Here is a database of my books name, I want to retrieve only those books from the database, category Islamic or fantasy And Don't show the rest of books to recycler View . any idea?
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private Context mContext;
public onlyforyouAdapter(#NonNull FirebaseRecyclerOptions<addBookSaveData> options, Context context) {
super( options );
this.mContext = context;
}
#Override
protected void onBindViewHolder(#NonNull myViewHolder holder, int position, #NonNull addBookSaveData model) {
holder.title.setText(model.getTitle() );
holder.author.setText(model.getAuthor() );
holder.description.setText( model.getDescription() );
holder.category.setText( model.getCategory() );
Glide.with( holder.imageView.getContext() ).load( model.getUri() ).into( holder.imageView );
holder.imageView.setOnClickListener( new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(v.getContext(),bookRequest.class);
intent.putExtra( "title",model.getTitle() );
intent.putExtra( "author",model.getAuthor() );
intent.putExtra( "description",model.getDescription());
intent.putExtra( "category",model.getCategory() );
intent.putExtra( "imageView",model.getUri() );
v.getContext().startActivity( intent );
}
} );
}
#Override
public int getItemCount() {
return super.getItemCount();
}
#NonNull
#Override
public myViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from( parent.getContext() ).inflate( R.layout.onlyforyourecview,parent,false );
return new myViewHolder( view );
}
class myViewHolder extends RecyclerView.ViewHolder {
ImageView imageView;
TextView title, author,description,category;
public myViewHolder(#NonNull View itemView) {
super( itemView );
imageView = itemView.findViewById( R.id.bookImg );
title = itemView.findViewById( R.id.titleNId );
author = itemView.findViewById( R.id.authorNId );
description = itemView.findViewById( R.id.descri );
category = itemView.findViewById( R.id.cate );
}
}
}
Related
How to get value from one adapter to another adapter when clicking on the favorite button then it shows how many we clicked on favorite image button and also shows all data in another activity. Below is my Adapter Class & ViewHolder class (i.e AdapterFav.java & ContactViewHolder.java)
AdapterFav.java
public class AdapterFav extends
RecyclerView.Adapter<AdapterFav.ContactViewHolder>{
private ArrayList<Contactfav> contactfavList;
private static Context mContext;
public AdapterFav(ArrayList<Contactfav> contactfavList, Context applicationContext) {
this.contactfavList = contactfavList;
this.mContext = applicationContext;
}
#Override
public ContactViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(mContext).inflate(R.layout.contact_row, null);
ContactViewHolder contactViewHolder = new ContactViewHolder(view);
return contactViewHolder;
}
#Override
public void onBindViewHolder(ContactViewHolder holder, int position) {
Contactfav contactfav = (Contactfav) contactfavList.get(position);
holder.tvContactName.setText(contactfav.getContactName());
holder.tvPhoneNumber.setText(contactfav.getContactNumber());
//Log.e("Id is", contactfav.getContactNumber());
holder.ivContactImage.setImageBitmap(contactfav.getContactImage());
holder.id=contactfav.getCid();
}
#Override
public int getItemCount() {
return contactfavList.size();
}
}
ContactViewHolder.java
public static class ContactViewHolder extends RecyclerView.ViewHolder {
ImageView ivContactImage;
ImageButton ibFavBtn;
TextView tvContactName;
TextView tvPhoneNumber;
Contactfav contactfav=new Contactfav();
String id;
public ContactViewHolder(View itemView) {
super(itemView);
ivContactImage = (ImageView) itemView.findViewById(R.id.ivContactImage);
tvContactName = (TextView) itemView.findViewById(R.id.tvContactName);
tvPhoneNumber = (TextView) itemView.findViewById(R.id.tvPhoneNumber);
ibFavBtn = (ImageButton) itemView.findViewById(R.id.fav);
ibFavBtn.setOnClickListener(new View.OnClickListener() {
Boolean b = true;
#Override
public void onClick(View view) {
if (b == true) {
ibFavBtn.setImageResource(R.drawable.star2);
Log.e("From get", id);
b = false;
} else {
ibFavBtn.setImageResource(R.drawable.star);
b = true;
}
}
});
}
}
i have a viewpager with FragmentStatePagerAdapter inside recyclerview
and its show only the first row in recyclerview
please help me
