react-native-xprinter-mirfalahtech/android/src/main/java/com/mirfalahtech/xprinter/RNXNetprinter.java

package com.mirfalahtech.xprinter;

import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.graphics.Matrix;
import android.os.IBinder;
import android.util.Log;
import java.util.Set;

import android.graphics.Bitmap;
import android.os.Handler;
import android.os.Message;

import android.graphics.BitmapFactory;
import android.util.Base64;

import com.facebook.react.bridge.Arguments;
import com.facebook.react.bridge.Promise;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.bridge.ReactMethod;
import com.facebook.react.bridge.WritableArray;
import com.facebook.react.bridge.WritableMap;

import net.posprinter.posprinterface.IMyBinder;

import com.mirfalahtech.xprinter.StringUtils;
import com.zxy.tiny.Tiny;
import com.zxy.tiny.callback.BitmapCallback;

import net.posprinter.posprinterface.ProcessData;
import net.posprinter.posprinterface.UiExecute;
import net.posprinter.service.PosprinterService;
import net.posprinter.utils.BitmapToByteData;
import net.posprinter.utils.DataForSendToPrinterPos58;
import net.posprinter.utils.DataForSendToPrinterPos80;
import net.posprinter.utils.PosPrinterDev;

import java.util.ArrayList;
import java.util.List;

import static android.content.Context.BIND_AUTO_CREATE;

public class RNXNetprinter extends ReactContextBaseJavaModule {
  private String LOG_TAG = "RNXNetprinter";
  private ReactApplicationContext context;

  private byte[] mBuffer = new byte[0];

  // Net
  public static IMyBinder binder;
  public static boolean ISCONNECT;

//bindService connection
ServiceConnection conn= new ServiceConnection() {
    @Override
    public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
        //Bind successfully
        binder= (IMyBinder) iBinder;
        Log.e("binder","connected");
    }

    @Override
    public void onServiceDisconnected(ComponentName componentName) {
        Log.e("disbinder","disconnected");
    }
};

  public RNXNetprinter(ReactApplicationContext reactContext) {
    super(reactContext);

    this.context = reactContext;

    Intent intent=new Intent(this.context, PosprinterService.class);
    this.context.bindService(intent, conn, BIND_AUTO_CREATE);
    Log.v(LOG_TAG, "RNXNetprinter alloc");
  }

  @Override
  public String getName() {
    return "RNXNetprinter";
  }

  @ReactMethod
  public void connectPrinter(String address, final Promise promise){
    binder.connectNetPort(address,9100, new UiExecute() {
      @Override
      public void onsucess() {

          ISCONNECT=true;
          //in this ,you could call acceptdatafromprinter(),when disconnect ,will execute onfailed();
          binder.acceptdatafromprinter(new UiExecute() {
              @Override
              public void onsucess() {
                promise.resolve(true);
              }

              @Override
              public void onfailed() {
                  ISCONNECT=false;
                  promise.reject("-105", "Device address not exist.");
              }
          });
      }

      @Override
      public void onfailed() {
        ISCONNECT=false;
        promise.reject("-105", "Device address not exist.");
      }
    });
  }

  @ReactMethod
  public void pushText(String text, final int size){

      final String tempText = text;
    binder.writeDataByYouself(
      new UiExecute() {
          @Override
          public void onsucess() {
              Log.v(LOG_TAG, "pushText onsucess");
          }

          @Override
          public void onfailed() {
              Log.v(LOG_TAG, "pushText onfailed");
          }
      }, new ProcessData() {
          @Override
          public List<byte[]> processDataBeforeSend() {

              List<byte[]> list=new ArrayList<byte[]>();
              //creat a text ,and make it to byte[],
              String str=tempText;
              if (str.equals(null)||str.equals("")){
              }else {
                  //initialize the printer
//                            list.add( DataForSendToPrinterPos58.initializePrinter());
                  list.add(DataForSendToPrinterPos80.initializePrinter());
                  byte[] data1= StringUtils.strTobytes(str);
                  list.add(PrinterCommands.ESC_ALIGN_CENTER);
                  list.add(DataForSendToPrinterPos80.selectCharacterSize(size));
                  list.add(data1);
                  //should add the command of print and feed line,because print only when one line is complete, not one line, no print
                  list.add(DataForSendToPrinterPos80.printAndFeedLine());
                  return list;
              }
              return null;
          }
      }
    );
  }


  private Bitmap b1;//grey-scale bitmap
  private  Bitmap b2;//compress bitmap

  @ReactMethod
  private void printImage(String base64img, final int width){
    byte [] bytes = Base64.decode(base64img, Base64.DEFAULT);                
    Bitmap b = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
    
    if (b != null) {
      b1=convertGreyImg(b);
      Message message=new Message();
      message.what=1;
      handler.handleMessage(message);

