diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 1091ef63..c18183cc 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -267,7 +267,8 @@
         <activity
             android:name=".Activity.ViewVideoActivity"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.ActionBar.Transparent" />
+            android:theme="@style/AppTheme.ActionBar.Transparent"
+            android:configChanges="orientation|screenSize|layoutDirection" />
         <activity
             android:name=".Activity.ViewPostDetailActivity"
             android:parentActivityName=".Activity.MainActivity"
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/AppComponent.java b/app/src/main/java/ml/docilealligator/infinityforreddit/AppComponent.java
index 17b2be5c..bdc69bcd 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/AppComponent.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/AppComponent.java
@@ -46,6 +46,7 @@ import ml.docilealligator.infinityforreddit.Fragment.SubredditListingFragment;
 import ml.docilealligator.infinityforreddit.Fragment.SubscribedSubredditsListingFragment;
 import ml.docilealligator.infinityforreddit.Fragment.UserListingFragment;
 import ml.docilealligator.infinityforreddit.Service.SubmitPostService;
+import ml.docilealligator.infinityforreddit.Settings.AdvancedPreferenceFragment;
 import ml.docilealligator.infinityforreddit.Settings.GesturesAndButtonsPreferenceFragment;
 import ml.docilealligator.infinityforreddit.Settings.MainPreferenceFragment;
 import ml.docilealligator.infinityforreddit.Settings.NotificationPreferenceFragment;
@@ -149,4 +150,6 @@ public interface AppComponent {
     void inject(CustomThemeListingActivity customThemeListingActivity);
 
     void inject(SidebarFragment sidebarFragment);
+
+    void inject(AdvancedPreferenceFragment advancedPreferenceFragment);
 }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/AsyncTask/DeleteAllSubredditsAsyncTask.java b/app/src/main/java/ml/docilealligator/infinityforreddit/AsyncTask/DeleteAllSubredditsAsyncTask.java
new file mode 100644
index 00000000..db39f9c1
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/AsyncTask/DeleteAllSubredditsAsyncTask.java
@@ -0,0 +1,33 @@
+package ml.docilealligator.infinityforreddit.AsyncTask;
+
+import android.os.AsyncTask;
+
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+
+public class DeleteAllSubredditsAsyncTask extends AsyncTask<Void, Void, Void> {
+
+    private RedditDataRoomDatabase redditDataRoomDatabase;
+    private DeleteAllSubredditsAsyncTaskListener deleteAllSubredditsAsyncTaskListener;
+
+    public interface DeleteAllSubredditsAsyncTaskListener {
+        void success();
+    }
+
+    public DeleteAllSubredditsAsyncTask(RedditDataRoomDatabase redditDataRoomDatabase,
+                                        DeleteAllSubredditsAsyncTaskListener deleteAllSubredditsAsyncTaskListener) {
+        this.redditDataRoomDatabase = redditDataRoomDatabase;
+        this.deleteAllSubredditsAsyncTaskListener = deleteAllSubredditsAsyncTaskListener;
+    }
+
+    @Override
+    protected Void doInBackground(Void... voids) {
+        redditDataRoomDatabase.subredditDao().deleteAllSubreddits();
+        return null;
+    }
+
+    @Override
+    protected void onPostExecute(Void aVoid) {
+        super.onPostExecute(aVoid);
+        deleteAllSubredditsAsyncTaskListener.success();
+    }
+}
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/AsyncTask/DeleteAllUsersAsyncTask.java b/app/src/main/java/ml/docilealligator/infinityforreddit/AsyncTask/DeleteAllUsersAsyncTask.java
new file mode 100644
index 00000000..d73f749c
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/AsyncTask/DeleteAllUsersAsyncTask.java
@@ -0,0 +1,33 @@
+package ml.docilealligator.infinityforreddit.AsyncTask;
+
+import android.os.AsyncTask;
+
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+
+public class DeleteAllUsersAsyncTask extends AsyncTask<Void, Void, Void> {
+
+    private RedditDataRoomDatabase redditDataRoomDatabase;
+    private DeleteAllUsersAsyncTaskListener deleteAllUsersAsyncTaskListener;
+
+    public interface DeleteAllUsersAsyncTaskListener {
+        void success();
+    }
+
+    public DeleteAllUsersAsyncTask(RedditDataRoomDatabase redditDataRoomDatabase,
+                                   DeleteAllUsersAsyncTaskListener deleteAllUsersAsyncTaskListener) {
+        this.redditDataRoomDatabase = redditDataRoomDatabase;
+        this.deleteAllUsersAsyncTaskListener = deleteAllUsersAsyncTaskListener;
+    }
+
+    @Override
+    protected Void doInBackground(Void... voids) {
+        redditDataRoomDatabase.userDao().deleteAllUsers();
+        return null;
+    }
+
+    @Override
+    protected void onPostExecute(Void aVoid) {
+        super.onPostExecute(aVoid);
+        deleteAllUsersAsyncTaskListener.success();
+    }
+}
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/AdvancedPreferenceFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/AdvancedPreferenceFragment.java
index 7af72c72..5101e60c 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/AdvancedPreferenceFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/AdvancedPreferenceFragment.java
@@ -1,12 +1,25 @@
 package ml.docilealligator.infinityforreddit.Settings;
 
