I'm not quite sure if this is possible, but I'm trying to change the content of a custom DialogFragment (read: content as in 1 imageview, and 3 textviews) inside of a Recyclerview adapter.
My current custom DialogFragment:
public class ServiceDialogFragment extends DialogFragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.service_card, container, false);
}
}
And the layout:
As you see in the image above: I have a list behind the where the DialogFragment is displayed and whenever I press one of those "buttons" that DialogFragment appears. But my question is: how do I change the content of the custom DialogFragment inside of my Recyclerview Adapter?
My adapter:
public class ServiceAdapter extends RecyclerView.Adapter<ServiceAdapter.ViewHolder>{
private final String TAG = "******* Service Adapter";
private ArrayList<ServiceObject> mDataset;
private Context mContext;
private Resources mResources;
private Context location;
public ServiceAdapter(ArrayList<ServiceObject> mDataset, Context mContext, Resources mResources) {
this.mDataset = mDataset;
this.mContext = mContext;
this.mResources = mResources;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
location = parent.getContext();
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.service_box, parent, false);
return new ViewHolder(v);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.title.setText(mDataset.get(position).getTitle());
holder.icon.setImageResource(mResources.getIdentifier(Integer.toString(mDataset.get(position).getIcon()), "drawable", "net.example.adapter"));
}
#Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
#Override
public int getItemCount() {
return mDataset == null ? 0 : mDataset.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
TextView title, desc, price;
ImageView icon;
public ViewHolder(View v) {
super(v);
title = (TextView) v.findViewById(R.id.service_box_title);
price = (TextView) v.findViewById(R.id.service_card_price);
icon = (ImageView) v.findViewById(R.id.service_box_icon);
v.setOnClickListener(this);
}
#Override
public void onClick(View v) {
FragmentActivity activity = (FragmentActivity)(mContext);
FragmentManager fm = activity.getSupportFragmentManager();
ServiceDialogFragment alertDialog = new ServiceDialogFragment();
alertDialog.show(fm, "display_service");
}
}
}
Thanks to #raghunandan, I figured it out. Resource: http://developer.android.com/reference/android/app/DialogFragment.html
Related
I am adding data into an addToSepetims arraylist and I want to use it in another fragment but I cant get this arraylist
public class productAdapter extends RecyclerView.Adapter<productAdapter.ViewHolder> {
ArrayList<product_bilgileri> product_bilgileris = new ArrayList<product_bilgileri>();
LayoutInflater layoutInflater;
Context context;
ArrayList<AddToSepetim> addToSepetims = new ArrayList<AddToSepetim>();
public productAdapter(ArrayList<product_bilgileri> product_bilgileris, Context context) {
this.product_bilgileris = product_bilgileris;
this.context = context;
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
holder.productName.setText(product_bilgileris.get(position).getProductname());
holder.description.setText(product_bilgileris.get(position).getDescription());
holder.imageView.setImageDrawable(context.getResources().getDrawable(product_bilgileris.get(position).getImage()));
holder.ratingBar.setRating((product_bilgileris.get(position).getRating()));
holder.button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String a =holder.productName.getText().toString();
String b =holder.description.getText().toString();
int c = R.drawable.iphone5;
//Toast.makeText(context, ""+a, Toast.LENGTH_SHORT).show();
addToSepetims.add(new AddToSepetim(a,b,c));
}
});
}
This is Where I want to use addToSepetims arraylist :
public class SepetimFragment extends Fragment {
RecyclerView recyclerView;
ArrayList<AddToSepetim> addToSepetims = new ArrayList<AddToSepetim>();
public SepetimFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_sepetim, container, false);
recyclerView = view.findViewById(R.id.products_recylerview);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
layoutManager.setReverseLayout(true);
layoutManager.setStackFromEnd(true);
recyclerView.setLayoutManager(layoutManager);
SepetimAdapter sepetimAdapter = new SepetimAdapter(addToSepetims,getActivity());
recyclerView.setAdapter(sepetimAdapter);
return view;
}
}
I have also SepetimAdapter Class
public class SepetimAdapter extends RecyclerView.Adapter<SepetimAdapter.ViewHolder> {
ArrayList<AddToSepetim> addToSepetims = new ArrayList<AddToSepetim>();
LayoutInflater layoutInflater;
public SepetimAdapter(ArrayList<AddToSepetim> addToSepetims, Context context) {
this.addToSepetims = addToSepetims;
this.context = context;
}
Context context;
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
layoutInflater = LayoutInflater.from(context);
View view = layoutInflater.inflate(R.layout.row_product_sepetim,parent,false);
ViewHolder viewHolder = new ViewHolder(view);
return viewHolder;
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
holder.productName.setText(addToSepetims.get(position).getProductname());
holder.description.setText(addToSepetims.get(position).getDescription());
holder.imageView.setImageDrawable(context.getResources().getDrawable(addToSepetims.get(position).getImage()));
holder.button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// addToSepetims.remove(addToSepetims.get(position));
}
});
}
#Override
public int getItemCount() {
return addToSepetims.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
TextView productName,description;
ImageView imageView;
Button button;
public ViewHolder(#NonNull View itemView) {
super(itemView);
productName = itemView.findViewById(R.id.product_Name);
description = itemView.findViewById(R.id.descripton);
imageView = itemView.findViewById(R.id.product_pic);
button = itemView.findViewById(R.id.deleteFromCard);
}
}
}
Second QUESTION :
Product adapter class in onBindViewHolder class :
int c = R.drawable.iphone5;
in this line I want to get holder.imageView instead of "R.drawable.iphone5"
How can I do that ?