      //compress the bitmap
      Tiny.BitmapCompressOptions options = new Tiny.BitmapCompressOptions();
      Tiny.getInstance().source(b1).asBitmap().withOptions(options).compress(new BitmapCallback() {
          @Override
          public void callback(boolean isSuccess, Bitmap bitmap) {
              if (isSuccess){
  //                            Toast.makeText(PosActivity.this,"bitmap: "+bitmap.getByteCount(),Toast.LENGTH_LONG).show();
                  b2=bitmap;
                  b2=resizeImage(b2,width,false);
                  Message message=new Message();
                  message.what=2;
                  handler.handleMessage(message);
              }


          }
      });
    }
  }

    public static Bitmap resizeImage(Bitmap bitmap, int w,boolean ischecked)
    {

        Bitmap BitmapOrg = bitmap;
        Bitmap resizedBitmap = null;
        int width = BitmapOrg.getWidth();
        int height = BitmapOrg.getHeight();
        if (width<=w) {
            return bitmap;
        }
        if (!ischecked) {
            int newWidth = w;
            int newHeight = height*w/width;

            float scaleWidth = ((float) newWidth) / width;
            float scaleHeight = ((float) newHeight) / height;

            Matrix matrix = new Matrix();
            matrix.postScale(scaleWidth, scaleHeight);
            // if you want to rotate the Bitmap
            // matrix.postRotate(45);
            resizedBitmap = Bitmap.createBitmap(BitmapOrg, 0, 0, width,
                    height, matrix, true);
        }else {
            resizedBitmap=Bitmap.createBitmap(BitmapOrg, 0, 0, w, height);
        }

        return resizedBitmap;
    }

  private void printpicCode(final Bitmap printBmp){
    binder.writeDataByYouself(new UiExecute() {
      @Override
      public void onsucess() {
          Log.v(LOG_TAG, "printpicCode onsucess");
      }

      @Override
      public void onfailed() {
          Log.v(LOG_TAG, "printpicCode onfailed");
      }
    }, new ProcessData() {
        @Override
        public List<byte[]> processDataBeforeSend() {
            List<byte[]> list=new ArrayList<byte[]>();
            list.add(DataForSendToPrinterPos80.initializePrinter());
            list.add(PrinterCommands.ESC_ALIGN_CENTER);
            list.add(DataForSendToPrinterPos80.printRasterBmp(
                    0,printBmp, BitmapToByteData.BmpType.Threshold, BitmapToByteData.AlignType.Left,576));
  //                list.add(DataForSendToPrinterPos80.printAndFeedForward(3));
            return list;
        }
    });
  }

  public Handler handler=new Handler(){
    @Override
    public void handleMessage(Message msg) {
        super.handleMessage(msg);
        switch (msg.what){
            case 2:
                printpicCode(b2);
                break;
        }

    }
};

public Bitmap convertGreyImg(Bitmap img) {
  int width = img.getWidth();
  int height = img.getHeight();

  int[] pixels = new int[width * height];

  img.getPixels(pixels, 0, width, 0, 0, width, height);


  //The arithmetic average of a grayscale image; a threshold
  double redSum=0,greenSum=0,blueSun=0;
  double total=width*height;

  for(int i = 0; i < height; i++)  {
      for(int j = 0; j < width; j++) {
          int grey = pixels[width * i + j];

          int red = ((grey  & 0x00FF0000 ) >> 16);
          int green = ((grey & 0x0000FF00) >> 8);
          int blue = (grey & 0x000000FF);



          redSum+=red;
          greenSum+=green;
          blueSun+=blue;


      }
  }
  int m=(int) (redSum/total);

  //Conversion monochrome diagram
  for(int i = 0; i < height; i++)  {
      for(int j = 0; j < width; j++) {
          int grey = pixels[width * i + j];

          int alpha1 = 0xFF << 24;
          int red = ((grey  & 0x00FF0000 ) >> 16);
          int green = ((grey & 0x0000FF00) >> 8);
          int blue = (grey & 0x000000FF);


          if (red>=m) {
              red=green=blue=255;
          }else{
              red=green=blue=0;
          }
          grey = alpha1 | (red << 16) | (green << 8) | blue;
          pixels[width*i+j]=grey;


      }
  }
  Bitmap mBitmap=Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
  mBitmap.setPixels(pixels, 0, width, 0, 0, width, height);



  return mBitmap;
}

  @ReactMethod
  public void pushCutPaper(){
      binder.writeDataByYouself(new UiExecute() {
          @Override
          public void onsucess() {
              Log.v(LOG_TAG, "pushCutPaper onsucess");
          }

          @Override
          public void onfailed() {
              Log.v(LOG_TAG, "pushCutPaper onfailed");
          }
      }, new ProcessData() {
          @Override
          public List<byte[]> processDataBeforeSend() {
              List<byte[]> list=new ArrayList<byte[]>();
              list.add(DataForSendToPrinterPos80.selectCutPagerModerAndCutPager(66,1));
              return list;
          }
      });
  }
}