fragments/TuesdayFragment.java
@@ -1,15 +1,16 @@
 package com.ulan.timetable.fragments;
 
 import android.os.Bundle;
-import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ListView;
 
+import androidx.fragment.app.Fragment;
+
+import com.ulan.timetable.R;
 import com.ulan.timetable.adapters.WeekAdapter;
 import com.ulan.timetable.utils.DbHelper;
-import com.ulan.timetable.R;
 import com.ulan.timetable.utils.FragmentHelper;
 
 public class TuesdayFragment extends Fragment {
diff --git a/app/src/main/java/com/ulan/timetable/fragments/WednesdayFragment.java b/app/src/main/java/com/ulan/timetable/fragments/WednesdayFragment.java
index ea084d4..8ea9fd7 100644
--- a/app/src/main/java/com/ulan/timetable/fragments/WednesdayFragment.java
+++ b/app/src/main/java/com/ulan/timetable/fragments/WednesdayFragment.java
@@ -1,15 +1,14 @@
 package com.ulan.timetable.fragments;
 
 import android.os.Bundle;
-import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ListView;
-
+import androidx.fragment.app.Fragment;
+import com.ulan.timetable.R;
 import com.ulan.timetable.adapters.WeekAdapter;
 import com.ulan.timetable.utils.DbHelper;
-import com.ulan.timetable.R;
 import com.ulan.timetable.utils.FragmentHelper;
 
 
diff --git a/app/src/main/java/com/ulan/timetable/utils/AlertDialogsHelper.java b/app/src/main/java/com/ulan/timetable/utils/AlertDialogsHelper.java
index 240caf4..9c279b2 100644
--- a/app/src/main/java/com/ulan/timetable/utils/AlertDialogsHelper.java
+++ b/app/src/main/java/com/ulan/timetable/utils/AlertDialogsHelper.java
@@ -5,11 +5,11 @@
 import android.app.TimePickerDialog;
 import android.graphics.Color;
 import android.graphics.drawable.ColorDrawable;
-import android.support.design.widget.FloatingActionButton;
-import android.support.design.widget.Snackbar;
-import android.support.v4.content.ContextCompat;
-import android.support.v4.view.ViewPager;
-import android.support.v7.app.AlertDialog;
+
+import androidx.appcompat.app.AlertDialog;
+import androidx.core.content.ContextCompat;
+import androidx.viewpager.widget.ViewPager;
+
 import android.text.TextUtils;
 import android.view.View;
 import android.widget.Button;
@@ -19,6 +19,8 @@
 import android.widget.TextView;
 import android.widget.TimePicker;
 
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.snackbar.Snackbar;
 import com.ulan.timetable.adapters.ExamsAdapter;
 import com.ulan.timetable.adapters.FragmentsTabAdapter;
 import com.ulan.timetable.adapters.HomeworksAdapter;
@@ -31,10 +33,6 @@
 import com.ulan.timetable.model.Teacher;
 import com.ulan.timetable.model.Week;
 import com.ulan.timetable.R;
-
-import org.xdty.preference.colorpicker.ColorPickerDialog;
-import org.xdty.preference.colorpicker.ColorPickerSwatch;
-
 import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.HashMap;
@@ -42,6 +40,8 @@
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import petrov.kristiyan.colorpicker.ColorPicker;
+
 
 /**
  * Created by Ulan on 22.10.2018.
@@ -118,21 +118,19 @@ public void onClick(View v) {
                 int mSelectedColor = ContextCompat.getColor(activity, R.color.white);
                 select_color.setBackgroundColor(mSelectedColor);
                 int[] mColors = activity.getResources().getIntArray(R.array.default_colors);
-                ColorPickerDialog dialog = ColorPickerDialog.newInstance(R.string.color_picker_default_title,
-                        mColors,
-                        mSelectedColor,
-                        5,
-                        ColorPickerDialog.SIZE_SMALL,
-                        true
-                );
-
-                dialog.setOnColorSelectedListener(new ColorPickerSwatch.OnColorSelectedListener() {
+
+                ColorPicker colorPicker = new ColorPicker(activity);
+                colorPicker.show();
+                colorPicker.setOnChooseColorListener(new ColorPicker.OnChooseColorListener() {
+                    @Override
+                    public void onChooseColor(int position,int color) {
+                        select_color.setBackgroundColor(color);                    }
+
                     @Override
-                    public void onColorSelected(int color) {
-                        select_color.setBackgroundColor(color);
+                    public void onCancel(){
+                        // put code
                     }
                 });
-                dialog.show(activity.getFragmentManager(), "color_dialog");
             }
         });
 
