From cc72fa4793dfc357c53da7108fd9c386e9839be9 Mon Sep 17 00:00:00 2001
From: TacoTheDank <SkytkRSfan3895@gmail.com>
Date: Mon, 29 Mar 2021 19:05:57 -0400
Subject: [PATCH 1/3] Renamed things pertaining to the about package

---
 .../schabi/newpipe/about/AboutActivity.java   | 22 +++++++++----------
 .../schabi/newpipe/about/LicenseFragment.java |  8 +++----
 app/src/main/res/layout/activity_about.xml    |  8 +++----
 app/src/main/res/layout/fragment_about.xml    | 19 +++++-----------
 app/src/main/res/layout/fragment_licenses.xml |  6 ++---
 app/src/main/res/menu/software_component.xml  |  6 ++---
 6 files changed, 29 insertions(+), 40 deletions(-)

diff --git a/app/src/main/java/org/schabi/newpipe/about/AboutActivity.java b/app/src/main/java/org/schabi/newpipe/about/AboutActivity.java
index ec28be237..6db464f64 100644
--- a/app/src/main/java/org/schabi/newpipe/about/AboutActivity.java
+++ b/app/src/main/java/org/schabi/newpipe/about/AboutActivity.java
@@ -85,16 +85,16 @@ public class AboutActivity extends AppCompatActivity {
         final ActivityAboutBinding aboutBinding = ActivityAboutBinding.inflate(getLayoutInflater());
         setContentView(aboutBinding.getRoot());
 
-        setSupportActionBar(aboutBinding.toolbar);
+        setSupportActionBar(aboutBinding.aboutToolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         // Create the adapter that will return a fragment for each of the three
         // primary sections of the activity.
-        final SectionsPagerAdapter mSectionsPagerAdapter = new SectionsPagerAdapter(this);
+        final AboutStateAdapter mAboutStateAdapter = new AboutStateAdapter(this);
 
         // Set up the ViewPager with the sections adapter.
-        aboutBinding.container.setAdapter(mSectionsPagerAdapter);
+        aboutBinding.aboutViewPager2.setAdapter(mAboutStateAdapter);
 
-        new TabLayoutMediator(aboutBinding.tabs, aboutBinding.container, (tab, position) -> {
+        new TabLayoutMediator(aboutBinding.aboutTabLayout, aboutBinding.aboutViewPager2, (tab, position) -> {
             switch (position) {
                 default:
                 case POS_ABOUT:
@@ -143,18 +143,18 @@ public class AboutActivity extends AppCompatActivity {
                     FragmentAboutBinding.inflate(inflater, container, false);
             final Context context = getContext();
 
-            aboutBinding.appVersion.setText(BuildConfig.VERSION_NAME);
+            aboutBinding.aboutAppVersion.setText(BuildConfig.VERSION_NAME);
 
-            aboutBinding.githubLink.setOnClickListener(nv ->
+            aboutBinding.aboutGithubLink.setOnClickListener(nv ->
                     openUrlInBrowser(context, context.getString(R.string.github_url), false));
 
-            aboutBinding.donationLink.setOnClickListener(v ->
+            aboutBinding.aboutDonationLink.setOnClickListener(v ->
                     openUrlInBrowser(context, context.getString(R.string.donation_url), false));
 
-            aboutBinding.websiteLink.setOnClickListener(nv ->
+            aboutBinding.aboutWebsiteLink.setOnClickListener(nv ->
                     openUrlInBrowser(context, context.getString(R.string.website_url), false));
 
-            aboutBinding.privacyPolicyLink.setOnClickListener(v ->
+            aboutBinding.aboutPrivacyPolicyLink.setOnClickListener(v ->
                     openUrlInBrowser(context, context.getString(R.string.privacy_policy_url),
                             false));
 
@@ -166,8 +166,8 @@ public class AboutActivity extends AppCompatActivity {
      * A {@link FragmentStateAdapter} that returns a fragment corresponding to
      * one of the sections/tabs/pages.
      */
-    public static class SectionsPagerAdapter extends FragmentStateAdapter {
-        public SectionsPagerAdapter(final FragmentActivity fa) {
+    private static class AboutStateAdapter extends FragmentStateAdapter {
+        AboutStateAdapter(final FragmentActivity fa) {
             super(fa);
         }
 
diff --git a/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.java b/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.java
index f5bf4df19..822161806 100644
--- a/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.java
@@ -74,7 +74,7 @@ public class LicenseFragment extends Fragment {
         final FragmentLicensesBinding binding = FragmentLicensesBinding
                 .inflate(inflater, container, false);
 
-        binding.appReadLicense.setOnClickListener(v -> {
+        binding.licensesAppReadLicense.setOnClickListener(v -> {
             activeLicense = StandardLicenses.GPL3;
             compositeDisposable.add(LicenseFragmentHelper.showLicense(getActivity(),
                     StandardLicenses.GPL3));
@@ -96,7 +96,7 @@ public class LicenseFragment extends Fragment {
                 compositeDisposable.add(LicenseFragmentHelper.showLicense(getActivity(),
                         component.getLicense()));
             });
-            binding.softwareComponents.addView(root);
+            binding.licensesSoftwareComponents.addView(root);
             registerForContextMenu(root);
         }
         if (activeLicense != null) {
@@ -125,10 +125,10 @@ public class LicenseFragment extends Fragment {
             return false;
         }
         switch (item.getItemId()) {
-            case R.id.action_website:
+            case R.id.menu_software_website:
                 ShareUtils.openUrlInBrowser(getActivity(), component.getLink());
                 return true;
-            case R.id.action_show_license:
+            case R.id.menu_software_show_license:
                 compositeDisposable.add(LicenseFragmentHelper.showLicense(getActivity(),
                         component.getLicense()));
         }
diff --git a/app/src/main/res/layout/activity_about.xml b/app/src/main/res/layout/activity_about.xml
index 525b2371f..937fcf977 100644
--- a/app/src/main/res/layout/activity_about.xml
+++ b/app/src/main/res/layout/activity_about.xml
@@ -2,14 +2,12 @@
 <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/main_content"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:fitsSystemWindows="true"
     tools:context="org.schabi.newpipe.about.AboutActivity">
 
     <com.google.android.material.appbar.AppBarLayout
-        android:id="@+id/appbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="@dimen/appbar_padding_top"
@@ -17,21 +15,21 @@
         app:popupTheme="@style/ThemeOverlay.AppCompat.ActionBar">
 
         <androidx.appcompat.widget.Toolbar
-            android:id="@+id/toolbar"
+            android:id="@+id/about_toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
             android:background="?attr/colorPrimary"
             app:layout_scrollFlags="scroll|enterAlways" />
 
