So i have a recyclerview on my fragment in a navigation drawer and it works jus fine.
However i would like to add a second recyclerview listing more items.
This is achievable but the hard part is making the whole layout scroll together.
I have google it up an havent found anything helpful.I thought maybe one of you might have a work around.
Is this possible?
FragmentDrawer.java
public class FragmentDrawer extends Fragment {
private static String TAG = FragmentDrawer.class.getSimpleName();
private RecyclerView recyclerView;
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private NavigationDrawerAdapter adapter;
private View containerView;
private static String[] titles = null;
private FragmentDrawerListener drawerListener;
public FragmentDrawer() {
}
public void setDrawerListener(FragmentDrawerListener listener) {
this.drawerListener = listener;
}
public static List<NavDrawerItem> getData() {
List<NavDrawerItem> data = new ArrayList<>();
int[] icons = {R.drawable.home, R.drawable.ic_upcoming, R.drawable.ic_eventsaved, R.drawable.ic_wehappened, R.drawable.ic_persons};
// preparing navigation drawer items
for (int i = 0; i < titles.length && i < icons.length; i++) {
NavDrawerItem navItem = new NavDrawerItem();
navItem.setTitle(titles[i]);
navItem.setIcon(icons[i]);
data.add(navItem);
}
return data;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// drawer labels
titles = getActivity().getResources().getStringArray(R.array.nav_drawer_labels);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflating view layout
View layout = inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
recyclerView = (RecyclerView) layout.findViewById(R.id.drawerList);
adapter = new NavigationDrawerAdapter(getActivity(), getData());
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getActivity(), recyclerView, new ClickListener() {
#Override
public void onClick(View view, int position) {
drawerListener.onDrawerItemSelected(view, position);
mDrawerLayout.closeDrawer(containerView);
}
#Override
public void onLongClick(View view, int position) {
}
}));
return layout;
}
public void setUp(int fragmentId, DrawerLayout drawerLayout, final Toolbar toolbar) {
containerView = getActivity().findViewById(fragmentId);
mDrawerLayout = drawerLayout;
mDrawerToggle = new ActionBarDrawerToggle(getActivity(), drawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close) {
#Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getActivity().invalidateOptionsMenu();
}
#Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
getActivity().invalidateOptionsMenu();
}
#Override
public void onDrawerSlide(View drawerView, float slideOffset) {
super.onDrawerSlide(drawerView, slideOffset);
toolbar.setAlpha(1 - slideOffset / 2);
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerLayout.post(new Runnable() {
#Override
public void run() {
mDrawerToggle.syncState();
}
});
}
public static interface ClickListener {
public void onClick(View view, int position);
public void onLongClick(View view, int position);
}
static class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final 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) {
}
}
public interface FragmentDrawerListener {
public void onDrawerItemSelected(View view, int position);
}
NavigationDrawerAdapter.java
public class NavigationDrawerAdapter extends RecyclerView.Adapter<NavigationDrawerAdapter.MyViewHolder> {
List<NavDrawerItem> data = Collections.emptyList();
private LayoutInflater inflater;
private Context context;
public NavigationDrawerAdapter(Context context, List<NavDrawerItem> data) {
this.context = context;
inflater = LayoutInflater.from(context);
this.data = data;
}
public void delete(int position) {
data.remove(position);
notifyItemRemoved(position);
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.nav_drawer_row, parent, false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
NavDrawerItem current = data.get(position);
holder.title.setText(current.getTitle());
holder.imgViewIcon.setImageResource(current.getIcon());
}
#Override
public int getItemCount() {
return data.size();
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView title;
public ImageView imgViewIcon;
public MyViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.title);
imgViewIcon = (ImageView) itemView.findViewById(R.id.item_icon);
}
}
}
strings.xml
<resources>
<string name="nav_item_home">Home</string>
<string name="nav_item_friends">Upcoming</string>
<string name="nav_item_notifications">Saved</string>
<string name="nav_item_main">weHappened</string>
<string name="nav_item_planners">Event planners</string>
<!-- navigation drawer item labels -->
<string-array name="nav_drawer_labels">
<item>#string/nav_item_home</item>
<item>#string/nav_item_friends</item>
<item>#string/nav_item_notifications</item>
<item>#string/nav_item_main</item>
<item>#string/nav_item_planners</item>
</string-array>
<string name="title_messages">Events saved</string>
<string name="title_friends">Upcoming events</string>
<string name="title_home">Home</string>
<string name="title_happened">Events weHappened</string>
<string name="title_planners">Event planners</string>
</resources>
Use a single RecyclerView if you like to list more items in the same list. There is no point in using 2 different RecyclerViews and you can't make them scroll together if these are one below the other.
If you want to add more items to the list dynamically, build an "update" method in your Adapter and call that method when you'd like to add more items and call notifyItemRangeChanged() (or the most appropriate methods given the the RecyclerView.Adapter class)
EDIT:
Assuming you have a RecyclerView set and you know how to initialize and set it up with a basic LinearLayoutManager, I would like to focus only on the adapter.
So if you'd like to separate 2 categories like "Main options" and "Other options" you may want to consider implementing your adapter for 2 view types. Here is a short code snippet on how to achieve that but this highlights only the idea of how to use multiple view types. You may want to modify it to your needs:
public class DrawerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final int VIEW_TYPE_HEADER = 0;
private static final int VIEW_TYPE_REGULAR_ITEM = 1;
private LayoutInflater mInflater;
private List<Object> mItems;
public DrawerAdapter(Context context) {
mInflater = LayoutInflater.from(context);
mItems = new ArrayList<>();
mItems.add("Main options");
mItems.add(new Item("Option1", R.drawable.icons_for_option_1))
mItems.add(new Item("Option2", R.drawable.icons_for_option_2))
mItems.add(new Item("Option2", R.drawable.icons_for_option_2))
mItems.add(new Item("Option3", R.drawable.icons_for_option_3))
mItems.add("Secondary options")
mItems.add(new Item("Option4", R.drawable.icons_for_option_4))
// And so on...whatever the logic is.
