怎么使菜单栏完全覆盖页面修改哪个代码
怎么使菜单栏完全覆盖页面修改哪个代码
2 回答
public class SlidingMenu extends HorizontalScrollView
{
private LinearLayout mWapper;
private ViewGroup mMenu;
private ViewGroup mContent;
private int mScreenWidth;
private int mMenuWidth;
// dp
private int mMenuRightPadding =0;
private boolean once;
private boolean isOpen;
/**
* 未使用自定义属性时，调用
*
* @param context
* @param attrs
*/
public SlidingMenu(Context context, AttributeSet attrs)
{
this(context, attrs, 0);
}
/**
* 当使用了自定义属性时，会调用此构造方法
*
* @param context
* @param attrs
* @param defStyle
*/
public SlidingMenu(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
// 获取我们定义的属性
TypedArray a = context.getTheme().obtainStyledAttributes(attrs,
R.styleable.SlidingMenu, defStyle, 0);
int n = a.getIndexCount();
for (int i = 0; i < n; i++)
{
int attr = a.getIndex(i);
switch (attr)
{
case R.styleable.SlidingMenu_rightPadding:
mMenuRightPadding = a.getDimensionPixelSize(attr,
(int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP, 0, context
.getResources().getDisplayMetrics()));
break;
}
}
a.recycle();
WindowManager wm = (WindowManager) context
.getSystemService(Context.WINDOW_SERVICE);
DisplayMetrics outMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(outMetrics);
mScreenWidth = outMetrics.widthPixels;
}
public SlidingMenu(Context context)
{
this(context, null);
}
/**
* 设置子View的宽和高 设置自己的宽和高
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
if (!once)
{
mWapper = (LinearLayout) getChildAt(0);
mMenu = (ViewGroup) mWapper.getChildAt(0);
mContent = (ViewGroup) mWapper.getChildAt(1);
mMenuWidth = mMenu.getLayoutParams().width = mScreenWidth
- mMenuRightPadding;
mContent.getLayoutParams().width = mScreenWidth;
once = true;
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
/**
* 通过设置偏移量，将menu隐藏
*/
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b)
{
super.onLayout(changed, l, t, r, b);
if (changed)
{
this.scrollTo(mMenuWidth, 0);
}
}
@Override
public boolean onTouchEvent(MotionEvent ev)
{
int action = ev.getAction();
switch (action)
{
case MotionEvent.ACTION_UP:
// 隐藏在左边的宽度
int scrollX = getScrollX();
if (scrollX >= mMenuWidth / 2)
{
this.smoothScrollTo(mMenuWidth, 0);
isOpen = false;
} else
{
this.smoothScrollTo(0, 0);
isOpen = true;
}
return true;
}
return super.onTouchEvent(ev);
}
/**
* 打开菜单
*/
public void openMenu()
{
if (isOpen)
return;
this.smoothScrollTo(0, 0);
isOpen = true;
}
public void closeMenu()
{
if (!isOpen)
return;
this.smoothScrollTo(mMenuWidth, 0);
isOpen = false;
}
/**
* 切换菜单
*/
public void toggle()
{
if (isOpen)
{
closeMenu();
} else
{
openMenu();
}
}
}
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