Question

so from what i gather, Socket connections are neither serializable or parcelable, but i need to pass a bluetooth connection to another Activity. i do not want to write a Service as a middle man, so please don’t post this as a solution. i’ve heard that there is a way to pass these types of Objects using a custom Application interface, but i cannot, for the life of me, find a working example of this. i’ve seen plenty of documentation that says something to the effect of “this is possible” but nothing showing how to do it.

Answer 1

Define your app class:

class MyApplication extends Application{
    // your fields here
}

Add name attribute to app manifest.

<application android:name=".MyApplication" ../>

Use it in Activity:

MyApplication myapp = (MyApplication) getApplication();