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    <p><strong>EDIT</strong>: Update based on reading your question: <a href="https://stackoverflow.com/questions/16597789/print-bitmap-on-esc-pos-printer-java">https://stackoverflow.com/questions/16597789/print-bitmap-on-esc-pos-printer-java</a></p> <p>I will assume that the printer you are printing to is the same as above, i.e. the Rego Thermal Printer. This, as you note, support the <a href="http://www.zlgmcu.com/ZLG/Print/pdf/ZLG-ESCPOS_en.pdf" rel="nofollow noreferrer">ESC/POS Page Description Language</a>.</p> <hr> <p>Printers interpret data streamed to them as either a marked up document (in a similar way to how browser interpret HTML). In some cases, the printer literally runs the document as a program (eg PostScript). Link: <a href="https://en.wikipedia.org/wiki/Page_description_language" rel="nofollow noreferrer">Page Description Languages</a>.</p> <p>Common languages are: </p> <ul> <li><strong>Yours</strong>: <a href="http://www.zlgmcu.com/ZLG/Print/pdf/ZLG-ESCPOS_en.pdf" rel="nofollow noreferrer">ESC/POS</a>.</li> <li><a href="https://en.wikipedia.org/wiki/PostScript" rel="nofollow noreferrer">PostScript</a></li> <li><a href="https://en.wikipedia.org/wiki/Printer_Command_Language" rel="nofollow noreferrer">PCL</a></li> <li><a href="https://en.wikipedia.org/wiki/Zebra_(programming_language)" rel="nofollow noreferrer">ZPL</a></li> </ul> <p>You need to read the specifications for your printer to determine which language to use - if you need to support <em>any</em> printer, then you have a very large job ahead of you :(</p> <p>In ESC/POS, you will need to use the <code>GS v 0</code> command (documented on p33). You do this by sending the the characters <code>0x1D7630</code> across the serial link, followed by a set of arguments:</p> <pre><code>ASCII: Gs v 0 Decimal: 29 118 48 m xL xH yL yH [d]k Hexadecimal: 1D 76 30 m xL xH yL yH [d]k </code></pre> <p>Parameter definitions: </p> <ul> <li>m: <ul> <li>0,48: normal mode (1:1 scale)</li> <li>1,49: double-width</li> <li>2,50: double-height</li> <li>3,51: double-width + double-height </li> </ul></li> <li>xL, xH specifies (xL + xH × 256) bytes in horizontal direction for the bit image. </li> <li>yL, yH specifies (yL + yH × 256) dots in vertical direction for the bit image. </li> <li>[d]k specifies the bit image data (raster format). </li> <li>k indicates the number of bit image data. k is an explanation parameter; therefore, it does not need to be transmitted. </li> </ul> <p>Notes:</p> <ul> <li>When data [d]k is 1 specifies a bit printed to 1 and not printed to 0. </li> <li>If a raster bit image exceeds one line of print area, the excess data is not printed. </li> <li>This command executes paper feed for amount needed for printing the bit image regardless of the settings by ESC 2 or ESC 3. </li> <li>After printing the bit image, this command sets the print position to the beginning of the line, and clears up the buffer. </li> <li>When this command is executed, the data is transmitted and printed synchronously. So no other printing command is required.</li> </ul> <p>There are several more extensive expositions:</p> <ul> <li><a href="http://nicholas.piasecki.name/blog/2009/12/sending-a-bit-image-to-an-epson-tm-t88iii-receipt-printer-using-c-and-escpos/" rel="nofollow noreferrer">http://nicholas.piasecki.name/blog/2009/12/sending-a-bit-image-to-an-epson-tm-t88iii-receipt-printer-using-c-and-escpos/</a></li> <li><a href="https://stackoverflow.com/a/14099717/1395668">On SO in C#</a>. While not Java, it is close enough to be a template.</li> </ul> <hr> <p>Unfortunately there is no printer API in Android. If you feel strongly about this, do follow these issues:</p> <ul> <li><a href="https://code.google.com/p/android/issues/detail?id=40486" rel="nofollow noreferrer">https://code.google.com/p/android/issues/detail?id=40486</a></li> <li><a href="https://code.google.com/p/android/issues/detail?id=1148" rel="nofollow noreferrer">https://code.google.com/p/android/issues/detail?id=1148</a></li> </ul>
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    1. POHow can I print an image on a Bluetooth printer in Android?
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    1. USAndrew Alcock
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    1. COThanks for your answer... Just right now I'm printing a little part of the image, my printer is ESC/POS commands compatible, and has a 576 dost/line resolution... I found [this](http://android-essential-devtopics.blogspot.com/2013/02/sending-bit-image-to-epson-printer.html), is a java traduction for the Nicholas Piasecki's post... I implemented that source in my project, so now i'm printing a little part if my image... But anyway it can't print the complete image. I think that is a bad command use, I'm using this command for initialize the printer in the Graphic mode: `0x1B, 0x2A, 33, -128, 0`
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      1. USLeonardo Sapuy
    2. COBut I think that I'm doing it wrong... My image has a 576 x 96 pixels resolution, could you tell me if I'm doing right the printer init, or what I have to change in the code??
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      1. USLeonardo Sapuy
    3. COI'm about to go to bed, but it would be very useful if you could give a more comprehensive description of what is and is not happening. For example, how many lines of output are produced? Is the full width printed on each line? Are the lines printed pixel perfect or wrong? Can you show a hex-dump of the data sent to the printer?
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