我有两个嵌套的RecyclerViews-基本上是水平RecyclerViews的列表，我正在努力使水平RecyclerView中的项目可单击。
这是主要布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/overview_list"
android:visibility="gone"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<components.emptyView.EmptyView
android:id="@+id/empty_state"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="32dp"/>
</LinearLayout>
然后RecyclerView具有以下项目布局：
<?xml version="1.0" encoding="utf-8"?>
<androidx.recyclerview.widget.RecyclerView android:id="@+id/tables"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:clipToPadding="false"
android:paddingEnd="18dp"
android:paddingStart="18dp"/>
我正尝试在适配器中为内部RecyclerView进行onclick设置，如下所示：
@Override
public void onBindViewHolder(@NonNull LeagueTableViewHolder holder, int position) {
Pair<Long, String> table = tables.get(position);
holder.bindTable(table.first, table.second);
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// click event here
}
});
}
我尝试过以编程方式和XML形式使ViewHolder的itemview可单击，但这似乎没有什么不同。内部RecyclerView也一样。
知道我在做什么错吗？
编辑：添加了父RecyclerView适配器
public class OverviewListAdapter extends RecyclerView.Adapter<BaseViewHolder> {
public final static int TEAM_PICTURE = 0;
public final static int FIXTURES = 1;
public final static int LEAGUE_TABLES = 2;
public final static int LATEST_NEWS = 3;
public final static int LATEST_EVENTS = 4;
private final RecyclerView.RecycledViewPool viewPool;
private List<BaseOverviewItemVM> viewModels = new ArrayList<>();
private int tint;
private OverviewLatestNewsVM newsVM;
private OverviewLatestEventsVM eventsVM;
private OverviewTablesVM tablesVM;
private OverviewFixturesVM fixturesVM;
private OverviewTeamPicVM teamPicVM;
OverviewListAdapter(int tint) {
this.tint = tint;
viewPool = new RecyclerView.RecycledViewPool();
}
void addViewModel(OverviewLatestNewsVM viewModel){
if(newsVM == null){
newsVM = viewModel;
viewModels.add(newsVM);
sort();
int viewModelIndex = viewModels.indexOf(newsVM);
notifyItemInsertedIfValid(viewModelIndex);
} else {
int currentNewsIndex = viewModels.indexOf(newsVM);
newsVM = viewModel;
if(currentNewsIndex >= 0) {
this.viewModels.set(currentNewsIndex, newsVM);
}
notifyItemChangedIfValid(currentNewsIndex);
}
}
void addViewModel(OverviewLatestEventsVM viewModel){
if(eventsVM == null){
eventsVM = viewModel;
viewModels.add(eventsVM);
sort();
int viewModelIndex = viewModels.indexOf(eventsVM);
notifyItemChangedIfValid(viewModelIndex);
} else {
int currentIndex = viewModels.indexOf(eventsVM);
eventsVM = viewModel;
if(currentIndex >= 0) {
this.viewModels.set(currentIndex, eventsVM);
}
notifyItemChangedIfValid(currentIndex);
}
}
void addViewModel(OverviewFixturesVM viewModel){
if(fixturesVM == null){
fixturesVM = viewModel;
viewModels.add(fixturesVM);
sort();
int viewModelIndex = viewModels.indexOf(fixturesVM);
notifyItemChangedIfValid(viewModelIndex);
} else {
int currentIndex = viewModels.indexOf(fixturesVM);
fixturesVM = viewModel;
if(currentIndex >= 0) {
this.viewModels.set(currentIndex, fixturesVM);
}
notifyItemChangedIfValid(currentIndex);
}
}
void addViewModel(OverviewTablesVM viewModel){
if(tablesVM == null){
tablesVM = viewModel;
viewModels.add(tablesVM);
sort();
int viewModelIndex = viewModels.indexOf(tablesVM);
notifyItemChangedIfValid(viewModelIndex);
} else {
int currentIndex = viewModels.indexOf(tablesVM);
tablesVM = viewModel;
if(currentIndex >= 0) {
this.viewModels.set(currentIndex, tablesVM);
}
notifyItemChangedIfValid(currentIndex);
}
}
void addViewModel(OverviewTeamPicVM viewModel){
if(teamPicVM == null){
teamPicVM = viewModel;
viewModels.add(teamPicVM);
sort();
int viewModelIndex = viewModels.indexOf(teamPicVM);
notifyItemChangedIfValid(viewModelIndex);
} else {
int currentIndex = viewModels.indexOf(teamPicVM);
teamPicVM = viewModel;
if(currentIndex >= 0) {
this.viewModels.set(currentIndex, teamPicVM);
}
notifyItemChangedIfValid(currentIndex);
}
}
private void sort(){
// sort by the item type defined at the top of this class
Collections.sort(viewModels, (o1, o2) -> {
if(o1.getType() > o2.getType()){
return 1;
} else if(o1.getType() < o2.getType()){
return -1;
}
return 0;
});
}
private void notifyItemInsertedIfValid(int index){
