Print Pdf file via Bluetooth Printer Android

Question

In My project Need to print Pdf file Via Bluetooth Printer. I write a code to print via pdf Its for fine for a Text,

But I want to Print PDF file on Bluetooth printer.

My java Code to Print Text

    @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         lv= (ListView) findViewById(R.id.listView1);      //   listdata(lv);         try {          // we are goin to have three buttons for specific functions         Button openButton = (Button) findViewById(R.id.open);         Button sendButton = (Button) findViewById(R.id.send);         Button closeButton = (Button) findViewById(R.id.close);         Button btnco= (Button) findViewById(R.id.btnconnect);          btnco.setOnClickListener(new OnClickListener() {              @Override             public void onClick(View v) {                 // TODO Auto-generated method stub                 try {                     findBT();                     openBT();                 } catch (Exception ex) {                 }             }         });         myLabel = (TextView) findViewById(R.id.label);         myTextbox = (EditText) findViewById(R.id.entry);          // open bluetooth connection         openButton.setOnClickListener(new View.OnClickListener() {             public void onClick(View v) {                 startActivity(new Intent(MainActivity.this,NewAct.class));             }         });          // send data typed by the user to be printed         sendButton.setOnClickListener(new View.OnClickListener() {             public void onClick(View v) {                 try {                     sendData();                 } catch (IOException ex) {                 }             }         });          // close bluetooth connection         closeButton.setOnClickListener(new View.OnClickListener() {             public void onClick(View v) {                 try {                     closeBT();                 } catch (IOException ex) {                 }             }         });      } catch (NullPointerException e) {         e.printStackTrace();     } catch (Exception e) {         e.printStackTrace();     } }  /*  * This will find a bluetooth printer device  */ void findBT() {      try {          mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();           if (mBluetoothAdapter == null) {             myLabel.setText("No bluetooth adapter available");             Toast.makeText(MainActivity.this, "No bluetooth  available", Toast.LENGTH_LONG).show();          // startActivity(new Intent(MainActivity.this,NewAct.class));         }          if (!mBluetoothAdapter.isEnabled()) {             Intent enableBluetooth = new Intent(                     BluetoothAdapter.ACTION_REQUEST_ENABLE);             startActivityForResult(enableBluetooth, 0);             Toast.makeText(this, "OPen", Toast.LENGTH_LONG).show();              //startActivity(new Intent(MainActivity.this,NewAct.class));         }           Set<BluetoothDevice> pairedDevices = mBluetoothAdapter                 .getBondedDevices();          if (pairedDevices.size() > 0) {               for (BluetoothDevice device : pairedDevices) {                  // MP300 is the name of the bluetooth printer device                  if (device.getName().equals(NewAct.printer)) {                     //openBT();                     mmDevice = device;                     break;                 }                 else {                  }             }         }         {         myLabel.setText("Bluetooth Device Found");         try {             // Standard SerialPortService ID             UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");             mmSocket = mmDevice.createRfcommSocketToServiceRecord(uuid);             mmSocket.connect();             mmOutputStream = mmSocket.getOutputStream();             mmInputStream = mmSocket.getInputStream();              beginListenForData();              myLabel.setText("Bluetooth Opened");         } catch (NullPointerException e) {             e.printStackTrace();         }          }     } catch (NullPointerException e) {         e.printStackTrace();     } catch (Exception e) {         e.printStackTrace();     } }  /*  * Tries to open a connection to the bluetooth printer device  */ void openBT() throws IOException {     try {         // Standard SerialPortService ID         UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");         mmSocket = mmDevice.createRfcommSocketToServiceRecord(uuid);         mmSocket.connect();         mmOutputStream = mmSocket.getOutputStream();         mmInputStream = mmSocket.getInputStream();          beginListenForData();          myLabel.setText("Bluetooth Opened");     } catch (NullPointerException e) {         e.printStackTrace();     } catch (Exception e) {         e.printStackTrace();     } }  /*  * After opening a connection to bluetooth printer device,   * we have to listen and check if a data were sent to be printed.  */ void beginListenForData() {     try {         final Handler handler = new Handler();          // This is the ASCII code for a newline character         final byte delimiter = 10;          stopWorker = false;         readBufferPosition = 0;         readBuffer = new byte[1024];          workerThread = new Thread(new Runnable() {             public void run() {                 while (!Thread.currentThread().isInterrupted()                         && !stopWorker) {                      try {                          int bytesAvailable = mmInputStream.available();                         if (bytesAvailable > 0) {                             byte[] packetBytes = new byte[bytesAvailable];                             mmInputStream.read(packetBytes);                             for (int i = 0; i < bytesAvailable; i++) {                                 byte b = packetBytes[i];                                 if (b == delimiter) {                                     byte[] encodedBytes = new byte[readBufferPosition];                                     System.arraycopy(readBuffer, 0,                                             encodedBytes, 0,                                             encodedBytes.length);                                     final String data = new String(                                             encodedBytes, "US-ASCII");                                     readBufferPosition = 0;                                      handler.post(new Runnable() {                                         public void run() {                                             myLabel.setText(data);                                         }                                     });                                 } else {                                     readBuffer[readBufferPosition++] = b;                                 }                             }                         }                      } catch (IOException ex) {                         stopWorker = true;                     }                  }             }         });          workerThread.start();     } catch (NullPointerException e) {         e.printStackTrace();     } catch (Exception e) {         e.printStackTrace();     } }  /*  * This will send data to be printed by the bluetooth printer  */ void sendData() throws IOException {     try {          // the text typed by the user         String msg = myTextbox.getText().toString();         msg += "\n";          mmOutputStream.write(msg.getBytes());          // tell the user data were sent         myLabel.setText("Data Sent");      } catch (NullPointerException e) {         e.printStackTrace();     } catch (Exception e) {         e.printStackTrace();     } }  /*  * Close the connection to bluetooth printer.  */ void closeBT() throws IOException {     try {         stopWorker = true;         mmOutputStream.close();         mmInputStream.close();         mmSocket.close();         myLabel.setText("Bluetooth Closed");     } catch (NullPointerException e) {         e.printStackTrace();     } catch (Exception e) {         e.printStackTrace();     } }   public void listdata(ListView lv){      try{       pairedDevices = mBluetoothAdapter.getBondedDevices();        ArrayList<String> list = new ArrayList<String>();       for(BluetoothDevice bt : pairedDevices)          list.add(bt.getName());        Toast.makeText(getApplicationContext(),"Showing Paired Devices",       Toast.LENGTH_SHORT).show();       @SuppressWarnings("unchecked")     final ArrayAdapter<String> adapter = new ArrayAdapter<String>       (this,android.R.layout.simple_list_item_1, list);       lv.setAdapter(adapter);      }catch(Exception e)      {          Toast.makeText(this, "error"+e, Toast.LENGTH_LONG).show();      }     } 

