An implementation of an activity for connecting to a Bixolon printer

PrintActivity.java

package ir.eram.printexample;

import android.app.ProgressDialog;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothClass;
import android.bluetooth.BluetoothDevice;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.text.Html;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.actionbarsherlock.app.SherlockActivity;
import com.actionbarsherlock.view.MenuItem;

import org.apache.http.NameValuePair;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import butterknife.Bind;
import butterknife.ButterKnife;
import butterknife.OnClick;
import ir.eram.printexample.Jason.UserFunctions;
import ir.eram.printexample.Session.SessionManager;
import ir.eram.printexample.adapter.LoginTBL;
import ir.eram.printexample.adapter.PrintTBL;
import ir.eram.printexample.database.DatabaseHandler;
import jpos.JposException;
import jpos.POSPrinter;
import jpos.POSPrinterConst;

public class PrintActivity extends SherlockActivity {
    public final int THEME = R.style.Theme_Sherlock_Light;
    private String ICode;
    private String username;
    private String password;
    private ProgressDialog pd;

    private static final String CONFIG_FILE_NAME = "jpos.xml";

    @Bind(R.id.txtStatus)
    TextView txtStatus;
    @Bind(R.id.btnDownload)
    Button btnDownload;
    @Bind(R.id.btnPrint)
    Button btnPrint;

    String localUrl;

    private LoginTBL tblL;
    private DatabaseHandler dbhandler;
    private SessionManager session;
    private int userId;
    private POSPrinter posPrinter;
    private BluetoothDevice device;
    private boolean openedPrinter;
    private int requestId;


    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setTheme(THEME);
        // setTitle(getString(R.string.page_title_coll_detail));
        setTitle(Html.fromHtml("<font color='#ffffff'>"
                + "چاپ بارنامه" + "</font>"));
        getSherlock().getActionBar().setIcon(R.drawable.ic_launcher);

        setContentView(R.layout.activity_print);
        ButterKnife.bind(this);

        getSupportActionBar().setDisplayShowTitleEnabled(true);
        getSupportActionBar().setDisplayUseLogoEnabled(false);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        getSupportActionBar().setBackgroundDrawable(
                new ColorDrawable(Color.parseColor("#055bbb")));
        findBluetoothDevice();
        initUI();
        initPrinter();
    }

    private void initPrinter() {
        if (posPrinter == null) {
            posPrinter = new POSPrinter(this);


            try {
                openFileInput(CONFIG_FILE_NAME);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
                Toast.makeText(this, e.getMessage(), Toast.LENGTH_SHORT).show();
                createNewConfigFile();
            }
        }
    }

    @OnClick(R.id.btnDownload)
    public void onDownload() {
        List<NameValuePair> param = new ArrayList<>();
        DownloadPDFAsync downloadPDFAsync = new DownloadPDFAsync();
        downloadPDFAsync.execute(param);
    }

    private void findBluetoothDevice() {
        BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        Set<BluetoothDevice> pairedDevice = bluetoothAdapter.getBondedDevices();
        for (BluetoothDevice device : pairedDevice)
        {
            String deviceBTMajorClass = getBTMajorDeviceClass(device.getBluetoothClass().getMajorDeviceClass());
            if (deviceBTMajorClass.equals("IMAGING")) {
                this.device = device;
                break;
            }
        }
    }

    @OnClick(R.id.btnPrint)
    public void doPrint() {
        try {
            if (!openedPrinter) {
                posPrinter.open(device.getName());
                posPrinter.claim(0);
                posPrinter.setDeviceEnabled(true);
                posPrinter.setAsyncMode(true);
                openedPrinter = true;
            }
        } catch (JposException e) {
            e.printStackTrace();
            try {
                posPrinter.close();
                openedPrinter = false;
            } catch (JposException e1) {
                e1.printStackTrace();
            }

            Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
        }


        printPDF(localUrl);


    }

    @OnClick(R.id.btnFindPrinter)
    public void onSetPrinter() {
        findBluetoothDevice();
        createNewConfigFile();
        try {
            try {
                posPrinter.close();
            } catch (Exception ignored) {

