How to Programming with Android-adapter

You are declaring your adapter twice. One at class level and another one at function level in onCreate. When you try to access it on list item click it tries to access the adapter declared at class level which was never instantiated so returning null. Change StableArrayAdapter adapterZ = new...

BaseAdapter returns wrong position on getView() method call

android,asynchronous,nullpointerexception,android-ui,android-adapter

I suspect that mItemView is the culprit here. Judging by the name, this is an instance field, so if more than one thread calls getView() in your CustomBaseAdapter, then mItemView may change which recycled view it is pointing at right under your nose. Also, I assume that getView() ends with...

Android runOnUiThread crash when pressing Back button

The best way to manage this kind of thing is through a Service. The reason is that a service can better manage background threads, even if the activity isn't running, while things like an AsyncTask will stop working when the activity is done. Take a look at this site on...

Why return false in Java?

java,android,android-studio,android-adapter

First, the lack of a visibility modifier is often referred to as package-private. It is in between protected and private on the visibility scale- only other classes within the same package can override package-private methods. See Controlling Access to members of a Class for more information. The Android framework uses...

Android - creating ListView content in AsyncTask causes random crash

android,android-listview,android-asynctask,android-adapter

Try this: If everything else has correct set up. Then this code will Show every update from your doInBackground immediatly in the listview = good user experience! private class AsyncCaller extends AsyncTask<Void,Void,Void>{ @Override protected void onPostExecute(Void result) { // TODO Auto-generated method stub super.onPostExecute(result); findViewById(R.id.progress_bar).setVisibility(View.GONE); } @Override protected Void doInBackground(Void......

Android Persistent ListView recycling

android,android-listview,android-arrayadapter,android-adapter

In getView() after setting the text update the visibility of the textview to Visible, since listitems in the ListView will get recycled. holder.tv1.setText(getItem(position)); holder.tv2.setText(getItem(position)); holder.tv1.setVisibility(View.VISIBLE); //Your code..... Updated : public class CustomAdapter extends BaseAdapter { private ArrayList list = new ArrayList(); private Context context; public CustomAdapter(Context context) { this.context =...

Android adapter getItemViewType not working properly

You have to override getViewTypeCount and return number of different view type that you have: @Override public int getViewTypeCount() { return 2; } ...

notifyDataSetChanged() doesn't work with my custom adapter

android,android-fragments,android-adapter,android-recyclerview

Your adapter has a reference to mPastEventItemList. However, you are creating a new List (a new reference) in this line of code: mPastEventItemList = PastEventItem.listAll(PastEventItem.class); but your adapter is still connected to the old reference of mPastEventItemList. So you should do something like that instead: public void refreshAdapter() { mPastEventItemList.clear();...

findViewById returns null when try to find TextView in getView [on hold]

android,android-layout,listview,android-adapter

you used viewGroup.findViewById(R.id.tvEmployeeNameSurname); but you should use like view.findViewById(R.id.tvEmployeeNameSurname);...

How to choose adapter for view pager?

android,image,android-viewpager,android-adapter

If its just images then i would suggest just a Pager Adapter as there is no need for fragments.

listview onitemclicklistener with layoutinflater

android,android-activity,android-listview,android-adapter,android-inflate

You should remove this code in CustomAdapter rowView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Toast.makeText(context, "You Clicked "+name[position], Toast.LENGTH_LONG).show(); } }); ...

Android - asynctask that fills an adapter for a listview

android,android-listview,android-asynctask,android-adapter,swiperefreshlayout

I would set the list adapter up in the onCreate() method under your list view and make this a instance variable (not a local one) so that the Async task can access it as follows i.e. @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { lv = (ListView) rootView.findViewById(android.R.id.list);...

Android ListView: Is it possible to add data to a few rows before-wards, while the rest of the ListView is loaded dynamically?

android,listview,android-listview,android-adapter,baseadapter

This sounds like a list footer, there's the possibility to add a footer view to the ListView using addFooterView. The Documentation says: public void addFooterView (View v) Add a fixed view to appear at the bottom of the list. If addFooterView is called more than once, the views will appear...

