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Start your free trialFahad Saleem
Courses Plus Student 10,786 PointsCallback interface method isn't working for me! It isn't able to recognize which view is clicked? Please have a look.
Here's is my MainActivity:
public class MainActivity extends AppCompatActivity implements List_Fragment.onRecipeSelectedInterface {
private final String TAG = getClass().getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
List_Fragment savedFragment = (List_Fragment) getFragmentManager().findFragmentById(R.id.placeHolder);
if(savedFragment==null){
List_Fragment fragment = new List_Fragment();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.add(R.id.placeHolder,fragment);
transaction.commit();
}
}
@Override
public void onRecipeSelected(int index) {
Log.d(TAG, "It's being clicked!");
Toast.makeText(this, Recipes.names[index], Toast.LENGTH_SHORT).show();
}
}
My Class which has implemented Fragment
public class List_Fragment extends Fragment {
public interface onRecipeSelectedInterface{
void onRecipeSelected(int index);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.recipe_layout, container, false);
onRecipeSelectedInterface listener = (onRecipeSelectedInterface) getActivity();
RecyclerView recyclerView = view.findViewById(R.id.recyclerView);
Adapter adapter = new Adapter(view.getContext(), listener);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.setAdapter(adapter);
return view;
}
}
Adapter Class
public class Adapter extends RecyclerView.Adapter<Adapter.Holder>{
private final List_Fragment.onRecipeSelectedInterface listener;
private Context context;
public Adapter(Context context, List_Fragment.onRecipeSelectedInterface listener) {
this.listener = listener;
this.context = context;
}
@NonNull
@Override
public Holder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_items,parent,false);
return new Holder(view);
}
@Override
public void onBindViewHolder(@NonNull Holder holder, final int position) {
((Holder)holder).bindView(position);
}
@Override
public int getItemCount() {
return Recipes.names.length;
}
class Holder extends RecyclerView.ViewHolder implements View.OnClickListener{
TextView textView;
ImageView imageView;
int index;
void bindView(int position){
textView.setText(Recipes.names[position]);
imageView.setImageResource(Recipes.resourceIds[position]);
index = position;
Log.d("TAG", index + "");
}
Holder(View itemView) {
super(itemView);
textView = itemView.findViewById(R.id.nameTextView);
imageView = itemView.findViewById(R.id.imageView);
}
@Override
public void onClick(View v) {
listener.onRecipeSelected(index);
}
}
}