Extras

- adb
    - this `-k` flag means it will keep cache and app data so making it more safer
    - `adb shell`
    - `adb shell pm list packages` to list installed packages
    - adb uninstall <package_name> : to uninstall app
    -  `adb shell pm uninstall -k --user 0 <application_name>` to safely install package and not uninstall system istead
	-  `adb shell pm disable-user  --user 0 com.miui.android.fashiongallery` to disable for user in case cant be deleted for user

 - video players
   https://pub.dev/packages/video_player_media_kit/example
   [media_kit_ex.zip](../../../_resources/media_kit_ex.zip)
- pip (Picture in picture)
 https://pub.dev/packages/flutter_in_app_pip
 https://pub.dev/packages/pip_view (more scores than upper one)
- audio play background 
  https://pub.dev/packages/just_audio_background
- some design kits like material design
 [designs ui.txt](../../../_resources/designs%20ui.txt)
- file system
  - https://docs.flutter.dev/cookbook/persistence/reading-writing-files 
  - in android for accessing external storage need a permission handler to grant storage like this
    https://pub.dev/packages/permission_handler
	```dart
	Future<void> storagePermissions() async {
	  // var status = await Permission.storage.request();
	  var status = await Permission.storage.request();
	  // Permission.storage.request();
	  // var status = await Permission.camera.request();

	  if (status.isDenied) {
		print('storage permission denied');
	  } else if (status.isGranted) {
		print('storage permission granted');
	  }
	}
	```
  - also in `AndroidManifest.xml` , add following
   for below android 11
   ```xml
	<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
   ```
   for  above andoid 11
	 ```xml
	<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
	```
    - by default only photos and videos access is granted so for full grant add following in manifest 
    `<application android:requestLegacyExternalStorage="true">`
- forms
  https://docs.flutter.dev/cookbook/forms/text-input
- fetch data from internet
  https://docs.flutter.dev/cookbook/networking/fetch-data
- parsing html 
  https://pub.dev/packages/html
  [parsing_with_new.dart](../../../_resources/parsing_with_new.dart)
- toast in flutter
  https://docs.flutter.dev/cookbook/design/snackbars
- dropdown menu
  https://api.flutter.dev/flutter/material/DropdownMenu-class.html
- to add support for platforms use
 `flutter create --platforms=ios,android foo` foo here is path of directory containing pubspec.yml
  

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### Snipppets
- popupmenu
https://betterprogramming.pub/popup-menu-customization-in-flutter-aa8827f6ce39
 [popupmenu.dart](../../../_resources/popupmenu.dart)
- contextmenu and rendering popmenu anywhere on screen
[rightclick_simulation.dart](../../../_resources/rightclick_simulation.dart)