         <com.google.android.material.tabs.TabLayout
-            android:id="@+id/tabs"
+            android:id="@+id/about_tabLayout"
             android:layout_width="match_parent"
             android:layout_height="wrap_content" />
 
     </com.google.android.material.appbar.AppBarLayout>
 
     <androidx.viewpager2.widget.ViewPager2
-        android:id="@+id/container"
+        android:id="@+id/about_viewPager2"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         app:layout_behavior="@string/appbar_scrolling_view_behavior" />
diff --git a/app/src/main/res/layout/fragment_about.xml b/app/src/main/res/layout/fragment_about.xml
index 77f940685..3211f3bd9 100644
--- a/app/src/main/res/layout/fragment_about.xml
+++ b/app/src/main/res/layout/fragment_about.xml
@@ -15,16 +15,14 @@
         android:paddingBottom="@dimen/activity_vertical_margin">
 
         <ImageView
-            android:id="@+id/logo"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center_horizontal"
             android:layout_marginBottom="8dp"
-            android:contentDescription="TODO"
+            android:contentDescription="@string/app_name"
             app:srcCompat="@mipmap/ic_launcher" />
 
         <TextView
-            android:id="@+id/app_name"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center_horizontal"
@@ -33,7 +31,7 @@
 
 
         <TextView
-            android:id="@+id/app_version"
+            android:id="@+id/about_app_version"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center_horizontal"
@@ -42,14 +40,12 @@
             tools:text="0.9.9" />
 
         <TextView
-            android:id="@+id/app_description"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:paddingBottom="5dp"
             android:text="@string/app_description" />
 
         <TextView
-            android:id="@+id/title_contribution"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:paddingTop="10dp"
@@ -62,7 +58,7 @@
             android:text="@string/contribution_encouragement" />
 
         <Button
-            android:id="@+id/github_link"
+            android:id="@+id/about_github_link"
             style="@style/Base.Widget.AppCompat.Button.Borderless"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -70,7 +66,6 @@
             android:text="@string/view_on_github" />
 
         <TextView
-            android:id="@+id/title_donate"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:paddingTop="10dp"
@@ -83,7 +78,7 @@
             android:text="@string/donation_encouragement" />
 
         <Button
-            android:id="@+id/donation_link"
+            android:id="@+id/about_donation_link"
             style="@style/Base.Widget.AppCompat.Button.Borderless"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -91,7 +86,6 @@
             android:text="@string/give_back" />
 
         <TextView
-            android:id="@+id/title_website"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:paddingTop="10dp"
@@ -104,7 +98,7 @@
             android:text="@string/website_encouragement" />
 
         <Button
-            android:id="@+id/website_link"
+            android:id="@+id/about_website_link"
             style="@style/Base.Widget.AppCompat.Button.Borderless"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -112,7 +106,6 @@
             android:text="@string/open_in_browser" />
 
         <TextView
-            android:id="@+id/title_privacy_policy"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:paddingTop="10dp"
@@ -125,7 +118,7 @@
             android:text="@string/privacy_policy_encouragement" />
 
         <Button
-            android:id="@+id/privacy_policy_link"
+            android:id="@+id/about_privacy_policy_link"
             style="@style/Base.Widget.AppCompat.Button.Borderless"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
diff --git a/app/src/main/res/layout/fragment_licenses.xml b/app/src/main/res/layout/fragment_licenses.xml
index 95778431e..8fa727204 100644
--- a/app/src/main/res/layout/fragment_licenses.xml
+++ b/app/src/main/res/layout/fragment_licenses.xml
@@ -12,7 +12,6 @@
         android:paddingBottom="@dimen/activity_vertical_margin">
 
         <TextView
-            android:id="@+id/app_license_title"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_marginLeft="@dimen/activity_horizontal_margin"
@@ -23,7 +22,6 @@
             android:textAppearance="@android:style/TextAppearance.Large" />
 
         <TextView
-            android:id="@+id/app_license"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_marginLeft="@dimen/activity_horizontal_margin"
@@ -31,7 +29,7 @@
             android:text="@string/app_license" />
 
         <Button
-            android:id="@+id/app_read_license"
+            android:id="@+id/licenses_app_read_license"
             style="@style/Base.Widget.AppCompat.Button.Borderless"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -49,7 +47,7 @@
             android:textAppearance="?android:attr/textAppearanceLarge" />
 
         <LinearLayout
-            android:id="@+id/software_components"
+            android:id="@+id/licenses_software_components"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:orientation="vertical" />
diff --git a/app/src/main/res/menu/software_component.xml b/app/src/main/res/menu/software_component.xml
index 8f95a480d..703bdc73a 100644
--- a/app/src/main/res/menu/software_component.xml
+++ b/app/src/main/res/menu/software_component.xml
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
     <item
-        android:id="@+id/action_website"
+        android:id="@+id/menu_software_website"
         android:title="@string/action_open_website" />
     <item
-        android:id="@+id/action_show_license"
-        android:title="@string/read_full_license"></item>
+        android:id="@+id/menu_software_show_license"
+        android:title="@string/read_full_license" />
 </menu>

From fb1aab2a49cb97587496e4deb87fddab79cb051c Mon Sep 17 00:00:00 2001
From: TacoTheDank <SkytkRSfan3895@gmail.com>
Date: Mon, 29 Mar 2021 19:06:32 -0400
Subject: [PATCH 2/3] Converted the about package to Kotlin

---
 .../schabi/newpipe/about/AboutActivity.java   | 192 -----------------
 .../org/schabi/newpipe/about/AboutActivity.kt | 204 ++++++++++++++++++
 .../schabi/newpipe/about/LicenseFragment.java | 145 -------------
 .../schabi/newpipe/about/LicenseFragment.kt   | 131 +++++++++++
 .../newpipe/about/LicenseFragmentHelper.java  | 109 ----------
 .../newpipe/about/LicenseFragmentHelper.kt    | 114 ++++++++++
 .../newpipe/about/StandardLicenses.java       |  19 --
 .../schabi/newpipe/about/StandardLicenses.kt  |  21 ++
 8 files changed, 470 insertions(+), 465 deletions(-)
 delete mode 100644 app/src/main/java/org/schabi/newpipe/about/AboutActivity.java
 create mode 100644 app/src/main/java/org/schabi/newpipe/about/AboutActivity.kt
 delete mode 100644 app/src/main/java/org/schabi/newpipe/about/LicenseFragment.java
 create mode 100644 app/src/main/java/org/schabi/newpipe/about/LicenseFragment.kt
 delete mode 100644 app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.java
 create mode 100644 app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.kt
 delete mode 100644 app/src/main/java/org/schabi/newpipe/about/StandardLicenses.java
 create mode 100644 app/src/main/java/org/schabi/newpipe/about/StandardLicenses.kt

