If the input media resource is invalid, MediaPlayer create calling may fail and returns null, so trigger one NullPointerException. Add the null pointer judegement when calling seekto and so on. Test: manual Fixes: 130032215 Change-Id: I38cb08584aa4e4c2ce4dc58a5a095960c7bd1948 Signed-off-by: Hoff Cheng <hoffc@qti.qualcomm.com>