I am making an Activity with 2 fragments in it to display 2 different functionalities. The problem I am having is that there is a grid view in my first fragment that is not visible. The application runs without crashing, I just have no idea why the GridView is not visible.
Here is the fragment in question:
public class PaletteFragment extends Fragment {
GridView grid;
TextView label;
public PaletteFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View palette = inflater.inflate(R.layout.fragment_palette, container, false);
label = palette.findViewById(R.id.label);
label.setText(getResources().getString(R.string.labelText));
grid = palette.findViewById(R.id.gridView);
grid.setAdapter(new CustomAdapter(palette.getContext()));
return palette;
}
}
And here is the XML for the fragment:
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".MainActivity">
<GridView
android:id="#+id/gridView"
android:layout_width="0dp"
android:layout_height="317dp"
android:visibility="visible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0"
tools:visibility="invisible" />
<TextView
android:id="#+id/label"
android:layout_width="0dp"
android:layout_height="119dp"
android:gravity="center"
android:text="#string/labelText"
android:visibility="visible"
app:layout_constraintBottom_toTopOf="#+id/gridView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0" />
</androidx.constraintlayout.widget.ConstraintLayout>
If it helps, here is the adapter I used on the GridView:
public class CustomAdapter extends BaseAdapter {
Context context;
ArrayList<Integer> colorVal = new ArrayList<Integer>();
public CustomAdapter(Context context) {
this.context = context;
}
#Override
public int getCount() {
return colorVal.size();
}
#Override
public long getItemId(int i) {
return 0;
}
#Override
public Object getItem(int i) {
return null;
}
#Override
public View getView(int i, View View, ViewGroup viewGroup) {
String[] colorName = context.getResources().getStringArray(R.array.colorName);
colorVal.add(Color.RED);
colorVal.add(Color.BLUE);
colorVal.add(Color.BLACK);
colorVal.add(Color.GREEN);
colorVal.add(Color.WHITE);
colorVal.add(Color.LTGRAY);
colorVal.add(Color.DKGRAY);
colorVal.add(Color.MAGENTA);
colorVal.add(Color.YELLOW);
colorVal.add(Color.CYAN);
TextView text = new TextView(context);
text.setText(colorName[i]);
text.setBackgroundColor(colorVal.get(i));
text.setTextSize(22);
text.setPadding(20, 20, 20, 20);
if(text.getText().toString().equals(context.getResources().getString(R.string.black))){
text.setTextColor(Color.WHITE);
}
return text;
}
}
When you call your adapter, your colorVal list is empty and hence getCount always return 0. That is why your getView fun is not getting called.
Just move your code to update the colorVal list to the constructor and you are good to go!
public CustomAdapter(Context context) {
this.context = context;
colorVal.add(Color.RED);
colorVal.add(Color.BLUE);
colorVal.add(Color.BLACK);
colorVal.add(Color.GREEN);
colorVal.add(Color.WHITE);
colorVal.add(Color.LTGRAY);
colorVal.add(Color.DKGRAY);
colorVal.add(Color.MAGENTA);
colorVal.add(Color.YELLOW);
colorVal.add(Color.CYAN);
}
You can also create this list in the fragment and send it in the adapter's constructor.
Related
I have a custom spinner with an ImageView and a TextView, however the return codes do not return either one of these values rather they return it as an object.
How do I get the drawable id or the textview string separately and not the object of the spinner?
Do I have to do it in my adapter, the spinner itself or other components trying to get the data?
