title: Does query ever return a null cursor
body: <p>I always see people say that it <a href="https://stackoverflow.com/questions/12537493/when-does-query-returns-null-on-android/12537873#12537873">cursor is never null</a> so you dont need to check for null or not but then there are other people that say that cursor can be null and you chould always check it.</p>
  
  <p>so looking at the query method <a href="https://android.googlesource.com/platform/frameworks/base/+/refs/heads/master/core/java/android/content/ContentResolver.java" rel="nofollow noreferrer">here</a> it does show that null gets returned so I dont know if I am just missing something or are the people saying that cursor is never null wrong? </p>
  
  <p>do you or do you not need to check if <code>Cursor</code> is null when a query is made? </p>