我试图在我的应用程序中在Brother SDK中打印图像。JNI在Brother SDK上应用程序中检测到错误
这是我的代码：
`myPrinterInfo = myPrinter.getPrinterInfo();
myPrinterInfo.printerModel = PrinterInfo.Model.QL_810W;
myPrinterInfo.port = PrinterInfo.Port.NET;
myPrinterInfo.printMode = PrinterInfo.PrintMode.FIT_TO_PAGE;
myPrinterInfo.paperSize = PrinterInfo.PaperSize.CUSTOM;
myPrinterInfo.labelNameIndex = 5;
myPrinterInfo.isAutoCut = false;
myPrinterInfo.isCutAtEnd = false;
myPrinterInfo.orientation = PrinterInfo.Orientation.PORTRAIT;
myPrinterInfo.valign = PrinterInfo.VAlign.TOP;
myPrinterInfo.align = PrinterInfo.Align.LEFT;
myPrinterInfo.halftone = PrinterInfo.Halftone.THRESHOLD;
myPrinterInfo.ipAddress = "192.168.1.146";
myPrinterInfo.thresholdingValue = 127;
myPrinterInfo.pjCarbon = false;
myPrinterInfo.pjDensity = 5;
myPrinterInfo.pjFeedMode = PrinterInfo.PjFeedMode.PJ_FEED_MODE_FIXEDPAGE;
myPrinterInfo.pjPaperKind = PJ_CUT_PAPER;
myPrinterInfo.rollPrinterCase = PrinterInfo.PjRollCase.PJ_ROLLCASE_OFF;
myPrinterInfo.paperPosition = PrinterInfo.Align.CENTER;
myPrinterInfo.numberOfCopies = 1;
进出口使用的62mmx100mm纸卷和我得到这个错误信息：
JNI检测到的错误应用：GetStringUTFChars收到NULL的jstring 08-10 17 ：33：18.882 31333-31584/br.com.squarebits.brothertest E/art：调用GetStringUTFChars 08-10 17：33：18.882 31333-31584/br.com.squarebits.brothertest E/art：from boolean com .brother.ptouch.sdk.JNIWrapper.writeByteInFile（int []，int，java.lang.String ，布尔值） 08-10 17：33：18.882 31333-31584/br.com.squarebits.brothertest E/art：“AsyncTask＃1”prio = 5 tid = 10 Runnable 08-10 17：33：18.882 31333- 31584/br.com.squarebits.brothertest E/art：| group =“main”sCount = 0 dsCount = 0 obj = 0x12c99460 self = 0xe9594500 08-10 17：33：18.882 31333-31584/br.com.squarebits.brothertest E/art： sysTid = 31584 nice = 10 cgrp = bg_non_interactive sched = 0/0 handle = 0xe0b65930 08-10 17：33：18.882 31333-31584/br.com.squarebits.brothertest E/art： state = R schedstat =（80462688 29252686 258）utm = 5 stm = 3 core = 2 HZ = 100 08-10 17：33：18.882 31333-31584/br.com.squarebits.brothertest E/art： stack = 0xe0a63000-0xe0a65000 stackSize = 1038KB 08-10 17：33：18.882 31333-31584/br.com.squarebits.brothertest E/art：| （共享举行） 08-10 17：33：18.882 31333-31584/br.com.squarebits.brothertest E/art：native：＃00 pc 0035adcf /system/lib/libart.so（ _ZN3art15DumpNativeStackERNSt3__113basic_ostreamIcNS0_11char_traitsIcEEEEiPKcPNS_9ArtMethodEPv + 126） 08-10 17：33：18.882 31333-31584/br.com.squarebits.brothertest E /艺术：天然：＃01 PC 0033bdeb /system/lib/libart.so（_ZNK3art6Thread4DumpERNSt3__113basic_ostreamIcNS1_11char_traitsIcEEEE + 138） 08- 10 17：33：18.882 31333-31584/br.com.squarebits.brothertest E/art：native：＃02 pc 0024ef71 /system/lib/libart.so（ZN3art9JavaVMExt8JniAbortEPKcS2 +900） 08-10 17:33： 18.882 31333-31584/br.com.squarebits.brothertest E/art：native：＃03 pc 0024f607 /system/lib/libart.so（_ZN3art9JavaVMExt9JniAbortVEPKcS2_St9__va_list + 54） 08-10 17:33:18 .882 31333-31584/br.com.squarebits.brothertest E/art：native：＃04 pc 000fbe5d /system/lib/libart.so（_ZN3art11ScopedCheck6AbortFEPKcz + 28） 08-10 17：33：18.882 31333-31584/br .com.squarebits.brothertest E/art：native：＃05 pc 001003b9 /system/lib/libart.so（_ZN3art11ScopedCheck5CheckERNS_18ScopedObjectAccessEbPKcPNS_12JniValueTypeE.constprop.95 + 2676） 08-10 17：33：18.883 31333-31584/br.com。 squarebits.brothertest E /艺术：本机：＃06件00108cd5 /system/lib/libart.so（_ZN3art8CheckJNI17GetStringUTFCharsEP7_JNIEnvP8_jstringPh + 376）
如果有人知道如何解决它，请帮我:(