2019-09-09 16:34:51.442 352-400/? D/AudioHardwareTiny: start_output_stream
2019-09-09 16:34:51.444 352-400/? D/alsa_route: route_info->sound_card 0, route_info->devices 0
2019-09-09 16:34:51.444 352-400/? D/AudioHardwareTiny: The current HDMI is DVI mode
2019-09-09 16:34:51.522 8407-8507/com.gyroor.selfbalance D/===AVOS Cloud===: q0$a->a->2: {"sessionToken":"44kw8tc3oldaurz8zypterw0f","updatedAt":"2019-07-26T09:03:02.557Z","age":"26","objectId":"5cebd41e43e78c00671b3e11","username":"18676690079","createdAt":"2019-05-27T12:12:14.245Z","Sex":"female","Nick":"\u738b\u7f8e\u4e3d","emailVerified":false,"mobilePhoneNumber":"18676690079","mobilePhoneVerified":true}
2019-09-09 16:34:51.527 8407-8507/com.gyroor.selfbalance W/===AVOS Cloud===: i->4: Internal key name:updatedAt,please use setter/getter for it.
2019-09-09 16:34:51.530 8407-8507/com.gyroor.selfbalance W/===AVOS Cloud===: i->4: Internal key name:objectId,please use setter/getter for it.
2019-09-09 16:34:51.532 8407-8507/com.gyroor.selfbalance W/===AVOS Cloud===: i->4: Internal key name:createdAt,please use setter/getter for it.
2019-09-09 16:34:51.539 8407-8407/com.gyroor.selfbalance W/System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Throwable.getMessage()' on a null object reference
2019-09-09 16:34:51.539 8407-8407/com.gyroor.selfbalance W/System.err: at com.classywalk.selfbalance.main.p.b.b$a.a(SourceFile:14)
2019-09-09 16:34:51.539 8407-8407/com.gyroor.selfbalance W/System.err: at com.avos.avoscloud.p0.b(SourceFile:2)
2019-09-09 16:34:51.539 8407-8407/com.gyroor.selfbalance W/System.err: at com.avos.avoscloud.p0.b(SourceFile:1)
2019-09-09 16:34:51.540 8407-8407/com.gyroor.selfbalance W/System.err: at com.avos.avoscloud.c$a.run(SourceFile:1)
2019-09-09 16:34:51.540 8407-8407/com.gyroor.selfbalance W/System.err: at android.os.Handler.handleCallback(Handler.java:755)
2019-09-09 16:34:51.540 8407-8407/com.gyroor.selfbalance W/System.err: at android.os.Handler.dispatchMessage(Handler.java:95)
2019-09-09 16:34:51.540 8407-8407/com.gyroor.selfbalance W/System.err: at android.os.Looper.loop(Looper.java:154)
2019-09-09 16:34:51.540 8407-8407/com.gyroor.selfbalance W/System.err: at android.app.ActivityThread.main(ActivityThread.java:6141)
2019-09-09 16:34:51.541 8407-8407/com.gyroor.selfbalance W/System.err: at java.lang.reflect.Method.invoke(Native Method)
2019-09-09 16:34:51.541 8407-8407/com.gyroor.selfbalance W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912)
2019-09-09 16:34:51.541 8407-8407/com.gyroor.selfbalance W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:802)
2019-09-09 16:34:51.591 8407-8412/com.gyroor.selfbalance I/art: Do partial code cache collection, code=21KB, data=30KB
2019-09-09 16:34:51.591 8407-8412/com.gyroor.selfbalance I/art: After code cache collection, code=18KB, data=28KB
2019-09-09 16:34:51.591 8407-8412/com.gyroor.selfbalance I/art: Increasing code cache capacity to 128KB
2019-09-09 16:34:54.646 352-400/? D/alsa_route: route_set_controls() set route 24
2019-09-09 16:34:54.646 352-400/? D/AudioHardwareTiny: close device
以上信息为本地错误信息，信息很明显，有一个空指针，但是指向avoscloud，不知道是什么数据报错，返回的数据是登陆成功后的个人信息。证明已经登陆成功，但是出现了错误。
请帮忙分析是哪里出错了
在studio中直接运行到手机上的安装包没有错误，能正常使用；但是打的正式签名包就会报错，导致用不了。
