android.provider.ContactsContract.PhoneLookup#LOOKUP_KEY源码实例Demo

public boolean isSystemContact(Context context, String number) {
  Uri      uri        = Uri.withAppendedPath(PhoneLookup.CONTENT_FILTER_URI, Uri.encode(number));
  String[] projection = new String[]{PhoneLookup.DISPLAY_NAME, PhoneLookup.LOOKUP_KEY,
                                     PhoneLookup._ID, PhoneLookup.NUMBER};
  Cursor   cursor     = context.getContentResolver().query(uri, projection, null, null, null);

  try {
    if (cursor != null && cursor.moveToFirst()) {
      return true;
    }
  } finally {
    if (cursor != null) cursor.close();
  }

  return false;
}
 

@Override
public Uri getSelfIdentityUri() {
  String[] PROJECTION = new String[] {
      PhoneLookup.DISPLAY_NAME,
      PhoneLookup.LOOKUP_KEY,
      PhoneLookup._ID,
  };

  Cursor cursor = null;

  try {
    cursor = context.getContentResolver().query(ContactsContract.Profile.CONTENT_URI,
                                                  PROJECTION, null, null, null);

    if (cursor != null && cursor.moveToFirst()) {
      return Contacts.getLookupUri(cursor.getLong(2), cursor.getString(1));
    }
  } finally {
    if (cursor != null)
      cursor.close();
  }

  return null;
}