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Android - Adapter respond to Activity using interface on constructor
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public class MyActivity { | |
private RecyclerView recyclerView; | |
@Override | |
protected void onCreate(Bundle savedInstanceState) { | |
super.onCreate(savedInstanceState); | |
setContentView(R.layout.activity_my); | |
recyclerView = (RecyclerView) findViewById(R.id.recycler_view_categories); | |
setupRecyclerView(); | |
} | |
private void setupRecyclerView() { | |
ArrayList<Message> arr = getMessages(); | |
recyclerView.setHasFixedSize(true); | |
recyclerView.setAdapter(new MyAdapter(this, arr, new MyAdapter.Listener() { | |
@Override | |
public void onEventOne() { | |
// stuff | |
} | |
@Override | |
public void onEventTwo(Message msg) { | |
// stuff | |
} | |
})); | |
recyclerView.setLayoutManager(new GridLayoutManager(this, 1)); | |
} | |
} |
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class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{ | |
private List<Message> list = new ArrayList<>(); | |
private FragmentActivity context; | |
private Listener mCallback; | |
public interface Listener { | |
void onEventOne(); | |
void onEventTwo(Message msg); | |
} | |
private MyAdapter(FragmentActivity context, List<Message> list, Listener listener){ | |
this.list = list; | |
this.context = context; | |
this.mCallback = listener; | |
} | |
... | |
@Override | |
public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) { | |
final Message item = (Message) list.get(position); | |
holder.itemView.setOnClickListener(v -> { | |
mCallback.onEventOne(); | |
}); | |
} | |
} |
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