check self permission android write_external_storage
private void checkDiskPermission ()
{
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this, "No Permissions" , Toast.LENGTH_LONG).show();
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 0);
}
else
{
Toast.makeText(this, "Has Permissions" , Toast.LENGTH_LONG).show();
}
}