0
我使用Xamarin构建Android应用程序,我需要能够在地图上放置一些点。所述地图是使用ImageView显示的图像(直接从xml添加它)。 我尝试制作一个位图和画布,它显示一个红色的点(如想),但实际的地图消失。这是我的代码:通过Android中的ImageView绘制点(使用Xamarin)
[Activity(Label = "Map")]
public class Map : Activity
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.Map);
ImageView map = FindViewById<ImageView>(Resource.Id.imageView1);
Bitmap bitmap = Bitmap.CreateBitmap(500, 500, Bitmap.Config.Rgb565);
Paint paint = new Paint();
paint.SetARGB(255, 255, 0, 0);
Canvas canvas = new Canvas(bitmap);
//Draw the image bitmap into the canvas
canvas.DrawBitmap(bitmap, 5, 5, paint);
//Draw everything you want into the canvas
canvas.DrawCircle(50, 50, 10, paint);
//Attach the canvas to the ImageView
map.SetImageDrawable((new BitmapDrawable(bitmap)));
Button item = FindViewById<Button>(Resource.Id.button1); //Declare item button
item.Click += delegate
{
StartActivity(typeof(Item));
};
}
}
有没有人知道问题是什么?