我有一个显示圆圈的小程序，当您单击该圆圈时，它会重新出现在屏幕上的其他位置。
这在 90% 的情况下都有效，但有时这个圈子有问题。它可能出现在视图之外，显示为椭圆而不是圆形，或者放置在视图的中间。
谁能指出我正确的方向，我做错了什么？
屏幕：
代码示例：
public class Activity1 : Activity
{
int margin = 20;
Button ball;
TextView debug;
RelativeLayout mRel;
RelativeLayout.LayoutParams ballParams;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Create a debug label
debug = new TextView(this);
// Create a new ball
ball = new Button(this);
ball.SetBackgroundDrawable(Resources.GetDrawable(Resource.Drawable.round_button));
ball.Click += (o, e) => {
RandomizePosition();
};
// Set ball parameters
ballParams = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WrapContent,
RelativeLayout.LayoutParams.WrapContent);
// Create relative layout
mRel = new RelativeLayout(this);
mRel.SetBackgroundColor(Color.AntiqueWhite);
mRel.AddView(ball);
mRel.AddView(debug);
SetContentView(mRel);
// Randmize the ball position
RandomizePosition ();
}
void RandomizePosition ()
{
// Get height and width
Display display = WindowManager.DefaultDisplay;
int width = display.Width;
int height = display.Height;
int relativeBallSize = ((((width * 2) + (height * 2)) / 100) * 3);
// Set random parameters
Random r = new Random();
int maxWidth = (width - relativeBallSize);
int maxHeight = (height - relativeBallSize);
int x = r.Next(margin, (maxWidth < margin) ? margin : maxWidth);
int y = r.Next(margin, (maxHeight < margin) ? margin : maxHeight);
// Place the ball randomly
ballParams.SetMargins(x, y, x, y);
ball.LayoutParameters = ballParams;
ball.SetHeight(relativeBallSize);
ball.SetWidth(relativeBallSize);
debug.SetText(string.Format("X = {0}, Y = {1}, Width = {2}, Height = {3}, Ball Width = {4}, Ball Height = {5}, Ball size = {6}", x, y, width, height, ball.Width, ball.Height, relativeBallSize), TextView.BufferType.Normal);
}
}