app-zj/android/app/src/main/java/io/flutter/plugins/utils/BTPPrintUtil.java

package io.flutter.plugins.utils;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;

import androidx.annotation.NonNull;

import com.snbc.sdk.LabelPrinter;

import java.io.ByteArrayOutputStream;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;

import io.flutter.plugin.common.MethodChannel;

public class BTPPrintUtil {


    /**
     * 单例实例，使用 volatile 保证多线程可见性和有序性
     */
    private static volatile LabelPrinter labelPrinter;

    private static int nLang = 2;

    /**
     * 获取 LabelPrinter 单例实例
     *
     * @return LabelPrinter 实例
     */
    public static LabelPrinter getInstance() {
        // 双重检查锁定以确保只初始化一次实例
        if (labelPrinter == null) {
            synchronized (BTPPrintUtil.class) {
                if (labelPrinter == null) {
                    labelPrinter = new LabelPrinter();
                }
            }
        }

        return labelPrinter;
    }

    /**
     * 通过打印机mac地址进行蓝牙连接开启打印机（同步）
     *
     * @param address 打印机地址
     * @return 成功与否
     */
    public static int connectBluetoothPrinter(String address) {
//        return 1;
        // 获取单例实例以确保线程安全
        return getInstance().ConnectPrinter(7, address, 4);
    }

    public static void printBitMap(Bitmap bitmap, String deviceName, @NonNull MethodChannel.Result result) {

        int x = 0;
        if(deviceName.contains("BTP-UP321")) {
            x = 0;
        } else if(deviceName.contains("BTP-P398PLUS")) {
            x = 40;
        }
        int bytes = bitmap.getByteCount();
        ByteBuffer buf = ByteBuffer.allocate(bytes);
        bitmap.copyPixelsToBuffer(buf);
        ByteArrayOutputStream LionData=new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, LionData);

        getInstance().SetLabelSize(560,640);
        int code = getInstance().PrintImageData(x, 0, LionData.toByteArray());
        getInstance().PrintLabel(1,1);
        result.success(code == 0 ? true : false);
    }

    public  static void printText(ArrayList<String> textList,@NonNull MethodChannel.Result result) {

        int width = 560;
        int height = 640;
        getInstance().SetLabelSize(width,height);

        int marginX = 2;
        int marginY = 40;
        //矩形框类型
        int rectangleWidth = width - marginX * 2;
        int rectangleHeight = height - marginY * 2;
        int lineWidth = 1;

        int lineHeight = rectangleHeight / 6;

        int titleWidth = rectangleWidth / 2;

        float fontSize = 3;
        // 设置初始偏移量
        int offsetY = 0;
        int offsetX = 0;
        // 计算绘制线条的 y 坐标
        int secondLineY = marginY + lineHeight * 2 - lineWidth + offsetY;
        int thirdLineY = marginY + lineHeight * 3 - lineWidth + offsetY;
        int fourthLineY = marginY + lineHeight * 4 - lineWidth + offsetY;
        int fiveLineY = marginY + lineHeight * 5 - lineWidth + offsetY;

        int textAlignHorizontal = 0; // 左对齐

        labelPrinter.PrintText(marginX * 2 + offsetX, marginY + offsetY, "3", textList.get(0), 0, 7, 0, 0);
        labelPrinter.PrintText(marginX * 2 + titleWidth + offsetX, marginY + offsetY, "3", textList.get(1), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, marginY + lineHeight - lineWidth + offsetY, "3", textList.get(2), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, secondLineY, "3", textList.get(3), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, thirdLineY, "3", textList.get(4), 0, 7, 0, 0);
        labelPrinter.PrintText(marginX * 2 + titleWidth + offsetX, thirdLineY, "3", textList.get(5), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, fourthLineY, "3", textList.get(6), 0, 7, 0, 0);
        labelPrinter.PrintText(marginX * 2 + titleWidth + offsetX, fourthLineY, "3", textList.get(7), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, fiveLineY, "3", textList.get(8), 0, 7, 0, 0);
        labelPrinter.PrintText(marginX * 2 + titleWidth + offsetX, fiveLineY, "3", textList.get(9), 0, 7, 0, 0);


        int code = getInstance().PrintLabel(1,1);
        result.success(code == 0 ? true : false);
    }

    public  static void printBarCodeWithText(String barCode, String text, ArrayList<String> textList,@NonNull MethodChannel.Result result) {
        getInstance().SetLabelSize(560,640*2);
        // 二维码
        labelPrinter.PrintBarcodeQR(90, 40,  0, barCode, 'M', 8, 2);

        //质量 品质 食安选项框
        labelPrinter.PrintRectangle(100, 440, 20, 20, 1);
        labelPrinter.PrintText(124, 440, "3", "质量", 0, 7, 0, 0);

        labelPrinter.PrintRectangle(220, 440, 20, 20, 1);
        labelPrinter.PrintText(244, 440, "3", "品质", 0, 7, 0, 0);

        labelPrinter.PrintRectangle(340, 440, 20, 20, 1);
        labelPrinter.PrintText(364, 440, "3", "食安", 0, 7, 0, 0);

