Android Intent Pick

(i), call local contact:
Intent Intent = new Intent (Intent.action_pick);
Intent.settype (ContactsContract.Contacts.CONTENT_TYPE);
Startactivityforresult (Intent, pick_contact);
(b), call the library, get all the local pictures:
Intent imageintent = new Intent (intent.action_get_content);
Imageintent.settype ("image/*");
Startactivityforresult (Imageintent, pick_image);
(iii), Call Music, get all local music files:
Intent audiointent = new Intent (intent.action_get_content);
Audiointent.settype ("audio/*");
Startactivityforresult (Audiointent, Pick_audio);
(iv), call the library, get all local video files:
Intent videointent = new Intent (intent.action_get_content);
Videointent.settype ("video/*");
Startactivityforresult (Videointent, Pick_video);

Android Intent Pick