服务器端添加好友，安卓端第一次登陆闪退（安卓5.1系统以上），以后登陆正常。

E/SQLiteLog: (1555) abort at 10 in [INSERT INTO contact (username) VALUES (?)]: UNIQUE constraint failed: contact.username

01-04 10:52:45.794 22562-22597/com.example.administrator.im E/art: JNI DETECTED ERROR IN APPLICATION: JNI GetMethodID called with pending exception 'java.lang.NullPointerException' thrown in unknown throw location

01-04 10:52:45.794 22562-22597/com.example.administrator.im E/art:     in call to GetMethodID

01-04 10:52:45.794 22562-22597/com.example.administrator.im E/art: "Thread-2601" prio=5 tid=40 Runnable

01-04 10:52:45.794 22562-22597/com.example.administrator.im E/art:   | group="main" sCount=0 dsCount=0 obj=0x12da40a0 self=0x7f84c61000

01-04 10:52:45.794 22562-22597/com.example.administrator.im E/art:   | sysTid=22597 nice=0 cgrp=default sched=0/0 handle=0x7f850df000

01-04 10:52:45.794 22562-22597/com.example.administrator.im E/art:   | state=R schedstat=( 16718850 6936612 54 ) utm=0 stm=1 core=7 HZ=100

01-04 10:52:45.794 22562-22597/com.example.administrator.im E/art:   | stack=0x7f748ac000-0x7f748ae000 stackSize=1008KB

01-04 10:52:45.794 22562-22597/com.example.administrator.im E/art:   | held mutexes= "mutator lock"(shared held)

01-04 10:52:45.794 22562-22597/com.example.administrator.im E/art:   native: #00 pc 0000470c  /systemb64bbacktrace_libc++.so (Backtrace::Unwind(unsigned long, ucontext*)+28)

01-04 10:52:45.794 22562-22597/com.example.administrator.im E/art:   native: #01 pc 00000027  ???

01-04 10:52:45.794 22562-22597/com.example.administrator.im E/art:   (no managed stack frames)

01-04 10:52:45.801 22562-22597/com.example.administrator.im Abc: Fatal signal 6 (SIGABRT), code -6 in tid 22597 (Thread-2601)

01-04 10:52:47.547 946-1075 E/InputDispatcher: channel '1a261650 com.example.administrator.im/activity.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed!

01-04 10:52:47.547 946-1075 E/InputDispatcher: channel '26f43289 com.example.administrator.im/activity.LoginActivity (server)' ~ Channel is unrecoverably broken and will be disposed!

01-04 10:52:47.796 946-23701 E/JavaBinder: !!! FAILED BINDER TRANSACTION !!!

01-04 10:52:47.902 946-1060 E/JavaBinder: !!! FAILED BINDER TRANSACTION !!!

01-04 10:52:47.907 946-1060 E/JavaBinder: !!! FAILED BINDER TRANSACTION !!!

01-04 10:52:47.914 946-1596 E/JavaBinder: !!! FAILED BINDER TRANSACTION !!!

01-04 10:52:47.919 946-1596 E/JavaBinder: !!! FAILED BINDER TRANSACTION !!!

01-04 10:52:47.919 946-1596 E/JavaBinder: !!! FAILED BINDER TRANSACTION !!!

01-04 10:52:47.956 1607-1607 E/JavaBinder: !!! FAILED BINDER TRANSACTION !!!

01-04 10:52:47.964 1607-1607 E/JavaBinder: !!! FAILED BINDER TRANSACTION !!!

01-04 10:52:47.976 1607-1607 E/JavaBinder: !!! FAILED BINDER TRANSACTION !!!

01-04 10:52:48.063 1906-2021 E/CellLocation: create GsmCellLocation

01-04 10:52:48.159 946-1055 E/JavaBinder: !!! FAILED BINDER TRANSACTION !!!

01-04 10:52:48.242 946-1060 E/JavaBinder: !!! FAILED BINDER TRANSACTION !!!

01-04 10:53:11.024 2188-20469 E/MediaScanner: scanSingleFile: Not exist path=/storage/emulated/0/DingTalk