├── AndroidManifest.xml
├── README.md
├── com
    └── pradeep
    │   ├── adapter
    │       └── USBAdapter.java
    │   ├── printer
    │       └── PrintOrder.java
    │   └── usbprinter
    │       └── MainActivity.java
└── res
    └── xml
        └── device_filter.xml


/AndroidManifest.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     package="com.tastykhana.usbprinter"
 4 |     android:versionCode="1"
 5 |     android:versionName="1.0" >
 6 | 
 7 |     <uses-sdk
 8 |         android:minSdkVersion="8"
 9 |         android:targetSdkVersion="18" />
10 |     <supports-screens android:anyDensity="true" />
11 |     <uses-permission android:name="android.permission.WAKE_LOCK" />
12 | 	<uses-permission android:name="android.permission.INTERNET"/>
13 |     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
14 |     <uses-feature android:name="android.hardware.usb.host"/>
15 |     <application
16 |         android:allowBackup="true"
17 |         android:icon="@drawable/app_icon"
18 |         android:label="@string/app_name" >
19 |         <activity
20 |             android:name="com.tastykhana.usbprinter.MainActivity"
21 |             android:label="@string/app_name" >
22 |             <intent-filter>
23 |                 <action android:name="android.intent.action.MAIN" />
24 |                 <category android:name="android.intent.category.LAUNCHER" />
25 |                 <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
26 |                 <action android:name="android.hardware.usb.action.USB_DEVICE_DETACHED" />
27 |                 <meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="@xml/device_filter"/>
28 |             </intent-filter>
29 |         </activity>
30 |     </application>
31 | 
32 | </manifest>
33 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | Android-USB-printer
2 | ===================
3 | 
4 | This app can connect and print messages to any USB printer via android.
5 | 


--------------------------------------------------------------------------------
/com/pradeep/adapter/USBAdapter.java:
--------------------------------------------------------------------------------
  1 | package com.pradeep.adapter;
  2 | 
  3 | import android.annotation.SuppressLint;
  4 | import android.app.Activity;
  5 | import android.app.PendingIntent;
  6 | import android.content.BroadcastReceiver;
  7 | import android.content.Context;
  8 | import android.content.Intent;
  9 | import android.content.IntentFilter;
 10 | import android.database.sqlite.SQLiteDatabase;
 11 | import android.hardware.usb.UsbConstants;
 12 | import android.hardware.usb.UsbDevice;
 13 | import android.hardware.usb.UsbDeviceConnection;
 14 | import android.hardware.usb.UsbEndpoint;
 15 | import android.hardware.usb.UsbInterface;
 16 | import android.hardware.usb.UsbManager;
 17 | import android.os.Bundle;
 18 | import android.util.Log;
 19 | import android.widget.Toast;
 20 | 
 21 | public class USBAdapter{
 22 | 	private UsbManager mUsbManager;
 23 | 	private UsbDevice mDevice;
 24 | 	private PendingIntent mPermissionIntent;
 25 | 	UsbDeviceConnection connection;
 26 | 	String TAG = "USB";
 27 | 	
 28 | 	public USBAdapter(){
 29 | 		
 30 | 	}
 31 | 	
 32 |     public void createConn(Context context) {
 33 | 		mUsbManager = (UsbManager) context.getSystemService(Context.USB_SERVICE);
 34 | 		final String ACTION_USB_PERMISSION = "com.pradeep.usbprinter.USB_PERMISSION";
 35 | 		mPermissionIntent = PendingIntent.getBroadcast(context, 0, new Intent(ACTION_USB_PERMISSION), 0);
 36 | 		IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);
 37 | 		context.registerReceiver(mUsbReceiver, filter);
 38 |     }
 39 | 	
 40 | 	private static final String ACTION_USB_PERMISSION =
 41 | 		    "com.pradeep.usbprinter.USB_PERMISSION";
 42 | 		private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
 43 | 
 44 | 		    public void onReceive(Context context, Intent intent) {
 45 | 		        String action = intent.getAction();
 46 | 		        if (ACTION_USB_PERMISSION.equals(action)) {
 47 | 		            synchronized (this) {
 48 | 		                mDevice = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
 49 | 
 50 | 		                if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
 51 | 		                    if(mDevice != null){
 52 | 		                      //call method to set up device communication
 53 | 		                   }
 54 | 		                } 
 55 | 		                else {
 56 | 		                    Log.d(TAG, "permission denied for device " + mDevice);
 57 | 		                }
 58 | 		            }
 59 | 		        }
 60 | 		    }
 61 | 		};
 62 | 	
 63 | 	@SuppressLint("NewApi")
 64 | 	public void printMessage(Context context,String msg) {
 65 | 		// TODO Auto-generated method stub
 66 | 		final String printdata = msg;
 67 | 		final UsbEndpoint mEndpointBulkOut;
 68 | 		if (mUsbManager.hasPermission(mDevice)){
 69 | 			UsbInterface intf = mDevice.getInterface(0);
 70 | 			for (int i = 0; i < intf.getEndpointCount(); i++) {
 71 | 				   UsbEndpoint ep = intf.getEndpoint(i);
 72 | 				 if (ep.getType() == UsbConstants.USB_ENDPOINT_XFER_BULK) {
 73 | 					   if (ep.getDirection() == UsbConstants.USB_DIR_OUT) {
 74 | 				           mEndpointBulkOut = ep;
 75 | 				               connection = mUsbManager.openDevice(mDevice);
 76 | 				           if(connection!=null)
 77 | 				           {
 78 | 				             Log.e("Connection:"," connected");
 79 | 				             Toast.makeText(context, "Device connected", Toast.LENGTH_SHORT).show();
 80 | 				           }
 81 | 				           boolean forceClaim = true;
 82 | 				           connection.claimInterface(intf, forceClaim );
 83 | 				           Integer res = connection.bulkTransfer(mEndpointBulkOut, printdata.getBytes(), printdata.getBytes().length, 10000);
 84 | 				           new Thread(new Runnable() 
 85 | 				           { 
 86 | 					           @Override 
 87 | 					           public void run() 
 88 | 					           { 
 89 | 					               // TODO Auto-generated method stub 
 90 | 					               Log.i("Thread:", "in run thread"); 
 91 | 					               byte[] bytes = printdata.getBytes();
 92 | 					               int b = connection.bulkTransfer(mEndpointBulkOut, bytes, bytes.length, 100000); 
 93 | 					               Log.i("Return Status", "b-->" + b); 
 94 | 				               } 
 95 | 				            }).start(); 
 96 | 
 97 | 				               connection.releaseInterface(intf);
 98 | 				           break;
 99 | 				       }
100 | 				}
101 | 			}
102 | 		}else{
103 | 			mUsbManager.requestPermission(mDevice, mPermissionIntent);
104 | 			Toast.makeText(context, "Device have no permission", Toast.LENGTH_SHORT).show();
105 | 		}
106 | 	}
107 | 	@SuppressLint("NewApi")
108 | 	public void closeConnection(Context context){
109 | 		BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
110 | 		    public void onReceive(Context context, Intent intent) {
111 | 		        String action = intent.getAction(); 
112 | 
113 | 		      if (UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action)) {
114 | 		            UsbDevice device = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
115 | 		            if (device != null) {
116 | 		            	Toast.makeText(context, "Device closed", Toast.LENGTH_SHORT).show();
117 | 		            	connection.close();
118 | 		            }
119 | 		        }
120 | 		    }
121 | 		};
122 | 	}
123 | }
124 | 