}
#Override
public int getItemCount() {
return mItems.size();
}
#Override
public int getItemViewType(int position) {
if (position == 0 || position == 5) { // Assuming that the topmost item and the 5th item are the section headers. This if statement can be simplified too.
return VIEW_TYPE_HEADER;
} else {
return VIEW_TYPE_REGULAR_ITEM;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == VIEW_TYPE_HEADER) {
return new HeaderViewHolder(mInflater.inflate(R.layout.list_item_header, parent, false));
} else {
return new RegularItemViewHolder(mInflater.inflate(R.layout.list_item_regular, parent, false));
}
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if (holder instanceof HeaderViewHolder) {
((HeaderViewHolder) holder).setup(mItems.get(position));
} else if (holder instanceof RegularItemViewHolder) {
((RegularItemViewHolder) holder).setup(mItems.get(position));
}
}
private static class RegularItemViewHolder extends RecyclerView.ViewHolder {
private RegularItemViewHolder(View convertView) {
super(convertView);
// Initialize your views here. Let's say you will have a TextView and an icon here or whatever else.
}
public void setup(Item item) {
// Update your views here, etc.
}
}
private static class HeaderViewHolder extends RecyclerView.ViewHolder {
TextView titleTextView;
private HeaderViewHolder(View convertView) {
super(convertView);
titleTextView = convertView.findViewById(R.id.section_header);
}
public void setup(String sectionHeaderTitle) {
yourTextView.setText(title);
}
}
}
And this would be it. Sorry for eventual mistakes, I didn't test the code.
Cheers!
Related
Error on android recyclerView Adapter. App will stop working while click on RecyclerView items. I want to go other activity when click any items, when i'm using Toast it working fine but if i add Intent then it stop working.
Here is my Interface :
public interface OnItemClickListener {
void onClick(View view, int position);
}
here is my recycler Adapter calss :
public class RecAdapter extends RecyclerView.Adapter<RecAdapter.MyViewHolder> {
private List<Items> items;
private Context context;
public RecAdapter(List<Items> items, Context context )
{
this.items = items;
this.context = context;
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_item,parent,false);
return new MyViewHolder(view);
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
holder.countryname.setText(items.get(position).getCountryname());
holder.rank.setText(items.get(position).getRank());
Picasso.with(context)
.load(items.get(position).getFlag())
.into(holder.flag);
holder.setClickListener(new OnItemClickListener() {
#Override
public void onClick(View view, int position) {
Intent intent = new Intent(context , Main2Activity.class);
context.startActivity(intent);
}
});
}
#Override
public int getItemCount() {
return items.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView countryname, rank;
ImageView flag;
private OnItemClickListener clickListener;
public MyViewHolder(View itemView) {
super(itemView);
countryname = (TextView) itemView.findViewById(R.id.capital);
rank = (TextView) itemView.findViewById(R.id.rank);
flag = (ImageView) itemView.findViewById(R.id.flag);
itemView.setTag(itemView);
itemView.setOnClickListener(this);
}
public void setClickListener(OnItemClickListener itemClickListener) {
this.clickListener = itemClickListener;
}
#Override
public void onClick(View view) {
if (clickListener != null) clickListener.onClick(view, getAdapterPosition());
}
}
}
Add click listener like this:-
View itemView;
Context context;
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.card_view, parent, false);
this.context=parent.getContext();
return new ViewHolder(itemView);
}
#Override
public void onBindViewHolder(final ViewHolder holder, int position) {
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(context , Main2Activity.class);
context.startActivity(intent);
}
});
}
copying an answer of mine from a different question:
as you already know this method is no longer available in the RecyclerView class.
My approach towards implementing onClick events in a RecyclerView is something like this:
class MyAdapter extends RecyclerView.Adapter<MyViewHolder> {
interface OnClickListener {
void onClick(Item item);
}
private final List<Item> dataset;
private final OnClickListener l;
public MyAdapter(List<Item> data, OnClickListener listener) {
this.dataset = data;
this.l = listener;
}
#Override MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = //inflate layout
MyClick click = new MyClick() {
onClick(int position) {
if (l != null) {
l.onClick(dataset.get(position));
}
}
};
return new MyViewHolder(click, v);
}
static class MyViewHolder {
final MyClick l;
public MyViewHolder(MyClick listener, View view) {
super(view);
l = listener;
// inflate views
view.setOnClickListener(new OnClickListener() {
if (l != null) {
l.onClick(getAdapterPosition());
}
});
}
interface MyClick {
void onClick(int position);
}
}
}
class MyActivity extends AppCompatActivity {
#Override void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// set layout
MyAdapter adapter = new MyAdapter(getData(), new OnClickListener() {
#Override onClick(Item item) {
// do stuff with item
}
});
}
}
You can not click an holder directly..... give a id to the view then re write the code as below:
holder.(someitem).setClickListener(new OnItemClickListener() {//you need a view to execute the onclicklistener
#Override
public void onClick(View view, int position) {
Intent intent = new Intent(context , Main2Activity.class);
context.startActivity(intent);
}
});
Here is code which i create click listener for Recycler Item Click
Using this you will get two types of click
Simple Item click.
Item Long click.
