app/src/main/java/ai/suanzi/rtmpclient/UsbMonitor.java

   1 package ai.suanzi.rtmpclient;
   2
   3 import android.hardware.usb.UsbManager;
   4 import android.content.Context;
   5 import android.hardware.usb.UsbDevice;
   6
   7 import java.util.ArrayList;
   8 import java.util.HashMap;
   9 import java.util.Iterator;
  10 import java.util.List;
  11 import org.apache.log4j.Logger;
  12 import android.app.PendingIntent;
  13 import android.content.Intent;
  14 import android.content.IntentFilter;
  15 import android.content.BroadcastReceiver;
  16
  17 public class UsbMonitor {
  18
  19     private UsbListener mListener;
  20     private Context mContext;
  21     private UsbManager mUsbManager;
  22     private List<UsbDevice> mUsbCameraList = new ArrayList<>();
  23
  24     private static Logger gLogger = Logger.getLogger("UsbMonitor");
  25
  26     public UsbMonitor(UsbListener listener, Context context){
  27         mListener = listener;
  28         mContext = context;
  29         mUsbManager = (UsbManager) mContext.getSystemService(Context.USB_SERVICE);
  30
  31         HashMap<String, UsbDevice> deviceList = mUsbManager.getDeviceList();
  32         gLogger.error("device list size : " + deviceList.size());
  33         Iterator<UsbDevice> deviceIterator = deviceList.values().iterator();
  34         //PendingIntent mPermissionIntent = PendingIntent.getBroadcast(mContext, 0, new Intent(ACTION_USB_PERMISSION), 0);
  35         IntentFilter filter = new IntentFilter(UsbManager.ACTION_USB_DEVICE_DETACHED);
  36         mContext.registerReceiver(mUsbReceiver, filter);
  37         filter = new IntentFilter(UsbManager.ACTION_USB_DEVICE_ATTACHED);
  38         mContext.registerReceiver(mUsbReceiver, filter);
  39         filter = new IntentFilter(ACTION_USB_PERMISSION);
  40         mContext.registerReceiver(mUsbReceiver, filter);
  41
  42         while (deviceIterator.hasNext()) {
  43             UsbDevice device = deviceIterator.next();
  44             gLogger.error(device.toString());
  45             if(isUvcCamera(device))  mUsbCameraList.add(device);
  46         }
  47             //mUsbManager.requestPermission(device, mPermissionIntent);
  48     }
  49
  50     public void unregisterReceiver (){
  51         mContext.unregisterReceiver(mUsbReceiver);
  52
  53     }
  54
  55     private boolean isUvcCamera(UsbDevice device){
  56         return device.getProductName().toLowerCase().contains("camera") || (device.getDeviceProtocol() == 1);
  57     }
  58
  59     public boolean hasUsbCamera(){
  60         gLogger.error("hasUsbCamera - size: " + mUsbCameraList.size());
  61         return (mUsbCameraList.size() > 0 ? true : false);
  62     }
  63
  64     public int getUsbCameraCount(){
  65         return mUsbCameraList.size();
  66     }
  67
  68     private static final String ACTION_USB_PERMISSION =  "ai.suanzi.rtmpclient.UsbMonitor.USB_PERMISSION";
  69
  70     private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
  71
  72         public void onReceive(Context context, Intent intent) {
  73             gLogger.error("onReceive");
  74             String action = intent.getAction();
  75             if (ACTION_USB_PERMISSION.equals(action)) {
  76                 synchronized (this) {
  77                     UsbDevice device = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
  78
  79                     if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, true)) {
  80                         if(device != null){
  81                             gLogger.error( "extra permission granted");
  82                             //call method to set up device communication
  83                         }
  84                     }
  85                     else {
  86                         gLogger.error("permission denied for device. " + device);
  87                     }
  88                 }
  89             } else if (UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action)){
  90                 UsbDevice device = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
  91                 if (device != null){
  92                     gLogger.error("Device plug out");
  93                     gLogger.error(device.toString());
  94                     if(isUvcCamera(device)) {
  95                         mUsbCameraList.remove(device);
  96                         mListener.onCameraDisconnected();
  97                     }
  98                 }
  99             } else if (UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(action)) {
 100                 UsbDevice device = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
 101                 gLogger.error("Device plug in");
 102                 gLogger.error(device.toString());
 103                 if(isUvcCamera(device)) {
 104                     mUsbCameraList.add(device);
 105                     mListener.onCameraConnected();
 106                 }
 107             }
 108         }
 109     };
 110
 111     public interface UsbListener {
 112         void onCameraConnected();
 113         void onCameraDisconnected();
 114     }
 115 }