val permissions = arrayOf(android.Manifest.permission.CAMERA, android.Manifest.permission.WRITE_EXTERNAL_STORAGE, android.Manifest.permission.READ_EXTERNAL_STORAGE)

private fun hasNoPermissions(): Boolean{
    return ContextCompat.checkSelfPermission(this,
        Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this,
        Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this,
        Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED
}

fun requestPermission(){
    ActivityCompat.requestPermissions(this, permissions,0)
}