startactivity not working in android adapter

1 holder.fab.setOnClickListener(new View.OnClickListener() {
2            @Override
3            public void onClick(View v) {
4                Intent intent = new Intent(series.getApplicationContext(),VideoActivity.class);
5                String url = response.get(position).getUrl();
6                Bundle bundle = new Bundle();
7                bundle.putString("key_1",url);
8                intent.putExtras(bundle);
9                mContext.startActivity(intent);
10            }
11        });

1override fun onClick(v: View?) {
2	val intent = Intent(v.context, TimerActivity::class.java)
3
4	v.context.startActivity(intent)
5}