How to hide an intent in android

Question

I am using an activity to show Pdf in android but whenever I use it another application will install to the phone. The new app will allow user to use that module to open pdf too, that I dont want. how can i prevent this.

i use this code to run the activity but i forgot where i got the resource which was long time ago:

final File file = new File("/sdcard/anyfile.pdf");              
Uri uri = Uri.fromFile(file);
Intent intent = new Intent();
intent.setClassName("com.artifex.mupdf", "com.artifex.mupdf.MuPDFActivity");
intent.setAction(Intent.ACTION_VIEW);
intent.setData(uri);
startActivity(intent);

Answer 1

When you set this action for intent:

intent.setAction(Intent.ACTION_VIEW);

It will try to show all application which have intent filter for this action. Remove this and just launch your activity.