diff --git a/app/src/main/java/org/schabi/newpipe/about/AboutActivity.java b/app/src/main/java/org/schabi/newpipe/about/AboutActivity.java
deleted file mode 100644
index 6db464f64..000000000
--- a/app/src/main/java/org/schabi/newpipe/about/AboutActivity.java
+++ /dev/null
@@ -1,192 +0,0 @@
-package org.schabi.newpipe.about;
-
-import android.content.Context;
-import android.os.Bundle;
-import android.view.LayoutInflater;
-import android.view.MenuItem;
-import android.view.View;
-import android.view.ViewGroup;
-
-import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentActivity;
-import androidx.viewpager2.adapter.FragmentStateAdapter;
-
-import com.google.android.material.tabs.TabLayoutMediator;
-
-import org.schabi.newpipe.BuildConfig;
-import org.schabi.newpipe.R;
-import org.schabi.newpipe.databinding.ActivityAboutBinding;
-import org.schabi.newpipe.databinding.FragmentAboutBinding;
-import org.schabi.newpipe.util.ThemeHelper;
-
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
-import static org.schabi.newpipe.util.ShareUtils.openUrlInBrowser;
-
-public class AboutActivity extends AppCompatActivity {
-    /**
-     * List of all software components.
-     */
-    private static final SoftwareComponent[] SOFTWARE_COMPONENTS = {
-            new SoftwareComponent("ACRA", "2013", "Kevin Gaudin",
-                    "https://github.com/ACRA/acra", StandardLicenses.APACHE2),
-            new SoftwareComponent("AndroidX", "2005 - 2011", "The Android Open Source Project",
-                    "https://developer.android.com/jetpack", StandardLicenses.APACHE2),
-            new SoftwareComponent("CircleImageView", "2014 - 2020", "Henning Dodenhof",
-                    "https://github.com/hdodenhof/CircleImageView",
-                    StandardLicenses.APACHE2),
-            new SoftwareComponent("ExoPlayer", "2014 - 2020", "Google, Inc.",
-                    "https://github.com/google/ExoPlayer", StandardLicenses.APACHE2),
-            new SoftwareComponent("GigaGet", "2014 - 2015", "Peter Cai",
-                    "https://github.com/PaperAirplane-Dev-Team/GigaGet", StandardLicenses.GPL3),
-            new SoftwareComponent("Groupie", "2016", "Lisa Wray",
-                    "https://github.com/lisawray/groupie", StandardLicenses.MIT),
-            new SoftwareComponent("Icepick", "2015", "Frankie Sardo",
-                    "https://github.com/frankiesardo/icepick", StandardLicenses.EPL1),
-            new SoftwareComponent("Jsoup", "2009 - 2020", "Jonathan Hedley",
-                    "https://github.com/jhy/jsoup", StandardLicenses.MIT),
-            new SoftwareComponent("Markwon", "2019", "Dimitry Ivanov",
-                    "https://github.com/noties/Markwon", StandardLicenses.APACHE2),
-            new SoftwareComponent("Material Components for Android", "2016 - 2020", "Google, Inc.",
-                    "https://github.com/material-components/material-components-android",
-                    StandardLicenses.APACHE2),
-            new SoftwareComponent("NewPipe Extractor", "2017 - 2020", "Christian Schabesberger",
-                    "https://github.com/TeamNewPipe/NewPipeExtractor", StandardLicenses.GPL3),
-            new SoftwareComponent("NoNonsense-FilePicker", "2016", "Jonas Kalderstam",
-                    "https://github.com/spacecowboy/NoNonsense-FilePicker",
-                    StandardLicenses.MPL2),
-            new SoftwareComponent("OkHttp", "2019", "Square, Inc.",
-                    "https://square.github.io/okhttp/", StandardLicenses.APACHE2),
-            new SoftwareComponent("PrettyTime", "2012 - 2020", "Lincoln Baxter, III",
-                    "https://github.com/ocpsoft/prettytime", StandardLicenses.APACHE2),
-            new SoftwareComponent("RxAndroid", "2015", "The RxAndroid authors",
-                    "https://github.com/ReactiveX/RxAndroid", StandardLicenses.APACHE2),
-            new SoftwareComponent("RxBinding", "2015", "Jake Wharton",
-                    "https://github.com/JakeWharton/RxBinding", StandardLicenses.APACHE2),
-            new SoftwareComponent("RxJava", "2016 - 2020", "RxJava Contributors",
-                    "https://github.com/ReactiveX/RxJava", StandardLicenses.APACHE2),
-            new SoftwareComponent("Universal Image Loader", "2011 - 2015", "Sergey Tarasevich",
-                    "https://github.com/nostra13/Android-Universal-Image-Loader",
-                    StandardLicenses.APACHE2),
-    };
-
-    private static final int POS_ABOUT = 0;
-    private static final int POS_LICENSE = 1;
-    private static final int TOTAL_COUNT = 2;
-
-    @Override
-    protected void onCreate(final Bundle savedInstanceState) {
-        assureCorrectAppLanguage(this);
-        super.onCreate(savedInstanceState);
-        ThemeHelper.setTheme(this);
-        setTitle(getString(R.string.title_activity_about));
-
-        final ActivityAboutBinding aboutBinding = ActivityAboutBinding.inflate(getLayoutInflater());
-        setContentView(aboutBinding.getRoot());
-
-        setSupportActionBar(aboutBinding.aboutToolbar);
-        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
-        // Create the adapter that will return a fragment for each of the three
-        // primary sections of the activity.
-        final AboutStateAdapter mAboutStateAdapter = new AboutStateAdapter(this);
-
-        // Set up the ViewPager with the sections adapter.
-        aboutBinding.aboutViewPager2.setAdapter(mAboutStateAdapter);
-
-        new TabLayoutMediator(aboutBinding.aboutTabLayout, aboutBinding.aboutViewPager2, (tab, position) -> {
-            switch (position) {
-                default:
-                case POS_ABOUT:
-                    tab.setText(R.string.tab_about);
-                    break;
-                case POS_LICENSE:
-                    tab.setText(R.string.tab_licenses);
-                    break;
-            }
-        }).attach();
-    }
-
-    @Override
-    public boolean onOptionsItemSelected(final MenuItem item) {
-        final int id = item.getItemId();
-
-        switch (id) {
-            case android.R.id.home:
-                finish();
-                return true;
-        }
-
-        return super.onOptionsItemSelected(item);
-    }
-
-    /**
-     * A placeholder fragment containing a simple view.
-     */
-    public static class AboutFragment extends Fragment {
-        public AboutFragment() {
-        }
-
-        /**
-         * Created a new instance of this fragment for the given section number.
-         *
-         * @return New instance of {@link AboutFragment}
-         */
-        public static AboutFragment newInstance() {
-            return new AboutFragment();
-        }
-
-        @Override
-        public View onCreateView(@NonNull final LayoutInflater inflater, final ViewGroup container,
-                                 final Bundle savedInstanceState) {
-            final FragmentAboutBinding aboutBinding =
-                    FragmentAboutBinding.inflate(inflater, container, false);
-            final Context context = getContext();
-
-            aboutBinding.aboutAppVersion.setText(BuildConfig.VERSION_NAME);
-
-            aboutBinding.aboutGithubLink.setOnClickListener(nv ->
-                    openUrlInBrowser(context, context.getString(R.string.github_url), false));
-
-            aboutBinding.aboutDonationLink.setOnClickListener(v ->
-                    openUrlInBrowser(context, context.getString(R.string.donation_url), false));
-
-            aboutBinding.aboutWebsiteLink.setOnClickListener(nv ->
-                    openUrlInBrowser(context, context.getString(R.string.website_url), false));
-
-            aboutBinding.aboutPrivacyPolicyLink.setOnClickListener(v ->
-                    openUrlInBrowser(context, context.getString(R.string.privacy_policy_url),
-                            false));
-
-            return aboutBinding.getRoot();
-        }
-    }
-
-    /**
-     * A {@link FragmentStateAdapter} that returns a fragment corresponding to