+import android.app.Activity;
+import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Bundle;
+import android.widget.Toast;
 
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
 import androidx.fragment.app.Fragment;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
 
+import javax.inject.Inject;
+import javax.inject.Named;
+
+import ml.docilealligator.infinityforreddit.AsyncTask.DeleteAllSubredditsAsyncTask;
+import ml.docilealligator.infinityforreddit.AsyncTask.DeleteAllUsersAsyncTask;
+import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 
 /**
@@ -14,13 +27,56 @@ import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
  */
 public class AdvancedPreferenceFragment extends PreferenceFragmentCompat {
 
+    @Inject
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
+    @Inject
+    @Named("default")
+    SharedPreferences mSharedPreferences;
+    private Activity activity;
+
     @Override
     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
         setPreferencesFromResource(R.xml.advanced_preferences, rootKey);
 
+        ((Infinity) activity.getApplication()).getAppComponent().inject(this);
+
         Preference deleteSubredditsPreference = findPreference(SharedPreferencesUtils.DELETE_ALL_SUBREDDITS_DATA_IN_DATABASE);
         Preference deleteUsersPreference = findPreference(SharedPreferencesUtils.DELETE_ALL_USERS_DATA_IN_DATABASE);
         Preference deleteSortTypePreference = findPreference(SharedPreferencesUtils.DELETE_ALL_SORT_TYPE_DATA_IN_DATABASE);
         Preference deletePostLaoutPreference = findPreference(SharedPreferencesUtils.DELETE_ALL_POST_LAYOUT_DATA_IN_DATABASE);
+
+        deleteSubredditsPreference.setOnPreferenceClickListener(preference -> {
+            new DeleteAllSubredditsAsyncTask(mRedditDataRoomDatabase,
+                    () -> Toast.makeText(activity, R.string.delete_all_subreddits_success, Toast.LENGTH_SHORT).show()).execute();
+            return true;
+        });
+
+        deleteUsersPreference.setOnPreferenceClickListener(preference -> {
+            new DeleteAllUsersAsyncTask(mRedditDataRoomDatabase,
+                    () -> Toast.makeText(activity, R.string.delete_all_users_success, Toast.LENGTH_SHORT).show()).execute();
+            return true;
+        });
+
+        deleteSortTypePreference.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+
+                return false;
+            }
+        });
+
+        deletePostLaoutPreference.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+
+                return false;
+            }
+        });
+    }
+
+    @Override
+    public void onAttach(@NonNull Context context) {
+        super.onAttach(context);
+        activity = (AppCompatActivity) context;
     }
 }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 45de4c40..a05fb242 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -643,7 +643,7 @@
     <string name="color_picker">Color Picker</string>
     <string name="invalid_color">Invalid Color</string>
 
-    <!-- TODO: Remove or change this placeholder text -->
-    <string name="hello_blank_fragment">Hello blank fragment</string>
+    <string name="delete_all_subreddits_success">Delete all subreddits successful</string>
+    <string name="delete_all_users_success">Delete all users successful</string>
 
 </resources>