@@ -239,21 +237,20 @@ public void onClick(View v) {
                 int mSelectedColor = ContextCompat.getColor(activity, R.color.white);
                 select_color.setBackgroundColor(mSelectedColor);
                 int[] mColors = activity.getResources().getIntArray(R.array.default_colors);
-                ColorPickerDialog dialog = ColorPickerDialog.newInstance(R.string.color_picker_default_title,
-                        mColors,
-                        mSelectedColor,
-                        5,
-                        ColorPickerDialog.SIZE_SMALL,
-                        true
-                );
-
-                dialog.setOnColorSelectedListener(new ColorPickerSwatch.OnColorSelectedListener() {
+
+                ColorPicker colorPicker = new ColorPicker(activity);
+                colorPicker.show();
+                colorPicker.setOnChooseColorListener(new ColorPicker.OnChooseColorListener() {
+                    @Override
+                    public void onChooseColor(int position,int color) {
+                        select_color.setBackgroundColor(color);                    }
+
                     @Override
-                    public void onColorSelected(int color) {
-                        select_color.setBackgroundColor(color);
+                    public void onCancel(){
+                        // put code
                     }
                 });
-                dialog.show(activity.getFragmentManager(), "color_dialog");
+
             }
         });
 
@@ -355,21 +352,18 @@ public void onClick(View v) {
                 int mSelectedColor = ContextCompat.getColor(activity, R.color.white);
                 select_color.setBackgroundColor(mSelectedColor);
                 int[] mColors = activity.getResources().getIntArray(R.array.default_colors);
-                ColorPickerDialog dialog = ColorPickerDialog.newInstance(R.string.color_picker_default_title,
-                        mColors,
-                        mSelectedColor,
-                        5,
-                        ColorPickerDialog.SIZE_SMALL,
-                        true
-                );
-
-                dialog.setOnColorSelectedListener(new ColorPickerSwatch.OnColorSelectedListener() {
+                ColorPicker colorPicker = new ColorPicker(activity);
+                colorPicker.show();
+                colorPicker.setOnChooseColorListener(new ColorPicker.OnChooseColorListener() {
                     @Override
-                    public void onColorSelected(int color) {
-                        select_color.setBackgroundColor(color);
+                    public void onChooseColor(int position,int color) {
+                        select_color.setBackgroundColor(color);                    }
+
+                    @Override
+                    public void onCancel(){
+                        // put code
                     }
                 });
-                dialog.show(activity.getFragmentManager(), "color_dialog");
             }
         });
 
@@ -451,21 +445,18 @@ public void onClick(View v) {
                 int mSelectedColor = ContextCompat.getColor(activity, R.color.white);
                 select_color.setBackgroundColor(mSelectedColor);
                 int[] mColors = activity.getResources().getIntArray(R.array.default_colors);
-                ColorPickerDialog dialog = ColorPickerDialog.newInstance(R.string.color_picker_default_title,
-                        mColors,
-                        mSelectedColor,
-                        5,
-                        ColorPickerDialog.SIZE_SMALL,
-                        true
-                );
-
-                dialog.setOnColorSelectedListener(new ColorPickerSwatch.OnColorSelectedListener() {
+                ColorPicker colorPicker = new ColorPicker(activity);
+                colorPicker.show();
+                colorPicker.setOnChooseColorListener(new ColorPicker.OnChooseColorListener() {
+                    @Override
+                    public void onChooseColor(int position,int color) {
+                        select_color.setBackgroundColor(color);                    }
+
                     @Override
-                    public void onColorSelected(int color) {
-                        select_color.setBackgroundColor(color);
+                    public void onCancel(){
+                        // put code
                     }
                 });
-                dialog.show(activity.getFragmentManager(), "color_dialog");
             }
         });
 