Adding a footer view in RECYCLER VIEW?

android,android-adapter,recyclerview,android-recyclerview,recycler-adapter

I created a wrapper around my adapter using this gist.And after that i can include my own layout and viewholder for my header and footer as well as the rest of the items. public class SplitMembersAdapter extends HeaderFooterRecyclerViewAdapter implements AutoCompleteContactTextView.ContactSelectListener{ private final ArrayList<SplitMember> mSplitMembersList; private final ImageLoader mImageLoader; private static...

Android textview adapter is not returning id of particular textview find with tag

java,android,textview,adapter,android-adapter

I believe that you are ... mistaking those two tags. setTag() can attach ANY object to the view, while the XML tag is only a string - I believe the findViewByTag will try to match the tag passed thru XML, not one attached through code - as it could be...

Efficiently Inflating a lot of Views within several Horizontal LinearLayout with Adapters

android,performance,android-layout,android-linearlayout,android-adapter

I have figured it out :) @TheOriginalAndroid answer is an excellent idea and response! Thank you so much for your time and help. I actually had already started implementing an AsyncTask Manager and finished it yesterday morning. I solved this by creating a class called AsycnGridManager that will manage the...

Custom Adapter throws nullpointerexception with no reason

android,listview,parse.com,android-adapter,onitemclicklistener

Exception is in this area if (v == null) { holder = new ViewHolder(); //LayoutInflater li = LayoutInflater.from(getContext()); v = li.inflate(R.layout.trans_item, parent, false); holder.txtViewAmount = (TextView) convertView.findViewById(R.id.trans_amount); holder.txtViewDate = (TextView) convertView.findViewById(R.id.trans_date); holder.txtViewTitle = (TextView) convertView.findViewById(R.id.trans_title); convertView.setTag(holder); } you must use v instaed convertView...

Android Parse.com How to obtain name from Listview click event

getClass is not what you want in your listener. I think you want to cast the item to the class Store. Instead of this -- String selectedFromList = (listView.getItemAtPosition(position).getClass().toString()); you want something like -- Store selectedStore = (Store) listView.getItemAtPosition(position); String selectedFromList = selectedStore.getName(); // Or whatever method you need ...

Use component as adapter and in adapter

android,android-fragments,android-adapter

Alright, so I have finally figured it out this problem. Firstly, I was right about Fragment: Android does not allow you to inflate it multiple times in a same layout. Then, the solution I have found is quite easy and cleaner than using BaseAdapter. I created a MyViewPattern class and...

RecyclerView - No animation on NotifyItemInsert

android,animation,listener,android-adapter,recyclerview

This is happening because LinearLayoutManager thinks the item is inserted above the first item. This behavior makes sense when you are not at the top of the list but I understand that it is unintuitive when you are at the top of the list. We may change this behavior, meanwhile,...

Keep current scroll position when update listview

android,android-listview,android-adapter,onscrolllistener

When you update your Adapter's data you can save the list current selected item index and set it back when the data is rendered. Something like this: int index = mList.getFirstVisiblePosition(); // do your update stuff mList.smoothScrollToPosition(index); ...

ListView updated from EditText

android,android-adapter,custom-lists

Well, for what we discussed, you wanted something like this: When you want to make a custom ListView, you have to write your own adapter. In this particular case I'm subclassing the BaseAdapter class. This custom adapter will take hold of my data model, and will inflate the data to...

Issues in List with one static and other dynamic items

android,list,dynamic,android-adapter,baseadapter

Create a private class inside your adapter. This class should contain all the views which your list item has. private static class ViewHolder { NetworkImageView albumImage; TextView albumName; TextView albumPhotosCount; } And then inside getView() : ViewHolder viewHolder; if (convertView == null) { viewHolder = new ViewHolder(); LayoutInflater layoutInflater =...

Spinner in ListView(android)

android,android-adapter,android-gridview,baseadapter

The spinner view does not show the view that you created in getView because you are returning convertView instead of the view you created, mViewHolder. Change return convertView; to return mViewHolder; This is a separate answer to the error you got. The error was there when you had something else...

Android GridView getChildAt(0).findViewById() returns null

You can use getItemIdAtPosition to compare the id against the id of headers. If it is not a header it should be the view containing your stuff. long id = mGridView.getItemIdAtPosition(i); if (id != StickyGridHeadersBaseAdapterWrapper.ID_HEADER) { // you now know that this item is not a header. View v =...

