**I want to know how to click the items in childRecyclerview show different fragment, I think we should try to modify childAdapter, I am searching for a long time on net. But no use. Please help or try to give some ideas how to achieve this. hear is my code **
//workflow fragment
public class WorkflowFragment extends Fragment {
private Context mContext;
private String[] workflowHeading;
private String[] workflowContent;
private int[] imageResourceId;
private RecyclerView recyclerview;
private List<Workflow> workflowList;
private WorkflowAdapter workflowAdapter;
private View view;
public static WorkflowFragment newInstance(String param1, String param2) {
WorkflowFragment fragment = new WorkflowFragment();
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
mContext = getActivity();
setHasOptionsMenu(true);
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
if(view==null) {
view = inflater.inflate(R.layout.fragment_workflow, container, false);
}
return view;
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
dataInitialize();
recyclerview = view.findViewById(R.id.workflow_recyclerview);
recyclerview.setLayoutManager(new LinearLayoutManager(getContext()));
recyclerview.setHasFixedSize(true);
workflowAdapter =new WorkflowAdapter(getContext(),workflowList);
recyclerview.setAdapter(workflowAdapter);
workflowAdapter.notifyDataSetChanged();
}
private void dataInitialize() {
//list1
List<String> nestedList1 = new ArrayList<>();
nestedList1.add("A");
nestedList1.add("B");
nestedList1.add("C");
nestedList1.add("D");
nestedList1.add("E");
nestedList1.add("F");
nestedList1.add("G");
//list2
List<String>nestedList2 = new ArrayList<>();
nestedList2.add("H");
nestedList2.add("I");
nestedList2.add("G");
nestedList2.add("K");
//list3
List<String>nestedList3 = new ArrayList<>();
nestedList3.add("L");
nestedList3.add("M");
nestedList3.add("N");
nestedList3.add("P");
nestedList3.add("P");
nestedList3.add("Q");
nestedList3.add("R");
nestedList3.add("S");
//list4
List<String>nestedList4 = new ArrayList<>();
nestedList4.add("T");
nestedList4.add("U");
nestedList4.add("V");
nestedList4.add("W");
//list5
List<String>nestedList5 = new ArrayList<>();
nestedList5.add("X");
//list6
List<String>nestedList6 = new ArrayList<>();
nestedList6.add("Y");
nestedList6.add("Z");
workflowList = new ArrayList<>();
workflowList.add(new Workflow("1",nestedList1));
workflowList.add(new Workflow("2",nestedList2));
workflowList.add(new Workflow("3",nestedList3));
workflowList.add(new Workflow("4",nestedList4));
workflowList.add(new Workflow("5",nestedList5));
workflowList.add(new Workflow("6",nestedList6));
}
@Override
public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
inflater.inflate(R.menu.menu_item,menu);
MenuItem searchItem = menu.findItem(R.id.search_action);
if(searchItem!=null){
SearchView searchView = (SearchView) searchItem.getActionView(); //here stop working
searchView.setMaxWidth(Integer.MAX_VALUE);
searchView.setQueryHint("Search Here!");
searchView.setIconified(false);
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
workflowAdapter.getFilter().filter(query);
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
notifyItemChanged()
workflowAdapter.getFilter().filter(newText);
return false;
}
});
}
super.onCreateOptionsMenu(menu, inflater);
}
}
//ParentAdapter
public class WorkflowAdapter extends RecyclerView.Adapter<WorkflowAdapter.WorkflowViewHolder> implements Filterable{
Context context;
List<Workflow> worflowArrayList;
List<Workflow> worflowArrayListFull;
private List<String>nestedlist = new ArrayList<>();
public WorkflowAdapter(Context context, List<Workflow> worflowArrayList) {
this.context = context;
this.worflowArrayListFull = worflowArrayList;
this.worflowArrayList = new ArrayList<>(worflowArrayListFull);
}
@NonNull
@Override
public WorkflowViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(context).inflate(R.layout.general_list_item,parent,false);
return new WorkflowViewHolder(v);
}
@Override
public void onBindViewHolder(@NonNull WorkflowViewHolder holder, int parentPosition) {
//-get element from your dataset at this position
//-replace the contents of the view with that element
Workflow workflow = worflowArrayList.get(parentPosition);
holder.tvHeading.setText(workflow.getItemText());
