Question

Given the code:

public class CommandSequence {

public CommandSequence() {
}

public void startCommunications(View v) {
    Bundle dataout1 = new Bundle();
    dataout1.putInt("ACTION", Communications.ACTION_LOAD_COMMAND_ONLY);
    dataout1.putInt("PORT", Commands.MESSAGE_TYPE_SMC);
    dataout1.putInt("COMMAND", Commands.SMC_RESETEVENTSTATUS);
    ((MainActivity) v.getContext()).sendMessageToBackgroundCommunicationsService(
        Communications.MESSAGE_LOAD_COMMAND,
        dataout1);
}
}

I must cast ‘sendMessageToBackgroundCommunicationsService()’ with the calling activity context, which is ‘MainActivity’.

Is it possible to pass a parameter that will allow me to cast the method call at runtime, so that this method can be called from any activity class?

Answer 1

Why not create a base activity class that all your activies inherit and then cast to this instead when you need to make a call:

((MyBaseActivity) v.getContext()).sendMessageToBackgroundCommunicationsService(
    Communications.MESSAGE_LOAD_COMMAND,
    dataout1);

[EDIT] In fact to make your code a bit better you could pass the activity into your method so there is no dependency on your class needing to know another class.

public void startCommunications(View v, Class myActivity) {
 //your code
}