How to add intent type by using ActivityResultContracts.CreateDocument()

Question

I was using the below code to create a file on external storage

        Intent(Intent.ACTION_CREATE_DOCUMENT).apply {
        addCategory(Intent.CATEGORY_OPENABLE)
        type = "audio/*"
        putExtra(Intent.EXTRA_TITLE, fileName)
    }.also {
        startActivityForResult(it, CREATE_FILE)
    }

Since startActivityForResult is deprecated I am using ActivityResultContracts.CreateDocument(). However I couldn't added intent type which is shown in the above code as type = "audio/*"

Here is my code;

       val createFileIntent =
        registerForActivityResult(ActivityResultContracts.CreateDocument()) { uri ->
            // todo
        }
      
       // usage
       createFileIntent.launch(fileName)

How can I add intent type?

Answer 1

According with documentation for ActivityResultContracts.CreateDocument , you can inherit the class to customize Intent, for example:

  class CreateSpecificTypeDocument(private val type: String) :
        ActivityResultContracts.CreateDocument() {
        override fun createIntent(context: Context, input: String): Intent {
            return super.createIntent(context, input).setType(type)
        }
    }

and then register it for activity result:

 registerForActivityResult(CreateSpecificTypeDocument("audio/*")) {
  // todo
 }