kopia lustrzana https://github.com/felHR85/UsbSerial
284 wiersze
8.9 KiB
Java
284 wiersze
8.9 KiB
Java
package com.felhr.serialportexample;
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import java.io.UnsupportedEncodingException;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.concurrent.atomic.AtomicBoolean;
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import com.felhr.usbserial.CDCSerialDevice;
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import com.felhr.usbserial.UsbSerialDevice;
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import com.felhr.usbserial.UsbSerialInterface;
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import android.app.PendingIntent;
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import android.app.Service;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.hardware.usb.UsbDevice;
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import android.hardware.usb.UsbDeviceConnection;
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import android.hardware.usb.UsbManager;
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import android.os.Binder;
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import android.os.Handler;
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import android.os.IBinder;
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import android.util.Log;
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public class UsbService extends Service
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{
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public static final String ACTION_USB_READY = "com.felhr.connectivityservices.USB_READY";
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private static final String ACTION_USB_PERMISSION = "com.android.example.USB_PERMISSION";
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public static final String ACTION_USB_ATTACHED = "android.hardware.usb.action.USB_DEVICE_ATTACHED";
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public static final String ACTION_USB_DETACHED = "android.hardware.usb.action.USB_DEVICE_DETACHED";
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public static final String ACTION_USB_NOT_SUPPORTED = "com.felhr.usbservice.USB_NOT_SUPPORTED";
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public static final String ACTION_NO_USB = "com.felhr.usbservice.NO_USB";
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public static final String ACTION_USB_PERMISSION_GRANTED = "com.felhr.usbservice.USB_PERMISSION_GRANTED";
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public static final String ACTION_USB_PERMISSION_NOT_GRANTED = "com.felhr.usbservice.USB_PERMISSION_NOT_GRANTED";
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public static final String ACTION_USB_DISCONNECTED = "com.felhr.usbservice.USB_DISCONNECTED";
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public static final String ACTION_CDC_DRIVER_NOT_WORKING ="com.felhr.connectivityservices.ACTION_CDC_DRIVER_NOT_WORKING";
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public static final String ACTION_USB_DEVICE_NOT_WORKING = "com.felhr.connectivityservices.ACTION_USB_DEVICE_NOT_WORKING";
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private static final int BAUD_RATE = 9600; // BaudRate. Change this value if you need
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public static final int MESSAGE_FROM_SERIAL_PORT = 0;
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public static boolean SERVICE_CONNECTED = false;
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private IBinder binder = new UsbBinder();
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private Context context;
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private Handler mHandler;
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private UsbManager usbManager;
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private UsbDevice device;
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private UsbDeviceConnection connection;
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private UsbSerialDevice serialPort;
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private boolean serialPortConnected;
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/*
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* onCreate will be executed when service is started. It configures an IntentFilter to listen for
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* incoming Intents (USB ATTACHED, USB DETACHED...) and it tries to open a serial port.
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*/
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@Override
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public void onCreate()
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{
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this.context = this;
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serialPortConnected = false;
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UsbService.SERVICE_CONNECTED = true;
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setFilter();
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usbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
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findSerialPortDevice();
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}
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/* MUST READ about services
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* http://developer.android.com/guide/components/services.html
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* http://developer.android.com/guide/components/bound-services.html
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*/
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@Override
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public IBinder onBind(Intent intent)
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{
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return binder;
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}
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@Override
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public int onStartCommand(Intent intent, int flags, int startId)
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{
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return Service.START_NOT_STICKY;
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}
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@Override
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public void onDestroy()
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{
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super.onDestroy();
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UsbService.SERVICE_CONNECTED = false;
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}
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/*
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* This function will be called from MainActivity to write data through Serial Port
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*/
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public void write(byte[] data)
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{
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if(serialPort != null)
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serialPort.write(data);
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}
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public void setHandler(Handler mHandler)
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{
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this.mHandler = mHandler;
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}
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private void findSerialPortDevice()
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{
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// This snippet will try to open the first encountered usb device connected, excluding usb root hubs
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HashMap<String, UsbDevice> usbDevices = usbManager.getDeviceList();
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if(!usbDevices.isEmpty())
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{
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boolean keep = true;
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for(Map.Entry<String, UsbDevice> entry : usbDevices.entrySet())
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{
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device = entry.getValue();
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int deviceVID = device.getVendorId();
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int devicePID = device.getProductId();
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if(deviceVID != 0x1d6b && (devicePID != 0x0001 || devicePID != 0x0002 || devicePID != 0x0003))
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{
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// There is a device connected to our Android device. Try to open it as a Serial Port.
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requestUserPermission();
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keep = false;
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}else
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{
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connection = null;
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device = null;
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}
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if(!keep)
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break;
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}
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if(!keep)
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{
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// There is no USB devices connected (but usb host were listed). Send an intent to MainActivity.
