Android 三星SM-T555安卓设备开机面临问题

我有一台三星SM-T555安卓设备，操作系统版本为5.0.2

我使用了Android的

DevicePolicyManager

API，并将此设备作为设备所有者，但它挂起了。我还试图重新启动设备，但它卡住了，我无法重新启动它

我从此设备捕获了以下日志：

E/AndroidRuntime( 3512): FATAL EXCEPTION: Preference Handler Thread

E/AndroidRuntime( 3512): Process: com.samsung.android.SettingsReceiver, PID: 3512

E/AndroidRuntime( 3512): java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference

E/AndroidRuntime( 3512):    at com.samsung.android.SettingsReceiver.MountReceiver$1.handleMessage(MountReceiver.java:117)

E/AndroidRuntime( 3512):    at android.os.Handler.dispatchMessage(Handler.java:102)

E/AndroidRuntime( 3512):    at android.os.Looper.loop(Looper.java:145)

E/AndroidRuntime( 3512):    at android.os.HandlerThread.run(HandlerThread.java:61)

V/ApplicationPolicy(  851): isApplicationStateBlocked userId 0 pkgname com.samsung.android.SettingsReceiver

W/System.err( 3512): android.content.pm.PackageManager$NameNotFoundException: Application package com.android.settings not found

W/ActivityManager(  851): Process com.samsung.android.SettingsReceiver has crashed too many times: killing!

I/ActivityManager(  851): Killing 3512:com.samsung.android.SettingsReceiver/1000 (adj 0): crash

D/ActivityManager(  851): startProcessLocked calleePkgName: com.samsung.android.SettingsReceiver, hostingType: broadcast

W/BroadcastQueue(  851): Unable to launch app com.samsung.android.SettingsReceiver/1000 for broadcast Intent { act=android.intent.action.BOOT_COMPLETED flg=0x8000010 (has extras) }: process is bad