        // 编号 labelPrinter.PrintText(100, 500, "8", "SHXM2024007404", 0, 7, 3, 0);
        labelPrinter.PrintText(120, 500, "5", text, 0, 0, 0, 0);

        //
        int width = 560;
        int height = 640;

        int marginX = 2;
        int marginY = 80;
        //矩形框类型
        int rectangleWidth = width - marginX * 2;
        int rectangleHeight = height - marginY * 2;
        int lineWidth = 1;

        int lineHeight = rectangleHeight / 6;

        int titleWidth = rectangleWidth / 2;

        float fontSize = 3;
        // 设置初始偏移量
        int offsetY = 680;
        int offsetX = 0;
        // 计算绘制线条的 y 坐标
        int secondLineY = marginY + lineHeight * 2 - lineWidth + offsetY;
        int thirdLineY = marginY + lineHeight * 3 - lineWidth + offsetY;
        int fourthLineY = marginY + lineHeight * 4 - lineWidth + offsetY;
        int fiveLineY = marginY + lineHeight * 5 - lineWidth + offsetY;

        int textAlignHorizontal = 0; // 左对齐

        labelPrinter.PrintText(marginX * 2 + offsetX, marginY + offsetY, "3", textList.get(0), 0, 7, 0, 0);
        labelPrinter.PrintText(marginX * 2 + titleWidth + offsetX, marginY + offsetY, "3", textList.get(1), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, marginY + lineHeight - lineWidth + offsetY, "3", textList.get(2), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, secondLineY, "3", textList.get(3), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, thirdLineY, "3", textList.get(4), 0, 7, 0, 0);
        labelPrinter.PrintText(marginX * 2 + titleWidth + offsetX, thirdLineY, "3", textList.get(5), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, fourthLineY, "3", textList.get(6), 0, 7, 0, 0);
        labelPrinter.PrintText(marginX * 2 + titleWidth + offsetX, fourthLineY, "3", textList.get(7), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, fiveLineY, "3", textList.get(8), 0, 7, 0, 0);
        labelPrinter.PrintText(marginX * 2 + titleWidth + offsetX, fiveLineY, "3", textList.get(9), 0, 7, 0, 0);
        //

        int code = getInstance().PrintLabel(1,1);
        result.success(code == 0 ? true : false);
    }

    // BTP打印机同时打印图标和标签只能调这个，依次printBitMap再printText会导致偶发printText不走。
    public  static  void PrintBitMapAndText(Bitmap bitmap, String deviceName, ArrayList<String> textList,@NonNull MethodChannel.Result result) {
        int x = 0;
        if(deviceName.contains("BTP-UP321")) {
            x = 0;
        } else if(deviceName.contains("BTP-P398PLUS")) {
            x = 40;
        }
        int bytes = bitmap.getByteCount();
        ByteBuffer buf = ByteBuffer.allocate(bytes);
        bitmap.copyPixelsToBuffer(buf);
        ByteArrayOutputStream LionData=new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, LionData);

        getInstance().SetLabelSize(560,640*2);
        int code = getInstance().PrintImageData(x, 0, LionData.toByteArray());


        int width = 560;
        int height = 640;

        int marginX = 2;
        int marginY = 80;
        //矩形框类型
        int rectangleWidth = width - marginX * 2;
        int rectangleHeight = height - marginY * 2;
        int lineWidth = 1;

        int lineHeight = rectangleHeight / 6;

        int titleWidth = rectangleWidth / 2;

        float fontSize = 3;
        // 设置初始偏移量
        int offsetY = 680;
        int offsetX = 0;
        // 计算绘制线条的 y 坐标
        int secondLineY = marginY + lineHeight * 2 - lineWidth + offsetY;
        int thirdLineY = marginY + lineHeight * 3 - lineWidth + offsetY;
        int fourthLineY = marginY + lineHeight * 4 - lineWidth + offsetY;
        int fiveLineY = marginY + lineHeight * 5 - lineWidth + offsetY;

        int textAlignHorizontal = 0; // 左对齐

        labelPrinter.PrintText(marginX * 2 + offsetX, marginY + offsetY, "3", textList.get(0), 0, 7, 0, 0);
        labelPrinter.PrintText(marginX * 2 + titleWidth + offsetX, marginY + offsetY, "3", textList.get(1), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, marginY + lineHeight - lineWidth + offsetY, "3", textList.get(2), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, secondLineY, "3", textList.get(3), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, thirdLineY, "3", textList.get(4), 0, 7, 0, 0);
        labelPrinter.PrintText(marginX * 2 + titleWidth + offsetX, thirdLineY, "3", textList.get(5), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, fourthLineY, "3", textList.get(6), 0, 7, 0, 0);
        labelPrinter.PrintText(marginX * 2 + titleWidth + offsetX, fourthLineY, "3", textList.get(7), 0, 7, 0, 0);


        labelPrinter.PrintText(marginX * 2 + offsetX, fiveLineY, "3", textList.get(8), 0, 7, 0, 0);
        labelPrinter.PrintText(marginX * 2 + titleWidth + offsetX, fiveLineY, "3", textList.get(9), 0, 7, 0, 0);




        getInstance().PrintLabel(1,1);
        result.success(code == 0 ? true : false);
    }
}