我正尝试在项目点击上实现我在RecyclerView中弹出的不同项目。我在listView中实现了这一点，但RecyclerView似乎很难。我看过类似的问题，但无法得到解决方案。
如果用户点击One，我希望它能做一些事情，也可以用两个，三个。我如何实现这一目标？
以下是我的代码
public class MainFragment extends Fragment implements SearchView.OnQueryTextListener {
public static MainFragment newInstance() {
return new MainFragment();
}
private static final String[] MOVIES = new String[]{ "One", "Two", "Three" };
private RecyclerView mRecyclerView;
private ExampleAdapter mAdapter;
private List<ExampleModel> mModels;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.tms, container, false);
mRecyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);
return view;
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
setHasOptionsMenu(true);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
mModels = new ArrayList<>();
for (String movie : MOVIES) {
mModels.add(new ExampleModel(movie));
}
mAdapter = new ExampleAdapter(getActivity(), mModels);
mRecyclerView.setAdapter(mAdapter);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.search_two, menu);
final MenuItem item = menu.findItem(R.id.action_search);
final SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);
searchView.setOnQueryTextListener(this);
}
@Override
public boolean onQueryTextChange(String query) {
final List<ExampleModel> filteredModelList = filter(mModels, query);
mAdapter.animateTo(filteredModelList);
mRecyclerView.scrollToPosition(0);
return true;
}
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
private List<ExampleModel> filter(List<ExampleModel> models, String query) {
query = query.toLowerCase();
final List<ExampleModel> filteredModelList = new ArrayList<>();
for (ExampleModel model : models) {
final String text = model.getText().toLowerCase();
if (text.contains(query)) {
filteredModelList.add(model);
}
}
return filteredModelList;
}
}
ViewHolder
public class ExampleViewHolder extends RecyclerView.ViewHolder {
private final TextView tvText;
public ExampleViewHolder(View itemView) {
super(itemView);
tvText = (TextView) itemView.findViewById(R.id.tvText);
}
public void bind(ExampleModel model) {
tvText.setText(model.getText());
}
}
这是扩展RecyclerView的适配器 -
public class ExampleAdapter extends RecyclerView.Adapter<ExampleViewHolder> {
private final LayoutInflater mInflater;
private final List<ExampleModel> mModels;
public ExampleAdapter(Context context, List<ExampleModel> models) {
mInflater = LayoutInflater.from(context);
mModels = new ArrayList<>(models);
}
@Override
public ExampleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
final View itemView = mInflater.inflate(R.layout.it_file, parent, false);
return new ExampleViewHolder(itemView);
}
@Override
public void onBindViewHolder(ExampleViewHolder holder, int position) {
final ExampleModel model = mModels.get(position);
holder.bind(model);
}
@Override
public int getItemCount() {
return mModels.size();
}
public void animateTo(List<ExampleModel> models) {
applyAndAnimateRemovals(models);
applyAndAnimateAdditions(models);
applyAndAnimateMovedItems(models);
}
private void applyAndAnimateRemovals(List<ExampleModel> newModels) {
for (int i = mModels.size() - 1; i >= 0; i--) {
final ExampleModel model = mModels.get(i);
if (!newModels.contains(model)) {
removeItem(i);
}
}
}
private void applyAndAnimateAdditions(List<ExampleModel> newModels) {
for (int i = 0, count = newModels.size(); i < count; i++) {
final ExampleModel model = newModels.get(i);
if (!mModels.contains(model)) {
addItem(i, model);
}
}
}
private void applyAndAnimateMovedItems(List<ExampleModel> newModels) {
for (int toPosition = newModels.size() - 1; toPosition >= 0; toPosition--) {
final ExampleModel model = newModels.get(toPosition);
final int fromPosition = mModels.indexOf(model);
if (fromPosition >= 0 && fromPosition != toPosition) {
moveItem(fromPosition, toPosition);
}
}
}
public ExampleModel removeItem(int position) {
final ExampleModel model = mModels.remove(position);
notifyItemRemoved(position);
return model;
}
public void addItem(int position, ExampleModel model) {
mModels.add(position, model);
notifyItemInserted(position);
}
public void moveItem(int fromPosition, int toPosition) {
final ExampleModel model = mModels.remove(fromPosition);
mModels.add(toPosition, model);
notifyItemMoved(fromPosition, toPosition);
}
}
如果用户点击One，我希望它能做一些事情，也是两个和三个。我如何实现这一目标？
答案 0 :(得分：1)
<强> MainActivity.java
public interface ClickListener {
void onClick(View view, int position);
void onLongClick(View view, int position);
}
public static class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private MainActivity.ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final MainActivity.ClickListener clickListener) {
this.clickListener = clickListener;
gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
@Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null) {
clickListener.onLongClick(child, recyclerView.getChildPosition(child));
}
}
});
}
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
clickListener.onClick(child, rv.getChildPosition(child));
}
return false;
}
@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
和
recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getApplicationContext(), recyclerView, new ClickListener() {
@Override
public void onClick(View view, int position) {
Movie movie = movieList.get(position);
Toast.makeText(getApplicationContext(), movie.getTitle() + " is selected!", Toast.LENGTH_SHORT).show();
}
@Override
public void onLongClick(View view, int position) {
}
}));
您必须创建一个界面并让您使用GestureDetector来检测已单击的视图！
请注意，这只是一个给你提示的例子
试着了解一下这段代码中发生了什么，你需要的是你想要的。您可以为您编辑和重复使用此示例。
答案 1 :(得分：1)
您可以将onClickListener绑定到itemView，如下所示：
@Override
public void onBindViewHolder(ExampleViewHolder holder, int position) {
final ExampleModel model = mModels.get(position);
holder.bind(model);
holder.itemView.setOnClickListener( ... {
if(position == 1){
...
}else{
...
}
});
}
或在ExampleViewHolder.bind()中执行此操作，然后您可以将参数传递给它position。
答案 2 :(得分：0)
您可以在适配器的setOnClickListener中添加onBindViewHolder并在那里使用model变量