android10 uri转file

fun Uri.toFile(context: Context): File? = when (scheme) {
    ContentResolver.SCHEME_FILE -> toFile()
    ContentResolver.SCHEME_CONTENT -> {
        val cursor = context.contentResolver.query(this, null, null, null, null)
        val file = cursor?.let {
            if (it.moveToFirst()) {
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
                    //保存到本地
                    val ois = context.contentResolver.openInputStream(this)
                    val displayName =
                        it.getString(it.getColumnIndex(OpenableColumns.DISPLAY_NAME))
                    ois?.let {
                        val file = File(
                            context.externalCacheDir!!.absolutePath,
                            "${Random.nextInt(0, 9999)}$displayName"
                        )
                        val fos = FileOutputStream(file)
                        android.os.FileUtils.copy(ois, fos)
                        fos.close()
                        it.close()
                        file
                    }
                } else
                //直接转换
                    File(it.getString(it.getColumnIndex(MediaStore.Images.Media.DATA)))
            } else null

        }
        cursor?.close()
        file
    }
    else -> null
}