@@ -551,21 +542,18 @@ public void onClick(View v) {
                 int mSelectedColor = ContextCompat.getColor(activity, R.color.white);
                 select_color.setBackgroundColor(mSelectedColor);
                 int[] mColors = activity.getResources().getIntArray(R.array.default_colors);
-                ColorPickerDialog dialog = ColorPickerDialog.newInstance(R.string.color_picker_default_title,
-                        mColors,
-                        mSelectedColor,
-                        5,
-                        ColorPickerDialog.SIZE_SMALL,
-                        true
-                );
-
-                dialog.setOnColorSelectedListener(new ColorPickerSwatch.OnColorSelectedListener() {
+                ColorPicker colorPicker = new ColorPicker(activity);
+                colorPicker.show();
+                colorPicker.setOnChooseColorListener(new ColorPicker.OnChooseColorListener() {
+                    @Override
+                    public void onChooseColor(int position,int color) {
+                        select_color.setBackgroundColor(color);                    }
+
                     @Override
-                    public void onColorSelected(int color) {
-                        select_color.setBackgroundColor(color);
+                    public void onCancel(){
+                        // put code
                     }
                 });
-                dialog.show(activity.getFragmentManager(), "color_dialog");
             }
         });
 
@@ -631,21 +619,18 @@ public void onClick(View v) {
                 int mSelectedColor = ContextCompat.getColor(activity, R.color.white);
                 select_color.setBackgroundColor(mSelectedColor);
                 int[] mColors = activity.getResources().getIntArray(R.array.default_colors);
-                ColorPickerDialog dialog = ColorPickerDialog.newInstance(R.string.color_picker_default_title,
-                        mColors,
-                        mSelectedColor,
-                        5,
-                        ColorPickerDialog.SIZE_SMALL,
-                        true
-                );
-
-                dialog.setOnColorSelectedListener(new ColorPickerSwatch.OnColorSelectedListener() {
+                ColorPicker colorPicker = new ColorPicker(activity);
+                colorPicker.show();
+                colorPicker.setOnChooseColorListener(new ColorPicker.OnChooseColorListener() {
+                    @Override
+                    public void onChooseColor(int position,int color) {
+                        select_color.setBackgroundColor(color);                    }
+
                     @Override
-                    public void onColorSelected(int color) {
-                        select_color.setBackgroundColor(color);
+                    public void onCancel(){
+                        // put code
                     }
                 });
-                dialog.show(activity.getFragmentManager(), "color_dialog");
             }
         });
 
@@ -720,21 +705,18 @@ public void onClick(View v) {
                 int mSelectedColor = ContextCompat.getColor(activity, R.color.white);
                 select_color.setBackgroundColor(mSelectedColor);
                 int[] mColors = activity.getResources().getIntArray(R.array.default_colors);
-                ColorPickerDialog dialog = ColorPickerDialog.newInstance(R.string.color_picker_default_title,
-                        mColors,
-                        mSelectedColor,
-                        5,
-                        ColorPickerDialog.SIZE_SMALL,
-                        true
-                );
-
-                dialog.setOnColorSelectedListener(new ColorPickerSwatch.OnColorSelectedListener() {
+                ColorPicker colorPicker = new ColorPicker(activity);
+                colorPicker.show();
+                colorPicker.setOnChooseColorListener(new ColorPicker.OnChooseColorListener() {
+                    @Override
+                    public void onChooseColor(int position,int color) {
+                        select_color.setBackgroundColor(color);                    }
+
                     @Override
-                    public void onColorSelected(int color) {
-                        select_color.setBackgroundColor(color);
+                    public void onCancel(){
+                        // put code
                     }
                 });
-                dialog.show(activity.getFragmentManager(), "color_dialog");
             }
         });
 
