How to Print Unsupported Character Sets with a POS Printer

From wizarPOS
Revision as of 06:40, 19 November 2018 by Mahong (talk | contribs) (→‎by Java API)

There are two ways to print html content, if your app is using our C SDK, please use the java method in JNI API, and if using our Java SDK, please use the Java method. Please add WebView.enableSlowWholeDocumentDraw() in your APP source code, because we use android webview to print html content.

Permission

android.permission.SYSTEM_ALERT_WINDOW

The app declares the permission in the manifest.

By JNI API

API Overview

PrintHtmlInterface.printHTML

void printHTML(Context context, String htmlcontent, PrinterHtmlListener listener);

Print HTML content.

Returns
context Context : The activity or application context of the APP, Not null.
htmlcontent String : The html content, Not null.
listener PrinterHtmlListener : the callback listener to process the print result, Not null.

PrintHtmlInterface.convert2Image

void convert2Image(Context context, String htmlContent, PrinterHtmlListener listener);

Convert the html content to a image, if want print, please call print api of the printer.

Returns
context Context : The activity or application context of the APP, Not null.
htmlcontent String : The html content, Not null.
listener PrinterHtmlListener : the callback listener to process the print result, Not null.

PrinterHtmlListener.onGet

void onGet(Bitmap returbitmap, int result);

Get returned bitmap.

Returns
returbitmap Bitmap : The returned bitmap.
result int: The result of get image, "2:" BITMAP_ERROR, "3:" BITMAP_SUCCESS.

PrinterHtmlListener.onFinishPrinting

void onFinishPrinting(int result);

Return after print.

Returns
result int : The result of the print,"0:" PRINT_ERROR, "1:" PRINT_SUCCESS,"2:" BITMAP_ERROR, "3:" BITMAP_SUCCESS,"4:" DEVICE_NOT_OPEN.

Sample

Please find the sample in SDK folder, \cloudpos_SDK\device\c\sample\APIdemo_JNI_AS.

by Java API

Please refer to java API Spec. in APIDemoForAar from SDK folder \cloudpos_SDK\device\java\sample\, there is a printHtml method in com.wizarpos.apidemo.action.PrinterAction.java, you can call it like this.