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POBroadcastReceiver fires after the activity is already created
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Id
10450473
data
AcceptedAnswerId
10450627
AnswerCount
1
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2012-05-04T14:06:06.587
FavoriteCount
0
LastActivityDate
2012-05-04T14:23:44.317
LastEditDate
LastEditorUserId
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OwnerUserId
1302643
ParentId
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PostTypeId
1
Score
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ViewCount
1143
LastEditorDisplayName
text
Body
I want to use a BroadcastReceiver to get permission to communicate with a USB device. I am trying to implement it the same way it is done on android website <a href="http://developer.android.com/guide/topics/usb/host.html" rel="nofollow">http://developer.android.com/guide/topics/usb/host.html</a> It all works, kind of. But the broadcastReceiver is fireing only after the main activity is created. Which means I am able to communicate with the device only after close the app and open it again (when I don't unregister the broadcastReceiver, when I do I can't communicate at all). What can be the reason? My code is like this: private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() { <pre><code> public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (ACTION_USB_PERMISSION.equals(action)) { synchronized (this) { device = (UsbDevice) intent.getParcelableExtra(UsbManager.EXTRA_DEVICE); if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) { if(device != null) { //things I do when the permission is granted } } else { devMessage = "permission denied for device "; } } } } }; </code></pre> The part of the code where I register it: public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); <pre><code> mUsbManager = (UsbManager) getSystemService(Context.USB_SERVICE); mPermissionIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0); filter = new IntentFilter(ACTION_USB_PERMISSION); registerReceiver(mUsbReceiver, filter); HashMap<String, UsbDevice> deviceList = mUsbManager.getDeviceList(); Iterator<UsbDevice> deviceIterator = deviceList.values().iterator(); while(deviceIterator.hasNext()) { device = deviceIterator.next(); mUsbManager.requestPermission(device, mPermissionIntent); } // ... if(device!=null) { // ... } else { // ... } tv.setText(devMessage); } </code></pre> Does anyone know why is this happening, what I might be doing wrong?
Tags
<android><usb><broadcastreceiver>
Title
BroadcastReceiver fires after the activity is already created
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PostAcceptedAnswerId
1. PO
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 PostTypePostTypeId
 PTAnswer
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1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
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1. This table or related slice is empty.
UserOwnerUserId
1. USMagda
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PostLinksRelatedPostIdPostId
1. PL
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PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
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