Tq
Here is my Spinner XML code :
<?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:orientation="horizontal">
<ImageView
android:id="#+id/spinnerImage"
android:layout_width="40dp"
android:layout_height="40dp"
android:padding="5dp"
android:layout_weight="1"
android:src="#drawable/dark_red_square" /><!--Make sure image is present in Drawable folder-->
<TextView
android:id="#+id/spinnerText"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:layout_weight="2"
android:textSize="14sp"
android:gravity="center"
android:text="Demo"
android:textColor="#000" />
</LinearLayout>
This spinner is in a fragment. Honestly I don't know what codes should I sample here for reference, but here's the custom adapter
public class CustomAdapter extends BaseAdapter {
Context context;
int flags[];
String[] countryNames;
LayoutInflater inflter;
public CustomAdapter(Context context, int[] flags, String[] countryNames, LayoutInflater inflter) {
this.context = context;
this.flags = flags;
this.countryNames = countryNames;
this.inflter = (LayoutInflater.from(context));
}
#Override
public int getCount() {
return flags.length;
}
#Override
public Object getItem(int position) {
return countryNames[position];
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
convertView = inflter.inflate(R.layout.spinner_item, null);
TextView spinnerText= convertView.findViewById(R.id.spinnerText);
ImageView spinnerImage = convertView.findViewById(R.id.spinnerImage);
spinnerText.setText(countryNames[position]);
spinnerImage.setImageResource(flags[position]);
return convertView;
}
}
I'm developing an English-Japanese learning app, where it has a stack of cards where users can swipe through, and on each current card, the user can touch the card to flip to the other side of a card, which show the meaning of the word.
For the swipe function, I'm using a library SwipeFlingAdapterView, which support setOnItemClick. Now I need to do the flipping part. I read the tutorial here, which requires 2 fragments to do the flip:
https://developer.android.com/training/animation/cardflip.html
The structure Im setting below:
stack_of_cards_fragment.xml
<FrameLayout 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"
......
>
<com.lorentzos.flingswipe.SwipeFlingAdapterView
android:id="#+id/swipeFlingAdapterViewFront"
android:layout_width="match_parent"
android:layout_height="match_parent"
</com.lorentzos.flingswipe.SwipeFlingAdapterView>
</FrameLayout>
StackOfCardsFragment.java
public class StackOfCardsFragment extends Fragment {
ArrayList<TestModel> cardsList;
Context context;
#Override
public void onAttach(Context context) {
super.onAttach(context);
this.context = context;
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.stack_of_cards_fragment,container,false);
final CardsAdapter arrayCardsAdapter;
cardsList = new ArrayList<>();
for (int i = 0; i < 10; i++) {
//dump data
TestModel model = new TestModel();
model.isFlipped = false;
cardsList.add(model);
}
SwipeFlingAdapterView flingContainer = ButterKnife.findById(view,R.id.swipeFlingAdapterViewFront);
ButterKnife.bind(this, view);
arrayCardsAdapter = new CardsAdapter(context, cardsList);
flingContainer.setAdapter(arrayCardsAdapter);
flingContainer.setFlingListener(new SwipeFlingAdapterView.onFlingListener() {
#Override
public void removeFirstObjectInAdapter() {
Log.d("LIST", "removed object!");
if(!cardsList.isEmpty())
{arrayCardsAdapter.remove(0);}
}
#Override
public void onLeftCardExit(Object dataObject) {
Log.e("Swipe Direction","Left");
}
#Override
public void onRightCardExit(Object dataObject) {
Log.e("Swipe Direction","Right");
}
#Override
public void onAdapterAboutToEmpty(int itemsInAdapter) {
if(!cardsList.isEmpty()) {
arrayCardsAdapter.notifyDataSetChanged();
Log.d("LIST", "notified");
}else Log.e("Check Empty","Its empty");
}
#Override
public void onScroll(float scrollProgressPercent) {
Log.e("onScroll", "scrollProgressPercent");
}
});
flingContainer.setOnItemClickListener(new SwipeFlingAdapterView.OnItemClickListener() {
#Override
public void onItemClicked(int itemPosition, Object dataObject) {
//This is where I want to change the Front Card Fragment to Back Card Fragment.
}
});
return view;
}
}
and below is the part where I'm struggling to do.
