使用setOnClickListener将项绑定到位置

Question

在我的RecyclerView中，当使用setOnClickListener点击它们时，有几个items，Fragmet打开，但有一个问题，item的position没有连接到setOnClickListener position。如果我进行了排序，item的position发生了更改，setOnClickListener的position没有，第一个item上的度数将始终打开同一个Fragmet。如何将它们联系起来？正如我在属性所在的文件中所理解的那样，我需要在setOnClickListener中为其分配一些变量，但这只是猜测。

帮助编写代码，或者至少提供一个代码外观示例。因为我根本不懂

现在我在适配器和开关中有一个位置的变化。如何将其绑定到exampleList=new ArrayList<gt；((；？

@Override
public void onBindViewHolder(AttractionsViewHolder holder, int position) {
AttractionsItem currentItem = mFavList.get(position);
holder.card_image_1.setImageResource(currentItem.getImg1());
holder.card_image_2.setImageResource(currentItem.getImg2());
holder.card_text_1.setText(currentItem.get_attraction_name());
holder.card_text_2.setText(currentItem.get_attraction_type());
holder.card_text_3.setText(currentItem.get_attraction_cost());
holder.Card.setOnClickListener(v -> {
switch (position) {
case 0: {
FragmentBabyIsland fragment = new FragmentBabyIsland(); // you fragment
FragmentManager fragmentManager = ((FragmentActivity) v.getContext()).getSupportFragmentManager(); // instantiate your view context
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setCustomAnimations(R.animator.nav_default_enter_anim, R.animator.nav_default_exit_anim,
R.animator.nav_default_pop_enter_anim, R.animator.nav_default_pop_exit_anim);
fragmentTransaction.replace(R.id.fragment, fragment);// your container and your fragment
fragmentTransaction.addToBackStack("tag");
fragmentTransaction.commit();
break;
}
case 1: {
FragmentJumpAround fragment = new FragmentJumpAround(); // you fragment
FragmentManager fragmentManager = ((FragmentActivity) v.getContext()).getSupportFragmentManager(); // instantiate your view context
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setCustomAnimations(R.animator.nav_default_enter_anim, R.animator.nav_default_exit_anim,
R.animator.nav_default_pop_enter_anim, R.animator.nav_default_pop_exit_anim);
fragmentTransaction.replace(R.id.fragment, fragment);// your container and your fragment
fragmentTransaction.addToBackStack("tag");
fragmentTransaction.commit();
break;
}
case 2: {
FragmentMerryGoRound fragment = new FragmentMerryGoRound(); // you fragment
FragmentManager fragmentManager = ((FragmentActivity) v.getContext()).getSupportFragmentManager(); // instantiate your view context
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setCustomAnimations(R.animator.nav_default_enter_anim, R.animator.nav_default_exit_anim,
R.animator.nav_default_pop_enter_anim, R.animator.nav_default_pop_exit_anim);
fragmentTransaction.replace(R.id.fragment, fragment);// your container and your fragment
fragmentTransaction.addToBackStack("tag");
fragmentTransaction.commit();
break;
}
case 3: {
FragmentFiveDCinema fragment = new FragmentFiveDCinema(); // you fragment
FragmentManager fragmentManager = ((FragmentActivity) v.getContext()).getSupportFragmentManager(); // instantiate your view context
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setCustomAnimations(R.animator.nav_default_enter_anim, R.animator.nav_default_exit_anim,
R.animator.nav_default_pop_enter_anim, R.animator.nav_default_pop_exit_anim);
fragmentTransaction.replace(R.id.fragment, fragment);// your container and your fragment
fragmentTransaction.addToBackStack("tag");
fragmentTransaction.commit();
break;
}
}
});
}

