RecyclerView IndexOutOfBoundsException

Question

Why exception execute when I removed some items in RecyclerView by using loop ? I used Collentions.synchronizedMap in adapter and 'deleteItem method' use synchronized too (the method in fragment).

public void elementController(JsonObject jsonObject , String type)   {
    if ( jsonObject == null || type == null )    {
        return;
    }

    int position =0 , resultPosition =0;
    if ( type.equals("update") || type.equals("delete"))    {

        String id = jsonObject.get(ELEMENT_ID).getAsString();
        Map<String , Element> map = gridFragment.getMap();

        synchronized (map) {  
            for (String s : map.keySet()) {
                if (s.equals(id)) {
                    resultPosition = position;
                } else {
                    position++;
                }
            }
        }
    }

    if(position-1 > gridFragment.getmAdapter().getData().size() || position <0)   {
        return;
    }
    switch (type)   {
        case "add":
            if (gridFragment.addElement(MyJsonParser.ElementParse(jsonObject),0)){
                LogUtils.logDebug(TAG,"add end");
            }
            break;
        case "update":
            if(gridFragment.updateElement( updateParser(jsonObject),resultPosition)){
                LogUtils.logDebug(TAG,"update end");
            }
            break;
        case "delete":
            if(gridFragment.deleteElement(jsonObject.get(ELEMENT_ID).getAsString(),resultPosition)){
                LogUtils.logDebug(TAG,"delete end");
            }
            break;
    }
}

---

public boolean deleteElement(final String id , final int position){
    new Thread(new Runnable() {
        @Override
        public void run() {
            getActivity().runOnUiThread(new Runnable(){
                @Override
                public void run() {
                    synchronized (map) {
                        map.remove(id);
                        mAdapter.setData(map);
                        mAdapter.notifyItemRemoved(position);
                    }
                }
            });
        }
    }).start();

    return true;
} 

My error Log:

java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid item position 0(offset:0).state:4
        at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:3382)
        at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:3340)
        at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1810)
        at android.support.v7.widget.GridLayoutManager.layoutChunk(GridLayoutManager.java:356)
        at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1269)
        at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:523)
        at android.support.v7.widget.GridLayoutManager.onLayoutChildren(GridLayoutManager.java:151)
        at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:1942)
        at android.support.v7.widget.RecyclerView.resumeRequestLayout(RecyclerView.java:1171)
        at android.support.v7.widget.RecyclerView$1.run(RecyclerView.java:167)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
        at android.view.Choreographer.doCallbacks(Choreographer.java:574)
        at android.view.Choreographer.doFrame(Choreographer.java:543)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
        at android.os.Handler.handleCallback(Handler.java:733)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:212)
        at android.app.ActivityThread.main(ActivityThread.java:5137)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:718)
        at dalvik.system.NativeStart.main(Native Method)

device not found

Answer 1

It can be solved like this:

dataList.remove(item)
notifyItemRemoved(adapterPosition)

Answer 2

For animation does not disappear, use:

holder.deleteItem.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                itemList.remove(position);
                notifyItemRemoved(position);
                notifyItemRangeChanged(position, itemList.size());
            }
        });