Unhandled Exception: MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences) code example

Example 1: unhandled exception: missingpluginexception(no implementation found for method launch on channel plugins.flutter.io/url_launcher)

If you are using hot restart or hot reload, it won't do the trick. Since Flutter has to inject plugin dependencies into the platform-specific parts of your app, hot restart/hot reload is not enough to trigger the injection. Check this issue for more.

Close the app and execute flutter run command.

Example 2: flutter sharedpreferences missingpluginexception

uninstall the app from android deviec and re-install it again

Example 3: MissingPluginException(No implementation found for method share on channel flutter_share)

The share plugin works as intended. The error probably appears because
the addition of the plugin was followed by hot restart or hot reload
rather than full restart. This means the plugin's platform-specific code
is not built into the app.

Work around: stop the app and restart it after adding a plugin.

Documentation PR: flutter/website#1038