在 Brother SDK 上的应用程序中检测到 JNI 错误

Posted 2023-04-15

【中文标题】在 Brother SDK 上的应用程序中检测到 JNI 错误

【英文标题】：JNI DETECTED ERROR IN APPLICATION on Brother SDK

【发布时间】：2018-01-19 06:29:00

【问题描述】：

我正在尝试在我的应用程序中打印 Brother SDK 中的图像。

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;

我使用的是 62mmx100mm 纸卷，我收到以下错误消息：

在应用程序中检测到 JNI 错误：GetStringUTFChars 收到 NULL 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, boolean ) 08-10 17:33:18.882 31333-31584/br.com.squarebits.brothertest E/art：“AsyncTask #1”prio=5 tid=10 可运行 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 句柄=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: |堆栈=0xe0a63000-0xe0a65000 堆栈大小=1038KB 08-10 17:33:18.882 31333-31584/br.com.squarebits.brothertest E/art: |持有互斥锁=“mutator lock”（共享持有） 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/art: native: #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[phone]: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/art: native: #06 pc 00108cd5 /system/lib/libart.so (_ZN3art8CheckJNI17GetStringUTFCharsEP7_JNIEnvP8_jstringPh+376)

如果有人知道如何解决它，请帮助我:(

【参考方案1】：

我今天遇到了类似的问题，原来没有授予 android.permission.WRITE_EXTERNAL_STORAGE 权限。如果您在 Android 6 或更高版本上运行，请检查您的 run time permissions 是否写入外部存储。在清单中声明权限是不够的。兄弟文档在其manual 的末尾暗示了这一点。

8.3。 Android 6 兼容性 从 Android 6.0 开始，用户可以在安装后更改应用程序的权限。允许 必须授予访问 Android 外部存储的权限才能使用它 应用。

【讨论】：

很棒的发现，以如此糟糕的方式处理这个问题让兄弟感到羞耻 - 没有任何有用的信息或任何东西。