Here is RecyclerItemClickListener.java File
public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
public interface OnItemClickListener
{
void onItemClick(View view, int position);
void onItemLongClick(View view, int position);
}
private OnItemClickListener mListener;
private GestureDetector mGestureDetector;
public RecyclerItemClickListener(Context context, final RecyclerView recyclerView, OnItemClickListener listener)
{
mListener = listener;
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener()
{
#Override
public boolean onSingleTapUp(MotionEvent e)
{
return true;
}
#Override
public void onLongPress(MotionEvent e)
{
View childView = recyclerView.findChildViewUnder(e.getX(), e.getY());
if(childView != null && mListener != null)
{
mListener.onItemLongClick(childView, recyclerView.getChildPosition(childView));
}
}
});
}
#Override
public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e)
{
View childView = view.findChildViewUnder(e.getX(), e.getY());
if(childView != null && mListener != null && mGestureDetector.onTouchEvent(e))
{
mListener.onItemClick(childView, view.getChildPosition(childView));
}
return false;
}
#Override
public void onTouchEvent(RecyclerView view, MotionEvent motionEvent){}
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
How to use in Activity and Fragment
rvcyclerView.addOnItemTouchListener(new RecyclerItemClickListener(context, rvcyclerView,
new RecyclerItemClickListener.OnItemClickListener() {
#Override
public void onItemClick(View view, int position) {
//do you what you want tot do simple click
}
#Override
public void onItemLongClick(View view, int position) {
//do you what you want tot do on long click
}
}));
public class RecAdapter extends RecyclerView.Adapter<RecAdapter.MyViewHolder> implements View.OnClickListener {
private List<Items> items;
private Context context;
private OnItemClickListener clickListener;
public RecAdapter(List<Items> items, Context context )
{
this.items = items;
this.context = context;
}
public void setClickListener(OnItemClickListener itemClickListener) {
this.clickListener = itemClickListener;
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_item,parent,false);
return new MyViewHolder(view);
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
holder.countryname.setText(items.get(position).getCountryname());
holder.rank.setText(items.get(position).getRank());
Picasso.with(context)
.load(items.get(position).getFlag())
.into(holder.flag);
holder.flag.setOnClickListener(this);
}
#Override
public int getItemCount() {
return items.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
TextView countryname, rank;
ImageView flag;
public MyViewHolder(View itemView) {
super(itemView);
countryname = (TextView) itemView.findViewById(R.id.capital);
rank = (TextView) itemView.findViewById(R.id.rank);
flag = (ImageView) itemView.findViewById(R.id.flag);
}
#Override
public void onClick(View view) {
if (clickListener != null) clickListener.onClick(view, getAdapterPosition());
}
}
}
On Your Activity / Fragment Implement OnItemClickListener
public class MainActivity extends AppCompatActivity implements OnItemClickListener{
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LinearLayoutManager layout = new
LinearLayoutManager(getContext(),LinearLayoutManager.VERTICAL, false);
mRecyclerView.setLayoutManager(layout );
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
RecAdapter adapter = new RecAdapter(items ,getContext());
adapter.setClickListener(this);
mRecyclerView.setAdapter(adapter );
}
#Override
public void onClick(View view, int position) {
switch(view.getId()) {
}
}
}
I have this adapter class where I have an object with a list in it.
public class ProductAdapter extends RecyclerView.Adapter<ProductAdapter.ProductViewHolder> {
private Context context;
private Shop shop;
public ProductAdapter(Context context, Shop shop) {
this.context = context;
this.shop = shop;
}
#Override
public ProductViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View v = inflater.inflate(R.layout.product_row, parent, false);
return new ProductViewHolder(v);
}
#Override
public void onBindViewHolder(ProductViewHolder holder, int position) {
holder.tvProductTitle.setText(shop.products.get(position).getTitle());
holder.tvProductDescription.setText(shop.products.get(position).getDescription());
Glide.with(context)
.load(shop.products.get(position).getImageUrl())
.placeholder(android.R.drawable.ic_menu_upload_you_tube)
.error(android.R.drawable.stat_notify_error)
.diskCacheStrategy(DiskCacheStrategy.RESULT)
.into(holder.ivProduct);
}
#Override
public int getItemCount() {
if (shop.products != null) {
return shop.products.size();
}
return 0;
}
public static class ProductViewHolder extends RecyclerView.ViewHolder {
private TextView tvProductTitle, tvProductDescription;
private ImageView ivProduct;
public ProductViewHolder(View itemView) {
super(itemView);
tvProductTitle = (TextView) itemView.findViewById(R.id.tvProductTitle);
tvProductDescription = (TextView) itemView.findViewById(R.id.tvProductDescription);
ivProduct = (ImageView) itemView.findViewById(R.id.ivProduct);
}
}
public interface ClickListener {
void onClick(View v, int position);
void onLongClick(View v, int position);
}
public static class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private ProductAdapter.ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final ProductAdapter.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.getChildAdapterPosition(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.getChildAdapterPosition(child));
}
return false;
}
#Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
I use this adapter in my fragment where I can click an item from the recyclerview which will open another activity with the selected product and it's parametars. Instead of clicking the whole item, I would like to click on part of it (lets say imageview) which will do the same as it is doing now. But, I would also like to put a checkbox in the recyclerview item itself which will have different function. At the moment, I can't use an intent in the adapter class. The way it is set up now I can only click the whole item. How can I make it work like I explained above?