I don't have Idea How to Pass Pdf file for print to Bluetooth Printer

Please Help Me How i can do this

Thanks In Advance.

Answer 1

You could try getting bytes from a pdf file & send them to printer as follows:

/*  * This will send data to be printed by the bluetooth printer */ void sendData() throws IOException { try {      // the text typed by the user     //String msg = myTextbox.getText().toString();     //msg += "\n";  InputStream is = this.openFileInput("filename.pdf"); // Where this is Activity ByteArrayOutputStream bos = new ByteArrayOutputStream(); byte[] b = new byte[1024]; while ((int bytesRead = is.read(b)) != -1) {    bos.write(b, 0, bytesRead); } byte[] bytes = bos.toByteArray();      byte[] printformat = { 27, 33, 0 }; //try adding this print format      mmOutputStream.write(printformat);      mmOutputStream.write(bytes);      // tell the user data were sent     myLabel.setText("Data Sent");      closeBT(); } catch (NullPointerException e) {     e.printStackTrace(); } catch (Exception e) {     e.printStackTrace(); } } 

You will need to add following permissions in your Android Manifest:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 

Answer 2

Any application print a pdf has some library to decode pdf.

Of course you can send only a text to your printer.

If you want to print directly pdf you need your own library to do that.

For android i always use mupdf, very powerfuf lib and open source.

look at stackoverflow how to install step-by-step Integrate MuPDF Reader in an app

after you done run a full demo project from https://github.com/derek-watson/mupdf

list on directory (mupdf/platform/android/)

It will run main activity ChoosePDFActivity.java after you picked up pdf from your device it will showing, then main top bar have print button (PrintDialogActivity.java to print on google cloud print) change code here to send stream to your printer

Hope this help!!!