//holder.titleImage.setImageResource(model.titleImage);
boolean isExpandable = workflow.isExpandable();
holder.expandableLayout.setVisibility(isExpandable ? View.VISIBLE:View.GONE);
if(isExpandable){
holder.mArrowImage.setImageResource(R.drawable.ic_baseline_arrow_upward_24);
}else{
holder.mArrowImage.setImageResource(R.drawable.ic_baseline_arrow_downward_24);
}
NestedAdapter childAdapter = new NestedAdapter(nestedlist);
holder.nestedRecyclerView.setLayoutManager(new LinearLayoutManager(holder.itemView.getContext()));
holder.nestedRecyclerView.setHasFixedSize(true);
holder.nestedRecyclerView.setAdapter(childAdapter);
holder.linearLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
switch(holder.getAdapterPosition()){
case 1:
Toast.makeText(holder.itemView.getContext(), "Item 11 clicked. ", Toast.LENGTH_SHORT).show();
break;
}
workflow.setExpandable(!workflow.isExpandable());
nestedlist = workflow.getNestedList();
notifyItemChanged(holder.getAdapterPosition());
}
});
}
@Override
public int getItemCount() {
return worflowArrayList.size();
}
@Override
public Filter getFilter() {
return workflowFilter;
}
private final Filter workflowFilter = new Filter(){
@Override
protected FilterResults performFiltering(CharSequence constraint) {
ArrayList<Workflow> filteredWorkflowList = new ArrayList<>();
if (constraint == null || constraint.length() == 0){
filteredWorkflowList.addAll(worflowArrayListFull);
}else{
String filterPattern = constraint.toString().toLowerCase().trim();
for (Workflow workflow: worflowArrayListFull){
if(workflow.itemText.toLowerCase().contains(filterPattern))
filteredWorkflowList.add(workflow);
}
}
FilterResults results = new FilterResults();
results.values = filteredWorkflowList;
results.count = filteredWorkflowList.size();
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
worflowArrayList.clear();
worflowArrayList.addAll((ArrayList)results.values);
notifyDataSetChanged();
}
};
public static class WorkflowViewHolder extends RecyclerView.ViewHolder{
private TextView tvHeading;
private LinearLayout linearLayout;
private RelativeLayout expandableLayout;
private ImageView mArrowImage;
private RecyclerView nestedRecyclerView;
public WorkflowViewHolder(@NonNull View itemView) {
super(itemView);
linearLayout=itemView.findViewById(R.id.linear_layout);
expandableLayout=itemView.findViewById(R.id.expandable_layout);
tvHeading = itemView.findViewById(R.id.tvHeading);
mArrowImage=itemView.findViewById(R.id.arro_imageview);
nestedRecyclerView = itemView.findViewById(R.id.child_rv);
}
}
}
//childAdapter
public class NestedAdapter extends RecyclerView.Adapter<com.larntech.myassistant_java.workflow.NestedAdapter.NestedViewHolder> {
private List<String> childItemList; /
public NestedAdapter(List<String> childItemList){
this.childItemList = childItemList;
}
@NonNull
@Override
public com.larntech.myassistant_java.workflow.NestedAdapter.NestedViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.nested_item,parent,false);
return new com.larntech.myassistant_java.workflow.NestedAdapter.NestedViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull com.larntech.myassistant_java.workflow.NestedAdapter.NestedViewHolder holder, int childPosition) {
holder.mTv.setText(childItemList.get(childPosition));
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
switch(holder.getAdapterPosition()){
case 0:
DemoFragment demoFragment =new DemoFragment();
AppCompatActivity activity=(AppCompatActivity) view.getContext();
activity.getSupportFragmentManager().beginTransaction().replace(R.id.fragment_workflow,demoFragment).addToBackStack(null).commit();
break;
case 1:
FragmentTwo fragmentTwo =new FragmentTwo();
AppCompatActivity activity2=(AppCompatActivity) view.getContext();
activity2.getSupportFragmentManager().beginTransaction().replace(R.id.fragment_workflow,fragmentTwo).addToBackStack(null).commit();
break;
case 2:
Toast.makeText(holder.itemView.getContext(), "Item clicked. ", Toast.LENGTH_SHORT).show();
break;
}
}
});
}
@Override
public int getItemCount() {
return childItemList.size();
}
public class NestedViewHolder extends RecyclerView.ViewHolder{
private TextView mTv;
public NestedViewHolder(@NonNull View itemView) {
super(itemView);
mTv=itemView.findViewById(R.id.nestedItemTv);
}
}
}