public class ProductsFragment extends android.support.v4.app.Fragment {
private RecyclerView rvProduct;
private RecyclerView.LayoutManager layoutManager;
private ProductAdapter productAdapter;
public static ProductsFragment newInstance(Bundle args) {
ProductsFragment fragment = new ProductsFragment();
fragment.setArguments(args);
return fragment;
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_products, container, false);
rvProduct = (RecyclerView) v.findViewById(R.id.rvProduct);
rvProduct.setHasFixedSize(true);
layoutManager = new GridLayoutManager(getContext(), 2);
rvProduct.setLayoutManager(layoutManager);
Bundle bundle = getArguments();
final Shop shop = (Shop) bundle.getSerializable("shop");
productAdapter = new ProductAdapter(getContext(), shop);
rvProduct.setAdapter(productAdapter);
productAdapter.notifyDataSetChanged();
rvProduct.addOnItemTouchListener(new ProductAdapter.RecyclerTouchListener(getContext(), rvProduct, new ProductAdapter.ClickListener() {
#Override
public void onClick(View v, int position) {
Intent details = new Intent(getContext(), ProductDetailsActivity.class);
details.putExtra("product", shop.products.get(position));
startActivity(details);
}
#Override
public void onLongClick(View v, int position) {
}
}));
return v;
}
}
EDIT:
I've managed to do this, please tell me if this is right and efficient way:
holder.tvProductTitle.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(context, ProductDetailsActivity.class);
i.putExtra("product", shop.products.get(position));
context.startActivity(i);
}
});
The way you doing it is not correct.
As your onBindViewHolder will be called repeatedly as you scroll through the list, every time a new listener will be set.
Instead you should set the listeners in the ViewHolder class of Adapter. And use getAdapterPosition() method to get the position of item clicked.
For example:
public class ProductAdapter extends RecyclerView.Adapter<ProductAdapter.ProductViewHolder> {
private Context context; private Shop shop;
public ProductAdapter(Context context, Shop shop) {
this.context = context;
this.shop = shop;
}
#Override public ProductViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View v = inflater.inflate(R.layout.product_row, parent, false);
return new ProductViewHolder(v);
}
#Override public void onBindViewHolder(ProductViewHolder holder, int position) {
holder.tvProductTitle.setText(shop.products.get(position).getTitle());
holder.tvProductDescription.setText(shop.products.get(position).getDescription());
Glide.with(context) .load(shop.products.get(position).getImageUrl()) .placeholder(android.R.drawable.ic_menu_upload_you_tube) .error(android.R.drawable.stat_notify_error) .diskCacheStrategy(DiskCacheStrategy.RESULT) .into(holder.ivProduct);
}
#Override public int getItemCount()
{
if (shop.products != null) {
return shop.products.size();
} return 0;
}
public static class ProductViewHolder extends RecyclerView.ViewHolder {
private TextView tvProductTitle, tvProductDescription;
private ImageView ivProduct;
public ProductViewHolder(View itemView)
{
super(itemView);
tvProductTitle = (TextView) itemView.findViewById(R.id.tvProductTitle);
tvProductDescription = (TextView) itemView.findViewById(R.id.tvProductDescription);
ivProduct = (ImageView) itemView.findViewById(R.id.ivProduct);
// Set onclickListener on image
ivProduct.setOnCliCkListener(new onClickListener(){
#Override
public void onClick(View v){
Intent i = new Intent(context, ProductDetailsActivity.class);
i.putExtra("product",
shop.products.get(getAdapterPosition()));
context.startActivity(i);
}
}
}
}
public interface ClickListener {
void onClick(View v, int position);
void onLongClick(View v, int position);
}
}
You can add click listeners to each respective view of the inflated item in public onBindViewHolder. Did you consider that?
Edit: Ok it's what you did. I don't know about the efficiency though, but this is the way I would do it.
I want to set up an onClickListener within my RecyclerView adapter so I can easily refer to the other views to retrieve their tags.
Is it possible to set up an onClickListener in a RecyclerView adapter? How would I do it? Would it affect performance?
Here is my RecyclerView adapter:
public class PostRecyclerAdapter extends RecyclerView.Adapter<PostRecyclerAdapter.ViewHolder> {
private Context context;
private List<Post> mDataset;
public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnCreateContextMenuListener {
public LinearLayout mainLayout;
public TextView username;
public ImageView image;
public ViewHolder(LinearLayout view) {
super(view);
view.setOnCreateContextMenuListener(this);
mainLayout = (LinearLayout) view.findViewById(R.id.main_view);
username = (TextView) view.findViewById(R.id.username);
image = (ImageView) view.findViewById(R.id.image);
}
}
public PostRecyclerAdapter(Context context, List<Post> myDataset) {
this.context = context;
this.mDataset = myDataset;
}
#Override
public PostRecyclerAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.post_layout, parent, false);
ViewHolder vh = new ViewHolder((LinearLayout) view);
return vh;
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
Post postItem = mDataset.get(position);
holder.username.setText(postItem.getUserame());
}
#Override
public int getItemCount() {
return mDataset.size();
}
}
I would like to suggest a much simpler approach than the one given above.