-     * one of the sections/tabs/pages.
-     */
-    private static class AboutStateAdapter extends FragmentStateAdapter {
-        AboutStateAdapter(final FragmentActivity fa) {
-            super(fa);
-        }
-
-        @NonNull
-        @Override
-        public Fragment createFragment(final int position) {
-            switch (position) {
-                default:
-                case POS_ABOUT:
-                    return AboutFragment.newInstance();
-                case POS_LICENSE:
-                    return LicenseFragment.newInstance(SOFTWARE_COMPONENTS);
-            }
-        }
-
-        @Override
-        public int getItemCount() {
-            // Show 2 total pages.
-            return TOTAL_COUNT;
-        }
-    }
-}
diff --git a/app/src/main/java/org/schabi/newpipe/about/AboutActivity.kt b/app/src/main/java/org/schabi/newpipe/about/AboutActivity.kt
new file mode 100644
index 000000000..129af3388
--- /dev/null
+++ b/app/src/main/java/org/schabi/newpipe/about/AboutActivity.kt
@@ -0,0 +1,204 @@
+package org.schabi.newpipe.about
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.MenuItem
+import android.view.View
+import android.view.ViewGroup
+import androidx.appcompat.app.AppCompatActivity
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentActivity
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import com.google.android.material.tabs.TabLayout
+import com.google.android.material.tabs.TabLayoutMediator
+import org.schabi.newpipe.BuildConfig
+import org.schabi.newpipe.R
+import org.schabi.newpipe.databinding.ActivityAboutBinding
+import org.schabi.newpipe.databinding.FragmentAboutBinding
+import org.schabi.newpipe.util.Localization
+import org.schabi.newpipe.util.ShareUtils
+import org.schabi.newpipe.util.ThemeHelper
+
+class AboutActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        Localization.assureCorrectAppLanguage(this)
+        super.onCreate(savedInstanceState)
+        ThemeHelper.setTheme(this)
+        title = getString(R.string.title_activity_about)
+        val aboutBinding = ActivityAboutBinding.inflate(layoutInflater)
+        setContentView(aboutBinding.root)
+        setSupportActionBar(aboutBinding.aboutToolbar)
+        supportActionBar!!.setDisplayHomeAsUpEnabled(true)
+        // Create the adapter that will return a fragment for each of the three
+        // primary sections of the activity.
+        val mAboutStateAdapter = AboutStateAdapter(this)
+
+        // Set up the ViewPager with the sections adapter.
+        aboutBinding.aboutViewPager2.adapter = mAboutStateAdapter
+        TabLayoutMediator(
+            aboutBinding.aboutTabLayout,
+            aboutBinding.aboutViewPager2
+        ) { tab: TabLayout.Tab, position: Int ->
+            when (position) {
+                POS_ABOUT -> tab.setText(R.string.tab_about)
+                POS_LICENSE -> tab.setText(R.string.tab_licenses)
+                else -> throw IllegalArgumentException("Unknown position for ViewPager2")
+            }
+        }.attach()
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        if (item.itemId == android.R.id.home) {
+            finish()
+            return true
+        }
+        return super.onOptionsItemSelected(item)
+    }
+
+    /**
+     * A placeholder fragment containing a simple view.
+     */
+    class AboutFragment : Fragment() {
+        override fun onCreateView(
+            inflater: LayoutInflater,
+            container: ViewGroup?,
+            savedInstanceState: Bundle?
+        ): View {
+            val aboutBinding = FragmentAboutBinding.inflate(inflater, container, false)
+            val context = context
+            aboutBinding.aboutAppVersion.text = BuildConfig.VERSION_NAME
+            aboutBinding.aboutGithubLink.setOnClickListener {
+                ShareUtils.openUrlInBrowser(
+                    context,
+                    context!!.getString(R.string.github_url),
+                    false
+                )
+            }
+            aboutBinding.aboutDonationLink.setOnClickListener {
+                ShareUtils.openUrlInBrowser(
+                    context,
+                    context!!.getString(R.string.donation_url),
+                    false
+                )
+            }
+            aboutBinding.aboutWebsiteLink.setOnClickListener {
+                ShareUtils.openUrlInBrowser(
+                    context,
+                    context!!.getString(R.string.website_url),
+                    false
+                )
+            }
+            aboutBinding.aboutPrivacyPolicyLink.setOnClickListener {
+                ShareUtils.openUrlInBrowser(
+                    context, context!!.getString(R.string.privacy_policy_url),
+                    false
+                )
+            }
+            return aboutBinding.root
+        }
+    }
+
+    /**
+     * A [FragmentStateAdapter] that returns a fragment corresponding to
+     * one of the sections/tabs/pages.
+     */
+    private class AboutStateAdapter(fa: FragmentActivity) : FragmentStateAdapter(fa) {
+        override fun createFragment(position: Int): Fragment {
+            return when (position) {
+                POS_ABOUT -> AboutFragment()
+                POS_LICENSE -> LicenseFragment.newInstance(SOFTWARE_COMPONENTS)
+                else -> throw IllegalArgumentException("Unknown position for ViewPager2")
+            }
+        }
+
+        override fun getItemCount(): Int {
+            // Show 2 total pages.
+            return TOTAL_COUNT
+        }
+    }
+
+    companion object {
+        /**
+         * List of all software components.
+         */
+        private val SOFTWARE_COMPONENTS = arrayOf(
+            SoftwareComponent(
+                "ACRA", "2013", "Kevin Gaudin",
+                "https://github.com/ACRA/acra", StandardLicenses.APACHE2
+            ),
+            SoftwareComponent(
+                "AndroidX", "2005 - 2011", "The Android Open Source Project",
+                "https://developer.android.com/jetpack", StandardLicenses.APACHE2
+            ),
+            SoftwareComponent(
+                "CircleImageView", "2014 - 2020", "Henning Dodenhof",
+                "https://github.com/hdodenhof/CircleImageView", StandardLicenses.APACHE2
+            ),
+            SoftwareComponent(
+                "ExoPlayer", "2014 - 2020", "Google, Inc.",
+                "https://github.com/google/ExoPlayer", StandardLicenses.APACHE2
+            ),
+            SoftwareComponent(
+                "GigaGet", "2014 - 2015", "Peter Cai",
+                "https://github.com/PaperAirplane-Dev-Team/GigaGet", StandardLicenses.GPL3
+            ),
+            SoftwareComponent(
+                "Groupie", "2016", "Lisa Wray",
+                "https://github.com/lisawray/groupie", StandardLicenses.MIT
+            ),
+            SoftwareComponent(
+                "Icepick", "2015", "Frankie Sardo",
+                "https://github.com/frankiesardo/icepick", StandardLicenses.EPL1
+            ),
+            SoftwareComponent(
+                "Jsoup", "2009 - 2020", "Jonathan Hedley",
+                "https://github.com/jhy/jsoup", StandardLicenses.MIT
+            ),
+            SoftwareComponent(
+                "Markwon", "2019", "Dimitry Ivanov",
+                "https://github.com/noties/Markwon", StandardLicenses.APACHE2
+            ),
+            SoftwareComponent(
+                "Material Components for Android", "2016 - 2020", "Google, Inc.",
+                "https://github.com/material-components/material-components-android",
+                StandardLicenses.APACHE2
+            ),
+            SoftwareComponent(
+                "NewPipe Extractor", "2017 - 2020", "Christian Schabesberger",
+                "https://github.com/TeamNewPipe/NewPipeExtractor", StandardLicenses.GPL3
+            ),
+            SoftwareComponent(
+                "NoNonsense-FilePicker", "2016", "Jonas Kalderstam",
+                "https://github.com/spacecowboy/NoNonsense-FilePicker", StandardLicenses.MPL2