@@ -786,21 +768,18 @@ public void onClick(View v) {
                 int mSelectedColor = ContextCompat.getColor(activity, R.color.white);
                 select_color.setBackgroundColor(mSelectedColor);
                 int[] mColors = activity.getResources().getIntArray(R.array.default_colors);
-                ColorPickerDialog dialog = ColorPickerDialog.newInstance(R.string.color_picker_default_title,
-                        mColors,
-                        mSelectedColor,
-                        5,
-                        ColorPickerDialog.SIZE_SMALL,
-                        true
-                );
-
-                dialog.setOnColorSelectedListener(new ColorPickerSwatch.OnColorSelectedListener() {
+                ColorPicker colorPicker = new ColorPicker(activity);
+                colorPicker.show();
+                colorPicker.setOnChooseColorListener(new ColorPicker.OnChooseColorListener() {
                     @Override
-                    public void onColorSelected(int color) {
-                        select_color.setBackgroundColor(color);
+                    public void onChooseColor(int position,int color) {
+                        select_color.setBackgroundColor(color);                    }
+
+                    @Override
+                    public void onCancel(){
+                        // put code
                     }
                 });
-                dialog.show(activity.getFragmentManager(), "color_dialog");
             }
         });
 
@@ -918,21 +897,19 @@ public void onClick(View v) {
                 int mSelectedColor = ContextCompat.getColor(activity, R.color.white);
                 select_color.setBackgroundColor(mSelectedColor);
                 int[] mColors = activity.getResources().getIntArray(R.array.default_colors);
-                ColorPickerDialog dialog = ColorPickerDialog.newInstance(R.string.color_picker_default_title,
-                        mColors,
-                        mSelectedColor,
-                        5,
-                        ColorPickerDialog.SIZE_SMALL,
-                        true
-                );
-
-                dialog.setOnColorSelectedListener(new ColorPickerSwatch.OnColorSelectedListener() {
+
+                ColorPicker colorPicker = new ColorPicker(activity);
+                colorPicker.show();
+                colorPicker.setOnChooseColorListener(new ColorPicker.OnChooseColorListener() {
+                    @Override
+                    public void onChooseColor(int position,int color) {
+                        select_color.setBackgroundColor(color);                    }
+
                     @Override
-                    public void onColorSelected(int color) {
-                        select_color.setBackgroundColor(color);
+                    public void onCancel(){
+                        // put code
                     }
                 });
-                dialog.show(activity.getFragmentManager(), "color_dialog");
             }
         });
 
@@ -1045,21 +1022,19 @@ public void onClick(View v) {
                 int mSelectedColor = ContextCompat.getColor(activity, R.color.white);
                 select_color.setBackgroundColor(mSelectedColor);
                 int[] mColors = activity.getResources().getIntArray(R.array.default_colors);
-                ColorPickerDialog dialog = ColorPickerDialog.newInstance(R.string.color_picker_default_title,
-                        mColors,
-                        mSelectedColor,
-                        5,
-                        ColorPickerDialog.SIZE_SMALL,
-                        true
-                );
-
-                dialog.setOnColorSelectedListener(new ColorPickerSwatch.OnColorSelectedListener() {
+
+                ColorPicker colorPicker = new ColorPicker(activity);
+                colorPicker.show();
+                colorPicker.setOnChooseColorListener(new ColorPicker.OnChooseColorListener() {
+                    @Override
+                    public void onChooseColor(int position,int color) {
+                        select_color.setBackgroundColor(color);                    }
+
                     @Override
-                    public void onColorSelected(int color) {
-                        select_color.setBackgroundColor(color);
+                    public void onCancel(){
+                        // put code
                     }
                 });
-                dialog.show(activity.getFragmentManager(), "color_dialog");
             }
         });
 
diff --git a/app/src/main/java/com/ulan/timetable/utils/BrowserUtil.java b/app/src/main/java/com/ulan/timetable/utils/BrowserUtil.java
index 75cb8f3..b24904b 100644
--- a/app/src/main/java/com/ulan/timetable/utils/BrowserUtil.java
+++ b/app/src/main/java/com/ulan/timetable/utils/BrowserUtil.java
@@ -4,7 +4,7 @@
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
-import android.support.customtabs.CustomTabsIntent;
+import androidx.browser.customtabs.CustomTabsIntent;
 
