Android从接收器到活动

Question

I'm just getting into Android development, and I have a question about communicating between a receiver class and an activity class. I'm very new to JAVA and Android so I hope I don't sound too stupid. I'm developing an application where I intercept an SMS message and then based on various elements of that SMS I might delete it once it's been saved to the inbox. I have a receiver class that intercepts the txt message, and I am also able to delete messages from my inbox with code in the activity class using a button at the moment. The problem I have is communicating between the receiver class and the activity class where the code to delete a message resides. I tried putting that code directly into the receiver class but as I'm sure most of you already know the BroadcastReceiver class doesn't seem to support what I need to delete messages. I've been searching for an answer to this for a while, but haven't been able to find anything. Honestly I'm not sure I know enough about JAVA and Android to even recognize a solution if I saw it.

Answer 1

You could implement the handling messages logic using an IntentService. When your receiver gets the new incomming message, start the IntentService passing an intent with the message data.

Receiver

onReceive(Context context, Intent intent) {
    //Setup Intent
    Intent i = new Intent(context, MyIntentService.class);
    i.setAction(MyIntentService.HANDLE_MESSAGE);        
    //Pass data to intent
    i.putExtra(MyIntentService.MESSAGE_DATA, data);
    //Start Intent Service          
    context.startService(i);
}

MyIntentService

onHandleIntent(Intent i){
    String action = i.getAction();
    if(action != null && action.equals(MyIntentService.HANDLE_MESSAGE){
        //Get data and implement message logic
    }
}

Hope it helps.

Answer 2

If you need to complete a job without an interface look into creating a Service , if you need user interface just start an Activity

You can use the Context parameter of the onReceive method of the receiver to start a new service/activity

You can use Extras to pass params between context. So you can put as extra the message id or entire message and pass it to your service/activity and deal it there.