You can share data between fragments through a ViewModel:
Add dependency in build.gradle (Module:app) level.
implementation "androidx.lifecycle:lifecycle-viewmodel:2.2.0"
implementation "android.arch.lifecycle:runtime:2.2.0"
Create a custom ViewModel class that extends from AndroidViewModel
Here added the list you want to be shared between fragments.
public class MainViewModel extends AndroidViewModel {
private ArrayList<product_bilgileri> products;
public TempViewModel(#NonNull Application application) {
super(application);
}
public ArrayList<product_bilgileri> getProducts() {
return products;
}
public void setProducts(ArrayList<product_bilgileri> products) {
this.products = products;
}
}
Instantiate the ViewModel instance in activity/fragment
// In activity
MainViewModel mViewModel = new ViewModelProvider(this).get(MainViewModel.class);
// In fragment
MainViewModel mViewModel = new ViewModelProvider(requireActivity()).get(MainViewModel.class);
Then set the list of data with mViewModel.setProducts(myList) and retrieve it with mViewModel.getProducts()
For more info, check the documentation. Also check this article.
I want to send data from an adapter to a fragment that is already open.
In the main activity, there are two fragments already open, fragment A and fragment B. In fragment A, I have a RecyclerView and CardView placed. When one of the card views is clicked, I want to send its data to fragment B. And I get an NPE when calling mCallbacks.
if (mCallbacks != null){
mCallbacks.onItemClicked(strStockName);}
In this case, I used an interface. But I need more explanation about it.
Here is my adapter's code:
public class adapterStock extends RecyclerView.Adapter<adapterStock.ViewHolder> {
private String[] stockNameDataSet;
private Context mContext;
//==============================================
//---- interface
public interface Callbacks{
public void onItemClicked(String StockName);
}
private Callbacks mCallbacks;
//==============================================
public adapterStock(Context context, String[] DataSet){
stockNameDataSet = DataSet;
mContext = context;
}
#NonNull
#Override
public adapterStock.ViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(viewGroup.getContext());
View view = layoutInflater.inflate(R.layout.cv_stock, viewGroup, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
final String strStockName = stockNameDataSet[position];
holder.tbxStockName.setText(stockNameDataSet[position]);
holder.cardView.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View view) {
Snackbar.make(view, "Stock "+strStockName, Snackbar.LENGTH_LONG).show();
if (mCallbacks != null){
mCallbacks.onItemClicked(strStockName);
}
}
});
}
#Override
public int getItemCount() {
return stockNameDataSet.length;
}
public static class ViewHolder extends RecyclerView.ViewHolder{
public View view;
public TextView tbxStockName;
public CardView cardView;
public ViewHolder(View v){
super (v);
tbxStockName = (TextView) v.findViewById(R.id.cvTbxItemStockName);
cardView = (CardView) v.findViewById(R.id.cvStock);
}
}
public void setCallbacks(Callbacks callbacks){
this.mCallbacks = callbacks;
}
}
And here is fragment A:
public class AFrag extends Fragment implements adapterStock.Callbacks {
private String strStockName;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.frag_A, container, false);
tbxStock = (TextView) view.findViewById(R.id.tbxR);
return view;
}
#Override
public void onItemClicked(String StockName) {
Toast.makeText(getActivity(), "Stock terpilih " + StockName, Toast.LENGTH_LONG).show();
tbxStock.setText(strStockName);
}
}
Suggestions are appreciated. Thanks.
