Android ContentResolver

1、 String searchQuery = "column1 like '%" + searchKey + "%' or column2 like '%" + searchKey + "%'";

 String searchQuery 2= "column1 like ? or column2 like?";  

c = getContentResolver().query(uri, null, searchQuery, null,"date DESC");

2、Cursor cursor = contentResolver.query(android.provider.ContactsContract.Contacts.CONTENT_URI,  

    new String[]{android.provider.ContactsContract.Contacts.DISPLAY_NAME},  

    android.provider.ContactsContract.Contacts.DISPLAY_NAME + "=?",  new String[]{"張三"}, null);  

3、經過觀察者模式監聽媒體庫的變化實現APP本地數據自動更新：

http://zmywly8866.github.io/2015/03/03/auto-update-app-data.html