Save dialog and File picker

[TheSandBoxMKG]

Feature description

Storage Access Framework for:

• Picking location and name of the file to create (android.intent.action.CREATE_DOCUMENT)
• Picking file (android.intent.action.OPEN_DOCUMENT)

Reference implementation

Have you checked if the feature is accessible through the Android API? Do you know of other open-source apps that has a similar feature as the one you want? (Provide links)

It's widely available and most apps for recent Android versions use it.