Include, setCallbacks(this) in your fragment A once adapterStock instance is created.
setCallbacks(this) in your fragment
Change this
public adapterStock(Context context, String[] DataSet){
stockNameDataSet = DataSet;
mContext = context;
}
to this
public adapterStock(Context context, String[] DataSet, Callbacks mCallbacks){
stockNameDataSet = DataSet;
mContext = context;
this.mCallbacks=mCallbacks;
}
in fragment's adapterStock instance, pass the mCallbacks as this (i.e., new adapterStock(context, dataset,this))
note: two other answers also correct
i am trying to add a recyclerview on a fragment
fragments code:
public class MediaPlayerController extends Fragment{
private static final String TAG = "MediaPlayerController";
private RecyclerView recyclerViewb;
private RecycleViewAdapter myAdapter;
private ArrayList<String> myRecordings = new ArrayList<>();
//private DBHelper dbHelper;
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
Log.d(TAG, "onCreateView: started");
View v = inflater.inflate(R.layout.media_player_area, container, false);
recyclerViewb = (RecyclerView)v.findViewById(R.id.recyclerViewXml);
//dbHelper = new DBHelper(v.getContext(), null, null, 1);
myRecordings.add("hau");
myRecordings.add("hau2");
myRecordings.add("hau3");
myRecordings.add("hau4");
myRecordings.add("ha5");
myRecordings.add("hau23");
myRecordings.add("ha31u");
myRecordings.add("haudsa");
System.out.println("what does this print?"+myRecordings);
myAdapter = new RecycleViewAdapter(v.getContext(), myRecordings);
recyclerViewb.setAdapter(myAdapter);
recyclerViewb.setLayoutManager(new LinearLayoutManager(v.getContext()));
Log.d(TAG, "onCreateView: returned");
return v;
}
in the logs i see that that it doesn't even get to the RecycleViewAdapter sections of code at all the fragment is completely blank
i get not errors as well
public class RecycleViewAdapter extends RecyclerView.Adapter<RecycleViewAdapter.ViewHolder>{
private static final String TAG = "RecycleViewAdapter";
private Context mContext;
private ArrayList<String> mRecName = new ArrayList<>();
public RecycleViewAdapter(Context mContext, ArrayList<String> mRecName) {
this.mContext = mContext;
this.mRecName = mRecName;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
Log.d(TAG, "onCreateViewHolder: i am here");
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.single_row_recycle, parent, false);
ViewHolder holder = new ViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(#NonNull final ViewHolder holder, int position) {
Log.d(TAG, "onBindViewHolder: called");
holder.recTxt.setText(mRecName.get(position).toString());
holder.parentLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(mContext, "sas gamaw", Toast.LENGTH_LONG);
}
});
}
#Override
public int getItemCount() {
return 0;
}
public class ViewHolder extends RecyclerView.ViewHolder{
RelativeLayout parentLayout;
TextView recTxt;
public ViewHolder(View itemView) {
super(itemView);
recTxt = itemView.findViewById(R.id.recTextView);
parentLayout = itemView.findViewById(R.id.parentLayoutXml);
}
}
}
in the logs it only displays oncreateView started and the myRecordings arraylist
onCreateView: started
I/System.out: what does this print?[hau, hau2, hau3, hau4, ha5,
hau23, ha31u, haudsa]
MediaPlayerController: onCreateView: returned
i can't think of what is going wrong :/ please help out
i also want to add that i am fairly new to android studio thanks
your code problem it is in Recycler Adapter in getItemCount() method,
You don't return any Item , you must change it to :
#Override
public int getItemCount() {
return mRecName.size();
}
I want to grey out fragment activity on some condition, I am trying to set a flag in pojo class and checking every time i try to grey out an activity.
I do not know where exactly the logic should be placed. I tried to put it inside a onCreateView() method, but it gave me an null pointer exception.
Please find the code below for your reference.
#SuppressLint("ValidFragment")
public class QuizTab extends Fragment {
private static final String TAG = "QuizTab";
RecyclerView recyclerView;
View view;
LinearLayout linearLayout;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
view = inflater.inflate(R.layout.quiztab, container, false);
recyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);
if(flag){
grey out logic ---- not working
}
getQuizContent();
setupRecyclerView(recyclerView);
return view;
}
private void setupRecyclerView(RecyclerView recyclerView) {
recyclerView.setLayoutManager(new LinearLayoutManager(recyclerView.getContext()));
recyclerView.setAdapter(new SimpleStringRecyclerViewAdapter(getActivity()));
}
public class SimpleStringRecyclerViewAdapter extends RecyclerView.Adapter<SimpleStringRecyclerViewAdapter.ViewHolder> {
private Context mContext;
public class ViewHolder extends RecyclerView.ViewHolder {
public final LinearLayout mLinearlayout;
public ViewHolder(View view) {
super(view);
mLinearlayout = (LinearLayout) view.findViewById(R.id.mcq);
}
}
public SimpleStringRecyclerViewAdapter(Context context) {
mContext = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.quiztab_mcq, parent, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
}
#Override
public int getItemCount() {
return 1;
}
}
}
LinearLayout in this case is parent of fragment i tryed to paint fragment but failure so i did something like that
if(flag){
LinearLayout layout = view.findViewById(R.id.parentOffragment);
layout.setBackgroundColor(Color.GRAY);
}
Im trying show a toast msg when clicked on a item from my RecycleView, Ive tried many examples,
but its not giving me anything. Can somebody give me a different example that i can follow, at the end i wanna set the onClick to show a new fragment. If I can get an example on that, it will be great.