in your adapter you would have written static view holder class right for that add the following code
public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
// your views declared here
CardView cardView;
public ViewHolder(View itemView) {
super(itemView);
// your view initialised here
cardView=itemView.findViewById(R.id.card_view);
cardView.setOnClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()){
case R.id.card_view:
// your logic
break;
}
}
}
by doing so you can handle individual click of your layout as well as the entire layout click
You can use GestureDetector for this. This is very simple to use :
Create A class RecyclerTouchListener :
public class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final 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.getChildAdapterPosition(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) {
}
public interface ClickListener {
void onClick(View view, int position);
void onLongClick(View view, int position);
}
}
and you can use this class as follow :
rvFilterOptions = (RecyclerView) rootView.findViewById(R.id.rvCommon);
rvFilterOptions.setHasFixedSize(true);
rvFilterOptions.addItemDecoration(new DividerItemDecoration(getActivity(),
DividerItemDecoration.VERTICAL_LIST));
LinearLayoutManager mLayoutManager = new LinearLayoutManager(getActivity());
rvFilterOptions.setLayoutManager(mLayoutManager);
rvFilterOptions.addOnItemTouchListener(new RecyclerTouchListener(getActivity(), rvFilterOptions, new RecyclerTouchListener.ClickListener() {
#Override
public void onClick(View view, int position) {
// Perform click operation and you can get post item from array using position
}
#Override
public void onLongClick(View view, int position) {
// Perform Long click operation
}
}));
Note : Concept is taken from LINK
This is simplest implementation but this will be inside recyclerviews adapter. If you want to get row item clicklistener in activity then use Interface.
public class PostRecyclerAdapter extends RecyclerView.Adapter<PostRecyclerAdapter.ViewHolder> {
private Context context;
private List<Post> mDataset;
public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnCreateContextMenuListener {
public LinearLayout mainLayout;
public TextView username;
public ImageView image;
public View mRowItem;
public ViewHolder(LinearLayout view) {
super(view);
view.setOnCreateContextMenuListener(this);
mRowItem = view;
mainLayout = (LinearLayout) view.findViewById(R.id.main_view);
username = (TextView) view.findViewById(R.id.username);
image = (ImageView) view.findViewById(R.id.image);
}
}
public PostRecyclerAdapter(Context context, List<Post> myDataset) {
this.context = context;
this.mDataset = myDataset;
}
#Override
public PostRecyclerAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.post_layout, parent, false);
ViewHolder vh = new ViewHolder((LinearLayout) view);
return vh;
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
Post postItem = mDataset.get(position);
holder.username.setText(postItem.getUserame());
//Whole row item
holder.mRowItem.setTag(position);
holder.mRowItem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int pos = (int) v.getTag();
// handle your row item click.
}
});
}
#Override
public int getItemCount() {
return mDataset.size();
}
}
I am able to change the color of the text and background of imageview of the row clicked of my recyclerview in my navigation drawer fragment.
But my problem is after clicking the 4th item,the 1st item also gets selected.Likewise after clicking my 5th item the 2nd item is selected.
Like this:
How do i solve this? So that only one item is selected at a time?
FragmentDrawer.java
public class FragmentDrawer extends Fragment {
private static String TAG = FragmentDrawer.class.getSimpleName();
private RecyclerView recyclerView;
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private NavigationDrawerAdapter adapter;
private View containerView;
private static String[] titles = null;
private FragmentDrawerListener drawerListener;
public FragmentDrawer() {
}
public void setDrawerListener(FragmentDrawerListener listener) {
this.drawerListener = listener;
}
public static List<NavDrawerItem> getData() {
List<NavDrawerItem> data = new ArrayList<>();
int[] icons = {R.drawable.ic_home,
R.drawable.ic_upcoming,
R.drawable.ic_saved,
R.drawable.ic_wehappened,
R.drawable.ic_persons,
R.drawable.ic_music,
R.drawable.ic_parties,
R.drawable.ic_art, R.drawable.ic_network, R.drawable.ic_sports};
// preparing navigation drawer items
for (int i = 0; i < titles.length && i < icons.length; i++) {
NavDrawerItem navItem = new NavDrawerItem();
navItem.setTitle(titles[i]);
navItem.setIcon(icons[i]);
data.add(navItem);
}
return data;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// drawer labels
titles = getActivity().getResources().getStringArray(R.array.nav_drawer_labels);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflating view layout
View layout = inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
recyclerView = (RecyclerView) layout.findViewById(R.id.drawerList);
adapter = new NavigationDrawerAdapter(getActivity(), getData());
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
List<SimpleSectionedRecyclerViewAdapter.Section> sections =
new ArrayList<SimpleSectionedRecyclerViewAdapter.Section>();
//Sections
sections.add(new SimpleSectionedRecyclerViewAdapter.Section(5, "Categories"));
recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getActivity(), recyclerView, new ClickListener() {
#Override
public void onClick(View view, int position) {
NavigationDrawerAdapter.selected_item = position;
recyclerView.getAdapter().notifyDataSetChanged();
drawerListener.onDrawerItemSelected(view, position);
mDrawerLayout.closeDrawer(containerView);
}
#Override
public void onLongClick(View view, int position) {
}
}));
SimpleSectionedRecyclerViewAdapter.Section[] dummy = new SimpleSectionedRecyclerViewAdapter.Section[sections.size()];
SimpleSectionedRecyclerViewAdapter mSectionedAdapter = new
SimpleSectionedRecyclerViewAdapter(getContext(), R.layout.section, R.id.section_text, adapter);
mSectionedAdapter.setSections(sections.toArray(dummy));
//Apply this adapter to the RecyclerView
recyclerView.setAdapter(mSectionedAdapter);
return layout;
}
public void setUp(int fragmentId, DrawerLayout drawerLayout, final Toolbar toolbar) {
