在SQLite数据库更改上更新游标

Question

This is my scenario:

Activity 1 , Is where I have a list with items.

Activity 1 contains an object of Class A , which deals with getting and returning a cursor of data retrieved by an SQLite database, via a Loader Manager set up, to Activity 1 .

In Activity 1 , Each of these views within the list have buttons. When pressing a button, Class B is executed.

Class B changes a single value within the SQLite database.

In Class B , How can I notify the Loader Manager that the data has changed, for it to refresh the cursor. Remember, The Loader Manager is set up in Class A .

Essentially, If the above didn't make sense, I need to refresh the cursor as the underlying sql data has changed, but I need to do this from a class that has not a direct connection to the loader manager.

Answer 1

You can have both classes have access to each other , say in your onCreate in Activity1

ClassA obj1 = new ClassA(...);
ClassB obj2 = new ClassB(...);
obj2.setClasssA(obj1);

and inside your ClassB code, after you're done with updating the db you can just call a method in classA to update the cursor. something a long the line of :

obj1.onNewData();

I hope that makes sense