RecyclerView所在的Fragment

public class FragmentAttractionRecyclerView extends Fragment {
private RecyclerView mRec;
private AttractionsAdapter adapter;
private ArrayList<AttractionsItem> exampleList;
private RecyclerView.LayoutManager mLayoutManager;
private String[]mArraysNames= new String[]{"Baby островок","Виражи","Вокруг света","5D кинотеатр"};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_attraction_test_2, container, false);
}
@SuppressLint("InflateParams")
@Override
public void onViewCreated(@NonNull final View view, @Nullable Bundle savedInstanceState) {
createExampleList();
buildRecyclerView();
ImageView sort_alphabet = requireView().findViewById(R.id.sort_alphabet);
sort_alphabet.setOnClickListener(v -> {
sortArray();
sortArrayList();
});
}
private void sortArray(){
Arrays.sort(mArraysNames);
adapter.notifyDataSetChanged();
}
private void sortArrayList(){
Collections.sort(exampleList, (o100, o200) -> o100.get_attraction_cost().compareTo(o200.get_attraction_cost()));
adapter.notifyDataSetChanged();
}
public void createExampleList() {
exampleList = new ArrayList<>();
exampleList.add(new AttractionsItem(R.mipmap.unnamed, R.drawable.ic_kid, "Baby островок", "Детский", "60₽"));
exampleList.add(new AttractionsItem(R.mipmap.unnamed, R.drawable.ic_kid, "Виражи", "Детский", "80₽"));
exampleList.add(new AttractionsItem(R.mipmap.unnamed, R.drawable.ic_kid, "Вокруг света", "Детский", "50₽"));
exampleList.add(new AttractionsItem(R.mipmap.unnamed, R.drawable.ic_interactive, "5D кинотеатр", "Интерактивный", "120₽"));
}
public void buildRecyclerView() {
mRec = requireView().findViewById(R.id.attraction_recycler);
adapter = new AttractionsAdapter(exampleList);
mLayoutManager = new LinearLayoutManager(getContext());
mRec.setLayoutManager(mLayoutManager);
mRec.setAdapter(adapter);
}
}

