使用蓝牙打印机从Android应用程序打印
我正在为Android设备开发Android计费应用程序。在我的应用程序中，我必须以活动显示的特定格式打印蓝牙打印机中的收据，我在下面显示。我必须打印整个屏幕，因为我显示如下。我想知道如何识别最近的蓝牙打印机？，如何配置它们？以及如何在蓝牙打印机中打印数据。该应用程序兼容以前的版本。我搜索了很多但没有得到任何积极的回应。
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
2 个答案:
答案 0 :(得分：1)
我会告诉你我为我的应用做了什么。可能不适合你。首先，你必须使用itext 将活动转换为pdf。然后将pdf保存到sdcard.from中，你必须使用任何支持打印的应用程序打开pdf。你必须将该应用程序安装到你的设备中。我使用了PrinterShare。对我来说它的工作很好。满足了我的需求。代码如下。
Document doc = new Document();
PdfWriter docWriter = null;
DecimalFormat df = new DecimalFormat("0.00");
try {
Font bfBold12 = new Font(FontFamily.TIMES_ROMAN, 12,
Font.BOLD, new BaseColor(0, 0, 0));
Font bf12 = new Font(FontFamily.TIMES_ROMAN, 12);
String path = Environment.getExternalStorageDirectory()
.getAbsolutePath() + "/noufalpdfdemo";
File dir = new File(path);
if (!dir.exists())
dir.mkdirs();
Log.d("PDFCreator", "PDF Path: " + path);
File file = new File(dir, "sample.pdf");
docWriter = PdfWriter.getInstance(doc,
new FileOutputStream(file));
// document header attributes
doc.addAuthor("betterThanZero");
doc.addCreationDate();
doc.addProducer();
doc.addCreator("MySampleCode.com");
doc.addTitle("Report with Column Headings");
doc.setPageSize(PageSize.LETTER);
// open document
doc.open();
// create a paragraph
PdfContentByte cb = docWriter.getDirectContent();
Paragraph paragraph = new Paragraph("", FontFactory
.getFont(FontFactory.TIMES_BOLD, 24, BaseColor.RED));
paragraph.setAlignment(Element.ALIGN_CENTER);
Paragraph para = new Paragraph("INVOICE", FontFactory
.getFont(FontFactory.TIMES_BOLD, 24, BaseColor.RED));
para.setAlignment(Element.ALIGN_CENTER);
doc.add(para);
cr = db.getcustomerinvoices(getIntent().getStringExtra("i"));
String invoffitemdiscounttotal, invoffinvoicediscounttotal, invdiscount, invnettamount;
String date, time, cus_id, c_name, invoiceitem, granttotal;
cr.moveToFirst();
date = cr.getString(cr.getColumnIndex("date"));
time = cr.getString(cr.getColumnIndex("time"));
cus_id = cr.getString(cr.getColumnIndex("cus_id"));
c_name = cr.getString(cr.getColumnIndex("c_name"));
invoiceitem = cr.getString(cr.getColumnIndex("invoiceitem"));
granttotal = cr.getString(cr.getColumnIndex("granttotal"));
invoffitemdiscounttotal = cr.getString(cr
.getColumnIndex("invoffitemdiscounttotal"));
invoffinvoicediscounttotal = cr.getString(cr
.getColumnIndex("invoffinvoicediscounttotal"));
invdiscount = cr.getString(cr.getColumnIndex("Discount"));
invnettamount = cr.getString(cr.getColumnIndex("NetAmount"));
// add some detail information about the country
doc.add(new Paragraph("CUS NAME: " + c_name.trim(), bf12));
doc.add(new Paragraph("CUS ID: " + cus_id.trim(), bf12));
doc.add(new Paragraph("DATE: " + date.trim(), bf12));
doc.add(new Paragraph("INVOICE NUMBER: "
+ invoicenumber.trim(), bf12));
doc.add(Chunk.NEWLINE);
doc.add(Chunk.NEWLINE);
float[] columnWidths = { 2.5f, 1f, 2f, 2f, 2f, 2f };
// create PDF table with the given widths
PdfPTable table = new PdfPTable(columnWidths);
// set table width a percentage of the page width