Android listview adapter with buttons in getView that change the layout

android,listview,android-adapter,baseadapter

In Adapter, getView() function is called many times. So when you go to find some view of carmen_grade_item inside listener it will return you object which was initiated in last (Means of it may point to same object of other row from listview). So to overcome this problem: If you...

java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive a notification - List with Universal Image Loader

android,listview,android-asynctask,android-adapter,universal-image-loader

try replacing the below line of code ((ListView) listView).setAdapter(new ImageAdapter()); with ((ListView) listView).setAdapter(mAdapter); See that for the listView you are always setting a new adapter and in your onPostExecute you are notifying to a different instance of adapter...

How to sort a listview in alphabetical order ANDROID

java,android,sorting,android-listview,android-adapter

While the first answer is the correct and most obvious way to do it, I believe an answer requires a full example: Collections.sort(apps, new Comparator<AppDetail>() { /* This comparator will sort AppDetail objects alphabetically. */ @Override public int compare(AppDetail a1, AppDetail a2) { // String implements Comparable return (a1.label.toString()).compareTo(a2.label.toString()); }...

Displaying the same image files in adapter - Android

android,android-adapter,android-gridview,android-file

Have You tried imageLoader.clearMemoryCache(); and imageLoader.clearDiscCache(); ...

NullPointerException for adapter.notifyDataSetChanged?

android,android-adapter,android-recyclerview

Looks like you never initialize the variable adapter. So it is null. That's why you get the NPE.

Changing a business object in an Adapter

android,json,android-adapter

You have two options: 1) Send updates to the rest API every time a piece of data is changed. This is really expensive and not something you want to do most likely. 2) Create a local data layer between your rest API and your listview - most likely an SQLite...

Activtiy1 to Adaper to Activity2 ，and how to use the Activity1 data in Activtiy2

android,android-activity,android-adapter

Options: When creating an intent, put the data in a bundle http://developer.android.com/reference/android/os/Bundle.html, and add it to the intent. Take a look at the singleton design pattern. Create the object in one activity and it will be accessibly to the other activity. If all your data are primitive types, you can...

Android: On click in adapter give wrong position

android,android-listview,listener,android-adapter,android-adapterview

Add tag to imageview like below : holder.image1 = (ImageView) view.findViewById(R.id.imageView1); holder.image2 = (ImageView) view.findViewById(R.id.imageView2); holder.image3 = (ImageView) view.findViewById(R.id.imageView3); holder.image4 = (ImageView) view.findViewById(R.id.imageView4); holder.image1.setTag(position); holder.image1.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // Also having Async task Integer index = (Integer) v.getTag(); } }); ...

Popup Menu in custom ListView

android,android-spinner,android-adapter,android-theme,appcompat

I finally found the solution to my problem, eventhough I have no explanation why this solution works. With the following import I always had the error: import android.support.v7.widget.PopupMenu; It works fine with the following import: import android.widget.PopupMenu; I tested the code provided by Ric (Thanks for the great help!) and...

Resources$NotFoundException for AppCompat in Android?

R.style.Widget_AppCompat_Light_DropDownItem_Spinner is not a layout, it needs the ID for a layout file like the first you used or like support_simple_spinner_dropdown_item.xml available in AppCompat.

ListView with custom adapter: some items are hidden

android,android-layout,android-listview,android-adapter

debug the int returned by getImageId(m_context, "c" + m_list.get(position).name.toLowerCase() It is probably returning 0 or -1 which does not set images in your imageview and the view is collapsed!...

Best way to update data with a RecyclerView adapter

android,android-adapter,recyclerview

RecyclerView's Adapter doesn't come with many methods otherwise available in ListView's adapter. But your swap can be implemented quite simply as: class MyRecyclerAdapter{ List<Data> data; ... public void swap(ArrayList<Data> datas){ data.clear(); data.addAll(datas); notifyDataSetChanged(); } } Also there is a difference between list.clear(); list.add(data); and list = newList; The first is...

