ViewHolder ArrayIndexOutOfBoundsException: length = 2; Index = 2

Question

I am trying to use two types of views and two types of ViewHolrdes, but I got an error:

java.lang.ArrayIndexOutOfBoundsException: length=2; index=2 at android.widget.AbsListView$RecycleBin.addScrapView(AbsListView.java:6705) at android.widget.AbsListView.trackMotionScroll(AbsListView.java:5210) at android.widget.AbsListView$FlingRunnable.run(AbsListView.java:4368) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:776) at android.view.Choreographer.doCallbacks(Choreographer.java:579) at android.view.Choreographer.doFrame(Choreographer.java:547) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:762) at android.os.Handler.handleCallback(Handler.java:800) at android.os.Handler.dispatchMessage(Handler.java:100) at android.os.Looper.loop(Looper.java:194) at android.app.ActivityThread.main(ActivityThread.java:5371) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:525) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) at dalvik.system.NativeStart.main(Native Method) 

And here is my adapter:

 public class FriendsListAdapterFromKesh extends ArrayAdapter<FriendListEntryItem> { List<FriendListEntryItem> friends; List<FriendListEntryItem> friendsWithoutPoints; Context context; private LayoutInflater inflater; private LayoutInflater mLayoutInflater; private static String ROOT_DIRECTORY_PATH = Environment.getExternalStorageDirectory() + File.separator + ".SleepKeeker/Photos old"; FriendsTab friendsTab; public FriendsListAdapterFromKesh(Context context, final List<FriendListEntryItem> friends, final List<FriendListEntryItem> friendsWithoutPoints) { super(context, 0); this.context = context; inflater = LayoutInflater.from(context); this.friendsWithoutPoints = friendsWithoutPoints; this.friends = friends; friendsTab = new FriendsTab(); mLayoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); } public void updateList(List<FriendListEntryItem> newlist1, List<FriendListEntryItem> newlist2) { friends.clear(); friends.addAll(newlist1); friendsWithoutPoints.clear(); friendsWithoutPoints.addAll(newlist2); this.notifyDataSetChanged(); } public List<FriendListEntryItem> getFriends() { return friends; } @Override public int getCount() { return friends.size() + friendsWithoutPoints.size(); } public String getIdSocTypeName(int position) { if (friends == null || position + 1 >= friends.size()) { return ""; } FriendListEntryItem ei = friends.get(position - 1); return ei.userId + "," + ei.socType + "," + ei.name; } static class ViewHolder1 { public ImageView image = null; public TextView title = null; public TextView subtitle = null; } static class ViewHolder2 { public ImageView image; public TextView title; public TypefacedButton button; } @Override public int getItemViewType(int pos) { if (pos < friends.size()) return 1; return 2; } //@TargetApi(Build.VERSION_CODES.JELLY_BEAN) @Override public View getView(int position, View convertView, ViewGroup parent) { int viewType = getItemViewType(position); ViewHolder1 viewHolder1 = null; ViewHolder2 viewHolder2 = null; if (convertView == null) { if (viewType == 1) { LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = inflater.inflate(R.layout.list_frnds_item_with_points, parent, false); viewHolder1 = new ViewHolder1(); viewHolder1.title = (TextView) convertView.findViewById(R.id.list_item_title_friend); viewHolder1.image = (ImageView) convertView.findViewById(R.id.imageFriendAva); viewHolder1.subtitle = (TextView) convertView.findViewById(R.id.list_item_friend_woke_time); convertView.setTag(viewHolder1); } else { LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = inflater.inflate(R.layout.list_frnds_item_without_points, parent, false); viewHolder2 = new ViewHolder2(); viewHolder2.title = (TextView) convertView.findViewById(R.id.list_item_title_friend); viewHolder2.image = (ImageView) convertView.findViewById(R.id.imageFriendAva); viewHolder2.button = (TypefacedButton) convertView.findViewById(R.id.inviteButton); viewHolder2.button.setClickListner(); convertView.setTag(viewHolder2); } } else { if (viewType == 1) { viewHolder1 = (ViewHolder1) convertView.getTag(); } else { viewHolder2 = (ViewHolder2) convertView.getTag(); } } if (viewType == 1) { final FriendListEntryItem ei = friends.get(position); viewHolder1.title.setText(ei.name); viewHolder1.subtitle.setText(ei.wokeTime); File picture = findPicture(ei.name); if (picture != null && picture.exists()) { Picasso.with(context).load("file://" + picture.getAbsolutePath()).fit().centerCrop().into(viewHolder1.image); } } else { final FriendListEntryItem ei2 = friendsWithoutPoints.get(position - friends.size()); viewHolder2.title.setText(ei2.name); viewHolder2.button.setFriendItem(ei2); File picture = findPicture(ei2.name); if (picture != null && picture.exists()) { Picasso.with(context).load("file://" + picture.getAbsolutePath()).fit().centerCrop().into(viewHolder2.image); } } return convertView; } @Override public int getViewTypeCount() { return 2; } private File findPicture(String name) { File root = new File(ROOT_DIRECTORY_PATH); if (root!= null) { File[] files = root.listFiles(); if (files == null) return null; for (int i = 0; i<files.length; i++) { Log.d("qedsds", "" + files[i].getName()); if (files[i].getName().contains(name)) return files[i]; } } return null; } } 

Error scrolling list. But I do not understand why. I spent a lot of time solving this problem, but to no avail

Answer 1

Replace

 @Override public int getItemViewType(int pos) { if (pos < friends.size()) return 1; return 2; } 

 @Override public int getItemViewType(int pos) { if (pos < friends.size()) return 0; return 1; } 

From the adapter documentation for the getItemViewType method (my emphasis):

Returns

An integer representing the type of representation. Two views must have the same type if it can be converted to another in getView (int, View, ViewGroup). Note. Integers must be in the range 0 to getViewTypeCount () - 1 . IGNORE_ITEM_VIEW_TYPE can also be returned.

You are currently returning the values ​​1 and 2 for the view type. You need to return the values ​​0 and 1 in order to fulfill the condition in bold.