我关注了Epson SDK用于 android 热敏打印收据...

因此，我得到的不是文本，而是一些包含整个图像的图像。 在 Logoimage(商店)部分.. 如下所示

这里的 Store 是 Logoimage Insted 我已经给了我的 Recipt(Image) 所以我得到了上面的那样..它没有打印全尺寸...

这是我的代码

public class MainActivity extends Activity implements View.OnClickListener, ReceiveListener {

private Context mContext = null;
private EditText mEditTarget = null;
private Spinner mSpnSeries = null;
private Spinner mSpnLang = null;
private Printer  mPrinter = null;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mContext = this;

    int[] target = {
        R.id.btnDiscovery,
        R.id.btnSampleReceipt,
   };

    for (int i = 0; i < target.length; i++) {
        Button button = (Button)findViewById(target[i]);
        button.setOnClickListener(this);
    }

    mSpnSeries = (Spinner)findViewById(R.id.spnModel);
    ArrayAdapter<SpnModelsItem> seriesAdapter = new ArrayAdapter<SpnModelsItem>(this, android.R.layout.simple_spinner_item);
    seriesAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    seriesAdapter.add(new SpnModelsItem(getString(R.string.printerseries_t20), Printer.TM_T20));
    mSpnSeries.setAdapter(seriesAdapter);
    mSpnSeries.setSelection(0);

    try {
        Log.setLogSettings(mContext, Log.PERIOD_TEMPORARY, Log.OUTPUT_STORAGE, null, 0, 1, Log.LOGLEVEL_LOW);
    }
    catch (Exception e) {
        ShowMsg.showException(e, "setLogSettings", mContext);
    }
    mEditTarget = (EditText)findViewById(R.id.edtTarget);
}

@Override
protected void onActivityResult(int requestCode, final int resultCode, final Intent data) {
    if (data != null && resultCode == RESULT_OK) {
        String target = data.getStringExtra(getString(R.string.title_target));
        if (target != null) {
            EditText mEdtTarget = (EditText)findViewById(R.id.edtTarget);
            mEdtTarget.setText(target);
        }
    }
}

@Override
public void onClick(View v) {
    Intent intent = null;

    switch (v.getId()) {
        case R.id.btnDiscovery:
            intent = new Intent(this, DiscoveryActivity.class);
            startActivityForResult(intent, 0);
            break;

        case R.id.btnSampleReceipt:
            updateButtonState(false);
            if (!runPrintReceiptSequence()) {
                updateButtonState(true);
            }
            break;

        case R.id.btnSampleCoupon:
            updateButtonState(false);
            if (!runPrintCouponSequence()) {
                updateButtonState(true);
            }
            break;

        default:
            // Do nothing
            break;
    }
}

private boolean runPrintReceiptSequence() {
    if (!initializeObject()) {
        return false;
    }

    if (!createReceiptData()) {
        finalizeObject();
        return false;
    }

    if (!printData()) {
        finalizeObject();
        return false;
    }

    return true;
}

private boolean createReceiptData() {
    String method = "";
    Bitmap logoData = BitmapFactory.decodeResource(getResources(), R.drawable.store);
    StringBuilder textData = new StringBuilder();
    final int barcodeWidth = 2;
    final int barcodeHeight = 100;

    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("EPSON PRINT DEMO TEST - (HYD)\n");
        textData.append("STORE DIRECTOR – MLN\n");
        textData.append("\n");
        textData.append("07/06/12 09:15 012 0191 134\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());

        textData.append("524 3 CUP BLK TEAPOT    9.99 R\n");
        textData.append("003 WESTGATE BLACK 25  59.99 R\n");
        textData.append("------------------------------\n");
        method = "addText";
        mPrinter.addText(textData.toString());
        textData.delete(0, textData.length());

        textData.append("SUBTOTAL                69.98\n");
        textData.append("TAX                      14.43\n");
        method = "addText";
        mPrinter.addText(textData.toString());
        textData.delete(0, textData.length());

        method = "addTextSize";
        mPrinter.addTextSize(2, 2);
        method = "addText";
        mPrinter.addText("TOTAL    84.41\n");
        method = "addTextSize";
        mPrinter.addTextSize(1, 1);
        method = "addFeedLine";
        mPrinter.addFeedLine(1);

        textData.append("CASH                    200.00\n");
        textData.append("CHANGE                   78.14\n");
        textData.append("------------------------------\n");
        method = "addText";
        mPrinter.addText(textData.toString());
        textData.delete(0, textData.length());

        textData.append("Purchased item total number\n");
        textData.append("Sign Up and Save !\n");
        textData.append("With Preferred Saving Card\n");

        method = "addText";
        mPrinter.addText(textData.toString());
        textData.delete(0, textData.length());
        method = "addFeedLine";
        mPrinter.addFeedLine(2);

        method = "addCut";
        mPrinter.addCut(Printer.CUT_FEED);


