Configurable filename for export: used for all automatic exports after recording, exporting all, and sharing tracks.

Fixes #512.

src/main/java/de/dennisguse/opentracks/settings/ImportExportSettingsFragment.java

@@ -4,6 +4,7 @@ import android.net.Uri;
 import android.os.Bundle;
 
 import androidx.documentfile.provider.DocumentFile;
+import androidx.preference.EditTextPreference;
 import androidx.preference.ListPreference;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
@@ -12,16 +13,20 @@ import java.util.Locale;
 
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.io.file.TrackFileFormat;
+import de.dennisguse.opentracks.io.file.TrackFilenameGenerator;
 import de.dennisguse.opentracks.util.IntentUtils;
 
 public class ImportExportSettingsFragment extends PreferenceFragmentCompat {
 
+    private static final String TAG = ImportExportSettingsFragment.class.getSimpleName();
+
     @Override
     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
         addPreferencesFromResource(R.xml.settings_import_export);
 
         setExportTrackFileFormatOptions();
         setExportDirectorySummary();
+        setFilenameTemplate();
     }
 
     @Override
@@ -77,4 +82,19 @@ public class ImportExportSettingsFragment extends PreferenceFragmentCompat {
             return directoryUri + (directory.canWrite() ? "" : getString(R.string.export_dir_not_writable));
         });
     }
+
+    private void setFilenameTemplate() {
+        EditTextPreference preference = findPreference(getString(R.string.export_filename_format_key));
+        preference.setOnBindEditTextListener(t -> {
+            t.setHint(getString(R.string.export_filename_format_default));
+        });
+        preference.setDialogMessage(TrackFilenameGenerator.getAllOptions());
+
+        preference.setOnPreferenceChangeListener((p, newValue) -> new TrackFilenameGenerator(newValue.toString()).isValid());
+
+        preference.setSummaryProvider(p ->
+                PreferencesUtils.getTrackFileformatGenerator()
+                        .getExample()
+        );
+    }
 }

src/main/java/de/dennisguse/opentracks/settings/PreferencesUtils.java

@@ -44,6 +44,7 @@ import de.dennisguse.opentracks.data.models.Distance;
 import de.dennisguse.opentracks.data.models.DistanceFormatter;
 import de.dennisguse.opentracks.data.models.Speed;
 import de.dennisguse.opentracks.io.file.TrackFileFormat;
+import de.dennisguse.opentracks.io.file.TrackFilenameGenerator;
 import de.dennisguse.opentracks.ui.customRecordingLayout.CsvLayoutUtils;
 import de.dennisguse.opentracks.ui.customRecordingLayout.Layout;
 import de.dennisguse.opentracks.util.TrackIconUtils;
@@ -573,6 +574,16 @@ public class PreferencesUtils {
         return getBoolean(R.string.post_workout_export_enabled_key, INSTANT_POST_WORKOUT_EXPORT_DEFAULT) && isDefaultExportDirectoryUri();
     }
 
+    public static TrackFilenameGenerator getTrackFileformatGenerator() {
+        String DEFAULT = getString(R.string.export_filename_format_default, null);
+        TrackFilenameGenerator generator = new TrackFilenameGenerator(getString(R.string.export_filename_format_key, DEFAULT));
+        if (generator.isValid()) {
+            return generator;
+        } else {
+            return new TrackFilenameGenerator(DEFAULT);
+        }
+    }
+
     public static TrackFileFormat getExportTrackFileFormat() {
         final String TRACKFILEFORMAT_NAME_DEFAULT = getString(R.string.export_trackfileformat_default, null);
         String trackFileFormatName = getString(R.string.export_trackfileformat_key, TRACKFILEFORMAT_NAME_DEFAULT);