I am trying to get the uri for the pdf document stored in documents folder on actual android device.

Actual doc path on device is /storage/emulated/0/Documents/testme.pdf

to get the uri for this file this is the code I have tried

 override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (resultCode == Activity.RESULT_OK && requestCode == FILE_BROWSER_REQUEST_CODE) {
            val uri: Uri? = data!!.getData() // - content://com.android.providers.media.documents/document/document:30082


            val fileTest = File(uri!!.path) // /document/document:30082
            if(fileTest.exists() && fileTest.canRead()) { // both are FALSE
                Toast.makeText(context, "fileTest exists", Toast.LENGTH_LONG).show()
            }
        }
    }

getting the file from uri definitely is not the right way I am doing

how can I get the right uri please

your help is much appreciated

Thanks R

CodePudding user response：

You cannot get a File from an Uri. An Uri can only be used by a DocumentFile.

The Uri you need is stored in your "uri" variable.

I recommend reading something about DocumentFiles here https://developer.android.com/reference/androidx/documentfile/provider/DocumentFile

CodePudding user response：

You can use Scoped Storage API to get the document.

Just use the system file picker to get the URI.

1. Create a Contract class

class FilePickerContract : ActivityResultContract<Unit, List<Uri>>() {
  override fun createIntent(context: Context, input: Unit?): Intent =
      Intent(Intent.ACTION_GET_CONTENT).setType("*/*").putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true)

  override fun parseResult(resultCode: Int, intent: Intent?): List<Uri> = if (resultCode != Activity.RESULT_OK || intent == null) {
    emptyList()
  } else {
    val uris = mutableListOf<Uri>()
    intent.data
        ?.let {
          uris.add(it)
        }
        ?: intent.clipData?.let { clipData ->
          for (i in 0 until clipData.itemCount) {
            uris.add(clipData.getItemAt(i).uri)
          }
        }
    uris
  }
}

2. Create an instance of the Contract

private val filePickerResultContract = registerForActivityResult(FilePickerContract()) { uris: List<Uri> ->
        if (uris.isNotEmpty()) {
            // do something with uris...
        } else {
            // no uris
        }
    }

3. Launch the contract

filePickerResultContract.launch(Unit)

You can read more about Android SAF here