我正在尝试使用 Xamarin.Android 以编程方式创建DrawerLayout
,但在尝试添加应该可以从左侧拖动的ListView
时遇到了问题..
这是我的代码:
DrawerLayout myDrawerLayout = new DrawerLayout(this);
myDrawerLayout.LayoutParameters = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MatchParent, ViewGroup.LayoutParams.MatchParent);
SetContentView(myDrawerLayout);
FrameLayout myFrameLayout = new FrameLayout(this);
myFrameLayout.LayoutParameters = new DrawerLayout.LayoutParams(ViewGroup.LayoutParams.MatchParent, ViewGroup.LayoutParams.MatchParent);
myFrameLayout.SetBackgroundColor(Android.Graphics.Color.Gray);
myDrawerLayout.AddView(myFrameLayout);
ListView myListView = new ListView(this);
myListView.SetBackgroundColor(Android.Graphics.Color.Green);
myListView.LayoutParameters = new DrawerLayout.LayoutParams( width: 240,
height: DrawerLayout.LayoutParams.MatchParent,
gravity: ????????
);
myDrawerLayout.AddView(myListView);
你可以注意到......我不知道作为gravity
参数传递什么
DrawerLayout
类中函数的定义是这样的:
public LayoutParams(int width, int height, int gravity);
所以我必须为int
传递gravity
,但是如何?
我尝试了以下内容:
myListView.LayoutParameters = new DrawerLayout.LayoutParams( width: 240, height: DrawerLayout.LayoutParams.MatchParent, gravity: Gravity.LEFT);
它给了我错误:
'Gravity'不包含'LEFT'的定义
也尝试过:
myListView.LayoutParameters = new DrawerLayout.LayoutParams( width: 240, height: DrawerLayout.LayoutParams.MatchParent, gravity: GravityFlags.Left);
但是给了我一个错误:
无法从'Android.Views.GravityFlags'转换为'int'
希望您对解决方案有所了解......并提前感谢
答案 0 :(得分:4)
你必须将标志强制转换为int,如
new DrawerLayout.LayoutParams(240, DrawerLayout.LayoutParams.WrapContent, (int)(GravityFlags.Start | GravityFlags.Left)).
答案 1 :(得分:0)
由于DrawerLayout是支持包中的一个类,因此您可以使用GravityCompat:
myListView.LayoutParameters = new DrawerLayout.LayoutParams(width: 240,
height: DrawerLayout.LayoutParams.WrapContent,
gravity: GravityCompat.Start);