            }
            posPrinter.open(device.getName());
            posPrinter.claim(0);
            posPrinter.setDeviceEnabled(true);
            posPrinter.setAsyncMode(true);
            openedPrinter = true;
            Toast.makeText(this, "تنظیم با موفقیت انجام گردید.", Toast.LENGTH_LONG).show();
        } catch (JposException e) {
            e.printStackTrace();
            Toast.makeText(this, "تنظیم با مشکلی روبرو گردید لطفا یک بار خارج شوید و دوباره امتحان کنید . ویا دیتا اپلیکیشن را پاک کنید." + e.getMessage(), Toast.LENGTH_LONG).show();
        }

    }

    private void createNewConfigFile() {

        try {
            String content = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
                    "<!DOCTYPE JposEntries PUBLIC \"-//JavaPOS//DTD//EN\"\n" +
                    "    \"jpos/res/jcl.dtd\">\n" +
                    "<JposEntries>\n" +
                    "    <JposEntry logicalName=\"" + device.getName() + "\" >\n" +
                    "        <creation\n" +
                    "            factoryClass=\"com.bxl.loader.ServiceInstanceFactory\"\n" +
                    "            serviceClass=\"com.bxl.services.posprinter.POSPrinterService\" />\n" +
                    "\n" +
                    "        <vendor\n" +
                    "            name=\"BIXOLON\"\n" +
                    "            url=\"http://www.bixolon.com\" />\n" +
                    "\n" +
                    "        <jpos\n" +
                    "            category=\"POSPrinter\"\n" +
                    "            version=\"1.14\" />\n" +
                    "\n" +
                    "        <product\n" +
                    "            name=\"" + device.getName() + "\"\n" +
                    "            description=\"First Real Waterproof 3 inch Thermal POS Printer\"\n" +
                    "            url=\"http://www.bixolon.com\" />\n" +
                    "\n" +
                    "        <!-- Other non JavaPOS required property (mostly vendor properties and bus specific properties i.e. RS232 ) -->\n" +
                    "        <prop\n" +
                    "            name=\"deviceBus\"\n" +
                    "            type=\"String\"\n" +
                    "            value=\"Bluetooth\" />\n" +
                    "        <prop\n" +
                    "            name=\"address\"\n" +
                    "            type=\"String\"\n" +
                    "            value=\"" + device.getAddress() + "\" />\n" +
                    "\n" +
                    "    </JposEntry>\n" +
                    "\n" +
                    "</JposEntries>\n";

            FileOutputStream fos = null;
            try {

                fos = new FileOutputStream(getFilesDir() + "/" + "jpos.xml");

            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }


            try {
            
                fos.write(content.getBytes());
                openFileInput(CONFIG_FILE_NAME);

            } catch (IOException e) {
                e.printStackTrace();
                Toast.makeText(this, e.getMessage(), Toast.LENGTH_SHORT).show();
            } finally {


                if (fos != null) {
                    try {
                        fos.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        }catch (Exception e){
            e.printStackTrace();
            Toast.makeText(this,e.getMessage(),Toast.LENGTH_LONG).show();
        }
    }

    private void printPDF(String fileName) {
        try {

            int width = 1000;
            int page = 1;
            int brightness = 88;

            int alignment = POSPrinterConst.PTR_PDF_CENTER;
            posPrinter.printPDF(POSPrinterConst.PTR_S_RECEIPT, fileName, width,
                    alignment, page, brightness);

        } catch (JposException | NumberFormatException e) {
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), e.getMessage(),
                    Toast.LENGTH_SHORT).show();
        }
    }


