I manage to make a list with RecyclerView and now I want to delete a row by clicking on that row.
But when I click on it, nothing happens and when I click again I get IndexOutOfBoundsException
.
I am struggling to find the exception...
This is my MainActivity.class
MyRecyclerViewAdapter adapter;
ArrayList<ExampleItem> movieList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// data to populate the RecyclerView with
movieList = new ArrayList<>();
movieList.add(new ExampleItem("Dr. No", "1962", "Sean Connery"));
movieList.add(new ExampleItem("From Russia with Love", "1963", "Sean Connery"));
movieList.add(new ExampleItem("Goldfinger", "1964", "Sean Connery"));
movieList.add(new ExampleItem("Thunderball", "1965", "Sean Connery"));
movieList.add(new ExampleItem("You Only Live Twice", "1967", "Sean Connery"));
RecyclerView recyclerView = findViewById(R.id.homeRecyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
adapter = new MyRecyclerViewAdapter(this, movieList);
adapter.setClickListener(this); //MyRecyclerViewAdapter.ItemClickListener muss implementiert!
recyclerView.setAdapter(adapter);
}
@Override
public void onItemClick(View view, int position) {
movieList.remove(position);
}
And here is my Adapter class (I shortened the code)
public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> {
private List<ExampleItem> mList;
private LayoutInflater mInflater;
private ItemClickListener mClickListener;
// data is passed into the constructor
MyRecyclerViewAdapter(Context context, List<ExampleItem> data) {
this.mInflater = LayoutInflater.from(context);
this.mList = data; //List is passed and is set into the variable above
}
// inflates the row layout from xml when needed
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mInflater.inflate(R.layout.recyclerview_items, parent, false);
return new ViewHolder(view);
}
// binds the data to the TextView in each row
@Override //Pass the value with this method:
public void onBindViewHolder(ViewHolder holder, int position) {
ExampleItem currentItem = mList.get(position);
holder.titleView.setText(currentItem.getText1());
holder.yearView.setText(currentItem.getText2());
holder.actorView.setText(currentItem.getText3());
}
// total number of rows
@Override
public int getItemCount() {
return mList.size();
}
//RecyclerView.ViewHolder
// stores and recycles views as they are scrolled off screen
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public final View mView;
TextView titleView;
TextView yearView;
TextView actorView;
ViewHolder(View itemView) {
super(itemView);
mView = itemView;
titleView = itemView.findViewById(R.id.title);
yearView = itemView.findViewById(R.id.year);
actorView = itemView.findViewById(R.id.actor);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View view) {
if (mClickListener != null) mClickListener.onItemClick(view, getAdapterPosition());
}
}
// allows clicks events to be caught
void setClickListener(ItemClickListener itemClickListener) {
this.mClickListener = itemClickListener;
}
// parent activity will implement this method to respond to click events
public interface ItemClickListener {
void onItemClick(View view, int position);
}
}
Do I have to update the list after deleting an item maybe?
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