make the headings to change font

app/build.gradle

@@ -11,6 +11,10 @@ plugins {
     id "org.sonarqube" version "4.0.0.2929"
 }
 
+repositories {
+    mavenCentral()
+    maven { url "https://jitpack.io" }
+}
 android {
     compileSdk 34
     namespace 'org.schabi.newpipe'
@@ -103,6 +107,10 @@ android {
                          'META-INF/COPYRIGHT']
         }
     }
+
+    buildFeatures {
+        aidl true
+    }
 }
 
 ext {
@@ -197,9 +205,9 @@ dependencies {
     // Or you can use a commit you pushed to GitHub by just replacing TeamNewPipe with your GitHub
     // name and the commit hash with the commit hash of the (pushed) commit you want to test
     // This works thanks to JitPack: https://jitpack.io/
-    implementation 'com.github.TeamNewPipe:nanojson:1d9e1aea9049fc9f85e68b43ba39fe7be1c1f751'
-    implementation 'com.github.TeamNewPipe:NewPipeExtractor:v0.24.2'
-    implementation 'com.github.TeamNewPipe:NoNonsense-FilePicker:5.0.0'
+    implementation 'com.github.teamnewpipe:nanojson:1d9e1aea9049fc9f85e68b43ba39fe7be1c1f751'
+    implementation 'com.github.teamnewpipe:NewPipeExtractor:v0.24.2'
+    implementation 'com.github.teamnewpipe:NoNonsense-FilePicker:5.0.0'
 
 /** Checkstyle **/
     checkstyle "com.puppycrawl.tools:checkstyle:${checkstyleVersion}"
@@ -237,6 +245,10 @@ dependencies {
     implementation "frankiesardo:icepick:${icepickVersion}"
     kapt "frankiesardo:icepick-processor:${icepickVersion}"
 
+    // changing fonts
+    implementation 'com.github.MarcinOrlowski:fonty:3.1.5'
+
+
     // HTML parser
     implementation "org.jsoup:jsoup:1.17.2"
 

app/src/main/java/org/schabi/newpipe/MainActivity.java

@@ -20,6 +20,7 @@
 
 package org.schabi.newpipe;
 
+import static org.schabi.newpipe.extractor.NewPipe.getPreferredFont;
 import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
 
 import android.content.BroadcastReceiver;
@@ -57,6 +58,7 @@ import androidx.fragment.app.FragmentManager;
 import androidx.preference.PreferenceManager;
 
 import com.google.android.material.bottomsheet.BottomSheetBehavior;
+import com.marcinorlowski.fonty.Fonty;
 
 import org.schabi.newpipe.databinding.ActivityMainBinding;
 import org.schabi.newpipe.databinding.DrawerHeaderBinding;
@@ -130,6 +132,9 @@ public class MainActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(final Bundle savedInstanceState) {
+        // Apply the preferred font globally
+        final String preferredFont = getPreferredFont(this);
+        setUpFont(preferredFont);
         if (DEBUG) {
             Log.d(TAG, "onCreate() called with: "
                     + "savedInstanceState = [" + savedInstanceState + "]");
@@ -174,6 +179,9 @@ public class MainActivity extends AppCompatActivity {
                 && ReleaseVersionUtil.INSTANCE.isReleaseApk()) {
             UpdateSettingsFragment.askForConsentToUpdateChecks(this);
         }
+        if (preferredFont != "default_font_name") {
+            Fonty.setFonts(this);
+        }
     }
 
     @Override
@@ -190,6 +198,45 @@ public class MainActivity extends AppCompatActivity {
             NewVersionWorker.enqueueNewVersionCheckingWork(app, false);
         }
     }
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
+
+    public void setUpFont(final String preferredFont) {
+        switch (preferredFont) {
+            case "Arial":
+                Fonty.context(this)
+                        .normalTypeface("arial.ttf")
+                        .build();
+                break;
+            case "Broadway":
+                Fonty.context(this)
+                        .normalTypeface("BROADW.TTF")
+                        .build();
+                break;
+            case "Algerian":
+                Fonty.context(this)
+                        .normalTypeface("Algerian.TTF")
+                        .build();
+                break;
+            case "Bell TM":
+                Fonty.context(this)
+                        .normalTypeface("BELL.TTF")
+                        .build();
+                break;
+            case "Calibri":
+                Fonty.context(this)
+                        .normalTypeface("calibri.ttf")
+                        .build();
+                break;
+            default:
+                // do nothing
+                break;
+        }
+
+    }
 
