我有一臺Epson打印機,並使用SDK中提供的epos2_printer(示例項目)代碼與我的應用程序集成。我已經複製相同的代碼,但它似乎從來沒有工作!Epson打印機連接失敗狀態ERR_CONN
但是,將示例項目連接到我的打印機時也是如此。
private boolean runPrintReceiptSequence() {
if (!initializeObject()) {
return false;
}
if (!createReceiptData()) {
finalizeObject();
return false;
}
if (!printData()) {
finalizeObject();
return false;
}
return true;
}
private boolean initializeObject() {
try {
final SpnModelsItem spnModel = new SpnModelsItem("TM-T82 Series", Printer.TM_T82);
final SpnModelsItem spnLang = new SpnModelsItem("ANK", Printer.MODEL_ANK);
mPrinter = new Printer(spnModel.getModelConstant(),
spnLang.getModelConstant(), this);
}
catch (Exception e) {
Log.e("Printer", e.toString());
return false;
}
mPrinter.setReceiveEventListener(this);
return true;
}
private boolean createReceiptData() {
String method = "";
Bitmap logoData = BitmapFactory.decodeResource(getResources(), R.drawable.logo_saltnpepper);
StringBuilder textData = new StringBuilder();
final int barcodeWidth = 2;
final int barcodeHeight = 100;
Date currentDate = new Date();
info.saltnpepper.ordersmart2.MenuItem currItem = null;
double price = 0;
double total = 0;
int totalQty =0;
if (mPrinter == null) {
return false;
}
try {
method = "addTextAlign";
mPrinter.addTextAlign(Printer.ALIGN_CENTER);
method = "addImage";
mPrinter.addImage(logoData, 0, 0,
logoData.getWidth(),
logoData.getHeight(),
Printer.COLOR_1,
Printer.MODE_MONO,
Printer.HALFTONE_DITHER,
Printer.PARAM_DEFAULT,
Printer.COMPRESS_AUTO);
method = "addFeedLine";
mPrinter.addFeedLine(1);
textData.append("SALT-N-PEPPER\n");
//textData.append("STORE DIRECTOR â€「 John Smith\n");
textData.append("\n");
textData.append((new SimpleDateFormat("dd/MM/yy HH:mm:ss")).format(currentDate).toString() + "\n");
//textData.append("ST# 21 OP# 001 TE# 01 TR# 747\n");
textData.append("------------------------------\n");
method = "addText";
mPrinter.addText(textData.toString());
textData.delete(0, textData.length());
if(alFinalOrder != null)
{
for(int i=0; i < alFinalOrder.size(); i++)
{
currItem = alFinalOrder.get(i);
textData.append(currItem.getName()+" "+currItem.getQty()+" "+currItem.getPrice()+"\n");
//calculate total quantity
totalQty = totalQty + currItem.getQty();
//calculate price
double dPrice = currItem.getQty()*Double.parseDouble(currItem.getPrice().substring(1));
total = total + dPrice;
total = Math.round(total*100.0)/100.0;
}
}
textData.append("------------------------------\n");
method = "addText";
mPrinter.addText(textData.toString());
textData.delete(0, textData.length());
textData.append("TOTAL "+"\n");
textData.append("TAX "+"\n");
method = "addText";
mPrinter.addText(textData.toString());
textData.delete(0, textData.length());
mPrinter.addFeedLine(2);
method = "addBarcode";
mPrinter.addBarcode("01209457",
Printer.BARCODE_CODE39,
Printer.HRI_BELOW,
Printer.FONT_A,
barcodeWidth,
barcodeHeight);
method = "addCut";
mPrinter.addCut(Printer.CUT_FEED);
}
catch (Exception e) {
//ShowMsg.showException(e, method, mContext);
return false;
}
textData = null;
return true;
}
private boolean printData() {
if (mPrinter == null) {
return false;
}
if (!connectPrinter()) {
return false;
}
PrinterStatusInfo status = mPrinter.getStatus();
dispPrinterWarnings(status);
if (!isPrintable(status)) {
Log.e("Printer", "Is not printable");
try {
mPrinter.disconnect();
}
catch (Exception ex) {
// Do nothing
}
return false;
}
try {
mPrinter.sendData(Printer.PARAM_DEFAULT);
}
catch (Exception e) {
Log.e("Printer", e.getMessage());
try {
mPrinter.disconnect();
}
catch (Exception ex) {
// Do nothing
}
return false;
}
return true;
}
private boolean connectPrinter() {
boolean isBeginTransaction = false;
if (mPrinter == null) {
return false;
}
try {
mPrinter.connect("TCP:"+mIP, Printer.PARAM_DEFAULT);
}
catch (Epos2Exception e) {
//ShowMsg.showException(e, "connect", this);
if(e.getErrorStatus() == Epos2Exception.ERR_CONNECT)
{
Log.e("testing", "error connect");
}
if(e.getErrorStatus() == Epos2Exception.ERR_ALREADY_OPENED)
{
Log.e("testing", "already open");
}
if(e.getErrorStatus() == Epos2Exception.ERR_ALREADY_USED)
{
Log.e("testing", "already used");
}
if(e.getErrorStatus() == Epos2Exception.ERR_BOX_CLIENT_OVER)
{
Log.e("testing", "box client over");
}
if(e.getErrorStatus() == Epos2Exception.ERR_BOX_COUNT_OVER)
{
Log.e("testing", "count over");
}
if(e.getErrorStatus() == Epos2Exception.ERR_DISCONNECT)
{
Log.e("testing", "disconnect");
}
if(e.getErrorStatus() == Epos2Exception.ERR_FAILURE)
{
Log.e("testing", "failure");
}
if(e.getErrorStatus() == Epos2Exception.ERR_ILLEGAL)
{
Log.e("testing", "illegal");
}
if(e.getErrorStatus() == Epos2Exception.ERR_IN_USE)
{
Log.e("testing", "in use");
}
if(e.getErrorStatus() == Epos2Exception.ERR_MEMORY)
{
Log.e("testing", "memory");
}
return false;
}
try {
mPrinter.beginTransaction();
isBeginTransaction = true;
}
catch (Exception e) {
Log.e("Printer", e.toString());
}
if (isBeginTransaction == false) {
try {
mPrinter.disconnect();
}
catch (Epos2Exception e) {
// Do nothing
return false;
}
}
return true;
}
它總是給我例外ERROR_CONNECT on printer.connect內connectprinter功能。
我在做什麼錯?
此代碼可以正常使用示例應用程序。 P.S:我試圖在連接示例應用程序之前連接此應用程序,以檢查示例應用程序是否保持連接並且不允許其他應用程序連接,但情況並非如此。愛普生幫助無法提供任何進一步的幫助。
我的AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="xyz"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="21"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/icon"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MenuActivity" >
</activity>
<activity
android:name=".SaltnPepperActivity"
android:label="@string/title_activity_saltn_pepper" >
</activity>
<activity
android:name=".FinalOrder"
></activity>
<activity
android:name=".ZinVietActivity"
>
</activity>
<activity
android:name="com.epson.epos2_printer.DiscoverActivity"
></activity>
</application>
你使用的是什麼模式USB OTG等 – Killer
如果你得到連接錯誤請確保你使用的是正確的型號名稱和其他常量。如果您使用的是微型USB,請確保您獲得了類似tcp的tcp路徑://../../usb1此信息可以通過SDK doc和示例應用程序 – Killer