 /**
  * Created by Ulan on 19.10.2018.
diff --git a/app/src/main/java/com/ulan/timetable/utils/DailyReceiver.java b/app/src/main/java/com/ulan/timetable/utils/DailyReceiver.java
index 8fda250..84fac1e 100644
--- a/app/src/main/java/com/ulan/timetable/utils/DailyReceiver.java
+++ b/app/src/main/java/com/ulan/timetable/utils/DailyReceiver.java
@@ -9,8 +9,10 @@
 import android.media.RingtoneManager;
 import android.net.Uri;
 import android.os.Build;
-import android.support.annotation.RequiresApi;
-import android.support.v4.app.NotificationCompat;
+
+
+import androidx.annotation.RequiresApi;
+import androidx.core.app.NotificationCompat;
 
 import com.ulan.timetable.activities.MainActivity;
 import com.ulan.timetable.R;
@@ -70,10 +72,12 @@ private String getLessons(int day) {
 
         db.getWeek(currentDay).forEach(week -> {
             if(week != null) {
-                lessons.append(week.getSubject()).append(" ")
+                lessons.append(week.getSubject())
+                        .append(" ")
                         .append(week.getFromTime())
                         .append(" - ")
-                        .append(week.getToTime()).append(" ")
+                        .append(week.getToTime())
+                        .append(" ")
                         .append(week.getRoom())
                         .append("\n");
             }
diff --git a/app/src/main/res/layout/activity_exams.xml b/app/src/main/res/layout/activity_exams.xml
index cf1a6e6..d0a57ef 100644
--- a/app/src/main/res/layout/activity_exams.xml
+++ b/app/src/main/res/layout/activity_exams.xml
@@ -1,12 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context=".activities.ExamsActivity"
     android:orientation="vertical">
 
-    <android.support.constraint.ConstraintLayout
+    <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
@@ -18,9 +18,9 @@
             android:cacheColorHint="@android:color/transparent"
             android:divider="@null"
             />
-    </android.support.constraint.ConstraintLayout>
+    </androidx.constraintlayout.widget.ConstraintLayout>
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -28,4 +28,4 @@
         android:layout_margin="@dimen/fab_margin"
         android:src="@drawable/baseline_add_white_24" />
 
-</android.support.design.widget.CoordinatorLayout>
\ No newline at end of file
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_homeworks.xml b/app/src/main/res/layout/activity_homeworks.xml
index c0e54a9..d06aa6c 100644
--- a/app/src/main/res/layout/activity_homeworks.xml
+++ b/app/src/main/res/layout/activity_homeworks.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/coordinatorHomeworks"
@@ -8,7 +8,7 @@
     tools:context=".activities.HomeworksActivity"
     android:orientation="vertical">
 
-    <android.support.constraint.ConstraintLayout
+    <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
@@ -21,9 +21,9 @@
             android:cacheColorHint="@android:color/transparent"
             android:divider="@null"
             />
-    </android.support.constraint.ConstraintLayout>
+    </androidx.constraintlayout.widget.ConstraintLayout>
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -31,4 +31,4 @@
         android:layout_margin="@dimen/fab_margin"
         android:src="@drawable/baseline_add_white_24" />
 
-</android.support.design.widget.CoordinatorLayout>
\ No newline at end of file
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index d38e97d..204e5fb 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.drawerlayout.widget.DrawerLayout  xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/drawer_layout"
@@ -19,7 +19,7 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
 
-    <android.support.design.widget.NavigationView
+    <com.google.android.material.navigation.NavigationView
         android:id="@+id/nav_view"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
@@ -28,4 +28,4 @@
         app:headerLayout="@layout/nav_header_main"
         app:menu="@menu/activity_main_drawer" />
 
-</android.support.v4.widget.DrawerLayout>
+</androidx.drawerlayout.widget.DrawerLayout >
diff --git a/app/src/main/res/layout/activity_note_info.xml b/app/src/main/res/layout/activity_note_info.xml
index 854a054..2a16849 100644
--- a/app/src/main/res/layout/activity_note_info.xml
+++ b/app/src/main/res/layout/activity_note_info.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
@@ -13,4 +13,4 @@
         android:inputType="none"
         android:background="@null"
         />
-</android.support.design.widget.CoordinatorLayout>
\ No newline at end of file
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_notes.xml b/app/src/main/res/layout/activity_notes.xml
index 79f4613..3c64d49 100644
--- a/app/src/main/res/layout/activity_notes.xml
+++ b/app/src/main/res/layout/activity_notes.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/coordinatorNotes"
@@ -8,7 +8,7 @@
     tools:context=".activities.NotesActivity"
     android:orientation="vertical">
 