    }
    catch (Exception e) {
        ShowMsg.showException(e, method, mContext);
        return false;
    }

    textData = null;

    return true;
}

private boolean runPrintCouponSequence() {
    if (!initializeObject()) {
        return false;
    }

    if (!createCouponData()) {
        finalizeObject();
        return false;
    }

    if (!printData()) {
        finalizeObject();
        return false;
    }

    return true;
}


private boolean printData() {
    if (mPrinter == null) {
        return false;
    }

    if (!connectPrinter()) {
        return false;
    }

    PrinterStatusInfo status = mPrinter.getStatus();

    dispPrinterWarnings(status);

    if (!isPrintable(status)) {
        ShowMsg.showMsg(makeErrorMessage(status), mContext);
        try {
            mPrinter.disconnect();
        }
        catch (Exception ex) {
            // Do nothing
        }
        return false;
    }

    try {
        mPrinter.sendData(Printer.PARAM_DEFAULT);
    }
    catch (Exception e) {
        ShowMsg.showException(e, "sendData", mContext);
        try {
            mPrinter.disconnect();
        }
        catch (Exception ex) {
            // Do nothing
        }
        return false;
    }

    return true;
}

private boolean initializeObject() {
    try {
        mPrinter = new Printer(((SpnModelsItem) mSpnSeries.getSelectedItem()).getModelConstant(),
                               ((SpnModelsItem) mSpnLang.getSelectedItem()).getModelConstant(),
                               mContext);
    }
    catch (Exception e) {
        ShowMsg.showException(e, "Printer", mContext);
        return false;
    }

    mPrinter.setReceiveEventListener(this);

    return true;
}

private void finalizeObject() {
    if (mPrinter == null) {
        return;
    }

    mPrinter.clearCommandBuffer();

    mPrinter.setReceiveEventListener(null);

    mPrinter = null;
}

private boolean connectPrinter() {
    boolean isBeginTransaction = false;

    if (mPrinter == null) {
        return false;
    }

    try {
        mPrinter.connect(mEditTarget.getText().toString(), Printer.PARAM_DEFAULT);
    }
    catch (Exception e) {
        ShowMsg.showException(e, "connect", mContext);
        return false;
    }

    try {
        mPrinter.beginTransaction();
        isBeginTransaction = true;
    }
    catch (Exception e) {
        ShowMsg.showException(e, "beginTransaction", mContext);
    }

    if (isBeginTransaction == false) {
        try {
            mPrinter.disconnect();
        }
        catch (Epos2Exception e) {
            // Do nothing
            return false;
        }
    }

    return true;
}

private void disconnectPrinter() {
    if (mPrinter == null) {
        return;
    }

    try {
        mPrinter.endTransaction();
    }
    catch (final Exception e) {
        runOnUiThread(new Runnable() {
            @Override
            public synchronized void run() {
                ShowMsg.showException(e, "endTransaction", mContext);
            }
        });
    }

    try {
        mPrinter.disconnect();
    }
    catch (final Exception e) {
        runOnUiThread(new Runnable() {
            @Override
            public synchronized void run() {
                ShowMsg.showException(e, "disconnect", mContext);
            }
        });
    }

    finalizeObject();
}

private boolean isPrintable(PrinterStatusInfo status) {
    if (status == null) {
        return false;
    }

    if (status.getConnection() == Printer.FALSE) {
        return false;
    }
    else if (status.getOnline() == Printer.FALSE) {
        return false;
    }
    else {
        ;//print available
    }

    return true;
}

private String makeErrorMessage(PrinterStatusInfo status) {
    String msg = "";

    if (status.getBatteryLevel() == Printer.BATTERY_LEVEL_0) {
        msg += getString(R.string.handlingmsg_err_battery_real_end);
    }

    return msg;
}

private void dispPrinterWarnings(PrinterStatusInfo status) {
    EditText edtWarnings = (EditText)findViewById(R.id.edtWarnings);
    String warningsMsg = "";

    if (status == null) {
        return;
    }

    if (status.getPaper() == Printer.PAPER_NEAR_END) {
        warningsMsg += getString(R.string.handlingmsg_warn_receipt_near_end);
    }

    if (status.getBatteryLevel() == Printer.BATTERY_LEVEL_1) {
        warningsMsg += getString(R.string.handlingmsg_warn_battery_near_end);
    }

    edtWarnings.setText(warningsMsg);
}

private void updateButtonState(boolean state) {
    Button btnReceipt = (Button)findViewById(R.id.btnSampleReceipt);
    Button btnCoupon = (Button)findViewById(R.id.btnSampleCoupon);
    btnReceipt.setEnabled(state);
    btnCoupon.setEnabled(state);
}

@Override
public void onPtrReceive(final Printer printerObj, final int code, final PrinterStatusInfo status, final String printJobId) {
    runOnUiThread(new Runnable() {
        @Override
        public synchronized void run() {
            ShowMsg.showResult(code, makeErrorMessage(status), mContext);

            dispPrinterWarnings(status);

            updateButtonState(true);

            new Thread(new Runnable() {
                @Override
                public void run() {
                    disconnectPrinter();
                }
            }).start();
        }
    });
}
}

任何人都可以建议我在哪里调整图像的大小，以便我应该打印页面区域而不是 Logo 大小...

这是图像内容数据 图片

String method = "";
Bitmap logoData = BitmapFactory.decodeResource(getResources(), R.drawable.store);
//I have given this  Bitmap logoData = BitmapFactory.decodeResource(getResources(), R.drawable.full);

这是图片内容..

   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);

请建议如何以全尺寸打印图像内容... 我正在获取页面的一侧..

它应该打印 80 毫米的尺寸，但它的打印尺寸为 40 毫米，任何人都可以建议我如何将其制作成全尺寸或如何调整图像的尺寸以将其拉伸(stretch)到最大纸张区域...

最佳答案

你的问题有点不清楚。

我认为你的问题是:

• 您将获得某种分辨率的图像数据，作为 Android BitMapFactory。
• 您想在某台打印机上使用另一个 DPI 进行打印。图像的 Android BitMapFactory 已设置。
• 您需要为您的 Logo 缩放 BitMapFactory。

首先，在获取 Logo 数据的行中，您可以尝试探索选项 BitmapFactory.Options.inSampleSize 以获得正确的大小。这会给你一个更好但不是完美的答案。

为了完美，您应该缩放 Logo 。您可以使用代码 here .另见相关问题here和 here .

关于android - 如何在热敏打印机 (EPSON) 中以全尺寸 (80MM) 打印图像，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38138602/