+            ),
+            SoftwareComponent(
+                "OkHttp", "2019", "Square, Inc.",
+                "https://square.github.io/okhttp/", StandardLicenses.APACHE2
+            ),
+            SoftwareComponent(
+                "PrettyTime", "2012 - 2020", "Lincoln Baxter, III",
+                "https://github.com/ocpsoft/prettytime", StandardLicenses.APACHE2
+            ),
+            SoftwareComponent(
+                "RxAndroid", "2015", "The RxAndroid authors",
+                "https://github.com/ReactiveX/RxAndroid", StandardLicenses.APACHE2
+            ),
+            SoftwareComponent(
+                "RxBinding", "2015", "Jake Wharton",
+                "https://github.com/JakeWharton/RxBinding", StandardLicenses.APACHE2
+            ),
+            SoftwareComponent(
+                "RxJava", "2016 - 2020", "RxJava Contributors",
+                "https://github.com/ReactiveX/RxJava", StandardLicenses.APACHE2
+            ),
+            SoftwareComponent(
+                "Universal Image Loader", "2011 - 2015", "Sergey Tarasevich",
+                "https://github.com/nostra13/Android-Universal-Image-Loader",
+                StandardLicenses.APACHE2
+            )
+        )
+        private const val POS_ABOUT = 0
+        private const val POS_LICENSE = 1
+        private const val TOTAL_COUNT = 2
+    }
+}
diff --git a/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.java b/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.java
deleted file mode 100644
index 822161806..000000000
--- a/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.java
+++ /dev/null
@@ -1,145 +0,0 @@
-package org.schabi.newpipe.about;
-
-import android.os.Bundle;
-import android.view.ContextMenu;
-import android.view.LayoutInflater;
-import android.view.MenuInflater;
-import android.view.MenuItem;
-import android.view.View;
-import android.view.ViewGroup;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.fragment.app.Fragment;
-
-import org.schabi.newpipe.R;
-import org.schabi.newpipe.databinding.FragmentLicensesBinding;
-import org.schabi.newpipe.databinding.ItemSoftwareComponentBinding;
-import org.schabi.newpipe.util.ShareUtils;
-
-import java.io.Serializable;
-import java.util.Arrays;
-import java.util.Comparator;
-import java.util.Objects;
-
-import io.reactivex.rxjava3.disposables.CompositeDisposable;
-
-/**
- * Fragment containing the software licenses.
- */
-public class LicenseFragment extends Fragment {
-    private static final String ARG_COMPONENTS = "components";
-    private static final String LICENSE_KEY = "ACTIVE_LICENSE";
-
-    private SoftwareComponent[] softwareComponents;
-    private SoftwareComponent componentForContextMenu;
-    private License activeLicense;
-    private final CompositeDisposable compositeDisposable = new CompositeDisposable();
-
-    public static LicenseFragment newInstance(final SoftwareComponent[] softwareComponents) {
-        final Bundle bundle = new Bundle();
-        bundle.putParcelableArray(ARG_COMPONENTS, Objects.requireNonNull(softwareComponents));
-        final LicenseFragment fragment = new LicenseFragment();
-        fragment.setArguments(bundle);
-        return fragment;
-    }
-
-    @Override
-    public void onCreate(@Nullable final Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        softwareComponents = (SoftwareComponent[]) getArguments()
-                .getParcelableArray(ARG_COMPONENTS);
-
-        if (savedInstanceState != null) {
-            final Serializable license = savedInstanceState.getSerializable(LICENSE_KEY);
-            if (license != null) {
-                activeLicense = (License) license;
-            }
-        }
-        // Sort components by name
-        Arrays.sort(softwareComponents, Comparator.comparing(SoftwareComponent::getName));
-    }
-
-    @Override
-    public void onDestroy() {
-        compositeDisposable.dispose();
-        super.onDestroy();
-    }
-
-    @Nullable
-    @Override
-    public View onCreateView(@NonNull final LayoutInflater inflater,
-                             @Nullable final ViewGroup container,
-                             @Nullable final Bundle savedInstanceState) {
-        final FragmentLicensesBinding binding = FragmentLicensesBinding
-                .inflate(inflater, container, false);
-
-        binding.licensesAppReadLicense.setOnClickListener(v -> {
-            activeLicense = StandardLicenses.GPL3;
-            compositeDisposable.add(LicenseFragmentHelper.showLicense(getActivity(),
-                    StandardLicenses.GPL3));
-        });
-
-        for (final SoftwareComponent component : softwareComponents) {
-            final ItemSoftwareComponentBinding componentBinding = ItemSoftwareComponentBinding
-                    .inflate(inflater, container, false);
-            componentBinding.name.setText(component.getName());
-            componentBinding.copyright.setText(getString(R.string.copyright,
-                    component.getYears(),
-                    component.getCopyrightOwner(),
-                    component.getLicense().getAbbreviation()));
-
-            final View root = componentBinding.getRoot();
-            root.setTag(component);
-            root.setOnClickListener(v -> {
-                activeLicense = component.getLicense();
-                compositeDisposable.add(LicenseFragmentHelper.showLicense(getActivity(),
-                        component.getLicense()));
-            });
-            binding.licensesSoftwareComponents.addView(root);
-            registerForContextMenu(root);
-        }
-        if (activeLicense != null) {
-            compositeDisposable.add(LicenseFragmentHelper.showLicense(getActivity(),
-                    activeLicense));
-        }
-        return binding.getRoot();
-    }
-
-    @Override
-    public void onCreateContextMenu(final ContextMenu menu, final View v,
-                                    final ContextMenu.ContextMenuInfo menuInfo) {
-        final MenuInflater inflater = getActivity().getMenuInflater();
-        final SoftwareComponent component = (SoftwareComponent) v.getTag();
-        menu.setHeaderTitle(component.getName());
-        inflater.inflate(R.menu.software_component, menu);
-        super.onCreateContextMenu(menu, v, menuInfo);
-        componentForContextMenu = (SoftwareComponent) v.getTag();
-    }
-
-    @Override
-    public boolean onContextItemSelected(@NonNull final MenuItem item) {
-        // item.getMenuInfo() is null so we use the tag of the view
-        final SoftwareComponent component = componentForContextMenu;
-        if (component == null) {
-            return false;
-        }
-        switch (item.getItemId()) {
-            case R.id.menu_software_website:
-                ShareUtils.openUrlInBrowser(getActivity(), component.getLink());
-                return true;
-            case R.id.menu_software_show_license:
-                compositeDisposable.add(LicenseFragmentHelper.showLicense(getActivity(),
-                        component.getLicense()));
-        }
-        return false;
-    }
-
-    @Override
-    public void onSaveInstanceState(@NonNull final Bundle savedInstanceState) {
-        super.onSaveInstanceState(savedInstanceState);
-        if (activeLicense != null) {
-            savedInstanceState.putSerializable(LICENSE_KEY, activeLicense);
-        }
-    }
-}
diff --git a/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.kt b/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.kt
new file mode 100644
index 000000000..d72ecf894
--- /dev/null
+++ b/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.kt
@@ -0,0 +1,131 @@
+package org.schabi.newpipe.about
+
+import android.os.Bundle
+import android.view.ContextMenu
+import android.view.ContextMenu.ContextMenuInfo
+import android.view.LayoutInflater
+import android.view.MenuItem
+import android.view.View
+import android.view.ViewGroup
+import androidx.core.os.bundleOf
+import androidx.fragment.app.Fragment