containerView = getActivity().findViewById(fragmentId);
mDrawerLayout = drawerLayout;
mDrawerToggle = new ActionBarDrawerToggle(getActivity(), drawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close) {
#Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getActivity().invalidateOptionsMenu();
}
#Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
getActivity().invalidateOptionsMenu();
}
#Override
public void onDrawerSlide(View drawerView, float slideOffset) {
super.onDrawerSlide(drawerView, slideOffset);
toolbar.setAlpha(1 - slideOffset / 2);
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerLayout.post(new Runnable() {
#Override
public void run() {
mDrawerToggle.syncState();
}
});
}
public static interface ClickListener {
public void onClick(View view, int position);
public void onLongClick(View view, int position);
}
static class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final 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) {
}
}
public interface FragmentDrawerListener {
public void onDrawerItemSelected(View view, int position);
}
}
NavigationDrawerAdapter.java
public class NavigationDrawerAdapter extends RecyclerView.Adapter<NavigationDrawerAdapter.MyViewHolder> {
List<NavDrawerItem> data = Collections.emptyList();
private LayoutInflater inflater;
private Context context;
public static int selected_item = 0;
public NavigationDrawerAdapter(Context context, List<NavDrawerItem> data) {
this.context = context;
inflater = LayoutInflater.from(context);
this.data = data;
}
public void delete(int position) {
data.remove(position);
notifyItemRemoved(position);
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.nav_drawer_row, parent, false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
if(position == selected_item)
{
holder.title.setTextColor(Color.parseColor("#00aaff"));
holder.imgViewIcon.setBackgroundResource(R.drawable.ic_circle);
}
NavDrawerItem current = data.get(position);
holder.title.setText(current.getTitle());
holder.imgViewIcon.setImageResource(current.getIcon());
}
#Override
public int getItemCount() {
return data.size();
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView title;
public ImageView imgViewIcon;
public MyViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.title);
imgViewIcon = (ImageView) itemView.findViewById(R.id.item_icon);
}
}
}
EDIT: SimpleSectionedRecyclerViewAdapter.java
public class SimpleSectionedRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private final Context mContext;
private static final int SECTION_TYPE = 0;
private boolean mValid = true;
private int mSectionResourceId;
private int mTextResourceId;
private LayoutInflater mLayoutInflater;
private RecyclerView.Adapter mBaseAdapter;
private SparseArray<Section> mSections = new SparseArray<Section>();
public SimpleSectionedRecyclerViewAdapter(Context context, int sectionResourceId, int textResourceId,
RecyclerView.Adapter baseAdapter) {
mLayoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mSectionResourceId = sectionResourceId;
mTextResourceId = textResourceId;
mBaseAdapter = baseAdapter;
mContext = context;
mBaseAdapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
#Override
public void onChanged() {
mValid = mBaseAdapter.getItemCount()>0;
notifyDataSetChanged();
}
#Override
public void onItemRangeChanged(int positionStart, int itemCount) {
mValid = mBaseAdapter.getItemCount()>0;
notifyItemRangeChanged(positionStart, itemCount);
}
#Override
public void onItemRangeInserted(int positionStart, int itemCount) {
mValid = mBaseAdapter.getItemCount()>0;
notifyItemRangeInserted(positionStart, itemCount);
}
#Override
public void onItemRangeRemoved(int positionStart, int itemCount) {
mValid = mBaseAdapter.getItemCount()>0;
notifyItemRangeRemoved(positionStart, itemCount);
}
});
}
public static class SectionViewHolder extends RecyclerView.ViewHolder {
public TextView title;
public SectionViewHolder(View view,int mTextResourceid) {
super(view);
title = (TextView) view.findViewById(mTextResourceid);
}
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int typeView) {
if (typeView == SECTION_TYPE) {
final View view = LayoutInflater.from(mContext).inflate(mSectionResourceId, parent, false);
return new SectionViewHolder(view,mTextResourceId);
}else{
return mBaseAdapter.onCreateViewHolder(parent, typeView -1);
}
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder sectionViewHolder, int position) {
if (isSectionHeaderPosition(position)) {
((SectionViewHolder)sectionViewHolder).title.setText(mSections.get(position).title);
}else{
mBaseAdapter.onBindViewHolder(sectionViewHolder,sectionedPositionToPosition(position));
}
}
#Override
public int getItemViewType(int position) {
return isSectionHeaderPosition(position)
? SECTION_TYPE
: mBaseAdapter.getItemViewType(sectionedPositionToPosition(position)) +1 ;
}
public static class Section {
int firstPosition;
int sectionedPosition;
CharSequence title;
public Section(int firstPosition, CharSequence title) {
this.firstPosition = firstPosition;
this.title = title;
}
public CharSequence getTitle() {
return title;
}
}
public void setSections(Section[] sections) {
mSections.clear();
Arrays.sort(sections, new Comparator<Section>() {
#Override
public int compare(Section o, Section o1) {
return (o.firstPosition == o1.firstPosition)
? 0
: ((o.firstPosition < o1.firstPosition) ? -1 : 1);
}
});
int offset = 0; // offset positions for the headers we're adding
for (Section section : sections) {
section.sectionedPosition = section.firstPosition + offset;
mSections.append(section.sectionedPosition, section);
++offset;
}
notifyDataSetChanged();
}
public int positionToSectionedPosition(int position) {
int offset = 0;
for (int i = 0; i < mSections.size(); i++) {
if (mSections.valueAt(i).firstPosition > position) {
break;
}
++offset;
}
return position + offset;
}
public int sectionedPositionToPosition(int sectionedPosition) {
if (isSectionHeaderPosition(sectionedPosition)) {
return RecyclerView.NO_POSITION;
}
int offset = 0;
for (int i = 0; i < mSections.size(); i++) {
if (mSections.valueAt(i).sectionedPosition > sectionedPosition) {
break;
}
--offset;
}
return sectionedPosition + offset;
}
public boolean isSectionHeaderPosition(int position) {
return mSections.get(position) != null;
}
#Override
public long getItemId(int position) {
