Example Demonstration of PAYable WPOS Printer SDK

MainActivityLite.java

package com.payable.posutils;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import androidx.databinding.DataBindingUtil;

import com.payable.posutils.databinding.ActivityMainBinding;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

public class MainActivityLite extends AppCompatActivity {

    final String PRINT_CALLBACK = "com.package.name.PRINT_CALLBACK";
    ActivityMainBinding binding;

    int count = 0;

    BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {

            int result = intent.getIntExtra("PRINT_RESULT", 0);
            String printId = intent.getStringExtra("PRINT_ID");

            Toast.makeText(context, "PRINT_RESULT: " + result + " PRINT_ID: " + printId, Toast.LENGTH_LONG).show();

            if (result == 0 /*On Success*/) {

                if (count < 5) {
                    count++;
                    printBitmap();
                }
            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        binding = DataBindingUtil.setContentView(this, R.layout.activity_main);

        binding.btnPrint.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                printBitmap();
            }
        });

        registerReceiver(mReceiver, new IntentFilter(PRINT_CALLBACK));

        binding.imageView.setImageBitmap(getBitmap("setImageBitmap", 1000));
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(mReceiver);
    }

    private void printBitmap() {

        Intent intent = new Intent("com.payable.posutils.POS_ACTION");
        intent.putExtra("REQUEST", "PRINT");
        intent.putExtra("PRINT_ID", "some_id");
        intent.putExtra("PRINT_CALLBACK", PRINT_CALLBACK);
        intent.putExtra("PRINT_SPACE", 60);
        intent.putExtra("PRINT_IMAGE", convertBitmapToByteArray(getBitmap("printBitmap", 1000)));

        sendBroadcast(intent);
    }

    private byte[] convertBitmapToByteArray(Bitmap bitmap) {
        ByteArrayOutputStream baos = null;
        try {
            baos = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
            return baos.toByteArray();
        } finally {
            if (baos != null) {
                try {
                    baos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    private Bitmap getBitmap(String name, int height) {

        Bitmap bitmap = Bitmap.createBitmap(400, height, Bitmap.Config.ARGB_8888);
        Bitmap.Config bitmapConfig = bitmap.getConfig();

        if (bitmapConfig == null) {
            bitmapConfig = Bitmap.Config.ARGB_8888;
        }

        bitmap = bitmap.copy(bitmapConfig, true);
        bitmap.eraseColor(Color.WHITE);

        Canvas canvas = new Canvas(bitmap);
        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        paint.setTypeface(Typeface.create(Typeface.DEFAULT, Typeface.BOLD));
        paint.setColor(Color.BLACK);
        paint.setTextSize(30);

        int yposition = 30;
        int space = 40;

        for (int x = 0; yposition < height + space; x++) {
            canvas.drawText(name + "-" + (x + 1), 5, yposition, paint);
            yposition = yposition + space;
        }

        return bitmap;
    }
}