android边栏菜单<上下左右四个方向>

背景:项目中应用到边菜单栏,开源项目SlidingMenu有点大,项目中用不到这么多东东.

功能:可以在上下左右四个方向上显示侧边栏

效果图(就截一个图,其它图放上去太多了,不太好):

关键性代码:

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?a.初始化时位置处理

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		/**		 * 左边栏的属性初始化		 */		protected void menuLeftProperties() {			M_LAYOUT_POSITION = ISMENU_OPEN ? 0 : -MENU_WIDTH;			//当打开时，右边的移动。理解：保持画布不动，视图区移动			M_SLIDER_MAX_OPEN = ISMENU_OPEN ? 0 : -MENU_WIDTH;			//当移动时左边的移动			M_SLIDER_MAX_CLOSE = ISMENU_OPEN ? MENU_WIDTH : 0 ;			//偏移位置			mMovePosition = ISMENU_OPEN ? 0 : -MENU_WIDTH;		}

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/** * 右边栏的属性初始化 */protected void menuRightProperties() {	M_LAYOUT_POSITION  = ISMENU_OPEN ?  -MENU_WIDTH : 0;	//打开时	M_SLIDER_MAX_OPEN = ISMENU_OPEN ? 0  : MENU_WIDTH;	//关闭时	M_SLIDER_MAX_CLOSE = ISMENU_OPEN ? -MENU_WIDTH : 0;	//偏移位置	mMovePosition = ISMENU_OPEN ? 0 : MENU_WIDTH;}

		/**		 * 判断是否需要处理事件		 * 		 * @param ev		 * @return		 */		protected boolean isInterceptTouchEvent(MotionEvent ev) {			boolean isIntercept = false;			switch (MENU_POSITION) {			case LEFT:				isIntercept = isInterceptMenuLeftTouchEvent(ev);				break;			case RIGHT:				isIntercept = isInterceptMenuRightTouchEvent(ev);				break;			case TOP:				isIntercept = isInterceptMenuTopTouchEvent(ev);				break;			case BOTTOM:				isIntercept = isInterceptMenuBottomTouchEvent(ev);				break;			}			return isIntercept;		}

/**  * 边栏左边是否要处理  * @param ev  * @return  */protected boolean isInterceptMenuLeftTouchEvent(MotionEvent ev) { //是左右滑动 boolean isIntercept = Math.abs(ev.getY() - MOTIONEVENT_Y) <= Math.abs(ev.getX() - MOTIONEVENT_X);return isIntercept && ((MOTIONEVENT_X >= 0 && MOTIONEVENT_X <= TOUCH_OPEN_MENU_DISTANCE		   && !ISMENU_OPEN && (ev.getX() - MOTIONEVENT_X) > 0)		   || (ev.getX() - MOTIONEVENT_X < 0 && ISMENU_OPEN));}

/**		 * 当Menu菜单在左边时		 * @param event		 */		protected void menuLeftMoveEvent(MotionEvent event) {			float distance =  event.getX() - MOTIONEVENT_X;			//向右滑动，打开菜单栏			if(distance > 0) {				if(distance + mMovePosition >= 0) {					ISMENU_OPEN = true;					mMovePosition = 0;					smoothScrollTo(M_SLIDER_MAX_OPEN, 0);					return ;				}else {					mMovePosition += distance;				}			}else if(distance < 0) {				if(distance + mMovePosition <= -MENU_WIDTH) {					ISMENU_OPEN = false;					mMovePosition = -MENU_WIDTH;					smoothScrollTo(M_SLIDER_MAX_CLOSE, 0);					return ;				}else {					mMovePosition += distance;				}			}			smoothScrollBy((int) - distance, 0);			MOTIONEVENT_X = event.getX();		}

?其它一些代码都做过相应的注释 整个工程在附件中.

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