Possible Duplicate:
Is it possible to programmatically uninstall a package in Android
We can delete package by following steps below:
Uri uri = Uri.fromParts("package", strPackageName, null);
Intent it = new Intent(Intent.ACTION_DELETE, uri);
startActivity(it);
But in this way, Applications Manager's UI will be displayed, my question is how to delete packages silently (without Applications Manager's UI showing).