public class SearchAdapter{
Context context;

public SearchAdapter(Context context) {
    this.context = context;
}
class ViewHolder extends RecyclerView.ViewHolder {
    TextView userName,statusText,userEmail;
    ImageView profilePic;
    LinearLayout user;
    UserModel model;
    public ViewHolder(@NonNull View itemView) {
        super(itemView);
        user=itemView.findViewById(R.id.search_user_recycler_view);
        userName=itemView.findViewById(R.id.user_name_text);
        statusText=itemView.findViewById(R.id.phone_text);
        userEmail=itemView.findViewById(R.id.email_text);
        profilePic=itemView.findViewById(R.id.profile_pic_image_view);
        user.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
             ** Intent intent=new Intent(context,ChattingActivity.class);
                intent.putExtra("userModel",model);
               context.startActivity(intent); **
            }
        });
    }

ChattingActivity should start after click on any item of recyclerView