getContentResolver() is not working

Question

I have a class name MyPhoneStateListener. Here, I want to use getContentResolver, but there is some problem in the class. It's not my main activity.

Cursor cur = getContentResolver()
         .query(Calls.CONTENT_URI, projection, null, null, Calls.DATE +" desc");

Answer 1

To use getContentResolver inside another class which doesn't extends Activity/Service you should have a Context object.

Inside your MyPhoneStateListener class, in your constructor ask for a Context and save it, then when you need the content resolver use context.getContentResolver()

Example:

public class MyPhoneStateListener {
 private Context context;
 public MyPhoneStateListener(Context context) {
   this.context = context;
 }

 public void someMethod() {
    Cursor cur = context.getContentResolver()
     .query(Calls.CONTENT_URI, projection, null, null, Calls.DATE +" desc");
 }
}

Answer 2

Cursor cur = this.getActivity().getContentResolver() .query(Calls.CONTENT_URI, projection, null, null, Calls.DATE +" desc");