java - Brother SDK调用PrintImage导致JNI DETECTED ERROR IN APPLICATION : GetStringUTFChars received NULL jstring

Question

目前正在为标签打印机使用 Brother SDK，当我调用 Asset Manager 时，会出现位图，但当它被解析为打印图像时它崩溃了。

if (myPrinter.startCommunication()) {
AssetManager assetManager = getAssets();
          Bitmap bitmap = null;
          try{
              bitmap = BitmapFactory.decodeStream(new BufferedInputStream(assetManager.open("meme.bmp")));
             }catch(Exception e){
               e.printStackTrace();
             }
          PrinterStatus result = myPrinter.printImage(bitmap);
       if (result.errorCode != ErrorCode.ERROR_NONE) {
         Log.d("TAG", "ERROR - " + result.errorCode);
       }
         myPrinter.endCommunication();
}

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Answer 1

对于任何人来说，即使他们确保他们获得了写入权限也会被卡住，这与 b-PAC 试图创建的工作路径有关。

默认路径为:/storage/emulated/0/com.brother.ptouch.sdk/template

只需在PrinterInfo 对象中定义您自己的路径。设置 workPath 变量:

PrinterInfo mPrintSettings = mPrinter.getPrinterInfo();
mPrintSettings.workPath = "your/custom/work/path";

它在文档中说，如果你这样做，你甚至不需要许可。但无论如何我都会保留它。