ViewUtil工具类

ViewUtil工具类

设置当前是否需要隐藏

设置View是否可用

扩大View的触摸和点击响应范围,最大不超过其父View范围

/******************************************
 * 类描述:操作View的工具类
 * 
 * @author: yangshaoning
 ******************************************/

public final class ViewUtil {
    private ViewUtil() {
    }

    /**
     * 设置当前是否需要隐藏
     *
     * @param view
     * @param visibility
     */
    public static void setViewVisibility(View view, int visibility) {
        if (view == null) {
            return;
        }
        if (view.getVisibility() == visibility) {
            return;
        }
        view.setVisibility(visibility);
    }

    /**
     * 设置View是否可用
     *
     * @param view
     * @param isEnable
     */
    public static void setEnabled(View view, boolean isEnable) {
        if (view == null) {
            return;
        }
        if (view.isEnabled() == isEnable) {
            return;
        }
        view.setEnabled(isEnable);
    }

    /**
     * 扩大View的触摸和点击响应范围,最大不超过其父View范围
     *
     * @param view
     * @param top
     * @param bottom
     * @param left
     * @param right
     */
    public static void expandViewTouchDelegate(final View view, final int top,
                                               final int bottom, final int left, final int right) {
        ((View) view.getParent()).post(new Runnable() {
            @Override
            public void run() {
                Rect bounds = new Rect();
                view.setEnabled(true);
                view.getHitRect(bounds);

                bounds.top -= top;
                bounds.bottom += bottom;
                bounds.left -= left;
                bounds.right += right;

                TouchDelegate touchDelegate = new TouchDelegate(bounds, view);

                if (View.class.isInstance(view.getParent())) {
                    ((View) view.getParent()).setTouchDelegate(touchDelegate);
                }
            }
        });
    }
}