--------------------------------------------------------------------------------
/com/pradeep/printer/PrintOrder.java:
--------------------------------------------------------------------------------
 1 | package com.pradeep.printer;
 2 | 
 3 | import java.io.IOException;
 4 | import android.content.Context;
 5 | import com.pradeep.adapter.USBAdapter;
 6 | 
 7 | public class PrintOrder {
 8 | 	
 9 | 	public PrintOrder(){
10 | 		
11 | 	}
12 | 	
13 | 	public void Print(Context context,String msg){
14 | 		USBAdapter usba = new USBAdapter();
15 | 			usba.createConn(context);
16 | 		try {
17 | 			usba.printMessage(context,msg);
18 | 			usba.closeConnection(context);
19 | 		} catch (Exception e) {
20 | 			// TODO Auto-generated catch block
21 | 			e.printStackTrace();
22 | 		}
23 | 	}
24 | }
25 | 


--------------------------------------------------------------------------------
/com/pradeep/usbprinter/MainActivity.java:
--------------------------------------------------------------------------------
 1 | package com.pradeep.usbprinter;
 2 | 
 3 | import com.pradeep.printer.PrintOrder;
 4 | 
 5 | import android.app.ActionBar;
 6 | import android.app.Activity;
 7 | import android.app.AlertDialog;
 8 | import android.content.Context;
 9 | import android.os.Bundle;
10 | import android.util.Log;
11 | import android.widget.Toast;
12 | 
13 | public class PrintMessage extends Activity{
14 | 	
15 | 	protected void onCreate(Bundle icicle) {
16 | 		 super.onCreate(icicle);
17 | 	     setContentView(R.layout.main);
18 | 	     String msg = "This is a test message";
19 | 	     PrintOrder printer = new PrintOrder();
20 | 	     printer.Print(this,msg);
21 | 	}
22 | }
23 | 


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/res/xml/device_filter.xml:
--------------------------------------------------------------------------------
1 | <resources>
2 |      <usb-device vendor-id="65535" product-id="7176" />
3 | </resources>
4 | 


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