Java.lang.ClassCastException: android.widget.LinearLayout $ LayoutParams cannot be cast to android.support.v7.widget.RecyclerView $ LayoutParams

I have a RecyclerView with LinearLayout inside. LinearLayout consists of 9 buttons. Before some changes, I could press buttons and it didn't crash. But after I added this code below it gives an error and doesn't show where it came from:

java.lang.ClassCastException: android.widget.LinearLayout $ LayoutParams cannot be applied to android.support.v7.widget.RecyclerView $ LayoutParams

Import to adapter:

    import android.content.Context;
import android.graphics.Color;
import android.support.v7.widget.RecyclerView;
import android.widget.LinearLayout.LayoutParams;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

      

        
        
        
      

    

Added this to onClickListener:

tempTag = (int) v.getTag();
mAdapter.grayButton(tempTag / 9, tempTag % 9);
zahl1 = Integer.parseInt(mAdapter.getText(tempTag).toString());

      

        
        
        
      

    

Added this method to RecyclerView.Adapter:

    public void grayButton(int row, int element){
    recycleViewDatas.get(row).setGray(element);
    notifyItemChanged(row);
}

      

        
        
        
      

    

Added this code to onBindViewHolder:

LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
viewHolder.ll.setLayoutParams(lp);
lp.height = viewHolder.ll.getLayoutParams().height - (int) (viewHolder.buttons.get(j).getLayoutParams().height - recycleViewDatas.get(i).getSize()) + 30;
viewHolder.ll.setLayoutParams(lp);
if(recycleViewDatas.get(i).getGray() == j)
     viewHolder.buttons.get(j).setTextColor(Color.GRAY);
else if(recycleViewDatas.get(i).getGray() == -1)
     viewHolder.buttons.get(j).setTextColor(Color.BLACK);

      

        
        
        
      

    

This is my ViewHolder:

public static class ViewHolder extends RecyclerView.ViewHolder {
    LinearLayout ll;
    private ArrayList<Button> buttons = new ArrayList<>();

    public ViewHolder(View v, Context context) {
        super(v);

        ll = (LinearLayout) v.findViewById(R.id.llRecycleView);
        for (int i = 0; i < ll.getChildCount(); i++) {
            buttons.add((Button) ll.getChildAt(i));
        }
    }
}

      

        
        
        
      

    

Recycleviewdata layout file:

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="9"
android:background="@drawable/zeile"
android:id="@+id/llRecycleView">

<Button
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:textColor="@android:color/black"
    android:background="@android:color/transparent"
    android:textSize="23sp"
    android:clickable="false"
    android:layout_gravity="center"
    android:gravity="center" />

      

        
        
        
      

    

... more buttons

MainActivity layout:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">

<LinearLayout
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:weightSum="2"
    android:background="@drawable/top">
...some buttons
</LinearLayout>

<android.support.v7.widget.RecyclerView
    android:id="@+id/my_recycler_view"
    android:scrollbars="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/></LinearLayout>

      

        
        
        
      

    

I don't understand why the error occurs after the update. And the app only crashes on my M9. It doesn't crash on the HTC One V and everything works as expected. Do you know the problem? Do you need any more code?