    @Override
    protected void onDestroy() {
        super.onDestroy();
        try {
            posPrinter.close();
            openedPrinter = true;
        } catch (JposException e) {
            e.printStackTrace();
        }
    }

    private String getBTMajorDeviceClass(int major) {
        switch (major) {
            case BluetoothClass.Device.Major.AUDIO_VIDEO:
                return "AUDIO_VIDEO";
            case BluetoothClass.Device.Major.COMPUTER:
                return "COMPUTER";
            case BluetoothClass.Device.Major.HEALTH:
                return "HEALTH";
            case BluetoothClass.Device.Major.IMAGING:
                return "IMAGING";
            case BluetoothClass.Device.Major.MISC:
                return "MISC";
            case BluetoothClass.Device.Major.NETWORKING:
                return "NETWORKING";
            case BluetoothClass.Device.Major.PERIPHERAL:
                return "PERIPHERAL";
            case BluetoothClass.Device.Major.PHONE:
                return "PHONE";
            case BluetoothClass.Device.Major.TOY:
                return "TOY";
            case BluetoothClass.Device.Major.UNCATEGORIZED:
                return "UNCATEGORIZED";
            case BluetoothClass.Device.Major.WEARABLE:
                return "AUDIO_VIDEO";
            default:
                return "unknown!";
        }
    }

    private void getUserPass() {
        tblL = dbhandler.getUserPass(session.getIcode());
    }

    private void initUI() {
        dbhandler = new DatabaseHandler(this);
        session = new SessionManager(this);
        tblL = new LoginTBL();
        getUserPass();
        userId = tblL.get_id();

        Bundle bundle = getIntent().getExtras();
        username = bundle.getString("username");
        password = bundle.getString("password");
        ICode = bundle.getString("icode");
        requestId = bundle.getInt("requestId");

        List<NameValuePair> param = new ArrayList<>();
        DownloadPDFAsync downloadPDFAsync = new DownloadPDFAsync();
        downloadPDFAsync.execute(param);
    }


    class DownloadPDFAsync extends AsyncTask<List<NameValuePair>, Integer, String> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pd = new ProgressDialog(PrintActivity.this);
            pd.setMessage(getString(R.string.wait));
            pd.setCancelable(false);
            pd.show();
        }

        @SafeVarargs
        @Override
        protected final String doInBackground(List<NameValuePair>... params) {
            localUrl = Environment.getExternalStorageDirectory().getPath() + "/printexample/" + ICode + "_print.pdf";
            if (new File(localUrl).exists()) {
                return null;
            }

            InputStream input = null;
            OutputStream output = null;
            HttpURLConnection connection = null;
            try {
                URL url = new URL(UserFunctions.PrintURL + "?username=" + username + "&password=" + password + "&Icode=" + ICode);
                connection = (HttpURLConnection) url.openConnection();
                Log.i("urldownload", url.getPath());
                connection.connect();

                if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
                    return "Server returned HTTP " + connection.getResponseCode()
                            + " " + connection.getResponseMessage();
                }


                int fileLength = connection.getContentLength();

                input = connection.getInputStream();
                File directory = new File(Environment.getExternalStorageDirectory().getPath() + "/printexample/");
                if (!directory.exists())
                    directory.mkdirs();

                output = new FileOutputStream(localUrl);

                byte data[] = new byte[4096];
                long total = 0;
                int count;
                while ((count = input.read(data)) != -1) {
                    if (isCancelled()) {
                        input.close();
                        return null;
                    }
                    total += count;
                    if (fileLength > 0) // only if total length is known
                        publishProgress((int) (total * 100 / fileLength));
                    output.write(data, 0, count);
                }

                PrintTBL printTBL = new PrintTBL();
                printTBL.userId = userId;
                printTBL.urlLocal = localUrl;
                printTBL.url = url.getPath();
                printTBL.barnameNumber = Integer.parseInt(ICode);
                printTBL.requestId = requestId;
                printTBL.save(PrintActivity.this);


            } catch (Exception e) {
                e.printStackTrace();
                return e.toString();
            } finally {
                try {
                    if (output != null)
                        output.close();
                    if (input != null)
                        input.close();
                } catch (IOException ignored) {
                }

                if (connection != null)
                    connection.disconnect();
            }
            return null;
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            pd.dismiss();
            if (new File(localUrl).exists()) {
                btnDownload.setVisibility(View.GONE);
                btnPrint.setVisibility(View.VISIBLE);
            } else {
                btnDownload.setVisibility(View.VISIBLE);
                btnPrint.setVisibility(View.GONE);
            }

        }


    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                onBackPressed();
                return true;
        }
        return super.onOptionsItemSelected(item);
    }
}