Context injection + weak reference

[John]

Hi,

I read the doc about when injecting an Application vs a Context vs an Activity, but I still have some questions.

In a custom adapter, I need to use Picasso to fetch images but it requires a Context.

I've been using different approaches, but not sure which one is the best.

1) Inject Context

public class MyAdapter extends BaseAdapter {

   @Inject private Context context;

    public View getView() {

        // Use context

    }

}

2) Pass an Activity

public class MyAdapter extends BaseAdapter {

    private Context context;

    @Inject MyAdapter(@Assisted Context context) {

        this.context = context;

    }

}

Factory to build MyAdapter:

public interface AdapterFactory {

    MyAdapter createMyAdapter(Context context)

}

And use MyAdapter:

listView.setAdapter(factory.createMyAdapter(getActivity()));

So my questions are:

1) when injecting a Context as class member, do I need to worry about memory leaks?

2) when passing a Context, should I use Assisted Injection, or can I let RoboGuice build it for me in the constructor?

Same if I need a Resources.

3) when passing a Context (assisted or not), do I need to save it as weak reference?

public class MyAdapter extends BaseAdapter {

    private WeakReference<Context> context;

    @Inject MyAdapter(Context context) {

        this.context = new WeakReference<Context>(context);

    }

}

4) in my scenario, it seems that I need an Activity as Context, but I'm not entirely sure... In which situation should I inject an Activity vs a Context?

And by injecting an Activity, it means a generic one, or the active one (like MainActivity, LoginActivity etc)?

Thanks for your help!