//Uri allContacts = Uri.parse("content://contacts/people");
        Uri allContacts = ContactsContract.Contacts.CONTENT_URI;

      
        Cursor c; 
        if (android.os.Build.VERSION.SDK_INT <11) {
        	//---before Honeycomb---
            c = managedQuery(allContacts, null,null,null,null);
            
        } else {
        	//---Honeycomb and later---
            CursorLoader cursorLoader = new CursorLoader(
            		this, 
            		allContacts, 
            		null,
                    null,
                    null,
                    null);
            c = cursorLoader.loadInBackground();        	
        }
        
        String[] columns = new String[] {
            ContactsContract.Contacts.DISPLAY_NAME,
            ContactsContract.Contacts._ID};
        
        int[] views = new int[] {R.id.contactName, R.id.contactID};

        SimpleCursorAdapter adapter;
        
        if (android.os.Build.VERSION.SDK_INT <11) {
        	//---before Honeycomb---
        	adapter = new SimpleCursorAdapter(
        			this, R.layout.activity_main, c, columns, views);
        } else {
        	//---Honeycomb and later---
        	adapter = new SimpleCursorAdapter(
        			this, R.layout.activity_main, c, columns, views,
        			CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);        	
        }        
        this.setListAdapter(adapter);