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[英]How to print image with text from android phone to Bluetooth printer.?
[英]Print Image from drawable folder to Bluetooth Printer - Android
我正在嘗試使用輸出流將JPEG圖像打印到Zebra藍牙打印機。
我的文字可以正常工作,但無法打印圖像。 我已經在下面包含了我嘗試過的代碼。
編輯:我現在已經創建了一個字節數組,所以我只需要知道如何將字節數組打印到輸出流即可。
btoutputstream = btsocket.getOutputStream();
byte[] printformat = {0x1B, 0x21, FONT_TYPE};
btoutputstream.write(printformat);
String t_line1 = "! 0 100 100 185 1\r\n";
String t_line2 = "PCX 80 30\r\n";
String t_line3 = "PRINT\r\n";
try {
Drawable d = ContextCompat.getDrawable(getActivity(), R.drawable.image);
Bitmap bitmap = ((BitmapDrawable)d).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte[] bitmapdata = stream.toByteArray();
btoutputstream.write(t_line1.getBytes());
btoutputstream.write(t_line2.getBytes());
btoutputstream.write(bitmapdata);
btoutputstream.write(t_line3.getBytes());
}catch(Exception e) {
}
btoutputstream.flush();
try {
Drawable d = ContextCompat.getDrawable(getActivity(), R.drawable.image);
Bitmap bitmap = ((BitmapDrawable)d).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
PrintPic printPic = PrintPic.getInstance();
printPic.init(bitmap);
byte[] bitmapdata = printPic.printDraw();
btoutputstream.write(t_line1.getBytes());
btoutputstream.write(t_line2.getBytes());
btoutputstream.write(bitmapdata);
btoutputstream.write(t_line3.getBytes());
} catch (Exception e) {
}
btoutputstream.flush();
要打印圖像,請使用PrintHelper 。 如果您需要文本和圖像作為文檔,請使用PrintManager 。
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