Custom Adapter with ListView

android,android-layout,android-listview,android-adapter

The inflate method is overloaded, and the two-parameter version you used in this line: headerView = mInflater.inflate(R.layout.header_list_item, parent); actually tries to add the inflated view to the AdapterView named parent (which is what caused the original UnsupportedOperationException). If you look at the source code for the LayoutInflater class (lines 364-366):...

I have error when use context in adapter, i would like use startActivityForResult(…) in adapter, how should I do?

android,android-intent,android-activity,android-adapter,android-context

You're getting an error on the mActivity = (Activity)mContext; line because the Context you're instantiating the Adapter with is not an Activity. Change the Adapter instantiation as follows: mAdapter = new MyAdapter(this, TITLES, ICONS, NAME, EMAIL, PROFILE); ...

Having difficulty controlling webview from other activities/classes

java,android,android-webview,android-adapter,recyclerview

Fragment should be sufficient: public class WebViewFragment extends Fragment { public static final String TAG = WebViewFragment.class.getName(); public WebView mWebView; ... public void updateWebView(String url) { mWebView.loadUrl(url); } } You can always find Fragments by tag (or id): get[Support]FragmentManager().findFragmentById(int id); get[Support]FragmentManager().findFragmentByTag(String tag); and invoke methods: WebViewFragment webViewFragment = (WebViewFragment) get[Support]FragmentManager().findFragmentByTag(WebViewFragment.TAG);...

Best way to save a arraylist

java,android,arraylist,sharedpreferences,android-adapter

If you need saving your list when activity is paused, you have several ways to do it. First you need define the private list field in your activity. private ArrayList<AppDetail> allowedApps; 1) Make AppDetail serializable and use onSaveInstanceState public class AppDetail implements Serializable { CharSequence label; CharSequence name; Drawable icon;...

Volley Plus OutOfMemoryError in List Adapter

android,json,android-listview,android-adapter,android-volley

Here is the solution for this Problem with changes in Adapter class. In which i placed DiskLruBasedCache.ImageCacheParams cacheParams = new DiskLruBasedCache.ImageCacheParams(mContext, "CacheDirectory"); cacheParams.setMemCacheSizePercent(0.5f); SimpleImageLoader mImageFetcher = new SimpleImageLoader(mContext, null, cacheParams); Inside if (rowView == null) which prevents to use above code repetitively in Adabpter Class....

Get selected items from listview using custom adapter on submit button pressed in Android

android,listview,android-listview,android-adapter,android-switch

Error:(82, 37) error: variable adapter might not have been initialized This is indeed the case - adapter had been declared just above and not initialised, so would be null anyway if the compiler hadn't got there first. Your second method seems, at a quick glance, much more likely to...

Switch in adapter for a ListView

Solved. The problem with the OnCheckedChangeListener() is that it executes the method every single time you execute getView(). How did I solve it? Easy: I just used an onClickListener(), and the code is executed only when I click in the Switch. Now this is the result: viewHolder.isChecked1 = viewHolder.UnSwitch.isChecked(); map.put(position,...

Null Pointer Exception when trying to populate a list view with a custom adapter

java,android,android-adapter,retrofit

Comment I think you need to call this code: ListView list = (ListView) findViewById(R.id.restaurantListView); list.setAdapter(adapter); in your onActivityCreated() method for a fragment or on your onCreate() method for an Activtiy, after you have called your layout.xml file....

Is making network call safe in ArrayAdapter?

Can you please elaborate what actually happens during a network call when I rotate the device? Will this call be lost, and then recreated because letters are present in autotextview? I have not worked with Google Places API but I think this may help you: when you rotate your...

Getting different integer value from resource folder in Android

android,android-adapter,android-resources

The device density is 165dpi thats make it mdpi device. The resolution is 320px x 480px and because its mdpi thats mean. The device is 320dp x 480dp. And from Google doc you can see this device is Normal. xlarge screens are at least 960dp x 720dp large screens are...

ClassCastException when using adapter with two view types

android,android-adapter

You did not override getViewTypeCount. You need to add @Override public int getViewTypeCount() { return 2; } in the FriendsListAdapterFromKesh class, so that your custom adapter knows how many different kinds of view to expect. Since you haven't overridden getViewTypeCount, your adapter is probably not even checking the value returned...