     private void setupDrawer() throws ExtractionException {
         addDrawerMenuForCurrentService();

app/src/main/java/org/schabi/newpipe/RouterActivity.java

@@ -41,6 +41,8 @@ import androidx.lifecycle.Lifecycle;
 import androidx.lifecycle.LifecycleOwner;
 import androidx.preference.PreferenceManager;
 
+import com.marcinorlowski.fonty.Fonty;
+
 import org.schabi.newpipe.database.stream.model.StreamEntity;
 import org.schabi.newpipe.databinding.ListRadioIconItemBinding;
 import org.schabi.newpipe.databinding.SingleChoiceDialogViewBinding;
@@ -128,6 +130,7 @@ public class RouterActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(final Bundle savedInstanceState) {
+        final String preferredFont = getPreferredFont(this);
         ThemeHelper.setDayNightMode(this);
         setTheme(ThemeHelper.isLightThemeSelected(this)
                 ? R.style.RouterActivityThemeLight : R.style.RouterActivityThemeDark);
@@ -183,7 +186,17 @@ public class RouterActivity extends AppCompatActivity {
                 finish();
             }
         }
+
+        if (preferredFont != "default_font_name") {
+            Fonty.setFonts(this);
+        }
     }
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
+
 
     @Override
     protected void onStop() {

app/src/main/java/org/schabi/newpipe/download/DownloadActivity.java

@@ -1,6 +1,8 @@
 package org.schabi.newpipe.download;
 
+import android.content.Context;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -10,6 +12,7 @@ import android.view.ViewTreeObserver;
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.fragment.app.FragmentTransaction;
+import androidx.preference.PreferenceManager;
 
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.databinding.ActivityDownloaderBinding;
@@ -22,6 +25,8 @@ import us.shandian.giga.ui.fragment.MissionsFragment;
 
 import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
 
+import com.marcinorlowski.fonty.Fonty;
+
 public class DownloadActivity extends AppCompatActivity {
 
     private static final String MISSIONS_FRAGMENT_TAG = "fragment_tag";
@@ -63,6 +68,10 @@ public class DownloadActivity extends AppCompatActivity {
         if (DeviceUtils.isTv(this)) {
             FocusOverlayView.setupFocusObserver(this);
         }
+        final String preferredFont = getPreferredFont(this);
+        if (preferredFont != "default_font_name") {
+            Fonty.setFonts(this);
+        }
     }
 
     private void updateFragments() {
@@ -73,6 +82,12 @@ public class DownloadActivity extends AppCompatActivity {
                 .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE)
                 .commit();
     }
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
+
 
     @Override
     public boolean onCreateOptionsMenu(final Menu menu) {

app/src/main/java/org/schabi/newpipe/error/ErrorActivity.java

@@ -4,6 +4,7 @@ import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
 
 import android.content.Context;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
@@ -16,8 +17,10 @@ import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.content.IntentCompat;
+import androidx.preference.PreferenceManager;
 
 import com.grack.nanojson.JsonWriter;
+import com.marcinorlowski.fonty.Fonty;
 
 import org.schabi.newpipe.BuildConfig;
 import org.schabi.newpipe.R;
@@ -83,6 +86,8 @@ public class ErrorActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(final Bundle savedInstanceState) {
+        final String preferredFont = getPreferredFont(this);
+
         assureCorrectAppLanguage(this);
         super.onCreate(savedInstanceState);
 
@@ -127,6 +132,9 @@ public class ErrorActivity extends AppCompatActivity {
         for (final String e : errorInfo.getStackTraces()) {
             Log.e(TAG, e);
         }
+        if (preferredFont != "default_font_name") {
+            Fonty.setFonts(this);
+        }
     }
 
