Default로 설정할 때 ResolverActivity.OnClick() { ..... if (filter != null) { final int N = mAdapter.mList.size(); ComponentName[] set = new ComponentName[N]; int bestMatch = 0; for (int i=0; i bestMatch) bestMatch = r.match; } getPackageManager().addPreferredActivity(filter, bestMatch, set, intent.getComponent()); } } Default 해제 할 때 (Settings>Launch by default>Clear defaults) InstalledAppDetails.onCl..