+import io.reactivex.rxjava3.disposables.CompositeDisposable
+import org.schabi.newpipe.R
+import org.schabi.newpipe.about.LicenseFragmentHelper.showLicense
+import org.schabi.newpipe.databinding.FragmentLicensesBinding
+import org.schabi.newpipe.databinding.ItemSoftwareComponentBinding
+import org.schabi.newpipe.util.ShareUtils
+import java.util.Arrays
+import java.util.Objects
+
+/**
+ * Fragment containing the software licenses.
+ */
+class LicenseFragment : Fragment() {
+    private lateinit var softwareComponents: Array<SoftwareComponent>
+    private var componentForContextMenu: SoftwareComponent? = null
+    private var activeLicense: License? = null
+    private val compositeDisposable = CompositeDisposable()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        softwareComponents =
+            arguments?.getParcelableArray(ARG_COMPONENTS) as Array<SoftwareComponent>
+        if (savedInstanceState != null) {
+            val license = savedInstanceState.getSerializable(LICENSE_KEY)
+            if (license != null) {
+                activeLicense = license as License?
+            }
+        }
+        // Sort components by name
+        Arrays.sort(softwareComponents, Comparator.comparing(SoftwareComponent::name))
+    }
+
+    override fun onDestroy() {
+        compositeDisposable.dispose()
+        super.onDestroy()
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        val binding = FragmentLicensesBinding.inflate(inflater, container, false)
+        binding.licensesAppReadLicense.setOnClickListener {
+            activeLicense = StandardLicenses.GPL3
+            compositeDisposable.add(
+                showLicense(activity, StandardLicenses.GPL3)
+            )
+        }
+        for (component in softwareComponents) {
+            val componentBinding = ItemSoftwareComponentBinding
+                .inflate(inflater, container, false)
+            componentBinding.name.text = component.name
+            componentBinding.copyright.text = getString(
+                R.string.copyright,
+                component.years,
+                component.copyrightOwner,
+                component.license.abbreviation
+            )
+            val root: View = componentBinding.root
+            root.tag = component
+            root.setOnClickListener {
+                activeLicense = component.license
+                compositeDisposable.add(
+                    showLicense(activity, component.license)
+                )
+            }
+            binding.licensesSoftwareComponents.addView(root)
+            registerForContextMenu(root)
+        }
+        if (activeLicense != null) {
+            compositeDisposable.add(
+                showLicense(activity, activeLicense!!)
+            )
+        }
+        return binding.root
+    }
+
+    override fun onCreateContextMenu(menu: ContextMenu, v: View, menuInfo: ContextMenuInfo?) {
+        val inflater = requireActivity().menuInflater
+        val component = v.tag as SoftwareComponent
+        menu.setHeaderTitle(component.name)
+        inflater.inflate(R.menu.software_component, menu)
+        super.onCreateContextMenu(menu, v, menuInfo)
+        componentForContextMenu = component
+    }
+
+    override fun onContextItemSelected(item: MenuItem): Boolean {
+        // item.getMenuInfo() is null so we use the tag of the view
+        val component = componentForContextMenu ?: return false
+        when (item.itemId) {
+            R.id.menu_software_website -> {
+                ShareUtils.openUrlInBrowser(activity, component.link)
+                return true
+            }
+            R.id.menu_software_show_license -> compositeDisposable.add(
+                showLicense(activity, component.license)
+            )
+        }
+        return false
+    }
+
+    override fun onSaveInstanceState(savedInstanceState: Bundle) {
+        super.onSaveInstanceState(savedInstanceState)
+        if (activeLicense != null) {
+            savedInstanceState.putSerializable(LICENSE_KEY, activeLicense)
+        }
+    }
+
+    companion object {
+        private const val ARG_COMPONENTS = "components"
+        private const val LICENSE_KEY = "ACTIVE_LICENSE"
+        fun newInstance(softwareComponents: Array<SoftwareComponent>): LicenseFragment {
+            val fragment = LicenseFragment()
+            fragment.arguments =
+                bundleOf(ARG_COMPONENTS to Objects.requireNonNull(softwareComponents))
+            return fragment
+        }
+    }
+}
diff --git a/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.java b/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.java
deleted file mode 100644
index b0241049d..000000000
--- a/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.java
+++ /dev/null
@@ -1,109 +0,0 @@
-package org.schabi.newpipe.about;
-
-import android.content.Context;
-import android.util.Base64;
-import android.webkit.WebView;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.appcompat.app.AlertDialog;
-
-import org.schabi.newpipe.R;
-import org.schabi.newpipe.util.ThemeHelper;
-
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.nio.charset.StandardCharsets;
-
-import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
-import io.reactivex.rxjava3.core.Observable;
-import io.reactivex.rxjava3.disposables.Disposable;
-import io.reactivex.rxjava3.schedulers.Schedulers;
-
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
-
-public final class LicenseFragmentHelper {
-    private LicenseFragmentHelper() { }
-
-    /**
-     * @param context the context to use
-     * @param license the license
-     * @return String which contains a HTML formatted license page
-     * styled according to the context's theme
-     */
-    private static String getFormattedLicense(@NonNull final Context context,
-                                              @NonNull final License license) {
-        final StringBuilder licenseContent = new StringBuilder();
-        final String webViewData;
-        try (BufferedReader in = new BufferedReader(new InputStreamReader(
-                context.getAssets().open(license.getFilename()), StandardCharsets.UTF_8))) {
-            String str;
-            while ((str = in.readLine()) != null) {
-                licenseContent.append(str);
-            }
-
-            // split the HTML file and insert the stylesheet into the HEAD of the file
-            webViewData = licenseContent.toString().replace("</head>",
-                    "<style>" + getLicenseStylesheet(context) + "</style></head>");
-        } catch (final IOException e) {
-            throw new IllegalArgumentException(
-                    "Could not get license file: " + license.getFilename(), e);
-        }
-        return webViewData;
-    }
-
-    /**
-     * @param context the Android context
-     * @return String which is a CSS stylesheet according to the context's theme
-     */
-    private static String getLicenseStylesheet(@NonNull final Context context) {
-        final boolean isLightTheme = ThemeHelper.isLightThemeSelected(context);
-        return "body{padding:12px 15px;margin:0;"
-                + "background:#" + getHexRGBColor(context, isLightTheme
-                ? R.color.light_license_background_color
-                : R.color.dark_license_background_color) + ";"
-                + "color:#" + getHexRGBColor(context, isLightTheme
-                ? R.color.light_license_text_color
-                : R.color.dark_license_text_color) + "}"
-                + "a[href]{color:#" + getHexRGBColor(context, isLightTheme
-                ? R.color.light_youtube_primary_color
-                : R.color.dark_youtube_primary_color) + "}"
-                + "pre{white-space:pre-wrap}";
-    }
-
-    /**
-     * Cast R.color to a hexadecimal color value.
-     *
-     * @param context the context to use
-     * @param color   the color number from R.color
-     * @return a six characters long String with hexadecimal RGB values
-     */
-    private static String getHexRGBColor(@NonNull final Context context, final int color) {