     @Override
@@ -150,6 +158,13 @@ public class ErrorActivity extends AppCompatActivity {
                 return false;
         }
     }
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
+
+
 
     private void openPrivacyPolicyDialog(final Context context, final String action) {
         new AlertDialog.Builder(context)

app/src/main/java/org/schabi/newpipe/error/ReCaptchaActivity.java

@@ -1,6 +1,7 @@
 package org.schabi.newpipe.error;
 
 import android.annotation.SuppressLint;
+import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
@@ -20,6 +21,8 @@ import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.app.NavUtils;
 import androidx.preference.PreferenceManager;
 
+import com.marcinorlowski.fonty.Fonty;
+
 import org.schabi.newpipe.DownloaderImpl;
 import org.schabi.newpipe.MainActivity;
 import org.schabi.newpipe.R;
@@ -68,6 +71,7 @@ public class ReCaptchaActivity extends AppCompatActivity {
     @SuppressLint("SetJavaScriptEnabled")
     @Override
     protected void onCreate(final Bundle savedInstanceState) {
+        final String preferredFont = getPreferredFont(this);
         ThemeHelper.setTheme(this);
         super.onCreate(savedInstanceState);
 
@@ -109,6 +113,10 @@ public class ReCaptchaActivity extends AppCompatActivity {
         CookieManager.getInstance().removeAllCookies(null);
 
         recaptchaBinding.reCaptchaWebView.loadUrl(url);
+
+        if (preferredFont != "default_font_name") {
+            Fonty.setFonts(this);
+        }
     }
 
     @Override
@@ -129,6 +137,12 @@ public class ReCaptchaActivity extends AppCompatActivity {
     public void onBackPressed() {
         saveCookiesAndFinish();
     }
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
+
 
     @Override
     public boolean onOptionsItemSelected(final MenuItem item) {

app/src/main/java/org/schabi/newpipe/fragments/EmptyFragment.java

@@ -1,11 +1,14 @@
 package org.schabi.newpipe.fragments;
 
+import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
 import androidx.annotation.Nullable;
+import androidx.preference.PreferenceManager;
 
 import org.schabi.newpipe.BaseFragment;
 import org.schabi.newpipe.R;
@@ -20,7 +23,11 @@ public class EmptyFragment extends BaseFragment {
         emptyFragment.setArguments(bundle);
         return emptyFragment;
     }
-
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
     @Override
     public View onCreateView(final LayoutInflater inflater, @Nullable final ViewGroup container,
                              final Bundle savedInstanceState) {

app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java

@@ -91,7 +91,11 @@ public class MainFragment extends BaseFragment implements TabLayout.OnTabSelecte
         mainTabsPositionKey = getString(R.string.main_tabs_position_key);
         mainTabsPositionBottom = prefs.getBoolean(mainTabsPositionKey, false);
     }
-
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
     @Override
     public View onCreateView(@NonNull final LayoutInflater inflater,
                              @Nullable final ViewGroup container,

app/src/main/java/org/schabi/newpipe/fragments/list/kiosk/KioskFragment.java

@@ -1,5 +1,7 @@
 package org.schabi.newpipe.fragments.list.kiosk;
 
+import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -10,6 +12,7 @@ import android.view.ViewGroup;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.app.ActionBar;
+import androidx.preference.PreferenceManager;
 
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.error.ErrorInfo;
@@ -100,7 +103,11 @@ public class KioskFragment extends BaseListInfoFragment<StreamInfoItem, KioskInf
         name = kioskTranslatedName;
         contentCountry = Localization.getPreferredContentCountry(requireContext());
     }
-
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
     @Override
     public void onResume() {
         super.onResume();

app/src/main/java/org/schabi/newpipe/fragments/list/playlist/PlaylistFragment.java

