# Flutter error
### Unable to instantiate activity
- https://webnautes.tistory.com/1320
# build.gradle
android {
...
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
### Could not read script '/Users/[User]/sdk/flutter/packages/flutter_tools/gradle/app_plugin_loader.gradle'
- https://stackoverflow.com/questions/61436827/error-fluttersdkpath-packages-flutter-tools-gradle-app-plugin-loader-gradle-w
```
$ rm android/settings.gradle
$ flutter create .
```
### The method 'map' was called on null
```dart
istProvices?.map((Provinces value) {
return new DropdownMenuItem(
value: value,
child: new Text(value.name, style: new TextStyle(fontSize: 16.0),),
);
})?.toList() ?? [],
```
### 'GL_EXT_shader_framebuffer_fetch' : extension is not supported
Yes, it's wrong only in android emulator.
* https://github.com/flutter/flutter/issues/34479