return isSectionHeaderPosition(position)
? Integer.MAX_VALUE - mSections.indexOfKey(position)
: mBaseAdapter.getItemId(sectionedPositionToPosition(position));
}
#Override
public int getItemCount() {
return (mValid ? mBaseAdapter.getItemCount() + mSections.size() : 0);
}
}
Change the onBindViewHolder method of your NavigationDrawerAdapter.java into this:
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
if(position == selected_item) {
holder.title.setTextColor(Color.parseColor("#00aaff"));
holder.imgViewIcon.setBackgroundResource(R.drawable.ic_circle);
} else {
holder.title.setTextColor(Color.parseColor("#00000")); //actually you should set to the normal text color
holder.imgViewIcon.setBackgroundResource(0);
}
NavDrawerItem current = data.get(position);
holder.title.setText(current.getTitle());
holder.imgViewIcon.setImageResource(current.getIcon());
}
Simple and Best
Inside Adapter class
int row_index=0;
inside onBindViewHOlder
holder.titleLL.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
row_index=position;
notifyDataSetChanged();
}
});
if (row_index==position) {
holder.title.setTextColor(Color.RED);
} else {
holder.title.setTextColor(Color.BLACK);
}
You can use class for Recycler view TouchListener
class RecyclerTouchListener implements RecyclerView.OnItemTouchListener{
private ClickListener clicklistener;
private GestureDetector gestureDetector;
public RecyclerTouchListener(Context context, final RecyclerView recycleView, final 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=recycleView.findChildViewUnder(e.getX(),e.getY());
if(child!=null && clicklistener!=null){
clicklistener.onLongClick(child,recycleView.getChildAdapterPosition(child));
}
}
});
}
#Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child=rv.findChildViewUnder(e.getX(),e.getY());
RecyclerView.ViewHolder viewHolder=rv.findContainingViewHolder(child);
if(child!=null && clicklistener!=null && gestureDetector.onTouchEvent(e)){
clicklistener.onClick(child,rv.getChildAdapterPosition(child),viewHolder);
}
return false;
}
#Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
}
Implement an Interface
public interface ClickListener{
public void onClick(View view, int position,RecyclerView.ViewHolder viewHolder);
public void onLongClick(View view, int position);
}
And in your Main Activity (Here I set Image resource You can set as You like ,Any thing)
Create an arraylist named "selected" as Integer and add following code as OnClickListener
recyclerViewSchedule.addOnItemTouchListener(new RecyclerTouchListener(this,
recyclerViewSchedule, new ClickListener() {
#Override
public void onClick(View view, final int position, RecyclerView.ViewHolder v) {
//Values are passing to activity & to fragment as well
if(!selected.contains(position))
{
selected.add(position);
((ScheduleAdapter.MyHolder) v).txtImage.setBackgroundColor(getResources().getColor(R.color.colorAccent));
}else {
((ScheduleAdapter.MyHolder) v).txtImage.setBackgroundColor(getResources().getColor(R.color.colorTransparent));
selected.remove(new Integer(position));
}
Toast.makeText(ScheduleActivity.this, "Single Click on position :"+position,
Toast.LENGTH_SHORT).show();
}
Toast.makeText(ScheduleActivity.this, "Single Click on position :"+position,
Toast.LENGTH_SHORT).show();
}
#Override
public void onLongClick(View view, int position) {
Toast.makeText(ScheduleActivity.this, "Long press on position :"+position,
Toast.LENGTH_LONG).show();
}
}));
The txtImage I specified here is from RecyclerAdapter,Replace it with Your View
Happy Coding :-)
most of the answers for such a question, are about to Override Onclick in onBindViewHolder or implementing an interface for clicking in recycler view. but as we all know, onBindViewHolder is called as your views are populated during scrolling. Thus, you will have numerous calls to setOnClickListener so it is not an efficient way and also implementing interface is not as easy as the answer I got.
here is how you can access selecting items in recycler view and change its background or do what ever you want when an item is selected .
in your ViewHolder constructor use setOnTouchListener for itemView (the argument of constructor) in this way
itemView.setOnTouchListener((v, event) -> {
if (event.getAction() == MotionEvent.ACTION_UP) {
if (v.getTag() == null) {
v.setTag(true);
v.setBackgroundColor(Color.parseColor("#F31807"));
}
else {
v.setBackgroundColor(Color.TRANSPARENT);
v.setTag(null);
}
}
if (event.getAction() == MotionEvent.ACTION_MOVE) {
//default color
v.setBackgroundColor(Color.TRANSPARENT);
}
return true;
});
We use ACTION_UP for check if user pressed the item and after that we save a boolean in view's flag so that we can press every items how many times we want and see the color is changing. ACTION_MOVE if block is for prevent selecting items when scrolling the recycler view. if you see that selecting one item is affecting another items selection, you can use this answer:
issue : RecyclerView messed up data when scrolling
in the end if you are curious about why we return true in method see this video to understand.
tutorial on OnTouchListener And Motionevent
I have tried many different approaches but in the end, the solution that worked for me is
like first I was doing this
binding.download.setOnClickListener {
binding.download.visibility = View.GONE
binding.saved.visibility = View.VISIBLE
}
this was not working for me but after the below change
Instead of changing the color or visibility in onBindViewHolder, make a function in ViewHolder class and call it from onBindViewHolder
class ViewHolder(var binding: ImageRowBinding) : RecyclerView.ViewHolder(binding.root) {
fun bind(uri: Uri, mContext: Context) {
binding.download.setOnClickListener {
binding.download.visibility = View.GONE
binding.saved.visibility = View.VISIBLE
}
}
}
and calling this bind method from onBindViewHolder like this
holder.bind(items[position].uri, mContext)
works best for me
Hi I am trying to get a switch case statement to work for the navigation drawer for an android app. I have done to an onclick event to open the one activity, no matter what fragment you want to open. I know the structure of what I have to do (get the id of the selected item and open that fragment). Could someone just tell me where be best to input the piece of could and how to start if of.