@@ -6,6 +6,7 @@ import static org.schabi.newpipe.ktx.ViewUtils.animateHideRecyclerViewAllowingSc
 import static org.schabi.newpipe.util.ServiceHelper.getServiceById;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.text.TextUtils;
 import android.util.Log;
@@ -19,9 +20,11 @@ import android.view.ViewGroup;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.content.res.AppCompatResources;
+import androidx.preference.PreferenceManager;
 
 import com.google.android.material.shape.CornerFamily;
 import com.google.android.material.shape.ShapeAppearanceModel;
+import com.marcinorlowski.fonty.Fonty;
 
 import org.reactivestreams.Subscriber;
 import org.reactivestreams.Subscription;
@@ -98,7 +101,11 @@ public class PlaylistFragment extends BaseListInfoFragment<StreamInfoItem, Playl
         instance.setInitialData(serviceId, url, name);
         return instance;
     }
-
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
     public PlaylistFragment() {
         super(UserAction.REQUESTED_PLAYLIST);
     }
@@ -120,7 +127,12 @@ public class PlaylistFragment extends BaseListInfoFragment<StreamInfoItem, Playl
     public View onCreateView(@NonNull final LayoutInflater inflater,
                              @Nullable final ViewGroup container,
                              @Nullable final Bundle savedInstanceState) {
-        return inflater.inflate(R.layout.fragment_playlist, container, false);
+        final View view = inflater.inflate(R.layout.fragment_playlist, container, false);
+        final String preferredFont = getPreferredFont(view.getContext());
+        if (preferredFont != "default_font_name") {
+            Fonty.setFonts((ViewGroup) view);
+        }
+        return view;
     }
 
     /*//////////////////////////////////////////////////////////////////////////

app/src/main/java/org/schabi/newpipe/local/feed/FeedFragment.kt

@@ -124,7 +124,11 @@ class FeedFragment : BaseStateFragment<FeedState>() {
         PreferenceManager.getDefaultSharedPreferences(activity)
             .registerOnSharedPreferenceChangeListener(onSettingsChangeListener)
     }
-
+//    fun getPreferredFont(context: Context?): String? {
+//        val preferences = PreferenceManager
+//            .getDefaultSharedPreferences(context!!)
+//        return preferences.getString("preferred_font", "default_font_name")
+//    }
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         return inflater.inflate(R.layout.fragment_feed, container, false)
     }

app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistFragment.java

@@ -5,6 +5,7 @@ import static org.schabi.newpipe.ktx.ViewUtils.animate;
 import static org.schabi.newpipe.util.ThemeHelper.shouldUseGridLayout;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.os.Parcelable;
 import android.text.InputType;
@@ -22,6 +23,7 @@ import android.widget.Toast;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.app.AlertDialog;
+import androidx.preference.PreferenceManager;
 import androidx.recyclerview.widget.ItemTouchHelper;
 import androidx.recyclerview.widget.RecyclerView;
 import androidx.viewbinding.ViewBinding;
@@ -125,7 +127,11 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
         isLoadingComplete = new AtomicBoolean();
         debounceSaver = new DebounceSaver(this);
     }
-
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
     @Override
     public View onCreateView(@NonNull final LayoutInflater inflater,
                              @Nullable final ViewGroup container,

app/src/main/java/org/schabi/newpipe/player/PlayQueueActivity.java

@@ -5,8 +5,10 @@ import static org.schabi.newpipe.player.helper.PlayerHelper.formatSpeed;
 import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
 
 import android.content.ComponentName;
+import android.content.Context;
 import android.content.Intent;
 import android.content.ServiceConnection;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.os.IBinder;
 import android.provider.Settings;
@@ -21,11 +23,13 @@ import android.widget.SeekBar;
 
 import androidx.annotation.Nullable;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.preference.PreferenceManager;
 import androidx.recyclerview.widget.ItemTouchHelper;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.google.android.exoplayer2.PlaybackParameters;
+import com.marcinorlowski.fonty.Fonty;
 
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.databinding.ActivityPlayerQueueControlBinding;
@@ -84,6 +88,7 @@ public final class PlayQueueActivity extends AppCompatActivity
 
     @Override
     protected void onCreate(final Bundle savedInstanceState) {
+        final String preferredFont = getPreferredFont(this);
         assureCorrectAppLanguage(this);
         super.onCreate(savedInstanceState);
         ThemeHelper.setTheme(this, ServiceHelper.getSelectedServiceId(this));
@@ -99,6 +104,9 @@ public final class PlayQueueActivity extends AppCompatActivity
 
         serviceConnection = getServiceConnection();
         bind();
+        if (preferredFont != "default_font_name") {
+            Fonty.setFonts(this);
+        }
     }
 