flash_card_layout.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/holo_blue_dark">
<LinearLayout
android:id="#+id/child_fragment_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
</LinearLayout>
CardsAdapter.java
public class CardsAdapter extends BaseAdapter {
Context context;
ArrayList<TestModel> cardsList;
ViewFlipper viewFlipper;
public CardsAdapter(Context context, ArrayList cardsList ) {
this.context = context;
this.cardsList = cardsList;
}
#Override
public int getCount() {
return cardsList.size();
}
#Override
public Object getItem(final int i) {
return cardsList.get(i);
}
#Override
public long getItemId(int i) {
return i;
}
#Override
public View getView(final int i, View view, final ViewGroup viewGroup) {
if (view == null) {
LayoutInflater vi = (LayoutInflater) viewGroup.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = vi.inflate(R.layout.flash_card_layout, viewGroup, false);
//This is where I want to set the Front Card Fragment
Fragment frontCardFragment = new EachFrontCardFragment();
FragmentTransaction transaction = ((VocabularyGameActivity) context).getSupportFragmentManager().beginTransaction();
transaction.addToBackStack(null);
transaction.add(R.id.child_fragment_container, frontCardFragment);
transaction.commit();
}
return view;
}
public void remove(int i) {
cardsList.remove(i);
notifyDataSetChanged();
}
}
each_card_front_fragment.xml and one for the each_card_back_fragment.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/cardviewfront">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingTop="20dp"
android:paddingLeft="20dp"
android:paddingRight="20dp">
<TextView android:id="#+id/txtWord_cardfront"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="English"
android:textStyle="bold"
android:textSize="50sp"
android:textColor="#android:color/black"
android:layout_gravity="center"
android:layout_marginTop="20dp"
android:layout_marginBottom="50dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"/>
</LinearLayout>
</android.support.v7.widget.CardView>
</FrameLayout>
I already created 2 fragments for each_card_front_fragment and each_card_back_fragment.
What am I missing here? All the code above is only showing me the cardAdapter in the StackOfCardsFragment(which is only a background), but the each_card_front_fragment doesn't show up.
I already try set up a BroadcastReceiver from (CardsAdapter)BaseAdapter to send to the VocabulartyActivity to set the each_card_front_fragment there but the same outcome.
is the any other way to set the Fragment in the BaseAdapter?
I am trying to add gridview for my layout.
The MainActivity contains 5 number of tabs , where first tab is AlbumsActivity.
AlbumsActivity
public class AlbumsActivity extends Fragment{
public AlbumsActivity() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.activity_albums, container, false);
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.grid_layout);
GridView gridView = (GridView) findViewById(R.id.grid_view);
// Instance of ImageAdapter Class
gridView.setAdapter(new ImageAdapter(this));
}
}
ImageAdapter.java
I am using this class adapter to populate the grids in AlbumsActivity.
public class ImageAdapter extends BaseAdapter {
private Context mContext;
// Keep all Images in array
public Integer[] mThumbIds = {
R.drawable.splas,
R.drawable.abc,
};
// Constructor
public ImageAdapter(Context c){
mContext = c;
}
#Override
public int getCount() {
return mThumbIds.length;
}
#Override
public Object getItem(int position) {
return mThumbIds[position];
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = new ImageView(mContext);
imageView.setImageResource(mThumbIds[position]);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new GridView.LayoutParams(150, 150));
return imageView;
}
}
grid_layout.xml
<GridView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/grid_view"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:numColumns="3"
android:columnWidth="90dp"
android:horizontalSpacing="10dp"
android:verticalSpacing="10dp"
android:gravity="center"
android:stretchMode="columnWidth" >
</GridView>
activity_albums.xml
This is layout file for AlbumsActivity , where i want to show grids in page.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp"
android:orientation="vertical"
tools:context="com.example.android.musiclist.AlbumsActivity">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/ald"
android:textSize="20sp"
android:textColor="#color/colorPrimaryDark"
android:textStyle="bold"/>
</LinearLayout>
I think you are doing it wrong.