-    <android.support.constraint.ConstraintLayout
+    <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
@@ -20,9 +20,9 @@
             android:cacheColorHint="@android:color/transparent"
             android:divider="@null"
             />
-    </android.support.constraint.ConstraintLayout>
+    </androidx.constraintlayout.widget.ConstraintLayout>
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -30,4 +30,4 @@
         android:layout_margin="@dimen/fab_margin"
         android:src="@drawable/baseline_add_white_24" />
 
-</android.support.design.widget.CoordinatorLayout>
\ No newline at end of file
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_settings.xml b/app/src/main/res/layout/activity_settings.xml
index 4a4970a..adbc1aa 100644
--- a/app/src/main/res/layout/activity_settings.xml
+++ b/app/src/main/res/layout/activity_settings.xml
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context=".activities.SettingsActivity">
 
-</android.support.constraint.ConstraintLayout>
\ No newline at end of file
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_teachers.xml b/app/src/main/res/layout/activity_teachers.xml
index 81624f4..9aed8ca 100644
--- a/app/src/main/res/layout/activity_teachers.xml
+++ b/app/src/main/res/layout/activity_teachers.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/coordinatorTeachers"
@@ -23,7 +23,7 @@
             />
     </LinearLayout>
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -31,4 +31,4 @@
         android:layout_margin="@dimen/fab_margin"
         android:src="@drawable/baseline_add_white_24" />
 
-</android.support.design.widget.CoordinatorLayout>
\ No newline at end of file
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/app_bar_main.xml b/app/src/main/res/layout/app_bar_main.xml
index 64963df..8214c06 100644
--- a/app/src/main/res/layout/app_bar_main.xml
+++ b/app/src/main/res/layout/app_bar_main.xml
@@ -7,13 +7,13 @@
     tools:context=".activities.MainActivity"
     android:orientation="vertical">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/app_bar_layout"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:theme="@style/AppTheme.AppBarOverlay">
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
@@ -21,9 +21,9 @@
             app:popupTheme="@style/AppTheme.PopupOverlay"
             app:layout_scrollFlags="scroll|enterAlways"/>
 
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout >
 
-    <android.support.design.widget.TabLayout
+    <com.google.android.material.tabs.TabLayout
         android:id="@+id/tabLayout"
         android:theme="@style/AppTheme.AppBarOverlay"
         android:layout_width="match_parent"
@@ -42,7 +42,7 @@
         app:tabSelectedTextColor="#FFFFFF"
         >
 
-    </android.support.design.widget.TabLayout>
+    </com.google.android.material.tabs.TabLayout  >
 
 
     <include
diff --git a/app/src/main/res/layout/content_main.xml b/app/src/main/res/layout/content_main.xml
index 5bbcd88..c10963c 100644
--- a/app/src/main/res/layout/content_main.xml
+++ b/app/src/main/res/layout/content_main.xml
@@ -8,13 +8,13 @@
     tools:context=".activities.MainActivity"
     tools:showIn="@layout/app_bar_main">
 
-    <android.support.v4.view.ViewPager
+    <androidx.viewpager.widget.ViewPager
         android:id="@+id/viewPager"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
-    </android.support.v4.view.ViewPager>
+    </androidx.viewpager.widget.ViewPager>
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
diff --git a/app/src/main/res/layout/listview_exams_adapter.xml b/app/src/main/res/layout/listview_exams_adapter.xml
index 0a99aa3..c41c7fc 100644
--- a/app/src/main/res/layout/listview_exams_adapter.xml
+++ b/app/src/main/res/layout/listview_exams_adapter.xml
@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content" >
 
