Use the Kotlin Parcelize annotation.

app/src/androidTest/java/org/schabi/newpipe/report/ErrorInfoTest.java

@@ -8,7 +8,6 @@
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.schabi.newpipe.R;
-import org.schabi.newpipe.report.ErrorActivity.ErrorInfo;
 
 import static org.junit.Assert.assertEquals;
 
@@ -29,10 +28,10 @@ public void errorInfoTestParcelable() {
         parcel.setDataPosition(0);
         final ErrorInfo infoFromParcel = ErrorInfo.CREATOR.createFromParcel(parcel);
 
-        assertEquals(UserAction.USER_REPORT, infoFromParcel.userAction);
-        assertEquals("youtube", infoFromParcel.serviceName);
-        assertEquals("request", infoFromParcel.request);
-        assertEquals(R.string.general_error, infoFromParcel.message);
+        assertEquals(UserAction.USER_REPORT, infoFromParcel.getUserAction());
+        assertEquals("youtube", infoFromParcel.getServiceName());
+        assertEquals("request", infoFromParcel.getRequest());
+        assertEquals(R.string.general_error, infoFromParcel.getMessage());
 
         parcel.recycle();
     }

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

@@ -22,6 +22,7 @@
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.downloader.Downloader;
 import org.schabi.newpipe.report.ErrorActivity;
+import org.schabi.newpipe.report.ErrorInfo;
 import org.schabi.newpipe.report.UserAction;
 import org.schabi.newpipe.settings.SettingsActivity;
 import org.schabi.newpipe.util.ExceptionUtils;
@@ -226,7 +227,7 @@ protected void initACRA() {
                     ace,
                     null,
                     null,
-                    ErrorActivity.ErrorInfo.make(UserAction.SOMETHING_ELSE, "none",
+                    ErrorInfo.make(UserAction.SOMETHING_ELSE, "none",
                             "Could not initialize ACRA crash report", R.string.app_ui_crash));
         }
     }

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

@@ -23,6 +23,7 @@
 
 import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
 import org.schabi.newpipe.report.ErrorActivity;
+import org.schabi.newpipe.report.ErrorInfo;
 import org.schabi.newpipe.report.UserAction;
 
 import java.io.ByteArrayInputStream;
@@ -67,7 +68,7 @@ private static String getCertificateSHA1Fingerprint(@NonNull final Application a
             packageInfo = pm.getPackageInfo(packageName, flags);
         } catch (final PackageManager.NameNotFoundException e) {
             ErrorActivity.reportError(application, e, null, null,
-                    ErrorActivity.ErrorInfo.make(UserAction.SOMETHING_ELSE, "none",
+                    ErrorInfo.make(UserAction.SOMETHING_ELSE, "none",
                             "Could not find package info", R.string.app_ui_crash));
         }
 
@@ -82,7 +83,7 @@ private static String getCertificateSHA1Fingerprint(@NonNull final Application a
             c = (X509Certificate) cf.generateCertificate(input);
         } catch (final CertificateException e) {
             ErrorActivity.reportError(application, e, null, null,
-                    ErrorActivity.ErrorInfo.make(UserAction.SOMETHING_ELSE, "none",
+                    ErrorInfo.make(UserAction.SOMETHING_ELSE, "none",
                             "Certificate error", R.string.app_ui_crash));
         }
 
@@ -94,7 +95,7 @@ private static String getCertificateSHA1Fingerprint(@NonNull final Application a
             hexString = byte2HexFormatted(publicKey);
         } catch (NoSuchAlgorithmException | CertificateEncodingException e) {
             ErrorActivity.reportError(application, e, null, null,
-                    ErrorActivity.ErrorInfo.make(UserAction.SOMETHING_ELSE, "none",
+                    ErrorInfo.make(UserAction.SOMETHING_ELSE, "none",
                             "Could not retrieve SHA1 key", R.string.app_ui_crash));
         }
 

app/src/main/java/org/schabi/newpipe/about/License.kt

@@ -0,0 +1,19 @@
+package org.schabi.newpipe.about
+
+import android.net.Uri
+import android.os.Parcelable
+import java.io.Serializable
+import kotlinx.android.parcel.Parcelize
+
+/**
+ * Class for storing information about a software license.
+ */
+@Parcelize
+class License(val name: String, val abbreviation: String, val filename: String) : Parcelable, Serializable {
+    val contentUri: Uri
+        get() = Uri.Builder()
+                .scheme("file")
+                .path("/android_asset")
+                .appendPath(filename)
+                .build()
+}

app/src/main/java/org/schabi/newpipe/about/SoftwareComponent.kt

@@ -0,0 +1,16 @@
+package org.schabi.newpipe.about
+
+import android.os.Parcelable
+import kotlinx.android.parcel.Parcelize
+
+@Parcelize
+class SoftwareComponent
+@JvmOverloads
+constructor(
+    val name: String,
+    val years: String,
+    val copyrightOwner: String,
+    val link: String,
+    val license: License,
+    val version: String? = null
+) : Parcelable

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

@@ -49,6 +49,7 @@
 import org.schabi.newpipe.extractor.stream.SubtitlesStream;
 import org.schabi.newpipe.extractor.stream.VideoStream;
 import org.schabi.newpipe.report.ErrorActivity;
+import org.schabi.newpipe.report.ErrorInfo;
 import org.schabi.newpipe.report.UserAction;
 import org.schabi.newpipe.settings.NewPipeSettings;
 import org.schabi.newpipe.util.FilePickerActivityHelper;
@@ -602,7 +603,7 @@ private void showErrorActivity(final Exception e) {
                 Collections.singletonList(e),
                 null,
                 null,
-                ErrorActivity.ErrorInfo
+                ErrorInfo
                         .make(UserAction.SOMETHING_ELSE, "-", "-", R.string.general_error)
         );
     }