MainActivity - 5 Tabs and one framelayout
AlbumsActivity (Fragment) - Activity_Albums.xml (TextView, GridView)
ImageAdapter (BaseAdapter) - Custom Layout (ImageView)
3 -> 2 (Gridview) -> 1
if not you have to create, set parameters and inject gridview with custom layout to main layout programatically
//Try this
activity_albums.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp"
android:orientation="vertical"
tools:context="com.example.android.musiclist.AlbumsActivity">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/ald"
android:textSize="20sp"
android:textColor="#color/colorPrimaryDark"
android:textStyle="bold"/>
<FrameLayout
android:id="#+id/frameLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
AlbumsActivity
public class AlbumsActivity extends Fragment{
private View view;
private FrameLayout fl;
private GridView gv;
public AlbumsActivity() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
view = inflater.inflate(R.layout.activity_albums,container,false);
fl = view.findViewById(R.id.frameLayout);
gv = findViewById(R.id.grid_view);
gv.setAdapter(new ImageAdapter(this));
fl.addView(gv);
return view;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
}
Or Something similar, I am too lazy to type everything now. just google search "android custom arrayadapter" and you will find tons of examples. It's really simple
I want to add card style in my app like this
i use in my app mysql database so i need to make like this cards and put my data from database in it now i use ListView with this code
public void listAllItme() {
ListAdapter lA = new listAdapter(listitems);
listView.setAdapter(lA);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent open = new Intent(R_arabic.this, rewaya_show.class);
open.putExtra("name", listitems.get(position).name);
open.putExtra("url", listitems.get(position).url);
open.putExtra("img", listitems.get(position).img);
open.putExtra("num", listitems.get(position).num);
startActivity(open);
}
}
});
}
class listAdapter extends BaseAdapter {
ArrayList<listitem_gib> lista = new ArrayList<listitem_gib>();
public listAdapter(ArrayList<listitem_gib> lista) {
this.lista = lista;
}
#Override
public int getCount() {
return lista.size();
}
#Override
public Object getItem(int position) {
return lista.get(position).name;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
LayoutInflater layoutInflater = getLayoutInflater();
View view = layoutInflater.inflate(R.layout.row_item_gib, null);
TextView name = (TextView) view.findViewById(R.id.textView_gib);
ImageView img = (ImageView) view.findViewById(R.id.imageView_gib);
TextView num = (TextView) view.findViewById(R.id.textView_gib2);
TextView size = (TextView) view.findViewById(R.id.textView_gib3);
name.setText(lista.get(position).name);
num.setText(lista.get(position).num);
size.setText(lista.get(position).size);
Picasso.with(R_arabic.this).load("http://grassyhat.com/android/image/" + lista.get(position).img).into(img);
return view;
}
}
first i want to know how i can make like this card style
second how i can use this code with card menu not listview
sorry im new in android and sorry for my bad english
What do you mean by card menu? because the example in the image is a recyclerview with a cardview item, you can achieve this by doing something like this
This will be your activity
public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = (RecyclerView)findViewById(R.id.recyclerView);
//Just your list of objects, in your case the list that comes from the db
List<Items> itemsList = new ArrayList<>();
CardAdapter adapter = new CardAdapter(this, itemsList);
//RecyclerView needs a layout manager in order to display data so here we create one
StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(3, StaggeredGridLayoutManager.VERTICAL);
//Here we set the layout manager and the adapter to the listview
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(adapter);
}
Inside the layout file you just have to place the recyclerview like this
<RelativeLayout
android:id="#+id/activity_main"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="jsondh.myapplication.MainActivity">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
Then your adapter will be something like this
public class CardAdapter extends RecyclerView.Adapter<CardAdapter.CardViewHolder> {
private List<Items> itemsList;
private Activity activity;
public CardAdapter(Activity activity, List<Items> items){
this.activity = activity;
this.itemsList = items;
}
#Override
public CardViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = activity.getLayoutInflater().inflate(R.layout.cardview_layout, parent, false);
return new CardViewHolder(itemView);
}
#Override
public void onBindViewHolder(CardViewHolder holder, int position) {
//Here you bind your views with the data from each object from the list
}
#Override
public int getItemCount() {
return itemsList.size();
}
public class CardViewHolder extends RecyclerView.ViewHolder {
public ImageView bookImage;
public TextView bookLabel01, bookLabel02;
public CardViewHolder(View itemView) {
super(itemView);
bookImage = (ImageView)itemView.findViewById(R.id.image);
bookLabel01 = (TextView)itemView.findViewById(R.id.label01);
bookLabel02 = (TextView)itemView.findViewById(R.id.label02);
}
}
And the last one will be the layout from each item on the list, like this
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp">
<android.support.v7.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:cardElevation="15dp"
app:cardBackgroundColor="#3369Ed">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/image"
android:layout_width="150dp"
android:layout_height="130dp"/>
<TextView
android:id="#+id/label01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Label"
android:layout_gravity="right"
android:padding="5dp"
android:textColor="#ffffff"/>
<TextView
android:id="#+id/label02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="LongerLabel"
android:layout_gravity="right"
android:padding="5dp"
android:textColor="#ffffff"/>
</LinearLayout>
</android.support.v7.widget.CardView>
You also have to add this to your gradle file:
compile 'com.android.support:recyclerview-v7:25.0.0'
compile 'com.android.support:cardview-v7:25.0.0'
Hope it helps!
