java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
        at org.json.JSONTokener.nextCleanInternal(JSONTokener.java:116)
        at org.json.JSONTokener.nextValue(JSONTokener.java:94)
        at org.json.JSONObject.<init>(JSONObject.java:159)
        at org.json.JSONObject.<init>(JSONObject.java:176)
        at com.anlyn.project.MailContentsFragment$BackgroundTaskDeleteMail.onPostExecute(MailContentsFragment.java:294)
        at com.anlyn.project.MailContentsFragment$BackgroundTaskDeleteMail.onPostExecute(MailContentsFragment.java:253)

이런 에러가 나온다면
닝겐이여  .. php에서 받아오는 값이 이상하다네
php 등짝을 찾아보자 ..