C API Samples

JNI Samples

Printer

The calling sequence is open>query_status>begin>write>end>close. Please notice that:

• write method is used for printing content.
• print content should be between begin method and end method.
• query_status should be between open method and close method, but should not be between begin method and end method

The following code shows how to print some content:

 int result = PrinterInterface.open();
 if (result <0){
   return;
 }
 Bitmap bitmap = BitmapFactory.decodeResource(mContext.getResources(),
               R.drawable.printer_barcode_low);
 byte[] arryBeginText = null;
 byte[] arryEndText = null;
 try {
   arryBeginText = mContext.getResources().getString(R.string.print_QR_code).getBytes("GB2312");
   arryEndText = "This is a Bitmap of Barcode".getBytes("GB2312");
 } catch (UnsupportedEncodingException e) {
   e.printStackTrace();
 }
 int result = PrinterInterface.begin();
 if (result <0){
   return;
 }
 result = PrinterInterface.write(arryBeginText, arryBeginText.length);
 if (result <0){
   return;
 }
 // print line break
 writeLineBreak(2);       
 PrinterBitmapUtil.printBitmap(bitmap, 0, 0, true);
 // print line break
 writeLineBreak(2);
 // print text
 write(arryEndText);
 // print line break
 writeLineBreak(2);
 result = PrinterInterface.end();
 if (result <0){
   return;
 }
PrinterInterface.close();