Getting android Sqlite syntax error running in api 14

android,android-activity,android-sqlite,android-adapter,simplecursoradapter

As per this post multi-values syntax was introduced in SQLite version 3.7.11: "Enhance the INSERT syntax to allow multiple rows to be inserted via the VALUES clause. ". SQLite version 3.7.11 is only in Android 4.1 and up. SQLite version 3.7.11 available with API levels: 19, 18, 17, 16 SQLite...

failed to call Adapter method from fragment

java,android,listview,android-fragments,android-adapter

Shouldn't it be something like Adapter adapter=new Adapter(getActivity(),list,addedTask); adapter.getcount(); where list is an object of type List<Reminder_Database>. To get value from AddedTask to AddTask: public class MainActivity extends Activity{ public int count; } First set the value in AddedTask public class AddedTask extends Fragment{ .... ((MainActivity)getActivity()).count = adapter.getcount(); } To...

Dynamically Increase the text count on click in BaseAdapter

android,android-listview,android-adapter,android-cursoradapter

Dynamically Increase the text count on click in BaseAdapter Do it as using getTag/setTag: @Override public void onClick(View c) { int count=0; if(v.getTag()==null) count=0; else{ count=Integer.parseInt(v.getTag().toString()); } count++; ((TextView)v).setText("Like"+count); v.setTag(count); } ...

How to Perform Update and Delete operation in listview item row while Click the button in CursorAdapter

Finally I done it on my own.But instead of using Cursor Adapter I am using Base Adapter to get the output. I referred this Tutorial.I took more time to find this tutorial.It helped me a lot.Then I change some modification for the front page and for my requirement. I change...

Refreshing listview duplicates content

android,listview,android-adapter

I got it. I wasn't also clearing the other arrays I was using to populate myList. After logging the various stages, I realised these arrays were duplicated so I just needed to clear them as well. This is the final work.Thanks @Lavkush2oct and @Vesko for the help. listView.setOnRefreshListener(new OnRefreshListener() {...

Loading image in onCreate doesn't fill adapter correctly

android,storage,android-adapter

Solved by changing the for loop in on Create: if (dirFiles.length != 0) { // loops through the array of files, outputing the name to console for (int ii = 0; ii < dirFiles.length; ii++) { File file = dirFiles[ii]; String path = file.getAbsolutePath(); SelfieRecord selfie = new SelfieRecord(); selfie.setPic(path);...

ClassCastException in adapter with 2 layouts

android,android-listview,android-adapter,android-viewholder

Change the implementation of getViewTypeCount and getItemViewType like: @Override public int getViewTypeCount() { return 2; } @Override public int getItemViewType(int position) { if (getItem(position).isParentOrMyObject()) { return 0; } return 1; } this way you will get two differents convertView. The one at index 0, when isParentOrMyObject() return true, the one...

What action triggers onItemSelected in a ListView?

java,android,listview,android-adapter

so I was under the impression that clicking the item was enough. Clicks are not selections with a ListView. A selection will occur either when: you set a selection programmatically, or the user uses a five-way navigation option (e.g., D-pad, trackball, arrow keys) and presses up/down on that to...

ListView Adapter executing onclick methods on multiple rows simultaneously for a single click event

java,android,android-adapter,baseadapter,listadapter

I got it working by using HashMap as SAM suggested. Here is what I did. in Adapter class HashMap<Long, String> map = new HashMap<Long, String>(); in getView()method of adapter if(post.postlikeflag==0){ map.put(post.postid, "like"); } else{ map.put(post.postid,"liked"); } if(map.get(post.postid).equals("like")) { holder.like.setBackgroundResource(R.drawable.like); } else { holder.like.setBackgroundResource(R.drawable.liked); } And in onclickListener of like button...

Android-Access string from bundle to customadapter class

Hoping that you are calling add2cart activity from some activity by passing bundle. check in that activity whether bundle is properly created. And to pass value "sme" to CartAdapter.java, either declare it as static String and fetch it in CartAdapter using "add2cart.sme" or pass it in constructor of CartAdapter public...

