Android左右滑动菜单

public class MainSlidingMenuView extends FrameLayout {

   private View menuView;
   private View contentView;
   private int mScreenWidth;
   private Scroller mScroller;

   public MainSlidingMenuView(Context context, AttributeSet attrs, int defStyle) {
       super(context, attrs, defStyle);
       init(context);
   }

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

   public MainSlidingMenuView(Context context) {
       super(context);
       init(context);
   }

   private void init(Context context) {
       mScroller = new Scroller(getContext());
       WindowManager windowManager = ((Activity) context).getWindow()
               .getWindowManager();
       Display display = windowManager.getDefaultDisplay();
       mScreenWidth = display.getWidth();
       Loger.e("mScreenWidth = "+mScreenWidth);
   }

   public void setMenuView(View view) {
       LayoutParams lp = new LayoutParams(LayoutParams.FILL_PARENT,
               LayoutParams.FILL_PARENT);
       addView(view, lp);
       menuView = view;
   }

   public void setContentView(View view) {
       LayoutParams lp = new LayoutParams(LayoutParams.FILL_PARENT,
               LayoutParams.FILL_PARENT);
       addView(view, lp);
       contentView = view;
       contentView.bringToFront();
   }

   @Override
   public void scrollTo(int x, int y) {
       super.scrollTo(x, y);
       postInvalidate();
   }

   @Override
   public void computeScroll() {
       if (mScroller.computeScrollOffset()) {
           int oldX = contentView.getScrollX();
           int oldY = contentView.getScrollY();
           int x = mScroller.getCurrX();
           int y = mScroller.getCurrY();
           if (oldX != x || oldY != y) {
               if (contentView != null) {
                   contentView.scrollTo(x, y);
               }
           }
           invalidate();
       }
   }

   private void smoothScrollTo(int dx) {
       int duration = 500;
       int oldScrollX = contentView.getScrollX();
       mScroller.startScroll(oldScrollX, contentView.getScrollY(), dx,
               contentView.getScrollY(), duration);
       invalidate();
   }

   public boolean isContentViewShow() {
int scrollX = contentView.getScrollX();
Loger.e("scrollX = "+scrollX);
if (scrollX == 0) {
return true;
}
return false;
}

   public boolean isInMenuView(){
       int scrollX = contentView.getScrollX();
       return -mScreenWidth==scrollX;
   }

   public boolean isScroling(){
       int scrollX = contentView.getScrollX();
       return scrollX!=0&&scrollX!=-mScreenWidth;
   }

   public final boolean showMenuAnimation = true;
   public void showMenuView() {
       Animation animation = null;
       int oldScrollX = contentView.getScrollX();
       if (oldScrollX == 0) {
//           Log.e("zx","oldScrollX == 0");//fanhui
           menuView.setVisibility(View.VISIBLE);
           smoothScrollTo(-mScreenWidth);
           animation = new TranslateAnimation(-200, 0, 0, 0);
       } else if (oldScrollX == -mScreenWidth) {
           smoothScrollTo(mScreenWidth);
           animation = new TranslateAnimation(0, -200, 0, 0);
       }
       if(!showMenuAnimation) return;
       animation.setDuration(500);
       menuView.startAnimation(animation);
   }

}

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