It's pretty simple. You will have to use a RecyclerView with GridLayoutManager and add a cardView to it.
Then, use an Adapter and ViewHolder to feed the data.
I suggest you to check this out:
https://developer.android.com/training/material/lists-cards.html
I am new to Android Programming and I've been trying to make a fragment which displays a list of items using RecyclerView. Everything seems fine and there is no error when I run the app.
Here is my code:
FriendsFragment.java
public class FriendsFragment extends android.support.v4.app.Fragment {
#Bind(R.id.friendList)
RecyclerView friendList;
RecyclerView.LayoutManager friendsManager;
FriendListAdapter friendListAdapter;
public FriendsFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_friends, container, false);
ButterKnife.bind(this, view);
return view;
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
friendList.setHasFixedSize(true);
friendsManager = new LinearLayoutManager(view.getContext());
friendList.setLayoutManager(friendsManager);
friendListAdapter = new FriendListAdapter(new ArrayList<Friends>());
friendList.setAdapter(friendListAdapter);
test();
friendListAdapter.notifyDataSetChanged();
friendList.setAdapter(friendListAdapter);
super.onViewCreated(view, savedInstanceState);
}
private void test() {
Friends friend = new Friends();
friend.setName("Junjie Saitamaria");
friendListAdapter.addNewFriend(friend);
}
}
FriendListAdapter.java
public class FriendListAdapter extends RecyclerView.Adapter<FriendListAdapter.ViewHolderFriend> {
private List<Friends> friendList;
public FriendListAdapter(List<Friends> friends) {
if(friends != null) {
friendList = friends;
}
}
public void addNewFriend(Friends friend) {
friendList.add(0, friend);
}
#Override
public ViewHolderFriend onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.list_item_friend, parent, false);
ViewHolderFriend viewHolder = new ViewHolderFriend(view);
return viewHolder;
}
#Override
public void onBindViewHolder(ViewHolderFriend holder, int position) {
Friends currentFriend = friendList.get(position);
holder.friendName.setText(currentFriend.getName());
}
#Override
public int getItemCount() {
return friendList.size();
}
static class ViewHolderFriend extends RecyclerView.ViewHolder {
#Bind(R.id.friend_avatar)
public ImageView friendThumbnail;
#Bind(R.id.friend_name)
public TextView friendName;
Context currentContext = null;
public ViewHolderFriend(View itemView) {
super(itemView);
ButterKnife.bind(this, itemView);
this.currentContext = itemView.getContext();
}
}
}
fragment_friends.xml
<RelativeLayout 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:layout_margin="10dp"
tools:context="com.cebuinstituteoftechnology_university.citumessenger.FriendsFragment">
<android.support.v7.widget.RecyclerView
android:id="#+id/friendList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentBottom="true" >
</android.support.v7.widget.RecyclerView>
</RelativeLayout>
list_item_friend.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="match_parent"
android:orientation="vertical">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="80dp"
android:id="#+id/friends_card"
android:elevation="2dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- icon -->
<ImageView
android:id="#+id/friend_avatar"
android:layout_width="64dp"
android:layout_height="64dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="1dp"
android:layout_marginBottom="1dp"
android:contentDescription="icon"
android:src="#drawable/avatar"
/>
<!-- title -->
<TextView
android:id="#+id/friend_name"
android:layout_width= "wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:layout_toRightOf="#+id/friend_avatar"
android:layout_alignBaseline="#+id/friend_avatar"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:text="Name" />
</RelativeLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
Looks everything fine except this extra line friendList.setAdapter(friendListAdapter); in below code:
friendList.setAdapter(friendListAdapter);
test();
friendListAdapter.notifyDataSetChanged();
friendList.setAdapter(friendListAdapter);
Replace above 3 lines with this and see :
friendList.setAdapter(friendListAdapter);
test();
friendListAdapter.notifyDataSetChanged();
Remove following line from onViewCreated() Method
friendList.setAdapter(friendListAdapter);
other code is fine.