// ExStart:RenderShapeToGraphics
public static string RenderShapeToGraphics(string dataDir, Shape shape)
{
ShapeRenderer r = shape.GetShapeRenderer();
// Find the size that the shape will be rendered to at the specified scale and resolution.
Size shapeSizeInPixels = r.GetSizeInPixels(1.0f, 96.0f);
// Rotating the shape may result in clipping as the image canvas is too small. Find the longest side
// And make sure that the graphics canvas is large enough to compensate for this.
int maxSide = System.Math.Max(shapeSizeInPixels.Width, shapeSizeInPixels.Height);
using (Android.Graphics.Bitmap bitmap = Android.Graphics.Bitmap.CreateBitmap((int)(maxSide * 1.25),
(int)(maxSide * 1.25),
Android.Graphics.Bitmap.Config.Argb8888))
{
// Rendering to a graphics object means we can specify settings and transformations to be applied to
// The shape that is rendered. In our case we will rotate the rendered shape.
using (Android.Graphics.Canvas gr = new Android.Graphics.Canvas(bitmap))
{
// Clear the shape with the background color of the document.
gr.DrawColor(new Android.Graphics.Color(shape.Document.PageColor.ToArgb()));
// Center the rotation using translation method below
gr.Translate((float)bitmap.Width / 8, (float)bitmap.Height / 2);
// Rotate the image by 45 degrees.
gr.Rotate(45);
// Undo the translation.
gr.Translate(-(float)bitmap.Width / 8, -(float)bitmap.Height / 2);
// Render the shape onto the graphics object.
r.RenderToSize(gr, 0, 0, shapeSizeInPixels.Width, shapeSizeInPixels.Height);
}
// Save output to file.
using (System.IO.FileStream fs = System.IO.File.Create(dataDir + "/RenderToSize_Out.png"))
{
bitmap.Compress(Android.Graphics.Bitmap.CompressFormat.Png, 100, fs);
}
}
return("\nShape rendered to graphics successfully.\nFile saved at " + dataDir);
}
protected override void OnDraw(Android.Graphics.Canvas canvas)
{
base.OnDraw(canvas);
canvas.DrawColor(Colors.White.ToDroid());
using (var ctx = canvas.XwtContext()) {
var p = new ReferencePainter();
p.Font = this.Font;
if (true)
{
p.Figures(ctx, 5, 5);
p.Transforms(ctx, 5, 150);
p.Texts(ctx, 5, 250);
p.PatternsAndImages(ctx, 205, 5);
}
else
{
TestDrawing(ctx, 5, 5);
}
}
}
public void SurfaceCreated(ISurfaceHolder holder)
{
this.holder = holder;
//畫筆定義
Android.Graphics.Paint mpaint = new Android.Graphics.Paint();
mpaint.Color = Android.Graphics.Color.Yellow;
mpaint.SetStyle(Android.Graphics.Paint.Style.Stroke);
mpaint.StrokeWidth = 4f;
//畫布
Android.Graphics.Canvas canvas = holder.LockCanvas();
//清除畫布用
canvas.DrawColor(Android.Graphics.Color.Transparent, Android.Graphics.PorterDuff.Mode.Clear);
// 畫布長寬
var w = sv_rec.Width;
var h = sv_rec.Height;
//控制正方形位置
Android.Graphics.Rect r = new Android.Graphics.Rect((int)w / 16, (int)h / 8, (int)w / 16 + 7 * w / 8, (int)h / 8 + h / 2);
//canvas.DrawRect(r, mpaint); //正方形
//左下框
canvas.DrawRect(r.Left - 2, r.Bottom, r.Left + 50, r.Bottom + 2, mpaint);
canvas.DrawRect(r.Left - 2, r.Bottom - 50, r.Left, r.Bottom, mpaint);
//左上框
canvas.DrawRect(r.Left - 2, r.Top - 2, r.Left + 50, r.Top, mpaint);
canvas.DrawRect(r.Left - 2, r.Top, r.Left, r.Top + 50, mpaint);
//右上框
canvas.DrawRect(r.Right - 50, r.Top - 2, r.Right + 2, r.Top, mpaint);
canvas.DrawRect(r.Right, r.Top, r.Right + 2, r.Top + 50, mpaint);
//右下框
canvas.DrawRect(r.Right - 50, r.Bottom, r.Right + 2, r.Bottom + 2, mpaint);
canvas.DrawRect(r.Right, r.Bottom - 50, r.Right + 2, r.Bottom, mpaint);
holder.UnlockCanvasAndPost(canvas);
}
void ScreenshotTest(object sender,EventArgs EventArgs)
{
Android.Graphics.Bitmap b = Android.Graphics.Bitmap.CreateBitmap(RI.TL.Width,RI.TL.Height,Android.Graphics.Bitmap.Config.Argb8888);
Android.Graphics.Canvas c = new Android.Graphics.Canvas (b);
c.DrawColor (Android.Graphics.Color.White);
RI.TL.Draw(c);
using (System.IO.FileStream fs = new System.IO.FileStream (
"/sdcard/screen.png", System.IO.FileMode.Create)) {
b.Compress (Android.Graphics.Bitmap.CompressFormat.Png, 90, fs);}
var uri = Android.Net.Uri.FromFile (new Java.IO.File("/sdcard/screen.png"));
var email = new Intent (Android.Content.Intent.ActionSend);
email.SetType ("message/rfc822");
email.PutExtra (Android.Content.Intent.ExtraEmail, new string[]{"*****@*****.**"} );
email.PutExtra (Android.Content.Intent.ExtraCc, new string[]{"*****@*****.**"} );
email.PutExtra (Android.Content.Intent.ExtraSubject, "[ModemListe]");
email.PutExtra (Android.Content.Intent.ExtraText, "Hello from Xamarin.Android");
email.PutExtra (Intent.ExtraStream,uri);
StartActivity (Intent.CreateChooser(email,"send"));
}