     @Override
@@ -126,6 +134,12 @@ public final class PlayQueueActivity extends AppCompatActivity
         }
         return super.onPrepareOptionsMenu(m);
     }
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
+
 
     @Override
     public boolean onOptionsItemSelected(final MenuItem item) {

app/src/main/java/org/schabi/newpipe/settings/ContentSettingsFragment.java

@@ -1,11 +1,13 @@
 package org.schabi.newpipe.settings;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.util.Log;
 import android.widget.Toast;
 
 import androidx.preference.Preference;
+import androidx.preference.PreferenceManager;
 
 import org.schabi.newpipe.DownloaderImpl;
 import org.schabi.newpipe.R;
@@ -22,6 +24,7 @@ public class ContentSettingsFragment extends BasePreferenceFragment {
     private String youtubeRestrictedModeEnabledKey;
 
     private Localization initialSelectedLocalization;
+    private String initialSelectedFont;
     private ContentCountry initialSelectedContentCountry;
     private String initialLanguage;
 
@@ -36,7 +39,8 @@ public class ContentSettingsFragment extends BasePreferenceFragment {
         initialSelectedContentCountry = org.schabi.newpipe.util.Localization
                 .getPreferredContentCountry(requireContext());
         initialLanguage = defaultPreferences.getString(getString(R.string.app_language_key), "en");
-
+        initialSelectedFont = defaultPreferences
+                .getString(getString(R.string.app_font_key), "Default");
         final Preference imageQualityPreference = requirePreference(R.string.image_quality_key);
         imageQualityPreference.setOnPreferenceChangeListener(
                 (preference, newValue) -> {
@@ -78,7 +82,8 @@ public class ContentSettingsFragment extends BasePreferenceFragment {
                 .getPreferredContentCountry(requireContext());
         final String selectedLanguage =
                 defaultPreferences.getString(getString(R.string.app_language_key), "en");
-
+        final String selectedFont =
+                defaultPreferences.getString(getString(R.string.app_font_key), "Arial");
         if (!selectedLocalization.equals(initialSelectedLocalization)
                 || !selectedContentCountry.equals(initialSelectedContentCountry)
                 || !selectedLanguage.equals(initialLanguage)) {
@@ -86,6 +91,15 @@ public class ContentSettingsFragment extends BasePreferenceFragment {
                     Toast.LENGTH_LONG).show();
 
             NewPipe.setupLocalization(selectedLocalization, selectedContentCountry);
+        } else if ((!selectedFont.equals(initialSelectedFont))) {
+            Toast.makeText(requireContext(), R.string.font_changes_requires_app_restart,
+                    Toast.LENGTH_LONG).show();
+            NewPipe.setupFont(selectedFont);
+            final SharedPreferences preferences = PreferenceManager
+                    .getDefaultSharedPreferences(requireContext());
+            final SharedPreferences.Editor editor = preferences.edit();
+            editor.putString("preferred_font", selectedFont);
+            editor.apply();
         }
     }
 }

app/src/main/java/org/schabi/newpipe/settings/HistorySettingsFragment.java

@@ -1,12 +1,14 @@
 package org.schabi.newpipe.settings;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AlertDialog;
 import androidx.preference.Preference;
+import androidx.preference.PreferenceManager;
 
 import org.schabi.newpipe.DownloaderImpl;
 import org.schabi.newpipe.R;
@@ -55,7 +57,11 @@ public class HistorySettingsFragment extends BasePreferenceFragment {
             clearCookiePref.setEnabled(false);
         }
     }
-
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
     @Override
     public boolean onPreferenceTreeClick(final Preference preference) {
         if (preference.getKey().equals(cacheWipeKey)) {

app/src/main/java/org/schabi/newpipe/settings/MainSettingsFragment.java

@@ -1,11 +1,14 @@
 package org.schabi.newpipe.settings;
 
