Removed CustomContentProvider.openFile() as it was used for Google Earth integration.

src/main/java/de/dennisguse/opentracks/content/CustomContentProvider.java

@@ -20,7 +20,6 @@ import android.content.ContentProvider;
 import android.content.ContentUris;
 import android.content.ContentValues;
 import android.content.Context;
-import android.content.Intent;
 import android.content.UriMatcher;
 import android.database.Cursor;
 import android.database.SQLException;
@@ -29,18 +28,12 @@ import android.database.sqlite.SQLiteException;
 import android.database.sqlite.SQLiteOpenHelper;
 import android.database.sqlite.SQLiteQueryBuilder;
 import android.net.Uri;
-import android.os.ParcelFileDescriptor;
 import android.text.TextUtils;
 import android.util.Log;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.VisibleForTesting;
 
-import de.dennisguse.opentracks.util.FileUtils;
-
-import java.io.File;
-import java.io.FileNotFoundException;
-
 /**
  * A {@link ContentProvider} that handles access to track points, tracks, and
  * waypoints tables.
@@ -277,23 +270,6 @@ public class CustomContentProvider extends ContentProvider {
         return count;
     }
 
-    @Override
-    public ParcelFileDescriptor openFile(@NonNull Uri uri, @NonNull String mode) throws FileNotFoundException {
-        try {
-            File file = new File(uri.getPath());
-            if (file.exists()) {
-                return ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
-            }
-            throw new FileNotFoundException(uri.getPath());
-        } finally {
-            File dir = new File(getContext().getCacheDir(), FileUtils.PLAY_TRACKS_DIR);
-            for (File file : dir.listFiles()) {
-                file.delete();
-            }
-            getContext().revokeUriPermission(uri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
-        }
-    }
-
     /**
      * Gets the {@link UrlType} for a url.
      *

src/main/java/de/dennisguse/opentracks/util/FileUtils.java

@@ -35,10 +35,7 @@ public class FileUtils {
      * Used to transfer picture from the camera.
      */
     public static final String FILEPROVIDER = BuildConfig.APPLICATION_ID + ".fileprovider";
-    /**
+
-     * The play tracks directory in the app's cache directory.
-     */
-    public static final String PLAY_TRACKS_DIR = "temp";
     /**
      * Our external storage directory.
      */