I need to go into UnityPlayerActivity, and do something, then open a new Activity and pass the result of the operation, and close the current UnityPlayerActivity.
call method in UnityPlayerActivity:

public void onVideoRecorded(String videoPath) {
    Intent intent = new Intent();
    intent.setClassName(this, "com.example.my.activity.VideoActivity");
    intent.putExtra("MP4_PATH", videoPath);
    startActivity(intent);
    finish();
}  

to prevent the current process from being suspended by kill when exiting, the kill () method of UnityPlayer is rewritten:

class MyUnityPlayer extends UnityPlayer {

        public MyUnityPlayer(Context context) {
            super(context);
        }

        @Override
        protected void kill() {

        }
    }

and change the type of mUnityPlayer to MyUnityPlayer. But it still doesn"t work. After entering the VideoActivity interface, the interface will get stuck, and then the interface will collapse after a few seconds.

Why does it crash to call finish () to close the UnityPlayerActivity interface immediately after opening an Activity?