postUrl assert( sNotEmpty() loadData _valide initialized HashMap headers .cast WebView print throw InAppWeb Boolean [WebHistory.list] open Cannot laod _throwIsNotOpened takeS Completer args.putIfAbsent('isLocalFile', () => true); args.putIfAbsent('isLocalFile', () => Opens the _isOpened initialFile onBrowserCreated getUrl onScrollChanged initialData openData activity.getPreferences(0) Log. com.pichillilorenzo.flutter_inappbrowser flutter_inappbrowser $PROJECT_DIR$/example/android 1536836356751 1536836356751 Android 1.8 flutter_inappbrowser_android Dart SDK