-        return context.getResources().getString(color).substring(3);
-    }
-
-    static Disposable showLicense(@Nullable final Context context, @NonNull final License license) {
-        if (context == null) {
-            return Disposable.empty();
-        }
-
-        return Observable.fromCallable(() -> getFormattedLicense(context, license))
-                .subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(formattedLicense -> {
-                    final String webViewData = Base64.encodeToString(formattedLicense
-                            .getBytes(StandardCharsets.UTF_8), Base64.NO_PADDING);
-                    final WebView webView = new WebView(context);
-                    webView.loadData(webViewData, "text/html; charset=UTF-8", "base64");
-
-                    final AlertDialog.Builder alert = new AlertDialog.Builder(context);
-                    alert.setTitle(license.getName());
-                    alert.setView(webView);
-                    assureCorrectAppLanguage(context);
-                    alert.setNegativeButton(context.getString(R.string.finish),
-                            (dialog, which) -> dialog.dismiss());
-                    alert.show();
-                });
-    }
-}
diff --git a/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.kt b/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.kt
new file mode 100644
index 000000000..89e356a42
--- /dev/null
+++ b/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.kt
@@ -0,0 +1,114 @@
+package org.schabi.newpipe.about
+
+import android.content.Context
+import android.util.Base64
+import android.webkit.WebView
+import androidx.appcompat.app.AlertDialog
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
+import io.reactivex.rxjava3.core.Observable
+import io.reactivex.rxjava3.disposables.Disposable
+import io.reactivex.rxjava3.schedulers.Schedulers
+import org.schabi.newpipe.R
+import org.schabi.newpipe.util.Localization
+import org.schabi.newpipe.util.ThemeHelper
+import java.io.BufferedReader
+import java.io.IOException
+import java.io.InputStreamReader
+import java.nio.charset.StandardCharsets
+
+object LicenseFragmentHelper {
+    /**
+     * @param context the context to use
+     * @param license the license
+     * @return String which contains a HTML formatted license page
+     * styled according to the context's theme
+     */
+    private fun getFormattedLicense(context: Context, license: License): String {
+        val licenseContent = StringBuilder()
+        val webViewData: String
+        try {
+            BufferedReader(
+                InputStreamReader(
+                    context.assets.open(license.filename),
+                    StandardCharsets.UTF_8
+                )
+            ).use { `in` ->
+                var str: String?
+                while (`in`.readLine().also { str = it } != null) {
+                    licenseContent.append(str)
+                }
+
+                // split the HTML file and insert the stylesheet into the HEAD of the file
+                webViewData = "$licenseContent".replace(
+                    "</head>",
+                    "<style>" + getLicenseStylesheet(context) + "</style></head>"
+                )
+            }
+        } catch (e: IOException) {
+            throw IllegalArgumentException(
+                "Could not get license file: " + license.filename, e
+            )
+        }
+        return webViewData
+    }
+
+    /**
+     * @param context the Android context
+     * @return String which is a CSS stylesheet according to the context's theme
+     */
+    private fun getLicenseStylesheet(context: Context): String {
+        val isLightTheme = ThemeHelper.isLightThemeSelected(context)
+        return ("body{padding:12px 15px;margin:0;" + "background:#" + getHexRGBColor(
+            context,
+            if (isLightTheme) R.color.light_license_background_color
+            else R.color.dark_license_background_color
+        ) + ";" + "color:#" + getHexRGBColor(
+            context,
+            if (isLightTheme) R.color.light_license_text_color
+            else R.color.dark_license_text_color
+        ) + "}" + "a[href]{color:#" + getHexRGBColor(
+            context,
+            if (isLightTheme) R.color.light_youtube_primary_color
+            else R.color.dark_youtube_primary_color
+        ) + "}" + "pre{white-space:pre-wrap}")
+    }
+
+    /**
+     * Cast R.color to a hexadecimal color value.
+     *
+     * @param context the context to use
+     * @param color   the color number from R.color
+     * @return a six characters long String with hexadecimal RGB values
+     */
+    private fun getHexRGBColor(context: Context, color: Int): String {
+        return context.getString(color).substring(3)
+    }
+
+    @JvmStatic
+    fun showLicense(context: Context?, license: License): Disposable {
+        return if (context == null) {
+            Disposable.empty()
+        } else {
+            Observable.fromCallable { getFormattedLicense(context, license) }
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe { formattedLicense: String ->
+                    val webViewData = Base64.encodeToString(
+                        formattedLicense
+                            .toByteArray(StandardCharsets.UTF_8),
+                        Base64.NO_PADDING
+                    )
+                    val webView = WebView(context)
+                    webView.loadData(webViewData, "text/html; charset=UTF-8", "base64")
+                    val alert = AlertDialog.Builder(context)
+                    alert.setTitle(license.name)
+                    alert.setView(webView)
+                    Localization.assureCorrectAppLanguage(context)
+                    alert.setNegativeButton(
+                        context.getString(R.string.finish)
+                    ) { dialog, _ -> dialog.dismiss() }
+                    alert.show()
+                }
+        }
+    }
+}
diff --git a/app/src/main/java/org/schabi/newpipe/about/StandardLicenses.java b/app/src/main/java/org/schabi/newpipe/about/StandardLicenses.java
deleted file mode 100644
index 60b1e168c..000000000
--- a/app/src/main/java/org/schabi/newpipe/about/StandardLicenses.java
+++ /dev/null
@@ -1,19 +0,0 @@
-package org.schabi.newpipe.about;
-
-/**
- * Class containing information about standard software licenses.
- */
-public final class StandardLicenses {
-    public static final License GPL3
-            = new License("GNU General Public License, Version 3.0", "GPLv3", "gpl_3.html");
-    public static final License APACHE2
-            = new License("Apache License, Version 2.0", "ALv2", "apache2.html");
-    public static final License MPL2
-            = new License("Mozilla Public License, Version 2.0", "MPL 2.0", "mpl2.html");
-    public static final License MIT
-            = new License("MIT License", "MIT", "mit.html");
-    public static final License EPL1
-            = new License("Eclipse Public License, Version 1.0", "EPL 1.0", "epl1.html");
-
-    private StandardLicenses() { }
-}
diff --git a/app/src/main/java/org/schabi/newpipe/about/StandardLicenses.kt b/app/src/main/java/org/schabi/newpipe/about/StandardLicenses.kt
new file mode 100644
index 000000000..c5b9618fe
--- /dev/null
+++ b/app/src/main/java/org/schabi/newpipe/about/StandardLicenses.kt
@@ -0,0 +1,21 @@
+package org.schabi.newpipe.about
+
+/**
+ * Class containing information about standard software licenses.
+ */
+object StandardLicenses {
+    @JvmField
+    val GPL3 = License("GNU General Public License, Version 3.0", "GPLv3", "gpl_3.html")
+
+    @JvmField
+    val APACHE2 = License("Apache License, Version 2.0", "ALv2", "apache2.html")
+
+    @JvmField
+    val MPL2 = License("Mozilla Public License, Version 2.0", "MPL 2.0", "mpl2.html")
+
+    @JvmField
+    val MIT = License("MIT License", "MIT", "mit.html")
+
+    @JvmField
+    val EPL1 = License("Eclipse Public License, Version 1.0", "EPL 1.0", "epl1.html")
+}

