SearchBox back button bugfix

MySearchBox.java

import android.app.Activity;
import android.content.Context;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.View;

import com.quinny898.library.persistentsearch.SearchBox;

/**
 * Created by Ilya Eremin on 11/18/15.
 */
public class MySearchBox extends SearchBox {

    private Activity activity;
    
    public void setActivity(Activity activity){
        this.activity = activity;
    }

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

    public MySearchBox(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public boolean dispatchKeyEvent(KeyEvent e) {
        if (e.getKeyCode() == KeyEvent.KEYCODE_BACK && this.getVisibility() == View.VISIBLE) {
            this.hideCircularly(activity);
            return true;
        } else {
            return super.dispatchKeyEvent(e);
        }
    }
}

thank you that fixed the issue

mSearchBox = (MySearchBox) findViewById(R.id.search_box);
mSearchBox.setActivity(this);

don't forget setActivityis essential