table.setWidthPercentage(90f);
insertCell(table, "Item", Element.ALIGN_RIGHT, 1, bfBold12);
insertCell(table, "QTY", Element.ALIGN_LEFT, 1, bfBold12);
insertCell(table, "PRICE", Element.ALIGN_LEFT, 1, bfBold12);
insertCell(table, "TOTAL", Element.ALIGN_RIGHT, 1, bfBold12);
insertCell(table, "DISCOUNT", Element.ALIGN_LEFT, 1,
bfBold12);
insertCell(table, "TOTAL", Element.ALIGN_RIGHT, 1, bfBold12);
table.setHeaderRows(1);
// insert an empty row
// insertCell(table, "", Element.ALIGN_LEFT, 4, bfBold12);
cr = db.getcustomerinvoicetable(getIntent().getStringExtra(
"i"));
if (cr.getCount() > 0) {
cr.moveToFirst();
for (int i = 0; i < cr.getCount(); i++) {
String name = cr.getString(cr
.getColumnIndex("itemname"));
String price = cr.getString(cr
.getColumnIndex("price"));
String qty = cr.getString(cr.getColumnIndex("qty"));
String total = cr.getString(cr
.getColumnIndex("total"));
String discount = cr.getString(cr
.getColumnIndex("DiscountAmt"));
String newtotal = cr.getString(cr
.getColumnIndex("NetAmount"));
insertCell(table, name, Element.ALIGN_RIGHT, 1,
bf12);
insertCell(table, qty, Element.ALIGN_LEFT, 1, bf12);
insertCell(table, price, Element.ALIGN_LEFT, 1,
bf12);
insertCell(table, total, Element.ALIGN_RIGHT, 1,
bf12);
insertCell(table, discount, Element.ALIGN_LEFT, 1,
bf12);
insertCell(table, newtotal, Element.ALIGN_RIGHT, 1,
bf12);
cr.moveToNext();
}
// insertCell(table, "", Element.ALIGN_RIGHT, 1,
// bfBold12);
// insertCell(table, "", Element.ALIGN_RIGHT, 1,
// bfBold12);
//
// insertCell(table, "", Element.ALIGN_RIGHT, 1,
// bfBold12);
// insertCell(table, "", Element.ALIGN_RIGHT, 1,
// bfBold12);
// insertCell(table, "", Element.ALIGN_RIGHT, 1,
// bfBold12);
// insertCell(table, "", Element.ALIGN_RIGHT, 1,
// bfBold12);
insertCell(table, "", Element.ALIGN_RIGHT, 6, bfBold12);
insertCell(table, "GrandTotal:", Element.ALIGN_RIGHT,
2, bfBold12);
insertCell(table, granttotal, Element.ALIGN_LEFT, 4,
bfBold12);
insertCell(table, "OFF LINE ITEM PROMO TOTAL DISCOUNT:", Element.ALIGN_RIGHT,
2, bfBold12);
insertCell(table, invoffitemdiscounttotal, Element.ALIGN_LEFT, 4,
bfBold12);
insertCell(table, "OFF INVOICE PROMO TOTAL DISCOUNT:", Element.ALIGN_RIGHT,
2, bfBold12);
insertCell(table, invoffinvoicediscounttotal, Element.ALIGN_LEFT, 4,
bfBold12);
insertCell(table, "TOTAL DISCOUNT:", Element.ALIGN_RIGHT,
2, bfBold12);
insertCell(table, invdiscount, Element.ALIGN_LEFT, 4,
bfBold12);
insertCell(table, "NET AMOUNT:", Element.ALIGN_RIGHT,
2, bfBold12);
insertCell(table, invnettamount, Element.ALIGN_LEFT, 4,
bfBold12);
}
// repeat the same as above to display another location
insertCell(table, "", Element.ALIGN_LEFT, 6, bfBold12);
insertCell(table, "FREE GOODS REVIEW ...",
Element.ALIGN_CENTER, 6, bfBold12);
insertCell(table, "Item", Element.ALIGN_RIGHT, 1, bfBold12);
insertCell(table, "QTY", Element.ALIGN_LEFT, 1, bfBold12);
insertCell(table, "", Element.ALIGN_CENTER, 6, bfBold12);
table.setHeaderRows(1);
