Android Question Application Crash with Unable to create service

Hi all,
I have a problem now.
I create a release version and install in phone.
Click and Run, app start up and run OK.
Then, Click phone Home button to set app background.
After several hours, click phone menu button and choose my app. Then app crash.
and show a diaglog : detect app crash several times, please unstall it.
Here, I select "No" button, App restart and run OK.
and then I use B4A bridge connect phone, debugging.
I get some err logs before correct start up.
What kind of problems may be the cause？

Logger连接到： HUAWEI BKK-AL10
--------- beginning of crash
FATAL EXCEPTION: main
Process: com.test.testplay, PID: 14893
java.lang.RuntimeException: Unable to create service com.test.testplay.starter: java.lang.RuntimeException: java.net.SocketException: Connection reset
at android.app.ActivityThread.handleCreateService(ActivityThread.java:3976)
at android.app.ActivityThread.-wrap5(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2109)
at android.os.Handler.dispatchMessage(Handler.java:109)
at android.os.Looper.loop(Looper.java:166)
at android.app.ActivityThread.main(ActivityThread.java:7555)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:469)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:963)
Caused by: java.lang.RuntimeException: java.net.SocketException: Connection reset
at anywheresoftware.b4a.shell.Shell.virtualAssets(Shell.java:164)
at anywheresoftware.b4a.shell.Shell.start(Shell.java:102)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:92)
at com.test.testplay.starter.onCreate(starter.java:34)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:3956)
... 8 more
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:209)
at java.net.SocketInputStream.read(SocketInputStream.java:139)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:248)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:288)
at java.io.BufferedInputStream.read(BufferedInputStream.java:347)
at java.io.DataInputStream.readFully(DataInputStream.java:198)
at java.io.DataInputStream.readInt(DataInputStream.java:389)
at anywheresoftware.b4a.shell.Shell.virtualAssets(Shell.java:136)
... 12 more
FATAL EXCEPTION: main
Process: com.test.testplay, PID: 29698
java.lang.RuntimeException: Unable to create service com.test.testplay.starter: java.lang.RuntimeException: java.lang.NullPointerException: Attempt to invoke virtual method 'void java.iutputStream.write(byte[])' on a null object reference
at android.app.ActivityThread.handleCreateService(ActivityThread.java:3976)
at android.app.ActivityThread.-wrap5(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2109)
at android.os.Handler.dispatchMessage(Handler.java:109)
at android.os.Looper.loop(Looper.java:166)
at android.app.ActivityThread.main(ActivityThread.java:7555)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:469)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:963)
Caused by: java.lang.RuntimeException: java.lang.NullPointerException: Attempt to invoke virtual method 'void java.iutputStream.write(byte[])' on a null object reference
at anywheresoftware.b4a.shell.Shell.virtualAssets(Shell.java:164)
at anywheresoftware.b4a.shell.Shell.start(Shell.java:102)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:92)
at com.test.testplay.starter.onCreate(starter.java:34)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:3956)
... 8 more
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void java.iutputStream.write(byte[])' on a null object reference
at anywheresoftware.b4a.shell.ShellConnector.sendControlMessage(ShellConnector.java:61)
at anywheresoftware.b4a.shell.Shell.virtualAssets(Shell.java:124)
... 12 more
--------- beginning of system
... The following is the normal startup log ...
.. and app runs ok.

regards