Im using this code:
public class MovieAdapter extends RecyclerView.Adapter<MovieAdapter.ViewHolder> {
private List<Movie> movies;
private int card_layout;
private Context mContext;
public MovieAdapter(List<Movie> movies, int card_layout, Context context) {
this.movies = movies;
this.card_layout = card_layout;
this.mContext = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
final View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(card_layout, viewGroup, false);
return new ViewHolder(itemView);
}
#Override
public void onBindViewHolder(ViewHolder viewHolder, int i) {
final Movie movie = movies.get(i);
viewHolder.movieImage.setImageDrawable(mContext.getDrawable(movie.getImageResourceId(mContext)));
viewHolder.movieName.setText(movie.mName);
viewHolder.currentMovie = movie;
}
#Override
public int getItemCount(){
return movies.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView movieName;
public ImageView movieImage;
public Movie currentMovie;
public ViewHolder( View itemView) {
super(itemView);
movieName = (TextView) itemView.findViewById(R.id.movieName);
movieImage = (ImageView)itemView.findViewById(R.id.movieImage);
itemView.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View itemView){
Toast.makeText(itemView.getContext(),currentMovie.mName,Toast.LENGTH_SHORT ).show();
}
});
}
}
}
Do I have to implement something in my MainActivity as well?
and please dont get mad with me, Im just a starting with all this. All your help will be appriciated. thanks
Layout is not clickable by default. to make clickable add setClickable to true :
View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(
card_layout, viewGroup, false);
itemView.setClickable(true);
itemView.setFocusableInTouchMode(true);
After wasting an hour of time, I found the most appropriate and simplest solution to this problem:
Try this, it will definitely work.No matters whether cards are used in grids or not.
RecyclerView Adapter:
ProductCardRecyclerViewAdapter.java
public class ProductCardRecyclerViewAdapter extends RecyclerView.Adapter<ProductCardViewHolder> {
public final String TAG=getClass().getSimpleName();
Context context;
private List<ProductEntry> productList;
private Integer[] cardImages;
String[] cardTitle;
String[] cardSubtitle;
public ProductCardRecyclerViewAdapter(Context context, Integer[] imageList, String[] cardTitle, String[] cardSubtitle) {
this.cardImages = imageList;
this.cardTitle = cardTitle;
this.cardSubtitle = cardSubtitle;
this.context = context;
}
#NonNull
#Override
public ProductCardViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View layoutView = LayoutInflater.from(parent.getContext()).inflate(R.layout.product_card, parent, false);
return new ProductCardViewHolder(layoutView);
}
#Override
public void onBindViewHolder(#NonNull ProductCardViewHolder holder, int position) {
// TODO: Put Recycler ViewHolder Cards binding code here in MDC-102
holder.imgCard.setImageResource(cardImages[position]);
holder.productTitle.setText(cardTitle[position]);
holder.productPrice.setText(cardSubtitle[position]);
holder.productCard.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d(TAG, "onClick: Material Card clicked "+cardTitle[position]+" : "+context.getClass());
//TODO: Perform card clicked working
Context c = v.getContext();
Toast.makeText(c, cardTitle[position], Toast.LENGTH_SHORT).show();
}
});
}
#Override
public int getItemCount() {
return cardImages.length;
}
}
RecyclerViewHolder
ProductCardViewHolder.java
public class ProductCardViewHolder extends RecyclerView.ViewHolder {
CardView productCard;
ImageView imgCard;
public TextView productTitle;
public TextView productPrice;
public ProductCardViewHolder(#NonNull View itemView) {
super(itemView);
imgCard = itemView.findViewById(R.id.product_image);
productTitle = itemView.findViewById(R.id.product_title);
productPrice = itemView.findViewById(R.id.product_price);
productCard=itemView.findViewById(R.id.cardofproducts);
// TODO: Find and store views from itemView
}
}
Hope, it will help a lot.