-    <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
+    <androidx.cardview.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
         android:id="@+id/exams_cardview"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -14,7 +14,7 @@
         card_view:cardCornerRadius="5dp"
         card_view:cardElevation="5dp">
 
-        <android.support.constraint.ConstraintLayout
+        <androidx.constraintlayout.widget.ConstraintLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:background="@drawable/card_background_selector"
@@ -120,7 +120,7 @@
                 card_view:layout_constraintEnd_toEndOf="@+id/teacherexams"
                 card_view:layout_constraintStart_toStartOf="@+id/guideline2" />
 
-            <android.support.constraint.Guideline
+            <androidx.constraintlayout.widget.Guideline
                 android:id="@+id/guideline2"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
@@ -162,6 +162,6 @@
                 card_view:layout_constraintStart_toStartOf="@+id/imageView"
                 card_view:layout_constraintTop_toTopOf="@+id/dateexams" />
 
-        </android.support.constraint.ConstraintLayout>
-    </android.support.v7.widget.CardView>
+        </androidx.constraintlayout.widget.ConstraintLayout>
+    </androidx.cardview.widget.CardView>
 </FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/listview_homeworks_adapter.xml b/app/src/main/res/layout/listview_homeworks_adapter.xml
index 451b761..9cb4e8c 100644
--- a/app/src/main/res/layout/listview_homeworks_adapter.xml
+++ b/app/src/main/res/layout/listview_homeworks_adapter.xml
@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content" >
 
-    <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
+    <androidx.cardview.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
         android:id="@+id/homeworks_cardview"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -14,7 +14,7 @@
         card_view:cardCornerRadius="5dp"
         card_view:cardElevation="5dp">
 
-        <android.support.constraint.ConstraintLayout
+        <androidx.constraintlayout.widget.ConstraintLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:background="@drawable/card_background_selector"
@@ -99,7 +99,7 @@
                 app:layout_constraintStart_toStartOf="@+id/line"
                 app:layout_constraintTop_toBottomOf="@+id/line" />
 
-            <android.support.constraint.Guideline
+            <androidx.constraintlayout.widget.Guideline
                 android:id="@+id/guideline2"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
@@ -116,6 +116,6 @@
                 card_view:layout_constraintTop_toTopOf="@+id/subjecthomework"
                 card_view:srcCompat="@drawable/baseline_expand_more_black_24" />
 
-        </android.support.constraint.ConstraintLayout>
-    </android.support.v7.widget.CardView>
+        </androidx.constraintlayout.widget.ConstraintLayout>
+    </androidx.cardview.widget.CardView>
 </FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/listview_notes_adapter.xml b/app/src/main/res/layout/listview_notes_adapter.xml
index 1e0d220..f390454 100644
--- a/app/src/main/res/layout/listview_notes_adapter.xml
+++ b/app/src/main/res/layout/listview_notes_adapter.xml
@@ -5,7 +5,7 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:descendantFocusability="beforeDescendants">
 
-    <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
+    <androidx.cardview.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
         android:id="@+id/notes_cardview"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -14,7 +14,7 @@
         card_view:cardCornerRadius="5dp"
         card_view:cardElevation="5dp">
 
-    <android.support.constraint.ConstraintLayout
+    <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="@drawable/card_background_selector"
@@ -55,6 +55,6 @@
             card_view:layout_constraintTop_toTopOf="@+id/titlenote"
             card_view:srcCompat="@drawable/baseline_expand_more_black_24" />
 
-    </android.support.constraint.ConstraintLayout>
-    </android.support.v7.widget.CardView>
+    </androidx.constraintlayout.widget.ConstraintLayout>
+    </androidx.cardview.widget.CardView>
 </FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/listview_teachers_adapter.xml b/app/src/main/res/layout/listview_teachers_adapter.xml
index 1e39905..7391f2a 100644
--- a/app/src/main/res/layout/listview_teachers_adapter.xml
+++ b/app/src/main/res/layout/listview_teachers_adapter.xml
@@ -6,7 +6,7 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content">
 
-    <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
+    <androidx.cardview.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
         android:id="@+id/teacher_cardview"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -15,7 +15,7 @@
         card_view:cardCornerRadius="5dp"
         card_view:cardElevation="5dp">
 
