huruwo / serialporthelper Goto Github PK

RT

当从串口获取数据后，如何完整的解析一个命令，比如判断头，尾，校验码，判断一个数据是否完整接收等问题，能否大体举例说明一下

求解。。。我直接用的是aar的方式，但不知道为什么报找不到库

2020-07-23 10:24:56.092 8730-8730/com.huruwo.serialporthelper E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.huruwo.serialporthelper, PID: 8730
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.huruwo.serialporthelper/com.huruwo.serialporthelper.SerialPortHelperActivity}: java.lang.NullPointerException: Attempt to get length of null array
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2804)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2875)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1578)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:156)
at android.app.ActivityThread.main(ActivityThread.java:6623)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:942)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:832)
Caused by: java.lang.NullPointerException: Attempt to get length of null array
at android_serialport_api.SerialPortFinder$Driver.getDevices(SerialPortFinder.java:44)
at android_serialport_api.SerialPortFinder.getAllDevicesPath(SerialPortFinder.java:111)
at com.huruwo.serialporthelper.SerialPortHelperActivity.iniview(SerialPortHelperActivity.java:91)
at com.huruwo.serialporthelper.SerialPortHelperActivity.onCreate(SerialPortHelperActivity.java:63)
at android.app.Activity.performCreate(Activity.java:6910)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2757)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2875) 
at android.app.ActivityThread.-wrap12(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1578) 
at android.os.Handler.dispatchMessage(Handler.java:105) 
at android.os.Looper.loop(Looper.java:156) 
at android.app.ActivityThread.main(ActivityThread.java:6623) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:942) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:832) 
2020-07-23 10:24:56.102 8730-8730/com.huruwo.serialporthelper I/Process: Sending signal. PID: 8730 SIG: 9