viewpager adapter:
public class CustomPagerAdapter extends FragmentStatePagerAdapter {
private static int NUM_ITEMS = 3;
public CustomPagerAdapter(FragmentManager fragmentManager) {
super(fragmentManager);
Log.e("fragmentManager",fragmentManager.toString());
}
// Returns total number of pages
#Override
public int getCount() {
return NUM_ITEMS;
}
// Returns the fragment to display for that page
#Override
public Fragment getItem(int position) {
Fragment currentFragment;
switch (position) {
case 0:
currentFragment=new FirstFragment();
break;
case 1:
currentFragment=new SecondFragment();
break;
case 2:
currentFragment=new ThirdFragment();
break;
default:
currentFragment=new FirstFragment();
break;
}
return currentFragment;
}
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
}
recyclerview adapter:
public class JobAdapter extends RecyclerView.Adapter<JobAdapter.JobHolder> {
private Context context;
private List<String> mJobList = new ArrayList<>();
public JobAdapter(List<String> mJobList,Context context) {
this.mJobList = mJobList;
this.context=context;
}
#Override
public JobHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(context);
View view = layoutInflater.inflate(R.layout.find_job_line_content, parent, false);
return new JobHolder(view);
}
#Override
public void onBindViewHolder(final JobHolder holder, int position) {
configurePagerHolder(holder, position);
}
private void configurePagerHolder(JobHolder holder, int position) {
//Job job= mJobList.get(position);
CustomPagerAdapter adapter = new CustomPagerAdapter(((MainActivity)context).getSupportFragmentManager());
holder.viewPager.setAdapter(adapter);
adapter.notifyDataSetChanged();
holder.viewPager.setCurrentItem(1);
Log.e("configurePagerHolder",position+"");
}
public int getItemCount() {``
return mJobList.size();
}
public class JobHolder extends RecyclerView.ViewHolder{
ViewPager viewPager;
public JobHolder(View itemView) {
super(itemView);
viewPager=(ViewPager)itemView.findViewById(R.id.slidesPager);
}
}
main:
public class MainActivity extends AppCompatActivity {
RecyclerView mRecyclerView;
JobAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = (RecyclerView)findViewById(R.id.find_jobs_recyclerview);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this,
LinearLayoutManager.VERTICAL,false));
mRecyclerView.setHasFixedSize(true);
List<String> list=new ArrayList<>();
list.add("1");
list.add("2");
list.add("3");
adapter = new JobAdapter(list,this);
mRecyclerView.setAdapter(adapter);
}
}
Very late answer but it might help some people...
Try using ViewPager2 ( an improved version of ViewPager) : https://developer.android.com/training/animation/screen-slide-2
In my case it solved the problem.
I have a recyclerview with 2 types of viewholders for showing 2 types of items
i want to implement on click listener on sub itmes in the items
existing solutions shows viewholder class should be implemented as static inside the adapter ,but i have declared them in sepearte file(a tutorial suggested),
So i cant implement onlick listener on the viewholders
my viewholder1 class is
public class ViewHolder1 extends RecyclerView.ViewHolder {
private TextView label1, label2;
public ImageView postImage;
public ViewHolder1(View v) {
super(v);
label1 = (TextView) v.findViewById(R.id.text11);
label2 = (TextView) v.findViewById(R.id.text22);
postImage = (ImageView) v.findViewById(R.id.dummyImage);
}
public TextView getLabel1() {
return label1;
}
public void setLabel1(TextView label1) {
this.label1 = label1;
}
public TextView getLabel2() {
return label2;
}
public void setLabel2(TextView label2) {
this.label2 = label2;
}
}
viewholder2 is
public class ViewHolder2 extends RecyclerView.ViewHolder {
private ImageView ivExample;
public ViewHolder2(View v) {
super(v);
ivExample = (ImageView) v.findViewById(R.id.ivExample);
}
public ImageView getImageView() {
return ivExample;
}
public void setImageView(ImageView ivExample) {
this.ivExample = ivExample;
}
}
adapter is
public class ComplexRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
// The items to display in your RecyclerView
private List<Object> items;
private final int USER = 0, IMAGE = 1;
// Provide a suitable constructor (depends on the kind of dataset)
public ComplexRecyclerViewAdapter(List<Object> items) {
this.items = items;
}
// Return the size of your dataset (invoked by the layout manager)
#Override
public int getItemCount() {
return this.items.size();
}
#Override
public int getItemViewType(int position) {
if (items.get(position) instanceof User) {
return USER;
} else if (items.get(position) instanceof String) {
return IMAGE;
}
return -1;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
RecyclerView.ViewHolder viewHolder;
LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());
switch (viewType) {
case USER:
View v1 = inflater.inflate(R.layout.layout_viewholder1, viewGroup, false);
viewHolder = new ViewHolder1(v1);
break;
case IMAGE:
View v2 = inflater.inflate(R.layout.layout_viewholder2, viewGroup, false);
viewHolder = new ViewHolder2(v2);
break;
default:
View v3 = inflater.inflate(R.layout.layout_viewholder2, viewGroup, false);
viewHolder = new ViewHolder2(v3);
break;
}
return viewHolder;
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, final int position) {
switch (viewHolder.getItemViewType()) {
case USER:
ViewHolder1 vh1 = (ViewHolder1) viewHolder;
configureViewHolder1(vh1, position);
break;
case IMAGE:
ViewHolder2 vh2 = (ViewHolder2) viewHolder;
configureViewHolder2(vh2);
break;
default:
ViewHolder2 vh3 = (ViewHolder2) viewHolder;
configureViewHolder2(vh3);
break;
}
}
// private void configureDefaultViewHolder(RecyclerViewSimpleTextViewHolder vh, int position) {
// vh.getLabel().setText((CharSequence) items.get(position));
// }
private void configureViewHolder1(ViewHolder1 vh1, int position) {
User user = (User) items.get(position);
if (user != null) {
vh1.getLabel1().setText(user.getMFName());
vh1.getLabel2().setText( user.getMName());
//vh1.postImage.setImageResource(R.drawable.universe);
Picasso.with(vh1.postImage.getContext())
.load(R.drawable.universe)
.resize(400,200) // resizes the image to these dimensions (in pixel)
.centerCrop()
.placeholder(R.drawable.progress_animation)
.error(R.drawable.error_image)
.into(vh1.postImage);
}
}
private void configureViewHolder2(ViewHolder2 vh2) {
// vh2.getImageView().setImageResource(R.drawable.sample_golden_gate);
Picasso.with(vh2.getImageView().getContext())
.load(R.drawable.sample_golden_gate)
.resize(400,200) // resizes the image to these dimensions (in pixel)
.centerCrop()
.placeholder(R.drawable.progress_animation)
.error(R.drawable.error_image)
.into(vh2.getImageView());
}
}
fragment that uses all
public class OneFragment extends Fragment {
private static final int VERTICAL_ITEM_SPACE = 48;
Button button;
RecyclerView rvMixed;
public OneFragment() {
// 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 rootView = inflater.inflate(R.layout.fragment_one, container, false);
// Lookup the recyclerview in activity layout
rvMixed = (RecyclerView) rootView.findViewById(R.id.rvContacts);
rvMixed.setAdapter(new ComplexRecyclerViewAdapter(getSampleArrayList()));
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity().getApplicationContext());
// Control orientation of the items
// also supports LinearLayoutManager.HORIZONTAL
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
// Optionally customize the position you want to default scroll to
layoutManager.scrollToPosition(0);
// Attach layout manager to the RecyclerView
rvMixed.setLayoutManager(layoutManager);
//adding spacing between recycler view items
// rvMixed.addItemDecoration(new VerticalSpaceItemDecoration(VERTICAL_ITEM_SPACE));
// That's all!
return rootView;
}
private void bindDataToAdapter() {
// Bind adapter to recycler view object
rvMixed = (RecyclerView) getView().findViewById(R.id.rvContacts);
ComplexRecyclerViewAdapter mAdapter = new ComplexRecyclerViewAdapter(getSampleArrayList());
rvMixed.setAdapter(mAdapter);
}
private ArrayList<Object> getSampleArrayList() {
ArrayList<Object> items = new ArrayList<>();
items.add(new User("Dany Targaryen", "Valyria"));
items.add(new User("Rob Stark", "Winterfell"));
items.add("image");
items.add(new User("Jon Snow", "Castle Black"));
items.add("image");
items.add(new User("Tyrion Lanister", "King's Landing"));
return items;
}
}
you can simply pass the click Listener on ComplexRecyclerViewAdapter through its constructor at the time of its initialization. And then you can reuse the same click listener reference for each of the ViewHolder.
Please i need help on this one. Have been working on it for days but cant figure it out.
I have a recycleView to display a list of names but its displaying empty list, but i can print the list in console.
here,s the code fetching the list
public List<BackendlessUser> userList = new ArrayList<BackendlessUser>();
BackendlessDataQuery query = new BackendlessDataQuery();
Backendless.Data.of( BackendlessUser.class ).find( query, new AsyncCallback<BackendlessCollection<BackendlessUser>>()
{
#Override
public void handleResponse( BackendlessCollection<BackendlessUser> response )
{
userList = response.getCurrentPage();
for( BackendlessUser user : userList ){
Log.d( "USERS : ", user.getEmail() );
}
Log.d("USER LIST", String.valueOf( userList.size() ));
}
#Override
public void handleFault(BackendlessFault backendlessFault) {
}
});
and the recyclerView adapter that is supposed to adapt the list to the view ..
private void setupRecyclerView(#NonNull RecyclerView recyclerView) {
recyclerView.setAdapter(new SimpleItemRecyclerViewAdapter(userList));
}
public class SimpleItemRecyclerViewAdapter
extends RecyclerView.Adapter<SimpleItemRecyclerViewAdapter.ViewHolder> {
private final List<BackendlessUser> mValues;
public SimpleItemRecyclerViewAdapter(List<BackendlessUser> items) {
mValues = items;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_list_content, parent, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(final ViewHolder holder, int position) {
holder.mItem = mValues.get(position);
holder.mIdView.setText(mValues.get(position).getProperty("idno").toString());
holder.mContentView.setText(mValues.get(position).getProperty("fname").toString());
holder.mView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (mTwoPane) {
Bundle arguments = new Bundle();
arguments.putString(ItemDetailFragment.ARG_ITEM_ID, holder.mItem.getProperty("idno").toString());
ItemDetailFragment fragment = new ItemDetailFragment();
fragment.setArguments(arguments);
getSupportFragmentManager().beginTransaction()
.replace(R.id.item_detail_container, fragment)
.commit();
} else {
Context context = v.getContext();
Intent intent = new Intent(context, ItemDetailActivity.class);
intent.putExtra(ItemDetailFragment.ARG_ITEM_ID, holder.mItem.getProperty("idno").toString());
context.startActivity(intent);
}
}
});
}
#Override
public int getItemCount() {
return mValues.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
public final View mView;
public final TextView mIdView;
public final TextView mContentView;
public BackendlessUser mItem;
public ViewHolder(View view) {
super(view);
mView = view;
mIdView = (TextView) view.findViewById(R.id.id);
mContentView = (TextView) view.findViewById(R.id.content);
}
#Override
public String toString() {
return super.toString() + " '" + mContentView.getText() + "'";
}
}
}
I Browse some Base adapter tuts and did this, I don't know how to get the contacts set to the list can any one explain what I missed
Here is the code:
class SingleRow{
String name;
String number;
int image;
SingleRow(String name,String number){
this.name = name;
this.number = number;
}
}
I used SingleRow as a inner class and here is my custom addapter
public class PranzAdapter extends BaseAdapter {
ArrayList<SingleRow> list;
Context c;
PranzAdapter(Context context){
c = context;
list = new ArrayList<SingleRow>();
String[] names = new String[]{ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME};
String[] number= new String[]{ContactsContract.CommonDataKinds.Phone.NUMBER};
for (int position=0; position<names.length; position++)
{
list.add(new SingleRow(names[position],number[position])) ;
}
}
#Override
public int getCount() {
return list.size();
}
#Override
public Object getItem(int position) {
return list.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row = inflater.inflate(R.layout.single_row,null,false);
TextView name= (TextView) row.findViewById(R.id.textView1);
TextView number = (TextView) row.findViewById(R.id.textView2);
SingleRow temp = list.get(position);
name.setText(temp.name);
number.setText(temp.number);
return row;
}
}
Main Activity
public class MainActivity extends Activity {
ListView list;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list = (ListView) findViewById(R.id.listView);
list.setAdapter(new PranzAdapter(this));
Cursor c = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,null,null,null,null);
}
}