// insert an empty row
// insertCell(table, "GrandTotal:", Element.ALIGN_RIGHT, 3,
// bfBold12);
// insertCell(table, granttotal, Element.ALIGN_RIGHT, 1,
// bfBold12);
Cursor cr2 = db.getinvoiceextras(invoicenumber);
if (cr2.getCount() > 0) {
cr2.moveToFirst();
String fockey = cr2.getString(cr2
.getColumnIndex("fockey"));
String accrevkey = cr2.getString(cr2
.getColumnIndex("accrevkey"));
Cursor cr3 = db.getcusinvfocdatas(fockey);
if (cr3.getCount() > 0) {
cr3.moveToFirst();
for (int i = 0; i < cr3.getCount(); i++) {
String name = cr3.getString(cr3
.getColumnIndex("focitemname"));
String qty = cr3.getString(cr3
.getColumnIndex("focqty"));
insertCell(table, name, Element.ALIGN_RIGHT, 1,
bf12);
insertCell(table, qty, Element.ALIGN_LEFT, 1,
bf12);
cr3.moveToNext();
}
}
else {
Log.d("nzm",
"else for cr3:db.getcusinvfocdatas(fockey) for "
+ fockey);
}
insertCell(table, "", Element.ALIGN_LEFT, 6, bfBold12);
// insertCell(table, "", Element.ALIGN_LEFT, 4, bfBold12);
insertCell(table, "ACCOUNTS REVIEW ...",
Element.ALIGN_CENTER, 6, bfBold12);
Cursor cr4 = db.getcusinvaccrevdatas(accrevkey);
if (cr4.getCount() > 0) {
cr4.moveToFirst();
oldbalance = cr4.getString(cr4
.getColumnIndex("oldbalance"));
curosbalance = cr4.getString(cr4
.getColumnIndex("curosbalance"));
amtcollected = cr4.getString(cr4
.getColumnIndex("amtcollected"));
paymode = cr4.getString(cr4
.getColumnIndex("paymode"));
cheque = cr4.getString(cr4
.getColumnIndex("ischeque"));
bank = cr4.getString(cr4.getColumnIndex("bank"));
chequenumber = cr4.getString(cr4
.getColumnIndex("chequenumber"));
chequeamount = cr4.getString(cr4
.getColumnIndex("chequeamount"));
chequedate = cr4.getString(cr4
.getColumnIndex("chequedate"));
pdccheque = cr4.getString(cr4
.getColumnIndex("ispdc"));
bolcheque = Boolean.parseBoolean(cheque);
bolpdc = Boolean.parseBoolean(pdccheque);
insertCell(table, "OLD BALANCE",
Element.ALIGN_RIGHT, 1, bfBold12);
insertCell(table, oldbalance, Element.ALIGN_LEFT,
1, bfBold12);
// insert an empty row
insertCell(table, "", Element.ALIGN_LEFT, 4,
bfBold12);
insertCell(table, "AMT COLLECTED",
Element.ALIGN_RIGHT, 1, bfBold12);
insertCell(table, amtcollected, Element.ALIGN_LEFT,
1, bfBold12);
// insert an empty row
insertCell(table, "", Element.ALIGN_LEFT, 4,
bfBold12);
insertCell(table, "CURR_OS_BALANCE:",
Element.ALIGN_RIGHT, 1, bfBold12);
insertCell(table, curosbalance, Element.ALIGN_LEFT,
1, bfBold12);
// insert an empty row
insertCell(table, "", Element.ALIGN_LEFT, 4,
bfBold12);
insertCell(table, "PAYMODE", Element.ALIGN_RIGHT,
1, bfBold12);
insertCell(table, paymode, Element.ALIGN_LEFT, 1,
bfBold12);
// insert an empty row
insertCell(table, "", Element.ALIGN_LEFT, 4,
bfBold12);
// tvcuros.setText("" + curosbalance);
// tvoldbalance.setText(oldbalance);
// tvamtcollected.setText(amtcollected);
// tvpaymode.setText(paymode);
// tvpdccheque.setText(pdccheque);
// tvcheque.setText(cheque);
if (bolcheque) {
cheque_layout.setVisibility(View.VISIBLE);