+import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 
 import androidx.annotation.NonNull;
+import androidx.preference.PreferenceManager;
 
 import org.schabi.newpipe.MainActivity;
 import org.schabi.newpipe.R;
@@ -58,7 +61,11 @@ public class MainSettingsFragment extends BasePreferenceFragment {
             return true;
         });
     }
-
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
     @Override
     public void onDestroy() {
         // Unlink activity so that we don't get memory problems

app/src/main/java/org/schabi/newpipe/settings/SettingsActivity.java

@@ -3,6 +3,7 @@ package org.schabi.newpipe.settings;
 import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.text.TextUtils;
 import android.util.Log;
@@ -20,8 +21,10 @@ import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentManager;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
+import androidx.preference.PreferenceManager;
 
 import com.jakewharton.rxbinding4.widget.RxTextView;
+import com.marcinorlowski.fonty.Fonty;
 
 import org.schabi.newpipe.MainActivity;
 import org.schabi.newpipe.R;
@@ -89,6 +92,7 @@ public class SettingsActivity extends AppCompatActivity implements
 
     @Override
     protected void onCreate(final Bundle savedInstanceBundle) {
+
         setTheme(ThemeHelper.getSettingsThemeStyle(this));
         assureCorrectAppLanguage(this);
 
@@ -120,6 +124,10 @@ public class SettingsActivity extends AppCompatActivity implements
         if (DeviceUtils.isTv(this)) {
             FocusOverlayView.setupFocusObserver(this);
         }
+        final String preferredFont = getPreferredFont(this);
+        if (preferredFont != "default_font_name") {
+            Fonty.setFonts(this);
+        }
     }
 
     @Override
@@ -257,6 +265,12 @@ public class SettingsActivity extends AppCompatActivity implements
         }
         searchFragment.setSearcher(searcher);
     }
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
+
 
     /**
      * Ensures that the search shows the correct/available search results.

app/src/main/java/org/schabi/newpipe/util/FilePickerActivityHelper.java

@@ -1,6 +1,7 @@
 package org.schabi.newpipe.util;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Environment;
@@ -14,9 +15,11 @@ import android.widget.Toast;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.loader.content.Loader;
+import androidx.preference.PreferenceManager;
 import androidx.recyclerview.widget.RecyclerView;
 import androidx.recyclerview.widget.SortedList;
 
+import com.marcinorlowski.fonty.Fonty;
 import com.nononsenseapps.filepicker.AbstractFilePickerFragment;
 import com.nononsenseapps.filepicker.FilePickerFragment;
 
@@ -36,12 +39,17 @@ public class FilePickerActivityHelper extends com.nononsenseapps.filepicker.File
 
     @Override
     public void onCreate(final Bundle savedInstanceState) {
+        final String preferredFont = getPreferredFont(this);
         if (ThemeHelper.isLightThemeSelected(this)) {
             this.setTheme(R.style.FilePickerThemeLight);
         } else {
             this.setTheme(R.style.FilePickerThemeDark);
         }
         super.onCreate(savedInstanceState);
+
+        if (preferredFont != "default_font_name") {
+            Fonty.setFonts(this);
+        }
     }
 
     @Override
@@ -54,6 +62,13 @@ public class FilePickerActivityHelper extends com.nononsenseapps.filepicker.File
             currentFragment.goUp();
         }
     }
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
+
+
 
     @Override
     protected AbstractFilePickerFragment<File> getFragment(@Nullable final String startPath,

app/src/main/java/us/shandian/giga/service/DownloadManagerService.java

@@ -129,6 +129,7 @@ public class DownloadManagerService extends Service {
 
     @Override
     public void onCreate() {
+
         super.onCreate();
 
         if (DEBUG) {

app/src/main/java/us/shandian/giga/ui/common/ToolbarActivity.java

@@ -1,9 +1,14 @@
 package us.shandian.giga.ui.common;
 
+import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
+import androidx.preference.PreferenceManager;
+
+import com.marcinorlowski.fonty.Fonty;
 
 import org.schabi.newpipe.R;
 
