BrotherPrintLibraryV3 0.0.351

BrotherPrintLibrary

This library provides bindings to the Brother Mobile SDK.

Two variations of the library are published for the two suported major versions.

• BrotherPrintLibraryV3
• BrotherPrintLibraryV4

Minimal changes are made to the library, and code samples from Brother should generally work without any issues.

Get started

On Android, you need to grant these permissions (could be narrower, but I've never tested it out~):

Platforms/Android/MainApplication.cs

[assembly: UsesPermission(Android.Manifest.Permission.Bluetooth)]
[assembly: UsesPermission(Android.Manifest.Permission.BluetoothAdmin)]
[assembly: UsesPermission(Android.Manifest.Permission.BluetoothScan)]
[assembly: UsesPermission(Android.Manifest.Permission.BluetoothConnect)]
[assembly: UsesPermission(Android.Manifest.Permission.AccessNetworkState)]
[assembly: UsesPermission(Android.Manifest.Permission.AccessWifiState)]
[assembly: UsesPermission(Android.Manifest.Permission.Internet)]
[assembly: UsesPermission(Android.Manifest.Permission.AccessCoarseLocation)]
[assembly: UsesPermission(Android.Manifest.Permission.AccessFineLocation)]
[assembly: UsesPermission(Android.Manifest.Permission.WriteExternalStorage)]

Code example for BrotherPrintLibraryV3, to print out basic text and QR code is provided below.

var printer = new Printer();
printer.SetBluetooth(BluetoothAdapter.DefaultAdapter);

var scaleFactor = 4;
var baseTextSize = 150;
var basePadding = 20;
var baseQrSize = 256;

printer.SetPrinterInfo(new PrinterInfo
{
    WorkPath = Android.App.Application.Context.CacheDir?.ToString(),
    PrinterModel = PrinterInfo.Model.PtP710bt,
    MacAddress = "<SCAN_TO_RETRIEVE>",
    LocalName = "<SCAN_TO_RETRIEVE>",
    LabelNameIndex = LabelInfo.LabelColor.Red!.Id,
    IsAutoCut = true,
    IsLabelEndCut = true,
    IsHalfCut = false,
    IsSpecialTape = false,
    IsCutAtEnd = true,
    IsCutMark = true,
});

var qr = new ZXing.Android.BarcodeWriter
{
    Format = BarcodeFormat.QR_CODE,
    Options = new ZXing.Common.EncodingOptions
    {
        Margin = 2,
        Width = baseQrSize * scaleFactor,
        Height = baseQrSize * scaleFactor
    }
};

var qrBitmap = qr.WriteAsBitmap("https://www.example.com");

var textPaint = new Paint
{
    Color = Color.Black,
    SubpixelText = true,
    AntiAlias = true,
    TextSize = baseTextSize * scaleFactor,
};

var textToDraw = "https://example.com";
var textBounds = new Android.Graphics.Rect();
textPaint.GetTextBounds(textToDraw, 0, textToDraw.Length, textBounds);

int padding = 20 * scaleFactor;

var landscapeBitmap = Bitmap.CreateBitmap(
    qrBitmap.Width + textBounds.Width() + padding * 2,
    qrBitmap.Height,
    Bitmap.Config.Argb8888
);

var landscapeCanvas = new Canvas(landscapeBitmap);
landscapeCanvas.DrawColor(Color.White);
landscapeCanvas.DrawBitmap(qrBitmap, 0, 0, null);

float textY = (landscapeBitmap.Height + textBounds.Height()) / 2.0f;
landscapeCanvas.DrawText(textToDraw, qrBitmap.Width + padding, textY, textPaint);

var matrix = new Android.Graphics.Matrix();
matrix.PostRotate(90);

var finalBitmap = Bitmap.CreateBitmap(
    landscapeBitmap,
    0,
    0,
    landscapeBitmap.Width,
    landscapeBitmap.Height,
    matrix,
    true
);

var output = printer.PrintImage(finalBitmap);

Copyright

Copyright 2025 Brother Mobile Solutions