Can't get file uri from intent onActivityResult

问题

I would like to receive normal file path from onActivityResult like this:

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (resultCode == RESULT_OK) {
            Log.i("m", data!!.dataString!!)
            convertFileToString(data.dataString!!)

        }
    }

but I receive such error:

java.io.FileNotFoundException: File 'content:/com.android.providers.media.documents/document/image%3A18' does not exist

this exception comes from method which converts my file to string. This error points to this line:

try {
val data = FileUtils.readFileToByteArray(file) // this line

} catch (e: IOException) {
e.printStackTrace()
}

This file exists also but I can't get it. I saw here some questions which suggest to get REAL path like this:

fun getPath(context:Context, uri:Uri):String {
  val result:String = null
  val proj = arrayOf<String>(MediaStore.Images.Media.DATA)
  val cursor = context.getContentResolver().query(uri, proj, null, null, null)
  if (cursor != null)
  {
    if (cursor.moveToFirst())
    {
      val column_index = cursor.getColumnIndexOrThrow(proj[0])
      result = cursor.getString(column_index)
    }
    cursor.close()
  }
  if (result == null)
  {
    result = "Not found"
  }
  return result
}

but this method return such exception:

java.io.FileNotFoundException: File 'Not found' does not exist

So, what I receive here data!!.dataString!!:

content://com.android.providers.media.documents/document/image%3A18

and what I receive here Log.i("m",uri.path.toString()):

/document/image:18

as I see this is not real path on which this pict was saved. Maybe someone knows where I made errors?)

UPDATE

How I convert file to string:

fun convertFileToString(path: String) {
        //dialog.dismiss()
        val file = File(path)

        for (i in 0 until sn.array!!.size()) {
            val jsonObj = sn.array!![i].asJsonObject
            val nFile = jsonObj.get("filename").asString

            if (file.name == nFile) {
                Toast.makeText(this, R.string.message_about_attached__file, Toast.LENGTH_SHORT).show()
                return
            }
        }

        try {
            val data = FileUtils.readFileToByteArray(file)
            uploadFiles(File(path).name, Base64.encodeToString(data, Base64.NO_WRAP))
        } catch (e: IOException) {
            e.printStackTrace()
        }
    }

回答1:

I would like to receive normal file path from onActivityResult like this:

My guess is that you are using ACTION_OPEN_DOCUMENT, or perhaps ACTION_GET_CONTENT. You are getting a content Uri, which is exactly what those Intent actions are documented to return. Such a Uri might be backed by:

A local file on external storage, which you probably cannot access on Android 10+
A local file on internal storage for the other app
A local file on removable storage
A local file that is encrypted and needs to be decrypted on the fly
A stream of bytes held in a BLOB column in a database
A piece of content on the Internet that needs to be downloaded by the other app first
Content that is generated on the fly
...and so on

this exception comes from method which converts my file to string

I assume that by "converts my file to string", you mean read the file contents in as a String. In that case:

Get a ContentResolver by calling getContentResolver() on a Context, such as your Activity
Call openInputStream() on the ContentResolver, passing in your Uri, to get an InputStream on the content identified by the Uri
Call reader().readText() on the InputStream to get a String representing the file contents

Combined, that should be something like:

val string = data.data?.let { contentResolver.openInputStream(it).use { it.reader().readText() } }

来源：https://stackoverflow.com/questions/59911568/cant-get-file-uri-from-intent-onactivityresult

标签

android

file

onactivityresult