@@ -12,13 +17,24 @@ public abstract class ToolbarActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
+        final String preferredFont = getPreferredFont(this);
         super.onCreate(savedInstanceState);
         setContentView(getLayoutResource());
 
         mToolbar = this.findViewById(R.id.toolbar);
 
         setSupportActionBar(mToolbar);
+
+        if (preferredFont != "default_font_name") {
+            Fonty.setFonts(this);
+        }
     }
+    public String getPreferredFont(final Context context) {
+        final SharedPreferences preferences = PreferenceManager
+                .getDefaultSharedPreferences(context);
+        return preferences.getString("preferred_font", "default_font_name");
+    }
+
 
     protected abstract int getLayoutResource();
 }

app/src/main/res/layout-land/list_stream_card_item.xml

@@ -1 +0,0 @@
-../layout/list_stream_item.xml

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

@@ -354,6 +354,8 @@
 
     <string name="app_language_key">app_language_key</string>
 
+    <string name="app_font_key">app_font_key</string>
+
     <string name="feed_update_threshold_key">feed_update_threshold_key</string>
     <string name="feed_update_threshold_default_value">300</string>
     <string name="feed_show_watched_items_key">feed_show_played_items</string>
@@ -1343,6 +1345,29 @@
         <item>正體中文</item>
     </string-array>
 
+
+
+    <!--The next two arrays are set to change the app font-->
+    <string-array name="app_font_code">
+        <item>@string/default_localization_key</item>
+        <item>Calibri</item>
+        <item>Algerian</item>
+        <item>Broadway</item>
+        <item>Arial</item>
+        <item>Bell MT</item>
+        <item>Time New Roman</item>
+    </string-array>
+    <string-array name="app_font_name">
+        <item>@string/systems_font</item>
+        <item>Calibri</item>
+        <item>Algerian</item>
+        <item>Broadway</item>
+        <item>Arial</item>
+        <item>Bell MT</item>
+        <item>Time New Roman</item>
+    </string-array>
+
+
     <!-- Limit mobile data usage  -->
     <string name="limit_mobile_data_usage_key">limit_mobile_data_usage</string>
     <string name="limit_data_usage_none_key">limit_data_usage_none</string>

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

@@ -411,6 +411,7 @@
     <string name="import_settings">Do you want to also import settings?</string>
     <string name="error_unable_to_load_comments">Could not load comments</string>
     <string name="localization_changes_requires_app_restart">The language will change once the app is restarted</string>
+    <string name="font_changes_requires_app_restart">The font will change once the app is restarted</string>
     <!-- Kiosk Names -->
     <string name="trending">Trending</string>
     <string name="top_50">Top 50</string>
@@ -658,6 +659,9 @@
     <string name="choose_instance_prompt">Choose an instance</string>
     <string name="app_language_title">App language</string>
     <string name="systems_language">System default</string>
+    <string name="systems_font">System default</string>
+    <string name="app_font_title">App font</string>
+
     <string name="remove_watched">Remove watched</string>
     <string name="remove_watched_popup_title">Remove watched videos?</string>
     <string name="remove_duplicates">Remove duplicates</string>

app/src/main/res/xml/content_settings.xml

@@ -33,6 +33,16 @@
         app:iconSpaceReserved="false"
         app:useSimpleSummaryProvider="true" />
 
+    <ListPreference
+        android:defaultValue="@string/default_localization_key"
+        android:entries="@array/app_font_name"
+        android:entryValues="@array/app_font_code"
+        android:key="@string/app_font_key"
+        android:title="@string/app_font_title"
+        app:singleLineTitle="false"
+        app:iconSpaceReserved="false"
+        app:useSimpleSummaryProvider="true" />
+
     <PreferenceScreen
         android:fragment="org.schabi.newpipe.settings.tabs.ChooseTabsFragment"
         android:key="@string/main_page_content_key"

settings.gradle

@@ -4,8 +4,8 @@ include ':app'
 // We assume, that NewPipe and NewPipe Extractor have the same parent directory.
 // If this is not the case, please change the path in includeBuild().
 
-//includeBuild('../NewPipeExtractor') {
-//    dependencySubstitution {
-//        substitute module('com.github.TeamNewPipe:NewPipeExtractor') using project(':extractor')
-//    }
-//}
+includeBuild('../NewPipeExtractor') {
+    dependencySubstitution {
+        substitute module('com.github.teamnewpipe:NewPipeExtractor') using project(':extractor')
+    }
+}