// chequedate =
// getIntent().getExtras().getString("chequedate")
// .toString();
// tvbank.setText(bank);
// tvchequenumber.setText(chequenumber);
// tvchequeamount.setText(chequeamount);
// tvchequedate.setText(chequedate);
insertCell(table, "BANK", Element.ALIGN_RIGHT,
1, bfBold12);
insertCell(table, bank, Element.ALIGN_LEFT, 1,
bfBold12);
// insert an empty row
insertCell(table, "", Element.ALIGN_LEFT, 4,
bfBold12);
insertCell(table, "CHEQUE NO:",
Element.ALIGN_RIGHT, 1, bfBold12);
insertCell(table, chequenumber,
Element.ALIGN_LEFT, 1, bfBold12);
// insert an empty row
insertCell(table, "", Element.ALIGN_LEFT, 4,
bfBold12);
insertCell(table, "CHEQUE AMOUNT:",
Element.ALIGN_RIGHT, 1, bfBold12);
insertCell(table, chequeamount,
Element.ALIGN_LEFT, 1, bfBold12);
// insert an empty row
insertCell(table, "", Element.ALIGN_LEFT, 4,
bfBold12);
insertCell(table, "CHEQUE DATE:",
Element.ALIGN_RIGHT, 1, bfBold12);
insertCell(table, chequedate,
Element.ALIGN_LEFT, 1, bfBold12);
// insert an empty row
insertCell(table, "", Element.ALIGN_LEFT, 4,
bfBold12);
}
if (bolpdc) {
insertCell(table, "PDC CHEQUE",
Element.ALIGN_RIGHT, 1, bfBold12);
insertCell(table, pdccheque,
Element.ALIGN_LEFT, 1, bfBold12);
// insert an empty row
insertCell(table, "", Element.ALIGN_LEFT, 4,
bfBold12);
}
} else {
Log.d("nzm",
"else for cr4=db.getcusinvaccrevdatas(accrevkey) for "
+ accrevkey);
}
}
// add the PDF table to the paragraph
paragraph.add(table);
// add the paragraph to the document
doc.add(paragraph);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
doc.close();
}
String sdcard = Environment.getExternalStorageDirectory()
.getAbsolutePath() + "/noufalpdfdemo";
File dir = new File(sdcard);
// Get the text file
File file = new File(dir, "sample.pdf");
file.canRead();
// FileFinalpath = SdCardpath + "/" + Filepath + Filename;
// File file = new File(FileFinalpath);
if (file.exists()) {
Uri filepath = Uri.fromFile(file);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(filepath, "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
try {
startActivity(intent);
} catch (Exception e) {
// alert.showAlertDialog(PDF_Activity.this,
// "File Not Started...","File Not Started From SdCard ",
// false);
Log.e("error", "" + e);
}
} else {
// alert.showAlertDialog(PDF_Activity.this,
// "File Not Found...","File Not Found From SdCard ",
// false);
}
答案 1 :(得分：1)
此应用程序将文本打印到蓝牙打印机。我正在使用Android设备和蓝牙打印机。您可以轻松地将此库集成到项目中，以便打印支持蓝牙打印机。更多示例Click Here
private void print_bt() {
try {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
btoutputstream = btsocket.getOutputStream();
byte[] printformat = { 0x1B, 0x21, FONT_TYPE };
btoutputstream.write(printformat);
String msg = message.getText().toString();
btoutputstream.write(msg.getBytes());
btoutputstream.write(0x0D);
btoutputstream.write(0x0D);
btoutputstream.write(0x0D);
btoutputstream.flush();
} catch (IOException e) {
e.printStackTrace();
}
}
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