1 files changed, 58 insertions, 0 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/UsbConnectionDispatcher.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/UsbConnectionDispatcher.java
new file mode 100644
index 000000000..e48ba7be0
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/UsbConnectionDispatcher.java
@@ -0,0 +1,58 @@
+package org.sufficientlysecure.keychain.util;
+
+import android.app.Activity;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.hardware.usb.UsbDevice;
+import android.hardware.usb.UsbManager;
+
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.ui.UsbEventReceiverActivity;
+import org.sufficientlysecure.keychain.util.Log;
+
+public class UsbConnectionDispatcher {
+    private Activity mActivity;
+
+    private OnDiscoveredUsbDeviceListener mListener;
+    /**
+     * Receives broadcast when a supported USB device get permission.
+     */
+    private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            String action = intent.getAction();
+
+            if (UsbEventReceiverActivity.ACTION_USB_PERMISSION.equals(action)) {
+                UsbDevice usbDevice = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
+                boolean permission = intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED,
+                        false);
+                if (permission) {
+                    Log.d(Constants.TAG, "Got permission for " + usbDevice.getDeviceName());
+                    mListener.usbDeviceDiscovered(usbDevice);
+                }
+            }
+        }
+    };
+
+    public UsbConnectionDispatcher(final Activity activity, final OnDiscoveredUsbDeviceListener listener) {
+        this.mActivity = activity;
+        this.mListener = listener;
+    }
+
+    public void onStart() {
+        final IntentFilter intentFilter = new IntentFilter();
+        intentFilter.addAction(UsbEventReceiverActivity.ACTION_USB_PERMISSION);
+
+        mActivity.registerReceiver(mUsbReceiver, intentFilter);
+    }
+
+    public void onStop() {
+        mActivity.unregisterReceiver(mUsbReceiver);
+    }
+
+    public interface OnDiscoveredUsbDeviceListener {
+        void usbDeviceDiscovered(UsbDevice usbDevice);
+    }
+}