Merge pull request #86 from fpvout/fix/broadcastIntentError

fix app crash when usb was disconnected and screen was off.

Author: jlucidar

app/src/main/java/com/fpvout/digiview/MainActivity.java

@@ -246,7 +246,7 @@ public void usbDeviceApproved(UsbDevice device) {
     public void usbDeviceDetached() {
         Log.i(TAG, "USB - usbDevice detached");
         showOverlay(R.string.usb_device_detached_waiting, OverlayStatus.Disconnected);
-        this.onStop();
+        disconnect();
     }
 
     private boolean searchDevice() {
@@ -339,14 +339,17 @@ private void hideOverlay() {
         autoHideSettingsButton();
     }
 
+    private void disconnect() {
+        mUsbMaskConnection.stop();
+        mVideoReader.stop();
+        usbConnected = false;
+    }
+
     @Override
     protected void onStop() {
         super.onStop();
         Log.d(TAG, "APP - On Stop");
-
-        mUsbMaskConnection.stop();
-        mVideoReader.stop();
-        usbConnected = false;
+        disconnect();
     }
 
     @Override