Android 笔记

2019-3-29

Uri、File、String 转换

val uri : Uri

val str = uri.toString()

val file = File(URI(str))

val uri = Uri.fromFile(file)

val uri = Uri.parse(str)

// content uri -> file path

private fun filePathFromContentUri(context: Context, uri: Uri): String?{

val pathColumn = Array(1){MediaStore.MediaColumns.DATA}

    val cursor = context.contentResolver.query(uri, pathColumn, null, null, null)

cursor?.moveToFirst()

val columnIndex = cursor?.getColumnIndex(pathColumn[0])

val filePath =if(columnIndex ==null)null else cursor.getString(columnIndex)

cursor?.close()

return filePath

}