ListView getChildrenCount is 0

java,android,listview,android-listview,android-adapter

Instead of getChildAt() try using this public View getViewByPosition(int pos, ListView listView) { final int firstListItemPosition = listView.getFirstVisiblePosition(); final int lastListItemPosition = firstListItemPosition + listView.getChildCount() - 1; if (pos < firstListItemPosition || pos > lastListItemPosition ) { return listView.getAdapter().getView(pos, null, listView); } /*else { final int childIndex = pos -...

retrieve values of NumberPicker in listview (custom adapter)

android,android-listview,android-adapter,numberpicker

Finally find the solution by myself. public void onClick(View v) { ArrayList<String> QrEtOccurence = new ArrayList<String>(); TextView tvNomDuQr; NumberPicker npNbJours; Integer j = 0; for (int i = 0; i < lv.getCount(); i++) { v = lv.getChildAt(i); tvNomDuQr=(TextView)v.findViewById(R.id.NomQr); npNbJours=(NumberPicker)v.findViewById(R.id.numberPickerOccurence); String NomDuQr=tvNomDuQr.getText().toString(); Integer NbJours=npNbJours.getValue(); String output = "Présenter durant "+NbJours+" jours...

RecyclerView - Where should I handle its click events?

android,android-adapter,android-adapterview

Create your own viewHolder for the recycler view as we always do it, and in the onBindView method, set the click listener to the view you wish to perform the click. @Override public void onBindViewHolder(final ViewHolder viewHolder, int position) { viewHolder.mRelContent.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //...

Remove a list-item on click inside a custom adapter

android,android-arrayadapter,android-adapter,baseadapter,listadapter

Try it as using remove method of List and call notifyDataSetChanged : public void onClick(View v) { // delete this first list item here products.remove(0); notifyDataSetChanged(); } ...

ListView not showing at all

Your getCount() method is returning 0 @Override public int getCount() { return 0; } change it to return the size of your list @Override public int getCount() { return listContact.size(); } ...

Android - How to add dummy items to ListView

android-webview,android-adapter

I know exactly what you want. Do this in your layout: <ListView ... android:paddingBottom="16dp" android:clipToPadding="false" /> clipToPadding when set to false will add that space in the end of your ListView if you have added padding. Its default value is set to true and that causes the padding to stay...

Android WebView in a ViewSwitcher loadUrl loads once

I solved the problem by implementing a static ViewHolder on the WebView whose reference I needed to keep longer than its views' lifecycle. private static final class WebViewHolder { WebView wv; } @Override public void onSharedPreferenceChanged(SharedPreferences pref, String key) { WebViewHolder holder = new WebViewHolder(); if (key.equals("webviewUrl")) { if (wv...

No adapter attached; skipping layout

android,android-adapter,recyclerview,android-cardview

You didn't attach the adapter because you create it after you try to attach it: mRecyclerView.setAdapter(mAdapter); // Here, mAdapter is null mAdapter = new CountryAdapter(CountryManager.getInstance().getCountries(), R.layout.card_layout, getActivity()); ...

Why elements adding at the end of ListView?

android,android-layout,android-listview,android-adapter

I think this is because of your layout file. Change the android:layout_height=wrap_content of your ListView tag to android:layout_height=match_parent.

Android ListView displays nothing but doesn't crash

android,listview,android-fragments,android-listview,android-adapter

You are setting null adapter so it is not refreshing. you are commented initialization part check in the following method: @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); // remove the dividers from the ListView of the ListFragment settingsList = getListView(); settingsList.setDivider(null); mItems = new ArrayList<SettingsCategories>(); Resources resources...

Getting Nullpointer at MyAdapter.getView,how to fix?

android,textview,android-adapter,null-pointer

Just copy and paste it. @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // navdra = getResources().getStringArray(R.array.navdra); listView = (ListView) findViewById(R.id.drawerlist); myAdapter = new MyAdapter(this); // listView.setAdapter(new ArrayAdapter<String>(this, // android.R.layout.simple_expandable_list_item_1, navdra)); listView.setAdapter(myAdapter); listView.setOnItemClickListener(this); drawerLayout = (DrawerLayout)...

No data inside the custom adapter

android,android-adapter,android-viewholder,android-recyclerview

The problem is that you didnt reference the List of data you just passed in your constructor therefore the data list is empty: public InformationAdapter(Context context, List<Information> data) { inflator= LayoutInflater.from(context); } It should be public InformationAdapter(Context context, List<Information> data) { inflator= LayoutInflater.from(context); this.data = data; } ...

