我使用iTextG库创建了一个pdf。现在我想通过以太网打印它。我该怎么做到这一点?使用以下行,我可以调用默认打印服务,但它不会显示我的打印机连接到以太网。在我的PC上安装驱动程序后,我可以使用Google Cloud Print服务打印pdf。任何人都可以帮我吗?
目前我正在使用以下代码:
public class MyPrintHelper {
private Context context;
public MyPrintHelper(Context context) {
this.context = context;
}
public void print() {
PrintManager printManager = (PrintManager) context.getSystemService(Context.PRINT_SERVICE);
// Set job name, which will be displayed in the print queue
String jobName = context.getString(R.string.app_name) + " Document";
// Start a print job, passing in a PrintDocumentAdapter implementation
// to handle the generation of a print document
printManager.print(jobName, new MyPrintDocumentAdapter(), null);
}
private class MyPrintDocumentAdapter extends PrintDocumentAdapter {
@Override
public void onWrite(PageRange[] pages, ParcelFileDescriptor destination, CancellationSignal cancellationSignal, WriteResultCallback callback) {
InputStream input = null;
OutputStream output = null;
try {
input = new FileInputStream(new File(context.getExternalCacheDir(), PDF_FILE_NAME));
output = new FileOutputStream(destination.getFileDescriptor());
byte[] buf = new byte[1024];
int bytesRead;
while ((bytesRead = input.read(buf)) > 0) {
output.write(buf, 0, bytesRead);
}
callback.onWriteFinished(new PageRange[]{PageRange.ALL_PAGES});
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
input.close();
output.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
@Override
public void onLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes, CancellationSignal cancellationSignal, LayoutResultCallback callback, Bundle extras) {
if (cancellationSignal.isCanceled()) {
callback.onLayoutCancelled();
return;
}
PrintDocumentInfo pdi = new PrintDocumentInfo.Builder("Name of file").setContentType(PrintDocumentInfo.CONTENT_TYPE_DOCUMENT).build();
callback.onLayoutFinished(pdi, true);
}
}
}
要使用上面的帮助程序类,我将其称为:
MyPrintHelper helper = new MyPrintHelper(getActivity());
helper.print();
我正在使用以下打印机:
https://www.amazon.in/Heyday-Thermal-Receipt-Printer-GP-U80300I/dp/B011BWM95E
答案 0 :(得分:0)
您的设备应与打印机位于同一网络中。此外,您需要确保您使用的打印机为Mopria-certified:"集成打印支持 与所有经Mopria认证的打印机兼容,占全球销售量的97%。"