Navigation Drawer Activity:
public class NavigationDrawerFragment extends Fragment implements BCRfmAdapter.ClickListener{
private RecyclerView recyclerView;
public static final String PREF_FILE_NAME = "testpref";
public static final String KEY_USER_LEARNED_DRAWER = "user_learned_drawer";
private ActionBarDrawerToggle mDrawerToogle;
private DrawerLayout mDrawerLayout;
private boolean mUserLearnedDrawer;
private boolean mFromSavedInstanceState;
private BCRfmAdapter adapter;
private View containerView;
public NavigationDrawerFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mUserLearnedDrawer = Boolean.valueOf(readFromPreferences(getActivity(), KEY_USER_LEARNED_DRAWER, "false"));
if (savedInstanceState != null) {
mFromSavedInstanceState = true;
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
View layout = inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
recyclerView = (RecyclerView) layout.findViewById(R.id.drawerList);
adapter = new BCRfmAdapter(getActivity(), getData());
adapter.setClickListener(this);
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getActivity(), recyclerView, new ClickListener() {
#Override
public void onClick(View view, int position)
{
}
#Override
public void onLongClick(View view, int position)
{
}
}));
return layout;
}
public static List<Information> getData() {
//load only static data inside a drawer
List<Information> data = new ArrayList<>();
int[] icons = {R.drawable.ic_facebook, R.drawable.ic_facebook, R.drawable.ic_twitter, R.drawable.ic_action_about, R.drawable.ic_contact, R.drawable.ic_action_about};
String[] titles = {"Listen Live", "Facebook", "Twitter", "Google+", "About BCR FM", "Contact Us"};
for (int i = 0; i < 6; i++) {
Information current = new Information();
current.iconId = icons[i % icons.length];
current.title = titles[i % titles.length];
data.add(current);
}
return data;
//twitter://user?user_id=1721642934
//Started to add each item to the list rather than using an array..
// Add Drawer Item to dataList
/*data.add(new Information("Listen LIve", R.drawable.ic_launcher));
data.add(new Information("Facebook", R.drawable.ic_launcher));
data.add(new Information("Twitter", R.drawable.ic_launcher));
data.add(new Information("About BCRFm", R.drawable.ic_action_about));
data.add(new Information("Contact Us", R.drawable.ic_action_email));*/
}
//TODO switch case
#Override
public void itemClicked(View view, int position) {
startActivity(new Intent(getActivity(), devActivity.class));
}
public static void saveToPreferences(Context context, String preferenceName, String preferenceValue) {
SharedPreferences sharedPreferences = context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(preferenceName, preferenceValue);
editor.apply();
}
public static String readFromPreferences(Context context, String preferenceName, String defaultValue) {
SharedPreferences sharedPreferences = context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);
return sharedPreferences.getString(preferenceName, defaultValue);
}
public void setUp(int fragmentId, DrawerLayout drawerLayout, final Toolbar toolbar) {
containerView = getActivity().findViewById(fragmentId);
mDrawerLayout = drawerLayout;
mDrawerToogle = new ActionBarDrawerToggle(getActivity(), drawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close) {
#Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if (!mUserLearnedDrawer) {
mUserLearnedDrawer = true;
saveToPreferences(getActivity(), KEY_USER_LEARNED_DRAWER, mUserLearnedDrawer + "");
}
getActivity().invalidateOptionsMenu();
}
#Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
getActivity().invalidateOptionsMenu();
}
#Override
public void onDrawerSlide(View drawerView, float slideOffset) {
super.onDrawerSlide(drawerView, slideOffset);
toolbar.setAlpha(1 - slideOffset / 2);
}
};
if (!mUserLearnedDrawer && !mFromSavedInstanceState) {
mDrawerLayout.openDrawer(containerView);
}
mDrawerLayout.setDrawerListener(mDrawerToogle);
mDrawerLayout.post(new Runnable() {
#Override
public void run() {
mDrawerToogle.syncState();
}
});
}
static class RecyclerTouchListener implements RecyclerView.OnItemTouchListener{
private GestureDetector gestureDetector;
private ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final 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) { }
}
public static interface ClickListener{
public void onClick(View view, int position);
public void onLongClick(View view, int position);
}
}
And here is my DrawerAdapter code:
public class BCRfmAdapter extends RecyclerView.Adapter<BCRfmAdapter.MyViewHolder> {
List<Information> data = Collections.emptyList();
private LayoutInflater inflater;
private Context context;
private ClickListener clickListener;
public BCRfmAdapter(Context context, List<Information> data){
this.context=context;
inflater=LayoutInflater.from(context);
this.data=data;
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.custom_row, parent, false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Information current=data.get(position);
holder.title.setText(current.title);
holder.icon.setImageResource(current.iconId);
}
#Override
public int getItemCount() {return data.size();}
class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView title;
ImageView icon;
public MyViewHolder(View itemView) {
super(itemView);
itemView.setOnClickListener(this);
title = (TextView) itemView.findViewById(R.id.listText);
icon = (ImageView) itemView.findViewById(R.id.listIcon);
}
#Override
public void onClick(View v) {
context.startActivity(new Intent(context, devActivity.class));
if(clickListener != null)
{
clickListener.itemClicked(v, getPosition());
}
}
}
public interface ClickListener{
public void itemClicked(View view, int position);
}
public void setClickListener(ClickListener clickListener){
this.clickListener=clickListener;
}
}