Issue with reflection Implementation

[shivapbhusal]

In class LeakSms, This method is called using reflection:

public String getSMS()
    {
        String str = "";
        Uri inboxURI = Uri.parse("content://sms/inbox");
        Cursor cur = getContentResolver().query(inboxURI, null, null, null, null);
        if (cur.moveToFirst()) {
            str = cur.getString(cur.getColumnIndexOrThrow("body"));
        }
        str=str.replace(" ","_");
        return str;

        }

If I just return a dummy string, it works properly. If I implement the entire SMS extracting part, it simply doesn't work.