HeadsUp: Fix dismiss on back key press.

import android.graphics.Rect;

import android.util.AttributeSet;

import android.util.Log;

import android.view.KeyEvent;

import android.view.MotionEvent;

import android.view.View;

import android.view.ViewConfiguration;

        mBar.onHeadsUpDismissed();

    }

    @Override

    public boolean dispatchKeyEvent(KeyEvent event) {

        boolean down = event.getAction() == KeyEvent.ACTION_DOWN;

        switch (event.getKeyCode()) {

            case KeyEvent.KEYCODE_BACK:

                if (!down && !event.isCanceled()) {

                    mBar.hideHeadsUp();

                }

                return true;

        }

        return super.dispatchKeyEvent(event);

    }

    @Override

    public void onBeginDrag(View v) {

        // We need to prevent any surrounding View from intercepting us now.