if(index >= 0 && index < getItemCount()){
notifyItemInserted(index);
} else {
notifyDataSetChanged();
}
}
private void notifyItemChangedIfValid(int index){
if(index >= 0 && index < getItemCount()){
notifyItemChanged(index);
} else {
notifyDataSetChanged();
}
}
@NonNull
@Override
public BaseViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
switch (viewType){
case FIXTURES:
View fixturesView = inflater.inflate(R.layout.row_overview_fixtures, parent, false);
OverviewFixturesVH fixturesHolder = new OverviewFixturesVH(fixturesView);
fixturesHolder.fixturesOverview.setRecycledViewPool(viewPool);
return fixturesHolder;
case LEAGUE_TABLES:
View tablesView = inflater.inflate(R.layout.row_overview_league_tables, parent, false);
OverviewTablesVH tablesHolder = new OverviewTablesVH(tablesView);
tablesHolder.tablesList.setRecycledViewPool(viewPool);
return tablesHolder;
case LATEST_EVENTS:
View upcomingEvents = inflater.inflate(R.layout.row_latest_list_view, parent, false);
return new OverviewLatestEventsVH(upcomingEvents, tint);
case TEAM_PICTURE:
View teamPicView = inflater.inflate(R.layout.row_overview_team_pic, parent, false);
return new OverviewTeamPicVH(teamPicView);
default:
View latestNewsView = inflater.inflate(R.layout.row_latest_list_view, parent, false);
return new OverviewLatestNewsVH(latestNewsView, tint);
}
}
@Override
public void onBindViewHolder(@NonNull BaseViewHolder holder, int position) {
if(holder instanceof OverviewFixturesVH) {
Optional<BaseOverviewItemVM> fixturesVM = getViewModelOfType(FIXTURES);
fixturesVM.ifPresent(viewModel -> ((OverviewFixturesVH) holder).setFixtures(((OverviewFixturesVM)viewModel).getFixtures()));
} else if (holder instanceof OverviewTablesVH) {
Optional<BaseOverviewItemVM> tablesVM = getViewModelOfType(LEAGUE_TABLES);
tablesVM.ifPresent(vm -> ((OverviewTablesVH) holder).setTableIds(((OverviewTablesVM) vm).getTableIds()));
} else if (holder instanceof OverviewLatestEventsVH){
Optional<BaseOverviewItemVM> eventsVM = getViewModelOfType(LATEST_EVENTS);
eventsVM.ifPresent(vm -> ((OverviewLatestEventsVH) holder).setEvents(((OverviewLatestEventsVM) vm).getEvents()));
} else if (holder instanceof OverviewLatestNewsVH){
Optional<BaseOverviewItemVM> newsVM = getViewModelOfType(LATEST_NEWS);
newsVM.ifPresent(vm -> ((OverviewLatestNewsVH) holder).setNews(((OverviewLatestNewsVM) vm).getNews()));
} else if (holder instanceof OverviewTeamPicVH){
Optional<BaseOverviewItemVM> teamPicVM = getViewModelOfType(TEAM_PICTURE);
teamPicVM.ifPresent(vm -> ((OverviewTeamPicVH) holder).setPictureUrl(((OverviewTeamPicVM) vm).getTeamPicUrl()));
}
}
@Override
public int getItemViewType(int position) {
return viewModels.get(position).getType();
}
@Override
public int getItemCount() {
return viewModels.size();
}
private Optional<BaseOverviewItemVM> getViewModelOfType(int type){
if(viewModels != null ) {
for (BaseOverviewItemVM viewModel : viewModels) {
if(viewModel.getType() == type){
return Optional.of(viewModel);
}
}
}
return Optional.empty();
}
}
答案 0 :(得分：0)
我认为您将能够处理它以创建一个侦听器并使用它来处理呼叫：
public interface clickListenerItem {
void onItemClick(Item element);
}
将此界面添加到您的adapter和main中。
将此功能添加到您的*nameclass*ViewHolder extends RecyclerView.ViewHolder中：
public void bind(final ItemName item, final clickListenerItem listener) {
itemView.setOnClickListener(new View.OnClickListener() {
@Override public void onClick(View v) {
listener.onItemClick(item);
}
});
}
然后将其添加到您的适配器变量中：private final clickListenerItem clickItem;
在您的构造函数中：this.clickItem = clickItem;
以及在适配器调用的onBindViewHolder中：
public void onBindViewHolder(final @NonNull ItemViewHolder holder, int position) {
holder.bind(list.get(position), clickItem);
}
现在在主适配器上初始化适配器时，只需添加您的监听器，并通过如下调用添加它即可：
adapter = new ItemAdapter(this, list, (new ItemAdapter.clickListenerItem(){
@Override public void onItemClick(Item thisItem) {
Toast.makeText(getApplicationContext(), "Loading Item...", Toast.LENGTH_LONG).show();
Intent viewElem = new Intent(getApplicationContext(), ViewItem.class);
startActivityForResult(viewElem ,codeForResult);
}
}));
我希望这对您有所帮助，很明显，您可以更改不调用新活动的最后一部分，而是根据您要查看或处理的项目进行更改。