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

@@ -23,6 +23,7 @@
 import org.schabi.newpipe.extractor.exceptions.ContentNotSupportedException;
 import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
 import org.schabi.newpipe.report.ErrorActivity;
+import org.schabi.newpipe.report.ErrorInfo;
 import org.schabi.newpipe.report.UserAction;
 import org.schabi.newpipe.util.ExceptionUtils;
 import org.schabi.newpipe.util.InfoCache;
@@ -252,7 +253,7 @@ public void onUnrecoverableError(final List<Throwable> exception, final UserActi
         }
 
         ErrorActivity.reportError(getContext(), exception, MainActivity.class, null,
-                ErrorActivity.ErrorInfo.make(userAction, serviceName == null ? "none" : serviceName,
+                ErrorInfo.make(userAction, serviceName == null ? "none" : serviceName,
                         request == null ? "none" : request, errorId));
     }
 
@@ -265,7 +266,7 @@ public void showSnackBarError(final Throwable exception, final UserAction userAc
 
     /**
      * Show a SnackBar and only call
-     * {@link ErrorActivity#reportError(Context, List, Class, View, ErrorActivity.ErrorInfo)}
+     * {@link ErrorActivity#reportError(Context, List, Class, View, ErrorInfo)}
      * IF we a find a valid view (otherwise the error screen appears).
      *
      * @param exception List of the exceptions to show
@@ -291,6 +292,6 @@ public void showSnackBarError(final List<Throwable> exception, final UserAction
         }
 
         ErrorActivity.reportError(getContext(), exception, MainActivity.class, rootView,
-                ErrorActivity.ErrorInfo.make(userAction, serviceName, request, errorId));
+                ErrorInfo.make(userAction, serviceName, request, errorId));
     }
 }

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

@@ -27,6 +27,7 @@
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.report.ErrorActivity;
+import org.schabi.newpipe.report.ErrorInfo;
 import org.schabi.newpipe.report.UserAction;
 import org.schabi.newpipe.settings.tabs.Tab;
 import org.schabi.newpipe.settings.tabs.TabsManager;
@@ -242,7 +243,7 @@ public Fragment getItem(final int position) {
             }
 
             if (throwable != null) {
-                ErrorActivity.reportError(context, throwable, null, null, ErrorActivity.ErrorInfo
+                ErrorActivity.reportError(context, throwable, null, null, ErrorInfo
                         .make(UserAction.UI_ERROR, "none", "", R.string.app_ui_crash));
                 return new BlankFragment();
             }

app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java

@@ -92,6 +92,7 @@
 import org.schabi.newpipe.player.playqueue.PlayQueueItem;
 import org.schabi.newpipe.player.playqueue.SinglePlayQueue;
 import org.schabi.newpipe.report.ErrorActivity;
+import org.schabi.newpipe.report.ErrorInfo;
 import org.schabi.newpipe.report.UserAction;
 import org.schabi.newpipe.util.Constants;
 import org.schabi.newpipe.util.DeviceUtils;
@@ -1630,7 +1631,7 @@ public void openDownloadDialog() {
 
             downloadDialog.show(activity.getSupportFragmentManager(), "downloadDialog");
         } catch (final Exception e) {
-            final ErrorActivity.ErrorInfo info = ErrorActivity.ErrorInfo.make(UserAction.UI_ERROR,
+            final ErrorInfo info = ErrorInfo.make(UserAction.UI_ERROR,
                     ServiceList.all()
                             .get(currentInfo
                                     .getServiceId())

app/src/main/java/org/schabi/newpipe/fragments/list/BaseListFragment.java

@@ -48,7 +48,7 @@ public abstract class BaseListFragment<I, N> extends BaseStateFragment<I>
         implements ListViewContract<I, N>, StateSaver.WriteRead,
         SharedPreferences.OnSharedPreferenceChangeListener {
     private static final int LIST_MODE_UPDATE_FLAG = 0x32;
-    protected StateSaver.SavedState savedState;
+    protected org.schabi.newpipe.util.SavedState savedState;
 
     private boolean useDefaultStateSaving = true;
     private int updateFlags = 0;

app/src/main/java/org/schabi/newpipe/fragments/list/search/SearchFragment.java

@@ -49,6 +49,7 @@
 import org.schabi.newpipe.fragments.list.BaseListFragment;
 import org.schabi.newpipe.local.history.HistoryRecordManager;
 import org.schabi.newpipe.report.ErrorActivity;
+import org.schabi.newpipe.report.ErrorInfo;
 import org.schabi.newpipe.report.UserAction;
 import org.schabi.newpipe.util.AnimationUtils;
 import org.schabi.newpipe.util.Constants;
@@ -248,7 +249,7 @@ public void onResume() {
         } catch (final Exception e) {
             ErrorActivity.reportError(getActivity(), e, requireActivity().getClass(),
                     requireActivity().findViewById(android.R.id.content),
-                    ErrorActivity.ErrorInfo.make(UserAction.UI_ERROR,
+                    ErrorInfo.make(UserAction.UI_ERROR,
                             "",
                             "", R.string.general_error));
         }

app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistDialog.java

@@ -17,7 +17,7 @@
 public abstract class PlaylistDialog extends DialogFragment implements StateSaver.WriteRead {
     private List<StreamEntity> streamEntities;
 
-    private StateSaver.SavedState savedState;
+    private org.schabi.newpipe.util.SavedState savedState;
 
     protected void setInfo(final List<StreamEntity> entities) {
         this.streamEntities = entities;