-        <android.support.constraint.ConstraintLayout
+        <androidx.constraintlayout.widget.ConstraintLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:background="@drawable/card_background_selector"
@@ -103,7 +103,7 @@
                 card_view:layout_constraintStart_toEndOf="@+id/personimage"
                 card_view:layout_constraintTop_toBottomOf="@+id/line" />
 
-            <android.support.constraint.Guideline
+            <androidx.constraintlayout.widget.Guideline
                 android:id="@+id/guideline2"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
@@ -144,6 +144,6 @@
                 card_view:layout_constraintStart_toStartOf="@+id/personimage"
                 card_view:layout_constraintTop_toTopOf="@+id/numberteacher" />
 
-        </android.support.constraint.ConstraintLayout>
-    </android.support.v7.widget.CardView>
+        </androidx.constraintlayout.widget.ConstraintLayout>
+    </androidx.cardview.widget.CardView>
 </FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/listview_week_adapter.xml b/app/src/main/res/layout/listview_week_adapter.xml
index 5b3e33a..1dce4f0 100644
--- a/app/src/main/res/layout/listview_week_adapter.xml
+++ b/app/src/main/res/layout/listview_week_adapter.xml
@@ -7,7 +7,7 @@
     xmlns:card_view="http://schemas.android.com/apk/res-auto">
 
 
-    <android.support.v7.widget.CardView
+    <androidx.cardview.widget.CardView
         android:id="@+id/week_cardview"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -17,7 +17,7 @@
         card_view:cardCornerRadius="5dp"
         card_view:cardElevation="5dp">
 
-        <android.support.constraint.ConstraintLayout
+        <androidx.constraintlayout.widget.ConstraintLayout
             android:id="@+id/weeklist"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -111,7 +111,7 @@
                 app:layout_constraintVertical_bias="0.0"
                 app:srcCompat="@drawable/baseline_access_time_black_24" />
 
-            <android.support.constraint.Guideline
+            <androidx.constraintlayout.widget.Guideline
                 android:id="@+id/guideline"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
@@ -154,6 +154,6 @@
                 card_view:srcCompat="@drawable/baseline_person_black_24" />
 
 
-        </android.support.constraint.ConstraintLayout>
-    </android.support.v7.widget.CardView>
+        </androidx.constraintlayout.widget.ConstraintLayout>
+    </androidx.cardview.widget.CardView>
 </FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/switch_layout.xml b/app/src/main/res/layout/switch_layout.xml
index fc705f9..b43b722 100644
--- a/app/src/main/res/layout/switch_layout.xml
+++ b/app/src/main/res/layout/switch_layout.xml
@@ -3,7 +3,7 @@
     android:orientation="horizontal" android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <android.support.v7.widget.SwitchCompat
+    <androidx.appcompat.widget.SwitchCompat
         android:id="@+id/drawer_switch"
         android:layout_width="fill_parent"
         android:layout_height="match_parent"
diff --git a/app/src/main/res/xml/settings.xml b/app/src/main/res/xml/settings.xml
index 63c97c1..22015f6 100644
--- a/app/src/main/res/xml/settings.xml
+++ b/app/src/main/res/xml/settings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
 
-    <android.support.v7.preference.SwitchPreferenceCompat
+    <androidx.preference.SwitchPreferenceCompat
         android:defaultValue="false"
         android:key="sevendays"
         android:icon="@drawable/baseline_view_week_black_18"
diff --git a/build.gradle b/build.gradle
index 8d3ef8e..e07c9b9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -7,9 +7,8 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.1'
-        
-
+        classpath 'com.android.tools.build:gradle:3.5.3'
+        classpath 'com.google.gms:google-services:4.3.3'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
diff --git a/gradle.properties b/gradle.properties
index 743d692..c082ae8 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -7,6 +7,9 @@
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
 org.gradle.jvmargs=-Xmx1536m
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
+android.useAndroidX=true
+android.enableJetifier=true
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 92807e0..5bc5ba6 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Thu Oct 18 11:13:08 ALMT 2018
+#Sun Dec 29 21:40:20 BDT 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip