list view cannot display

list view cannot display - android

I just tried to custom ListView (with checkbox) in android about "destination" information, it is very strange for me, because there is no error in Logcat but Listview doesnt display the items
I have searched the possible mistakes for a whole day, but I could figure out the real reason. Please help me! Thx!
here is my source :
code of ListView Adapter :
public class DestinationAdapter extends BaseAdapter {
private List<Destination> destinationList;
private static HashMap<Integer,Boolean> isSelected;
Context context;
LayoutInflater mInflater = null;
public DestinationAdapter(List<Destination> destinationList, Context context) {
super();
destinationList = new ArrayList<Destination>();
this.context = context;
this.destinationList = destinationList;
mInflater = LayoutInflater.from(context);
isSelected = new HashMap<Integer, Boolean>();
init();
}
private void init(){
for(int i=0; i< destinationList.size(); i++) {
getIsSelected().put(i,false);
}
}
#Override
public int getCount() {
return destinationList.size();
}
#Override
public Destination getItem(int position) {
return destinationList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.destination_item, null);
viewHolder = new ViewHolder();
viewHolder.destinationImage = (ImageView) convertView.findViewById
(R.id.destination_image);
viewHolder.destinationName = (TextView) convertView.findViewById
(R.id.destination_name);
viewHolder.placeSelected = (CheckBox) convertView.findViewById
(R.id.place_select);
convertView.setTag(viewHolder);
}
else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.destinationName.setText(destinationList.get(position).getName());
viewHolder.destinationImage.setImageResource(destinationList.get(position).getImageId());
viewHolder.placeSelected.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if (isSelected.get(position)) {
isSelected.put(position, false);
setIsSelected(isSelected);
} else {
isSelected.put(position, true);
setIsSelected(isSelected);
}
notifyDataSetChanged();
}
});
viewHolder.placeSelected.setChecked(getIsSelected().get(position));
return convertView;
}
public static HashMap<Integer,Boolean> getIsSelected() {
return isSelected;
}
public static void setIsSelected(HashMap<Integer,Boolean> isSelected) {
DestinationAdapter.isSelected = isSelected;
}
class ViewHolder {
ImageView destinationImage;
TextView destinationName;
CheckBox placeSelected;
}
}
and my activity(I have deleted the irrelevant parts for other display):
public class DestinationActivity extends Activity {
private ListView listView;
private List<Destination> destinationList = new ArrayList<Destination>();
private DestinationAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.destination_layout);
listView = (ListView) findViewById(R.id.list_destination);
initDestinations();
adapter = new DestinationAdapter(destinationList, DestinationActivity.this);
listView.setAdapter(adapter);
}
//初始化数据
private void initDestinations() {
Destination destination1 = new Destination("beijing", R.drawable.car);
destinationList.add(destination1);
Destination destination2 = new Destination("shanghai", R.drawable.car);
destinationList.add(destination2);
Destination destination3 = new Destination("hangzhou", R.drawable.car);
destinationList.add(destination3);
Destination destination4 = new Destination("guangzhou", R.drawable.car);
destinationList.add(destination4);
Destination destination5 = new Destination("shenzhen", R.drawable.car);
destinationList.add(destination5);
Destination destination6 = new Destination("zhuhai", R.drawable.car);
destinationList.add(destination6);
Destination destination7 = new Destination("xiamen", R.drawable.car);
destinationList.add(destination7);
Destination destination8 = new Destination("qingdao", R.drawable.car);
destinationList.add(destination8);
Destination destination9 = new Destination("jinan", R.drawable.car);
destinationList.add(destination9);
Destination destination10 = new Destination("zhengzhou", R.drawable.car);
destinationList.add(destination10);
}
}
and the Destination object:
public class Destination implements Serializable {
private int id;
private String name;
private int imageId;
private int priority;
private int rank;
// 经度
private double longitude;
// 纬度
private double latitute;
public Destination(double longitude, double latitute){
this.longitude = longitude;
this.latitute = latitute;
}
public Destination(String name, int imageId){
this.name = name;
this.imageId = imageId;
}
public Destination(int id, String name, int priority){
this.id = id;
this.name = name;
this.priority = priority;
}
public double getLongitude()
{
return longitude;
}
public void setLongitude(double longitude) {
this.longitude = longitude;
}
public double getLatitute(){
return latitute;
}
public void setLatitute(double latitute) {
this.latitute = latitute;
}
public int getId() { return id; }
public String getName() {
return name;
}
public int getImageId() { return imageId; }
public int getPriority(){ return priority; }
public int getRank() {return rank;}
public void setName(String name){
this.name = name;
}
public void setImageId(int imageId){
this.imageId = imageId;
}
public void setId(int id){ this.id = id; }
}
two layouts xml:
item_destination.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/destination_image"
android:layout_width="100dp"
android:layout_height="100dp" />
<TextView
android:id="#+id/destination_name"
android:layout_width="wrap_content"
android:layout_height="100dp"
android:layout_gravity="center"
android:layout_marginLeft="10dip" />
<CheckBox
android:id="#+id/place_select"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_alignParentRight="true"
android:layout_marginRight="10dp"
android:layout_centerVertical="true"
android:focusable="false"
android:clickable="false"
android:focusableInTouchMode="false" />
destination_layout.xml, the listview is only a part from it
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:background="#drawable/border"
android:orientation="horizontal"
android:paddingBottom="#dimen/vertical_padding"
android:paddingLeft="#dimen/horizontal_padding"
android:paddingTop="#dimen/vertical_padding" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="45dp"
android:layout_height="45dp"
android:src="#drawable/departure" />
<TextView
android:id="#+id/from_place"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1"
android:gravity="center"
android:text="From"
android:textSize="20dp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="250dp"
android:layout_gravity="top"
android:background="#drawable/border"
android:orientation="horizontal"
android:paddingBottom="#dimen/vertical_padding"
android:paddingLeft="#dimen/horizontal_padding"
android:paddingTop="#dimen/vertical_padding" >
<ImageView
android:id="#+id/imageView2"
android:layout_width="45dp"
android:layout_height="45dp"
android:src="#drawable/departure" />
<ListView
android:id="#+id/list_destination"
android:layout_marginLeft="10dp"
android:layout_width="match_parent"
android:layout_height="500dp" >
</ListView>
</LinearLayout>
Please help me! It makes me confused for a few days. thx!

Remove below line from adapter's constructor.
destinationList = new ArrayList<Destination>();
You are making new reference of list from inside of adapter.
public DestinationAdapter(List<Destination> destinationList, Context context) {
super();
// Doing this you are creating new reference of passed argument. Delete it
destinationList = new ArrayList<Destination>();
// Here you are getting empty list due to above statement
this.destinationList = destinationList;
}

Related

Android Retrofit2: How can I create expandable recycler view for categories and subcategories?

I am trying to archive this functionality for my grocery app https://imgur.com/Ugj4BIO
But I am failed to do so!
I am showing you what I am able to archive. if you have any Better Solution let me know.
Here is my Json code from which I am fetching my data from web server right now its localhost
{"cats":
[{"sub_cats":
[{
"sub_id":"1",
"sub_title":"Charger",
"sub_img":"http:\/\/localhost\/adminPohanch\/public\/img\/img23.jpg"
},
{
"sub_id":"2",
"sub_title":"Dummy",
"sub_img":"https:\/\/encrypted-tbn0.gstatic.com\/images?q=tbn:ANd9GcTrRRV2S-HAzHVIfS0EtgfIeWnej05TRN1PqWQCLW44h3NqM9UOtQ"
}
],
"id":"52",
"title":"Electric Equipments",
"img":""}],
"message":"Categories Loaded","success":1}
Here is the retofit's API abstract class's method
#GET("cats.php")
Call<Categories> getCategories();
My Categories Model Class is this
public class Categories {
#SerializedName("id")
#Expose
private String id;
#SerializedName("title")
#Expose
private String title;
#SerializedName("img")
#Expose
private String img;
#SerializedName("sub_id")
#Expose
private String sub_id;
#SerializedName("sub_title")
#Expose
private String sub_title;
#SerializedName("sub_img")
#Expose
private String sub_img;
#SerializedName("cats")
#Expose
private List<Categories> cats = null;
#SerializedName("sub_cats")
#Expose
private List<Categories> sub_cats = null;
#SerializedName("message")
#Expose
private String message;
#SerializedName("success")
#Expose
private Integer success;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getImg() {
return img;
}
public void setImg(String img) {
this.img = img;
}
public String getSub_id() {
return sub_id;
}
public void setSub_id(String sub_id) {
this.sub_id = sub_id;
}
public String getSub_title() {
return sub_title;
}
public void setSub_title(String sub_title) {
this.sub_title = sub_title;
}
public String getSub_img() {
return sub_img;
}
public void setSub_img(String sub_img) {
this.sub_img = sub_img;
}
public List<Categories> getCats() {
return cats;
}
public void setCats(List<Categories> cats) {
this.cats = cats;
}
public List<Categories> getSub_cats() {
return sub_cats;
}
public void setSub_cats(List<Categories> sub_cats) {
this.sub_cats = sub_cats;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public Integer getSuccess() {
return success;
}
public void setSuccess(Integer success) {
this.success = success;
}
}
Here is the code for my Activity
from which I am getting result/data and initializing to my Adapter
Call<Categories> callCats = RetrofitBuilder.getInstance().getApi().getCategories();
callCats.enqueue(new Callback<Categories>() {
#Override
public void onResponse(Call<Categories> call, Response<Categories> response) {
Categories cats = response.body();
Log.d("cats", "onResponse: " + cats);
if (cats != null){
List<Categories> catsList = cats.getCats();
Log.d("Categories", "onResponse: " + catsList.size());
Log.d("Categories", "onResponse: " + cats.getCats().toString());
for(int i = 0; i < catsList.size(); i++){
Categories categoriesData = new Categories();
String id = catsList.get(i).getId();
String title = catsList.get(i).getTitle();
String img = catsList.get(i).getImg();
categoriesData.setId(id);
categoriesData.setTitle(title);
categoriesData.setImg(img);
getCatItems.add(categoriesData);
List<Categories> sub = catsList.get(i).getSub_cats();
Toast.makeText(BuyerDashboard.this, ""+sub.size(), Toast.LENGTH_SHORT).show();
for (int j = 0; j < sub.size(); j++){
Categories categories = new Categories();
categories.setId(sub.get(i).getSub_id());
categories.setSub_title(sub.get(i).getSub_title());
categories.setSub_img(sub.get(i).getSub_img());
getSubItems.add(categories);
}
}
ExpandableRecyclerViewAdapter expandableCategoryRecyclerViewAdapter =
new ExpandableRecyclerViewAdapter(getApplicationContext(), getCatItems, getSubItems);
expanderRecyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
expanderRecyclerView.setAdapter(expandableCategoryRecyclerViewAdapter);
}
}
#Override
public void onFailure(Call<Categories> call, Throwable t) {
Toast.makeText(BuyerDashboard.this, t.getMessage(), Toast.LENGTH_SHORT).show();
}
});
**ExpandableRecyclerViewAdapter **
public class ExpandableRecyclerViewAdapter extends RecyclerView.Adapter<ExpandableRecyclerViewAdapter.ViewHolder> {
List<Categories> nameList ;
List<Integer> counter = new ArrayList<Integer>();
List<Categories> itemNameList;
Context context;
public ExpandableRecyclerViewAdapter(Context context,
List<Categories> nameList,
List<Categories> itemNameList ) {
this.nameList = nameList;
this.itemNameList = itemNameList;
this.context = context;
Log.d("namelist", nameList.toString());
for (int i = 0; i < nameList.size(); i++) {
counter.add(0);
}
}
#NonNull
#Override
public ExpandableRecyclerViewAdapter.ViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.cat_items, viewGroup, false);
ExpandableRecyclerViewAdapter.ViewHolder vh = new ExpandableRecyclerViewAdapter.ViewHolder(v);
return vh;
}
#Override
public void onBindViewHolder(#NonNull final ExpandableRecyclerViewAdapter.ViewHolder holder, final int position) {
Categories categories = nameList.get(position);
holder.name.setText(categories.getTitle());
InnerRecyclerViewAdapter itemInnerRecyclerView = new InnerRecyclerViewAdapter(itemNameList, context);
holder.cardRecyclerView.setLayoutManager(new GridLayoutManager(context, 2));
holder.cardView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (counter.get(position) % 2 == 0) {
holder.cardRecyclerView.setVisibility(View.VISIBLE);
} else {
holder.cardRecyclerView.setVisibility(View.GONE);
}
counter.set(position, counter.get(position) + 1);
}
});
holder.cardRecyclerView.setAdapter(itemInnerRecyclerView);
}
#Override
public int getItemCount() {
return nameList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
TextView name;
ImageButton dropBtn;
RecyclerView cardRecyclerView;
CardView cardView;
public ViewHolder(final View itemView) {
super(itemView);
name = itemView.findViewById(R.id.categoryTitle);
dropBtn = itemView.findViewById(R.id.categoryExpandBtn);
cardRecyclerView = itemView.findViewById(R.id.innerRecyclerView);
cardView = itemView.findViewById(R.id.cardView);
}
}
}
InnerRecyclerViewAdapter For Childs/(sub-categories)
public class InnerRecyclerViewAdapter extends RecyclerView.Adapter<InnerRecyclerViewAdapter.ViewHolder> {
public List<Categories> nameList;
Context context;
public InnerRecyclerViewAdapter(List<Categories> nameList, Context context) {
this.nameList = nameList;
this.context = context;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int i) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.sub_cat_items, parent, false);
InnerRecyclerViewAdapter.ViewHolder vh = new InnerRecyclerViewAdapter.ViewHolder(v);
return vh;
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, final int position) {
Categories subCategories = nameList.get(position);
holder.name.setText(subCategories.getTitle());
holder.name.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(context, ProductsActivity.class);
Categories subCategories = nameList.get(position);
i.putExtra("sub_cat_id", subCategories.getId());
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
});
}
#Override
public int getItemCount() {
return nameList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
TextView name;
public ViewHolder(View itemView) {
super(itemView);
name = itemView.findViewById(R.id.itemTextView);
}
}
}
Right now I am not displaying anything for Images I am focusing on Title of categories(parents) and sub-categories (child)
Here is my sub_cat_items file
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.CardView
android:id="#+id/cardView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<LinearLayout
android:id="#+id/linearLayoutHolder"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="10dp">
<ImageView
android:id="#+id/sub_cat_img"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_gravity="center"
android:background="#drawable/pohanch" />
<TextView
android:id="#+id/itemTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="5dp"
android:text="Fresh Fruits"
android:textAlignment="center"
android:textSize="14sp" />
</LinearLayout>
</android.support.v7.widget.CardView>
</RelativeLayout>
And the last here is my cat_items File
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animateLayoutChanges="true">
<android.support.v7.widget.CardView
android:id="#+id/cardView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="3dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/linearLayoutHolder"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="20dp">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginStart="10dp"
android:orientation="vertical">
<TextView
android:id="#+id/categoryTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Fruits & Vegetables"
android:textColor="#color/basiccolor"
android:textSize="16sp" />
<ImageButton
android:id="#+id/categoryExpandBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:background="#FFF"
android:src="#drawable/ic_arrow_downward_black_24dp" />
</RelativeLayout>
</LinearLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/innerRecyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/linearLayoutHolder"
android:background="#f6f6f6"
android:visibility="gone">
</android.support.v7.widget.RecyclerView>
</RelativeLayout>
</android.support.v7.widget.CardView>
</RelativeLayout>
I am successful in displaying Categories (parents) to the output but having issues with subcategories(children)
Here is my output
https://imgur.com/Feq6XBP

Checkout this example code for customized expandableview.
https://github.com/developernadeem/ShopGrocery

RecyclerView is for list not for ExpandableListView maybe you want to check this tutorial: https://www.androidhive.info/2013/07/android-expandable-list-view-tutorial/
Or maybe want to check this library: https://github.com/thoughtbot/expandable-recycler-view
Of course you can use RecyclerView but you have to change the layout doing your own calculations, and making the listener to make the expandable and not expandable

Retrofit returns object
Configure classes this way
public class Category{
List<Cats> cats;
private String message;
private int success;
}
Public class Cats{
List<SubCats> sub_cats;
private String id;
private String title;
private String img;
}
public class SubCats{
private String sub_id;
private String sub_title;
private String sub_img;
}
Now
#GET("cats.php")
Call<Category> getCategories();
Yo need to configure JSON as well, Remove red marked in the image. It seems unnecessary.
Reconfigure the PHP as well

RecyclerView inside RecyclerViewAdapter does not show any item?

I am trying to create recyclerview inside recyclerview which is retrieving the data from Firebase.
So far, I have two recyclerview adapters. GenreAdapter and AnimeInsideGenreAdapter classes.
I was able to show GenreAdapter data into my HomeFragment, but the AnimeInsideGenreAdapter is not showing any data and I have no idea why. I've been looking for my problem on Google but still not getting any luck.
So here are my classes and layouts:
GenreAdapter.class
public class GenreAdapter extends RecyclerView.Adapter {
private List<Genre> genreList;
private Context context;
private List<Anime> perAnimes;
private RecyclerView rvPerAnime;
private RecyclerView.Adapter adapterPerAnime;
class ViewHolder extends android.support.v7.widget.RecyclerView.ViewHolder {
FontAppCompatTextView genre_id, genre_title;
LinearLayout main;
public ViewHolder(final View itemView) {
super(itemView);
main = itemView.findViewById(R.id.main_layout);
genre_id = itemView.findViewById(R.id.genre_id);
genre_title = itemView.findViewById(R.id.genre_title);
}
}
public GenreAdapter(List<Genre> genreList, Context context) {
this.genreList = genreList;
this.context = context;
}
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new ViewHolder(LayoutInflater.from(context).inflate(R.layout.item_genre, parent, false));
}
public void onBindViewHolder(ViewHolder holder, int position) {
Genre genre = this.genreList.get(position);
holder.genre_id.setText(genre.id);
holder.genre_title.setText(genre.genre);
perAnimes = new ArrayList<>();
DatabaseReference databaseAnime = FirebaseDatabase.getInstance().getReference("anime");
Query query_anime = databaseAnime.orderByChild("genreid").equalTo(genre.id);
query_anime.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
perAnimes.clear();
if (dataSnapshot.exists()) {
for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
Anime anime = snapshot.getValue(Anime.class);
perAnimes.add(anime);
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
perAnimes.sort(new Comparator<Anime>() {
#Override
public int compare(Anime compare1, Anime compare2) {
return compare1.getTitle().compareToIgnoreCase(compare2.getTitle());
}
});
}
adapterPerAnime.notifyDataSetChanged();
} else {
perAnimes.clear();
adapterPerAnime.notifyDataSetChanged();
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
rvPerAnime = holder.itemView.findViewById(R.id.rvanime);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(context);
linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
rvPerAnime.setLayoutManager(linearLayoutManager);
rvPerAnime.setHasFixedSize(true);
adapterPerAnime = new AnimeInsideGenreAdapter(perAnimes, context);
rvPerAnime.setAdapter(adapterPerAnime);
Animation up_from_bottom = AnimationUtils.loadAnimation(context, R.anim.up_from_bottom);
holder.itemView.startAnimation(up_from_bottom);
}
public int getItemCount() {
return this.genreList.size();
}
}
item_genre.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/main_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<com.pixplicity.fontview.FontAppCompatTextView
android:id="#+id/genre_title"
style="#style/FontTextViewStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxLines="2"
android:singleLine="true"
android:text="Genre Anime"
android:textColor="#f59e24"
android:textSize="14dp"
android:textStyle="bold" />
<com.pixplicity.fontview.FontAppCompatTextView
android:id="#+id/genre_id"
style="#style/FontTextViewStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="ID Genre"
android:textColor="#7c7c7c"
android:textSize="12dp"
android:visibility="gone" />
<android.support.v7.widget.RecyclerView
android:id="#+id/rvanime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp" />
</LinearLayout>
AnimeInsideGenreAdapter.class
public class AnimeInsideGenreAdapter extends RecyclerView.Adapter<AnimeInsideGenreAdapter.ViewHolder> {
List<Anime> perAnimes;
private Context context;
private Random mRandom = new Random();
class ViewHolder extends android.support.v7.widget.RecyclerView.ViewHolder {
public FontAppCompatTextView anime_id, anime_title;
public ImageView img_anime;
public LinearLayout main;
public ViewHolder(final View itemView) {
super(itemView);
main = itemView.findViewById(R.id.main_layout);
anime_id = itemView.findViewById(R.id.anime_id);
anime_title = itemView.findViewById(R.id.anime_title);
img_anime = itemView.findViewById(R.id.img_anime);
Animation up_from_bottom = AnimationUtils.loadAnimation(itemView.getContext(), R.anim.up_from_bottom);
itemView.startAnimation(up_from_bottom);
}
}
public AnimeInsideGenreAdapter(List<Anime> perAnimes, Context context) {
this.perAnimes = perAnimes;
this.context = context;
}
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new ViewHolder(LayoutInflater.from(context).inflate(R.layout.item_anime_inside_genre, parent, false));
}
public void onBindViewHolder(final ViewHolder holder, final int position) {
final Anime perAnime = this.perAnimes.get(position);
holder.anime_id.setText(perAnime.getId());
holder.anime_title.setText(perAnime.getTitle());
Toast.makeText(context, perAnime.toString(), Toast.LENGTH_SHORT).show();
Picasso.with(context).load(perAnime.getImgcover()).fit().into(holder.img_anime);
holder.img_anime.getLayoutParams().width = getRandomIntInRange(270,200);
holder.img_anime.getLayoutParams().height = 250;
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
}
});
}
public int getItemCount() {
return this.perAnimes.size();
}
// Custom method to get a random number between a range
protected int getRandomIntInRange(int max, int min){
return mRandom.nextInt((max-min)+min)+min;
}
}
item_anime_inside_genre.xml
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="#+id/main_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true"
android:orientation="vertical"
card_view:cardCornerRadius="4dp"
card_view:cardElevation="4dp"
card_view:cardUseCompatPadding="true">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical">
<com.pixplicity.fontview.FontAppCompatTextView
android:id="#+id/anime_id"
style="#style/FontTextViewStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxLines="2"
android:singleLine="true"
android:text="Anime ID"
android:textColor="#f59e24"
android:textSize="14dp"
android:textStyle="bold" />
<ImageView
android:id="#+id/img_anime"
android:layout_width="120dp"
android:layout_height="wrap_content"
android:layout_margin="8dp"/>
<com.pixplicity.fontview.FontAppCompatTextView
android:id="#+id/anime_title"
style="#style/FontTextViewStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Anime Title"
android:textColor="#7c7c7c"
android:textSize="12dp" />
</LinearLayout>
</android.support.v7.widget.CardView>
Genre.class
public class Genre {
String id;
String genre;
public Genre() {
}
public Genre(String id, String genre) {
this.id = id;
this.genre = genre;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getGenre() {
return genre;
}
public void setGenre(String genre) {
this.genre = genre;
}}
Anime.class
public class Anime {
String id;
String genreid;
String title;
String description;
String imgcover;
public Anime() {
}
public Anime(String id, String genreid, String title, String description, String imgcover) {
this.id = id;
this.genreid = genreid;
this.title = title;
this.description = description;
this.imgcover = imgcover;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getGenreid() {
return genreid;
}
public void setGenreid(String genreid) {
this.genreid = genreid;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getImgcover() {
return imgcover;
}
public void setImgcover(String imgcover) {
this.imgcover = imgcover;
}}
I need to show the anime list from Firebase inside each genres adapter.
Any help will be much appreciated.
Thank you.

RecyclerView doesn't display any item view at load

I am retrieving JSON data and parcing it by Retrofit. I want to display it on RecyclerView but can't make it display the views. Where am I doing it wrong? Here MainActivity, Model and ListFlowerAdapter are given
public class MainActivity extends AppCompatActivity {
private ListFlowerAdapter mListFlowerAdapter;
private RecyclerView mRecyclerView;
private RetrofitClient mRetrofitClient;
LinearLayoutManager linearLayoutManager;
//private List<FlowerModel> myFlowers;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
configViews();
mRetrofitClient = new RetrofitClient();
Call<List<FlowerModel>> listCall = mRetrofitClient.getFlowerService().getAllFlowers();
listCall.enqueue(new Callback<List<FlowerModel>>() {
#Override
public void onResponse(Call<List<FlowerModel>> call, Response<List<FlowerModel>> response) {
if (response.isSuccessful()) {
List<FlowerModel> flowerList = response.body();
for (int i = 0; i < flowerList.size(); i++) {
FlowerModel flowerModel = flowerList.get(i);
mListFlowerAdapter.addFlower(flowerModel);
}
} else {
int sc = response.code();
switch (sc) {
}
}
}
#Override
public void onFailure(Call<List<FlowerModel>> call, Throwable t) {
}
});
}
private void configViews() {
mRecyclerView = findViewById(R.id.recycler_view);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setRecycledViewPool(new RecyclerView.RecycledViewPool());
linearLayoutManager = new LinearLayoutManager(this);
linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
mRecyclerView.setLayoutManager(linearLayoutManager);
mListFlowerAdapter = new ListFlowerAdapter();
mRecyclerView.setAdapter(mListFlowerAdapter);
//mRecyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext(),LinearLayoutManager.VERTICAL,false));
//mListFlowerAdapter = new ListFlowerAdapter();
// mRecyclerView.setAdapter(mListFlowerAdapter);
}
}
ListFlowerAdapter class
public class ListFlowerAdapter extends RecyclerView.Adapter<ListFlowerAdapter.MyViewHolder> {
private static final String TAG = ListFlowerAdapter.class.getSimpleName();
private Context context;
private List<FlowerModel> myFlowers;
public ListFlowerAdapter() {
myFlowers = new ArrayList<>();
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View row = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_item, null, false);
return new MyViewHolder(row);
}
#Override
public void onBindViewHolder(#NonNull MyViewHolder holder, int position) {
FlowerModel currFlower = myFlowers.get(position);
holder.mName.setText(currFlower.getName());
holder.mPrice.setText(Double.toString(currFlower.getPrice()));
Picasso.with(holder.itemView.getContext()).load("http://services.hanselandpetal.com/photos/" + currFlower.getPhoto()).into(holder.mPhoto);
}
#Override
public int getItemCount() {
return myFlowers.size();
}
public void addFlower(FlowerModel flowerModel) {
myFlowers.add(flowerModel);
notifyDataSetChanged();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
private ImageView mPhoto;
private TextView mName, mPrice;
public MyViewHolder(View itemView) {
super(itemView);
mPhoto = itemView.findViewById(R.id.flower_photo);
mName = itemView.findViewById(R.id.flower_name);
mPrice = itemView.findViewById(R.id.flower_price);
}
}
}
FlowerModel class
public class FlowerModel implements Serializable {
#Expose
private String category;
#Expose
private String price;
#Expose
private String instructions;
#Expose
private String photo;
#Expose
private String name;
#Expose
private int productId;
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public double getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
public String getInstructions() {
return instructions;
}
public void setInstructions(String instructions) {
this.instructions = instructions;
}
public String getPhoto() {
return photo;
}
public void setPhoto(String photo) {
this.photo = photo;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getProductId() {
return productId;
}
public void setProductId(int productId) {
this.productId = productId;
}
}
XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="5dp"
android:orientation="horizontal">
<ImageView
android:id="#+id/flower_photo"
android:layout_width="150dp"
android:layout_height="150dp"
android:background="#mipmap/ic_launcher"
android:scaleType="centerCrop" />
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/flower_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="#style/Base.TextAppearance.AppCompat.Large"
android:text="Large Text" />
<TextView
android:id="#+id/flower_price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="#style/Base.TextAppearance.AppCompat.Medium"
android:text="Medium Text" />
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="16dp"
tools:context=".MainActivity">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Stop Downloading" />
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="none"
android:visibility="visible" />
Could you help me with the issue, please? Thank you very much.

Don't notify your adapter recursively,
Your code :
for (int i = 0; i < flowerList.size(); i++) {
FlowerModel flowerModel = flowerList.get(i);
mListFlowerAdapter.addFlower(flowerModel); // Called from here
}
Code from adapter
public void addFlower(FlowerModel flowerModel) {
myFlowers.add(flowerModel);
notifyDataSetChanged(); // Notifying everytime
}
Instead, you should add all data to adapter and notify only once : (Updated code)
for (int i = 0; i < flowerList.size(); i++) {
FlowerModel flowerModel = flowerList.get(i);
mListFlowerAdapter.addFlower(flowerModel);
}
mListFlowerAdapter.notifyDataSetChanged(); // Notify like this
Code from adapter
public void addFlower(FlowerModel flowerModel) {
myFlowers.add(flowerModel);
//notifyDataSetChanged(); Remove from here
}

Pass activity context to the adapter and use that context for populating item on list view.
private Context mContext;
public ListFlowerAdapter(Context context) {
myFlowers = new ArrayList<>();
this.mContext = context;
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View row = LayoutInflater.from(mContext).inflate(R.layout.row_item, parent, false);
return new MyViewHolder(row);
}
From activity send the activity context for initializing the adapter like this
mListFlowerAdapter = new ListFlowerAdapter(this);
And for adding a new item
public void addFlowers(List<FlowerModel> flowerModels) {
for (int i = 0; i < flowerModels.size(); i++) {
FlowerModel flowerModel = flowerModels.get(i);
myFlowers.add(flowerModel);
}
notifyDataSetChanged();
}
And successful response just send the list for updating the adapter
List<FlowerModel> flowerList = response.body();
mListFlowerAdapter.addFlowers(flowerList);
Hope this will help.

Try to remove this line:
mRecyclerView.setHasFixedSize(true);
And add this in the XML file:
android:fillViewport="true"
Without that line, your RecyclerView content initial height is 0 (empty list), and with the fixed size it can't grow although you add items to the adapter.

RecyclerView﹕ No adapter attached; skipping layout in fragment

I have been reading the different answers here on StackOverflow and tried to implement their solutions but I am still getting the error:
RecyclerView﹕ No adapter attached; skipping layout,
So I initialize my recycler view in onCreateView in my fragment like this :
public class StatusFragment extends Fragment {
DatabaseReference databaseStatus;
ProgressDialog progressDialog;
List<ElectricityClass> list = new ArrayList<ElectricityClass>();
RecyclerView recyclerView;
RecyclerView.Adapter adapter;
public StatusFragment() {
// 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_status, container, false);
recyclerView = rootView.findViewById(R.id.recyclerView);
recyclerView.setHasFixedSize(true);
progressDialog = new ProgressDialog(getActivity());
progressDialog.setMessage("Loading Data from Firebase Database");
progressDialog.show();
databaseStatus = FirebaseDatabase.getInstance().getReference().child("Electricity");
databaseStatus.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot snapshot) {
for (DataSnapshot dataSnapshot : snapshot.getChildren()) {
ElectricityClass electricityClass = dataSnapshot.getValue(ElectricityClass.class);
list.add(electricityClass);
}
recyclerView.setLayoutManager(new LinearLayoutManager(getContext().getApplicationContext()));
adapter = new RecyclerViewAdapter(getContext().getApplicationContext(), list);
recyclerView.setAdapter(adapter);
progressDialog.dismiss();
}
#Override
public void onCancelled(DatabaseError databaseError) {
progressDialog.dismiss();
}
});
return rootView;
}
}
my RecyclerViewAdapter class :
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {
Context context;
List<ElectricityClass> dataList;
public RecyclerViewAdapter(Context context, List<ElectricityClass> list) {
this.dataList = list;
this.context = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_items, parent, false);
ViewHolder viewHolder = new ViewHolder(view);
return viewHolder;
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
ElectricityClass studentDetails = dataList.get(position);
holder.StudentNameTextView.setText(studentDetails.getName());
holder.StudentNumberTextView.setText(studentDetails.getType());
}
#Override
public int getItemCount() {
return dataList.size();
}
class ViewHolder extends RecyclerView.ViewHolder {
public TextView StudentNameTextView;
public TextView StudentNumberTextView;
public ViewHolder(View itemView) {
super(itemView);
StudentNameTextView = itemView.findViewById(R.id.ShowStudentNameTextView);
StudentNumberTextView = itemView.findViewById(R.id.ShowStudentNumberTextView);
}
}
}
My list Electricity Class :
class ElectricityClass {
private String id;
private String email;
private String name;
private String type;
private String detail;
private String location;
private String date;
private String imgurl;
public ElectricityClass() {
// Required empty public constructor
}
public ElectricityClass(String id, String currentUserString, String imageUrl, String nameString, String typeString, String detailString, String locationString, String dateString){
this.id = id;
this.email = currentUserString;
this.name =nameString;
this.type = typeString;
this.detail = detailString;
this.location = locationString;
this.date = dateString;
this.imgurl = imageUrl;
}
public String getImgurl() {
return imgurl;
}
public void setImgurl(String imgurl) {
this.imgurl = imgurl;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getDetail() {
return detail;
}
public void setDetail(String detail) {
this.detail = detail;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
}
and here is my The layout in the fragment:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/recyclerView"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
And the layout of an item:
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="#+id/cardview1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
card_view:cardElevation="5dp"
card_view:contentPadding="5dp"
card_view:cardCornerRadius="5dp"
card_view:cardMaxElevation="5dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ECEFF1"
android:padding="10dp">
<TextView
android:id="#+id/StudentName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Student Name: "
android:textColor="#000"
android:textSize="20dp" />
<TextView
android:id="#+id/ShowStudentNameTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Show Student Name"
android:textColor="#000"
android:textSize="20dp"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/StudentName"
android:layout_toEndOf="#+id/StudentName"
android:layout_marginLeft="19dp"
android:layout_marginStart="19dp" />
<TextView
android:id="#+id/StudentNumber"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Phone Number: "
android:textColor="#000"
android:textSize="20dp"
android:layout_below="#+id/StudentName"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView
android:id="#+id/ShowStudentNumberTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Show Number"
android:textColor="#000"
android:textSize="20dp"
android:layout_marginLeft="11dp"
android:layout_marginStart="11dp"
android:layout_below="#+id/ShowStudentNameTextView"
android:layout_toRightOf="#+id/StudentNumber"
android:layout_toEndOf="#+id/StudentNumber" />
</RelativeLayout>
</android.support.v7.widget.CardView>
now it shows,
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView$Adapter.notifyDataSetChanged()' on a null object reference
here I define my List2
public class StatusFragment extends Fragment {
DatabaseReference databaseStatus;
ProgressDialog progressDialog;
List<ElectricityClass> list2 = new ArrayList<ElectricityClass>();
List<ElectricityClass> list = new ArrayList<ElectricityClass>();
RecyclerView recyclerView;
RecyclerView.Adapter adapter;
and inside onDataChanged(),
public void onDataChange(DataSnapshot snapshot) {
for (DataSnapshot dataSnapshot : snapshot.getChildren()) {
ElectricityClass electricityClass = dataSnapshot.getValue(ElectricityClass.class);
list2.add(electricityClass);
}
refreshRv((ArrayList<ElectricityClass>) list2);
adapter = new RecyclerViewAdapter(getContext().getApplicationContext(), list);
recyclerView.setAdapter(adapter);
adapter.notifyDataSetChanged();
progressDialog.dismiss();
}
private void refreshRv(ArrayList<ElectricityClass> list2){
list.clear();
list.addAll(list2);
}

You are doing this wrong setting layout and adapter inside that onDataChange method. Rather create a private function that will instantiate your adapter, will set it to RecyclerView and will set layout manager too. (you may want to define the list from constructor of the adapter also like this list = new ArrayList<>(); )
When you are done with this function, call it in onCreateView method of the fragment, and inside onDataChange just call a refresh function(also private) that will clear your list(or not depending on your behaviour), add all new values and notify your adapter using adapter.notifyDataSetChanged() method.
Hope this will help you :)
EDIT: as someone mentioned in a comment, your error is just telling you that adapter is not set to RecyclerView, probably because onDataChanged() was not called. My explanation from above will solve the problem for sure
EDIT:
Define another list let's say list2, replace list.add(); with list2.add(); inside that for from onDataSetChanged();
Then after for, call this function
private void refreshRv(ArrayList<YourDataType> list2){
list.clear();
list.addAll(list2);
adapter.notifyDataSetChanged();
}

this works for me
#felicity just add this function properly
private void refreshRv(ArrayList<YourDataType> list2)
{
list.clear();
list.addAll(list2);
adapter.notifyDataSetChanged();
}
as lonut J.Bejan said

Setting text of multiple TextViews through custom adapter

I'm having trouble setting the text of multiple textviews in a custom list layout with a custom adapter. Here is my list item layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:padding="6dip" >
<ImageView
android:id="#+id/icon"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_alignParentBottom="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="5dip"
android:layout_marginRight="5dp"
android:contentDescription="TODO"
android:src="#drawable/blue_circle" />
<TextView
android:id="#+id/short_content"
android:layout_width="wrap_content"
android:layout_height="26dip"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_toRightOf="#id/icon"
android:ellipsize="marquee"
android:text="content"
android:singleLine="true"
android:textSize="12sp" />
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#id/short_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_alignWithParentIfMissing="true"
android:layout_toRightOf="#id/icon"
android:gravity="center_vertical"
android:text="Title"
android:textSize="16sp" />
<TextView
android:id="#+id/date"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="#id/short_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="#id/icon"
android:gravity="right"
android:text="date"
android:textSize="13sp" />
Here is my adapter:
public class MessageAdapter extends ArrayAdapter<TextContent> {
public MessageAdapter(Context context, int textViewResourceId){
super(context, textViewResourceId);
}
public MessageAdapter(Context context, int textViewResourceId, List<TextContent> items){
super(context, textViewResourceId, items);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if (view == null) {
LayoutInflater inflater;
inflater = LayoutInflater.from(getContext());
view = inflater.inflate(R.layout.messages_layout, null);
}
TextContent p = getItem(position);
if(p != null) {
TextView textViewShortContent = (TextView) view.findViewById(R.id.short_content);
TextView textViewTitle = (TextView) view.findViewById(R.id.title);
TextView textViewDate = (TextView) view.findViewById(R.id.date);
if (textViewShortContent != null) {
textViewShortContent.setText("Short Content");
}
if (textViewTitle != null) {
textViewTitle.setText("TITLE");
}
if (textViewDate != null) {
textViewDate.setText("DATE");
}
}
return view;
}
}
here is my textContent class:
public class TextContent implements Serializable{
private String GUID, created, modified, deleted, name, message, title, shortContent, fullContent, author, language, person;
public TextContent(){
}
public TextContent(String GUID, String created, String modified, String deleted, String name, String message, String title,
String shortContent, String fullContent, String author, String language, String person) {
this.GUID = GUID;
this.created = created;
this.modified = modified;
this.deleted = deleted;
this.name = name;
this.message = message;
this.title = title;
this.shortContent = shortContent;
this.fullContent = fullContent;
this.author = author;
this.language = language;
this.person = person;
}
public String getGUID() {
return GUID;
}
public String getCreated() {
return created;
}
public String getModified() {
return modified;
}
public String getDeleted() {
return deleted;
}
public String getName() {
return name;
}
public String getMessage() {
return message;
}
public String getTitle() {
return title;
}
public String getShortContent() {
return shortContent;
}
public String getFullContent() {
return fullContent;
}
public String getAuthor() {
return author;
}
public String getLanguage() {
return language;
}
public String getPerson() {
return person;
}
public void setGUID(String GUID) {
this.GUID = GUID;
}
public void setCreated(String created) {
this.created = created;
}
public void setModified(String modified) {
this.modified = modified;
}
public void setDeleted(String deleted) {
this.deleted = deleted;
}
public void setName(String name) {
this.name = name;
}
public void setMessage(String message) {
this.message = message;
}
public void setTitle(String title) {
this.title = title;
}
public void setShortContent(String shortContent) {
this.shortContent = shortContent;
}
public void setFullContent(String fullContent) {
this.fullContent = fullContent;
}
public void setAuthor(String author) {
this.author = author;
}
public void setLanguage(String language) {
this.language = language;
}
public void setPerson(String person) {
this.person = person;
}
}
and here is where I instantiate my adapter
listView = (ListView) getView().findViewById(R.id.list_view_messages);
MessageAdapter adapter = new MessageAdapter(context, R.layout.messages_layout, textContentList);
listView.setAdapter(adapter);
The only thing that gets displayed is the getShortContent but not getTitle or getCreated for some reason. I am 100% certain that text has been set for all fields of the textContent.

I figured it out. The textViews in my layout was overlapping so the content from the other textviews got hidden behind.

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

list view cannot display - android

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