private class ExportDatabaseFileTask extends AsyncTask<String, Void, Boolean> {?
? ? ? ? private final ProgressDialog dialog = new ProgressDialog(ctx);?
?
? ? ? ? // can use UI thread here?
? ? ? ? protected void onPreExecute() {?
? ? ? ? ? ?this.dialog.setMessage("Exporting database...");?
? ? ? ? ? ?this.dialog.show();?
? ? ? ? }?
?
? ? ? ? // automatically done on worker thread (separate from UI thread)?
? ? ? ? protected Boolean doInBackground(final String... args) {?
?
? ? ? ? ? ?File dbFile =?
? ? ? ? ? ? ? ? ? ? new File(Environment.getDataDirectory()