Androidデバイス接続プリンタ

Androidデバイスはプリンタに接続できる.
また、システムバージョンが高いほど、APIが完備する.
私の設備は4です.xの平板設備
印刷デバイスのコードを検出します.

//       UsbManager             
UsbDevice  usbDevice = null;
UsbManager usbManager = (UsbManager) Application.getInstance().getSystemService(Service.USB_SERVICE);
HashMap deviceMap = usbManager.getDeviceList();
if (deviceMap.isEmpty()) {
    if (BuildConfig.DEBUG) return;
    return;
}
Iterator deviceIterator = deviceMap.keySet().iterator();
while (deviceIterator.hasNext()) {
   /**
    *device.getInterface(0).getInterfaceClass() == 7    
    */
    UsbDevice device = deviceMap.get(deviceIterator.next());
    if (device.getDeviceClass() == 0 && device.getInterface(0).getInterfaceClass() == 7) {
       //                                 vid pid
        usbDevice = device;

       //  usb        Vid   Pid      id     id
       //       vid,pid                        
         if (1155 == device.getVendorId() && 208 == getProductId()) { //        vid,pid
           //            usbDevice 
         } else if (2655 == device.getVendorId() && 1122 == getProductId()) {//         vid,pid
           //            usbDevice
           //          ,            .              ,      ,        
           //            ,      SP  ,             Sp  ,        vid,pid     
           //  ,     ,                      
         }  
    }

//           context  UsbManager
UsbManager usbManager = (UsbManager) Application.getInstance().getSystemService(Service.USB_SERVICE);
if (usbManager.hasPermission(usbDevice)) {
//        
    openDevice();
} else {
    PendingIntent pendingIntent = PendingIntent.getBroadcast(Application.getInstance(), 0, new Intent(
            "     .USB"), 0);
    Application.getInstance().registerReceiver(permissionReceiver,
            new IntentFilter("    .USB"));
    usbManager.requestPermission(usbDevice, pendingIntent);
}
}

//           
public void openDevice() {
    UsbManager usbManager = (UsbManager) Application.getInstance().getSystemService(Service.USB_SERVICE);

    usbDeviceConnection = usbManager.openDevice(usbDevice);
    if (usbDeviceConnection == null) {
        ToastUtil.showShort("       ");
        return;
    }

    if (usbDeviceConnection.claimInterface(usbDevice.getInterface(0), true)) {
        ToastUtil.showShort("       ");
    } else {
        ToastUtil.showShort("       ");
        usbDeviceConnection.close();
        usbDeviceConnection = null;
    }
}

//  UsbDeviceConnection bulkTransfer      

usbDeviceConnection.bulkTransfer();


//    
public void onDestroy() {
    if (usbDeviceConnection != null) {
        usbDeviceConnection.close();
        usbDeviceConnection = null;
    }
    if (usbDevice != null) {
        usbDevice = null;
    }
    if (usbEndOut != null) {
        usbEndOut = null;
    }
}

 

package android.hardware.usb;

public class UsbDeviceConnection {
.........
/**
 * Performs a bulk transaction on the given endpoint.
 * The direction of the transfer is determined by the direction of the endpoint.
 * 

 * This method transfers data starting from index 0 in the buffer.
 * To specify a different offset, use
 * {@link #bulkTransfer(UsbEndpoint, byte[], int, int, int)}.
 * 
 *
 * @param endpoint the endpoint for this transaction
 * @param buffer buffer for data to send or receive
 * @param length the length of the data to send or receive
 * @param timeout in milliseconds
 * @return length of data transferred (or zero) for success,
 * or negative value for failure
 */
public int bulkTransfer(UsbEndpoint endpoint,
        byte[] buffer, int length, int timeout) {
    return bulkTransfer(endpoint, buffer, 0, length, timeout);
}

..........

}