Adapter

public class AttractionsAdapter extends RecyclerView.Adapter<AttractionsAdapter.AttractionsViewHolder> {
public ArrayList<AttractionsItem> mFavList;
public AttractionsAdapter(ArrayList<AttractionsItem> favList) {
mFavList = favList;
}
@NonNull
@Override
public AttractionsViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_attraction, parent, false);
AttractionsViewHolder evh = new AttractionsViewHolder(v);
return evh;
}
public static class AttractionsViewHolder extends RecyclerView.ViewHolder {
public ImageView card_image_1, card_image_2;
public TextView card_text_1, card_text_2, card_text_3, attraction_menu_1_1, attraction_menu_1_2;
public CardView Card;
public AttractionsViewHolder(View itemView) {
super(itemView);
card_image_1 = itemView.findViewById(R.id.card_image_1);
card_image_2 = itemView.findViewById(R.id.card_image_2);
card_text_1 = itemView.findViewById(R.id.card_text_1);
card_text_2 = itemView.findViewById(R.id.card_text_2);
card_text_3 = itemView.findViewById(R.id.card_text_3);
attraction_menu_1_1 = itemView.findViewById(R.id.attraction_menu_1_1);
attraction_menu_1_2 = itemView.findViewById(R.id.attraction_menu_1_2);
Card = itemView.findViewById(R.id.Card);
}
}
@Override
public void onBindViewHolder(AttractionsViewHolder holder, int position) {
AttractionsItem currentItem = mFavList.get(position);
holder.card_image_1.setImageResource(currentItem.getImg1());
holder.card_image_2.setImageResource(currentItem.getImg2());
holder.card_text_1.setText(currentItem.get_attraction_name());
holder.card_text_2.setText(currentItem.get_attraction_type());
holder.card_text_3.setText(currentItem.get_attraction_cost());
holder.Card.setOnClickListener(v -> {
switch (position) {
case 0: {
FragmentBabyIsland fragment = new FragmentBabyIsland(); // you fragment
FragmentManager fragmentManager = ((FragmentActivity) v.getContext()).getSupportFragmentManager(); // instantiate your view context
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setCustomAnimations(R.animator.nav_default_enter_anim, R.animator.nav_default_exit_anim,
R.animator.nav_default_pop_enter_anim, R.animator.nav_default_pop_exit_anim);
fragmentTransaction.replace(R.id.fragment, fragment);// your container and your fragment
fragmentTransaction.addToBackStack("tag");
fragmentTransaction.commit();
break;
}
case 1: {
FragmentJumpAround fragment = new FragmentJumpAround(); // you fragment
FragmentManager fragmentManager = ((FragmentActivity) v.getContext()).getSupportFragmentManager(); // instantiate your view context
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setCustomAnimations(R.animator.nav_default_enter_anim, R.animator.nav_default_exit_anim,
R.animator.nav_default_pop_enter_anim, R.animator.nav_default_pop_exit_anim);
fragmentTransaction.replace(R.id.fragment, fragment);// your container and your fragment
fragmentTransaction.addToBackStack("tag");
fragmentTransaction.commit();
break;
}
case 2: {
FragmentMerryGoRound fragment = new FragmentMerryGoRound(); // you fragment
FragmentManager fragmentManager = ((FragmentActivity) v.getContext()).getSupportFragmentManager(); // instantiate your view context
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setCustomAnimations(R.animator.nav_default_enter_anim, R.animator.nav_default_exit_anim,
R.animator.nav_default_pop_enter_anim, R.animator.nav_default_pop_exit_anim);
fragmentTransaction.replace(R.id.fragment, fragment);// your container and your fragment
fragmentTransaction.addToBackStack("tag");
fragmentTransaction.commit();
break;
}
case 3: {
FragmentFiveDCinema fragment = new FragmentFiveDCinema(); // you fragment
FragmentManager fragmentManager = ((FragmentActivity) v.getContext()).getSupportFragmentManager(); // instantiate your view context
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setCustomAnimations(R.animator.nav_default_enter_anim, R.animator.nav_default_exit_anim,
R.animator.nav_default_pop_enter_anim, R.animator.nav_default_pop_exit_anim);
fragmentTransaction.replace(R.id.fragment, fragment);// your container and your fragment
fragmentTransaction.addToBackStack("tag");
fragmentTransaction.commit();
break;
}
}
});
}
@Override
public int getItemCount() {
return mFavList.size();
}
}

item

public class AttractionsItem
{
private int mImg_1,mImg_2;
private final String mText_attraction_name;
private final String mText_attraction_type;
private final String mText_attraction_cost;

public AttractionsItem(int img1,int img2, String text_attraction_name, String text_attraction_type, String text_attraction_cost)
{
mImg_1 = img1;
mImg_2 = img2;
mText_attraction_name = text_attraction_name;
mText_attraction_type = text_attraction_type;
mText_attraction_cost = text_attraction_cost;
}
public int getImg1()
{
return mImg_1;
}
public int getImg2()
{
return mImg_2;
}
public String get_attraction_name()
{
return mText_attraction_name;
}
public String get_attraction_type()
{
return mText_attraction_type;
}
public String get_attraction_cost()
{
return mText_attraction_cost;
}
}

Answer 1

要获得recyclerView项的正确位置，请不要在onBindViewHolder内的onClickListener中使用position，而是使用holder.getAdapterPosition();或holder.getBindingAdapterPosition();

所以不是

holder.Card.setOnClickListener(v -> {
switch (position) {
case 1: 
...
break;

case 2: 
...
break;
}
case 3: 
...
break;
}
}
});

使用

holder.Card.setOnClickListener(v -> {
switch (holder.getAdapterPosition()) {
case 1: 
...
break;
case 2: 
...
break;
}
case 3: 
...
break;
}
}
});