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Intent intent = new Intent(ACTION_NO_USB);
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sendBroadcast(intent);
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}
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}else
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{
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// There is no USB devices connected. Send an intent to MainActivity
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Intent intent = new Intent(ACTION_NO_USB);
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sendBroadcast(intent);
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}
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}
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private void setFilter()
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{
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IntentFilter filter = new IntentFilter();
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filter.addAction(ACTION_USB_PERMISSION);
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filter.addAction(ACTION_USB_DETACHED);
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filter.addAction(ACTION_USB_ATTACHED);
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registerReceiver(usbReceiver , filter);
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}
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/*
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* Request user permission. The response will be received in the BroadcastReceiver
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*/
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private void requestUserPermission()
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{
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PendingIntent mPendingIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION),0);
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usbManager.requestPermission(device, mPendingIntent);
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}
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/*
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* Data received from serial port will be received here. Just populate onReceivedData with your code
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* In this particular example. byte stream is converted to String and send to UI thread to
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* be treated there.
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*/
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private UsbSerialInterface.UsbReadCallback mCallback = new UsbSerialInterface.UsbReadCallback()
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{
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@Override
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public void onReceivedData(byte[] arg0)
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{
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try
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{
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String data = new String(arg0, "UTF-8");
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if(mHandler != null)
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mHandler.obtainMessage(MESSAGE_FROM_SERIAL_PORT,data).sendToTarget();
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} catch (UnsupportedEncodingException e)
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{
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e.printStackTrace();
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}
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}
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};
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public class UsbBinder extends Binder
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{
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public UsbService getService()
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{
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return UsbService.this;
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}
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}
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/*
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* Different notifications from OS will be received here (USB attached, detached, permission responses...)
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* About BroadcastReceiver: http://developer.android.com/reference/android/content/BroadcastReceiver.html
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*/
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private final BroadcastReceiver usbReceiver = new BroadcastReceiver()
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{
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@Override
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public void onReceive(Context arg0, Intent arg1)
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{
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if(arg1.getAction().equals(ACTION_USB_PERMISSION))
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{
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boolean granted = arg1.getExtras().getBoolean(UsbManager.EXTRA_PERMISSION_GRANTED);
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if(granted) // User accepted our USB connection. Try to open the device as a serial port
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{
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Intent intent = new Intent(ACTION_USB_PERMISSION_GRANTED);
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arg0.sendBroadcast(intent);
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connection = usbManager.openDevice(device);
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serialPortConnected = true;
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new ConnectionThread().run();
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}else // User not accepted our USB connection. Send an Intent to the Main Activity
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{
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Intent intent = new Intent(ACTION_USB_PERMISSION_NOT_GRANTED);
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arg0.sendBroadcast(intent);
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}
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}else if(arg1.getAction().equals(ACTION_USB_ATTACHED))
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{
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if(!serialPortConnected)
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findSerialPortDevice(); // A USB device has been attached. Try to open it as a Serial port
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}else if(arg1.getAction().equals(ACTION_USB_DETACHED))
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{
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// Usb device was disconnected. send an intent to the Main Activity
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Intent intent = new Intent(ACTION_USB_DISCONNECTED);
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arg0.sendBroadcast(intent);
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serialPortConnected = false;
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serialPort.close();
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}
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}
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};
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/*
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* A simple thread to open a serial port.
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* Although it should be a fast operation. moving usb operations away from UI thread is a good thing.
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*/
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private class ConnectionThread extends Thread
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{
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@Override
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public void run()
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{
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serialPort = UsbSerialDevice.createUsbSerialDevice(device, connection);
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if(serialPort != null)
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{
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if(serialPort.open())
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{
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serialPort.setBaudRate(BAUD_RATE);
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serialPort.setDataBits(UsbSerialInterface.DATA_BITS_8);
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serialPort.setStopBits(UsbSerialInterface.STOP_BITS_1);
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serialPort.setParity(UsbSerialInterface.PARITY_NONE);
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serialPort.setFlowControl(UsbSerialInterface.FLOW_CONTROL_OFF);
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serialPort.read(mCallback);
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// Everything went as expected. Send an intent to MainActivity
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Intent intent = new Intent(ACTION_USB_READY);
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context.sendBroadcast(intent);
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}else
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{
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// Serial port could not be opened, maybe an I/O error or if CDC driver was chosen, it does not really fit
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// Send an Intent to Main Activity
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if(serialPort instanceof CDCSerialDevice)
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{
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Intent intent = new Intent(ACTION_CDC_DRIVER_NOT_WORKING);
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context.sendBroadcast(intent);
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}else
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{
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Intent intent = new Intent(ACTION_USB_DEVICE_NOT_WORKING);
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context.sendBroadcast(intent);
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}
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}
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}else
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{
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// No driver for given device, even generic CDC driver could not be loaded
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Intent intent = new Intent(ACTION_USB_NOT_SUPPORTED);
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context.sendBroadcast(intent);
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}
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}
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}
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}
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