自定义Toolbar添加双击事件

public class SuperToolbar extends Toolbar implements TapListener.OnDoubleTapListener {

    private OnTwoTapListener mOnTwoTapListener;
    private GestureDetector mDetector;


    public interface OnTwoTapListener {
        void onTwoTap();
    }

    public void setOnTwoTapListener(OnTwoTapListener onTwoTapListener) {
        mOnTwoTapListener = onTwoTapListener;
    }

    public SuperToolbar(Context context) {
        this(context, null);
    }

    public SuperToolbar(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, android.support.v7.appcompat.R.attr.toolbarStyle);
    }

    public SuperToolbar(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        TapListener tapListener = new TapListener(this);
        mDetector = new GestureDetector(context, tapListener);
    }


    @Override
    public void onDouble() {
        mOnTwoTapListener.onTwoTap();
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        super.onTouchEvent(ev);
        mDetector.onTouchEvent(ev);
        return true;
    }
}

public class TapListener extends GestureDetector.SimpleOnGestureListener {

    private OnDoubleTapListener mDoubleTapListener;

    public TapListener(OnDoubleTapListener onDoubleTapListener) {
        mDoubleTapListener = onDoubleTapListener;
    }

    public interface OnDoubleTapListener {
        void onDouble();
    }

    @Override
    public boolean onDoubleTap(MotionEvent e) {
        mDoubleTapListener.onDouble();
        return true;
    }
}

SuperToolbar toolbar = (SuperToolbar) actView.findViewById(R.id.tool_bar);
toolbar.setOnTwoTapListener(new SuperToolbar.OnTwoTapListener() {
    @Override
    public void onTwoTap() {
        //我的一个工具显示Toast，在双击后让RecyclerView返回列表顶部
        // 在这里可以干你自己想干的事情，whatever，who care！
        mUtils.sToast("双击！双击！Toolbar！");
        mRecycler.smoothScrollToPosition(0);
    }
});