Dynamically change the number of columns of a GridLayoutManager

android,gridview,android-adapter,android-gridlayout

mGridLayoutManager = new GridLayoutManager(mContext, 2); mGridLayoutManager.setSpanSizeLookup(onSpanSizeLookup); /** * Helper class to set span size for grid items based on orientation and device type */ GridLayoutManager.SpanSizeLookup onSpanSizeLookup = new GridLayoutManager.SpanSizeLookup() { @Override public int getSpanSize(int position) { return mHomeListAdapter.getItemViewType(position) ) == TYPE_PREMIUM ? 2 : 1; } }; ...

Accessing imageview inside adapter on OnItemClickListener

android,android-adapter,onitemclicklistener

There are multiple solutions to solve this issue. You can either get the views you want to hide / show via the view you get in the onClickListener public void onItemClick(AdapterView<?> parent, View view, int position, long id) { view.findViewById(R.id.optionbackground).setVisibility(View.VISIBLE); ... } or you define the onClickListener inside your adapter...

Finding row layout id in an ArrayAdapter methods

android,android-layout,android-arrayadapter,android-adapter

You cannot actually access the resource parameter passed to the constructor, since it's private to the ArrayAdapter class. You could, however, call super.getView(), which will inflate a new View from the supplied resource id. See the ArrayAdapter code: public View getView(int position, View convertView, ViewGroup parent) { return createViewFromResource(position, convertView,...

Loading image from URL in custom adapter for ListView (Android Studio)

android,image,url,android-listview,android-adapter

The easiest way to solve your problem is using some library, for example Picasso. It is not only easier to use and make your code easier to read, but also prevents you from OutOfMemory Exceptions, when images are too big. Loading image is then matter of one line: Picasso.with(context) .load(urlOfYourImage)...

How to set data to custom row TextView in ListView

android,android-arrayadapter,android-adapter

You'll need to improve your ArrayAdapter. Currently you're not setting the data to the TextView. Try the following, I didn't test it but it should work. public class CategoryAdapter extends ArrayAdapter { private LayoutInflater inflater; public CategoryAdapter(Activity activity, ArrayList<Category> items){ super(activity, R.layout.row_category, items); inflater = activity.getWindow().getLayoutInflater(); } @Override public View...

How to override getItem()?

Assign the list to a class variable and access it public class FruitAdapter extends ArrayAdapter<Fruit> { private int resourceId; private List<Fruit> mObjects; public FruitAdapter(Context context, int textViewResourceId, List<Fruit> objects) { super(context, textViewResourceId, objects); resourceId = textViewResourceId; mObjects =objects; } @Override public View getView(int position, View convertView, ViewGroup parent){ Fruit fruit...

RecyclerView.Adapter custom filter exception

android,android-adapter,android-recyclerview

Alright, it seems like Filters don't work well with List<> objects. I changed: filteredNames from being a List < FolderRow > object to ArrayList < FolderRow > . That got it working. ...

Android fragment emtpy in viewpager when i come back in

android,android-fragments,android-viewpager,android-adapter

Use this code adapter = new MyPagerAdapter(getChildFragmentManager()); instead of adapter = new MyPagerAdapter(getFragmentManager()); ...

Android: Change listview layout when searching adapter?

android,android-adapter,retrofit

Add view having same width and height as that of Listview set visibility to INVISIBLE, in onCreate() load the data in listview check if data size greater than 0 (zero) then hide that view and if data size if its less than or equal to 0 (zero) show view. View...

Android adapter populated by Retrofit callback

This usually works for me: @Override public int getItemCount() { return _foo == null ? 0 : _foo.size(); } returns 0 if the list of elements is null, otherwise it returns the size. This is because we know that when _foo is empty, the size is 0 because there is...

How to append records in listview

The solution is quite simple. You have some backing data that the ListView displays via an adapter. Whenever the user click the "Load More" button, load some more data and call adapter.notifyDataSetChanged(). That's it....

Dynamic measure text in a a custom listview item, OnGlobalLayoutListener only called once