From 27d0f7f2772329e5a240d27175a4ac1610af2193 Mon Sep 17 00:00:00 2001
From: TacoTheDank <SkytkRSfan3895@gmail.com>
Date: Mon, 29 Mar 2021 19:07:12 -0400
Subject: [PATCH 3/3] Convert AboutFragment clickListeners to a function
 extension

---
 .../org/schabi/newpipe/about/AboutActivity.kt | 43 +++++++------------
 1 file changed, 15 insertions(+), 28 deletions(-)

diff --git a/app/src/main/java/org/schabi/newpipe/about/AboutActivity.kt b/app/src/main/java/org/schabi/newpipe/about/AboutActivity.kt
index 129af3388..2f015a049 100644
--- a/app/src/main/java/org/schabi/newpipe/about/AboutActivity.kt
+++ b/app/src/main/java/org/schabi/newpipe/about/AboutActivity.kt
@@ -5,6 +5,7 @@ import android.view.LayoutInflater
 import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
+import android.widget.Button
 import androidx.appcompat.app.AppCompatActivity
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentActivity
@@ -59,41 +60,27 @@ class AboutActivity : AppCompatActivity() {
      * A placeholder fragment containing a simple view.
      */
     class AboutFragment : Fragment() {
+        private fun Button.openLink(url: Int) {
+            setOnClickListener {
+                ShareUtils.openUrlInBrowser(
+                    context,
+                    requireContext().getString(url),
+                    false
+                )
+            }
+        }
+
         override fun onCreateView(
             inflater: LayoutInflater,
             container: ViewGroup?,
             savedInstanceState: Bundle?
         ): View {
             val aboutBinding = FragmentAboutBinding.inflate(inflater, container, false)
-            val context = context
             aboutBinding.aboutAppVersion.text = BuildConfig.VERSION_NAME
-            aboutBinding.aboutGithubLink.setOnClickListener {
-                ShareUtils.openUrlInBrowser(
-                    context,
-                    context!!.getString(R.string.github_url),
-                    false
-                )
-            }
-            aboutBinding.aboutDonationLink.setOnClickListener {
-                ShareUtils.openUrlInBrowser(
-                    context,
-                    context!!.getString(R.string.donation_url),
-                    false
-                )
-            }
-            aboutBinding.aboutWebsiteLink.setOnClickListener {
-                ShareUtils.openUrlInBrowser(
-                    context,
-                    context!!.getString(R.string.website_url),
-                    false
-                )
-            }
-            aboutBinding.aboutPrivacyPolicyLink.setOnClickListener {
-                ShareUtils.openUrlInBrowser(
-                    context, context!!.getString(R.string.privacy_policy_url),
-                    false
-                )
-            }
+            aboutBinding.aboutGithubLink.openLink(R.string.github_url)
+            aboutBinding.aboutDonationLink.openLink(R.string.donation_url)
+            aboutBinding.aboutWebsiteLink.openLink(R.string.website_url)
+            aboutBinding.aboutPrivacyPolicyLink.openLink(R.string.privacy_policy_url)
             return aboutBinding.root
         }
     }