I'm creating a in the mechanisms used to receive the USB insert radio, broadcast is in a Fragment,

I tried the first method, the result is feasible, I am new in onCreate directly a broadcast and then rewrite the onReceive, registered in onResume Filter and radio receiver, cancellation receiver in onDestory,

Then I want to have for the broadcast receiver on a single class, called UsbBroadcastReceiver, then rewrite the onReceive inside, in the onCreate fragments new class - this class, no other and cancellation of change, but such writing, I can't receive the USB insert the radio, I wonder whether I am creating a class and use of the broadcast time is what's the problem? Don't know whether someone give me answer that question, thank you


onReceive method

 
Public class UsbBroadcastReceiver extends BroadcastReceiver {
Private static final String TAG="UsbBroadcastReceiver"; 

@ Override 
Public void onReceive (Context Context, Intent Intent) {
The d (TAG, "onReceive:" + intent. GetAction ()); 
String intentAction=intent. GetAction (); 
If (UsbManager. ACTION_USB_DEVICE_ATTACHED. Equals (intentAction)) {
The d (TAG, "onReceive, radio reception to insert the USB device intent"); 
} 
} 
} 

Filter registered broadcasting method, this method will be invoked in onResume

 
Private void setFilter () {
IntentFilter filter=new IntentFilter (); 
Filter. AddAction (ACTION_USB_PERMISSION); 
Filter. AddAction (UsbManager. ACTION_USB_DEVICE_ATTACHED); 
Filter. AddAction (UsbManager. ACTION_USB_DEVICE_DETACHED); 
GetActivity (). GetApplicationContext (.) registerReceiver (mUsbReceiver, filter); 
} 

New my radio receiver in onCreate

 
@ Override 
Public void onCreate (@ Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState); 
MUsbReceiver=new UsbBroadcastReceiver (); 
The d (TAG, "onCreate: first create."); 
} 

CodePudding user response:

Do you confirm to use the same Context object

CodePudding user response:

Thank you, your answer is very interesting, in fact, I think I should also is the problem, but my understanding of the context is not enough in-depth,

If I create a broadcastreceiver in fragments, it is my current use of fragments of the context, but in this case, I even in I went to the new current in the fragments of my custom radio receiver, but can't accurately passed on context,

Also, if I have two fragments, at the same time to create the radio receiver, that they are to deal with global broadcast (as long as the filter) through me, that I how to distinguish the two radio receiver?

reference 1st floor BDMH response:

do you use the same Context object a confirmation

CodePudding user response:

An application of the application may have only one, you said that you used the two radio receiver, if you write class name repetition made a mistake,

Delete unrelated content, the whole post

CodePudding user response:

Another way of thinking, directly in the AndroidManifest. XML defined in the radio receiver. Consult
The android: name=". UsbBroadcastReceiver "
Android: enabled="true"
Android: exported="false"
Android: label="UsbBroadcastReceiver" & gt;