本文整理汇总了C#中Android.Graphics.Paint.SetAlpha方法的典型用法代码示例。如果您正苦于以下问题：C# Paint.SetAlpha方法的具体用法？C# Paint.SetAlpha怎么用？C# Paint.SetAlpha使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Android.Graphics.Paint的用法示例。
在下文中一共展示了Paint.SetAlpha方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: DoDraw
private void DoDraw(Canvas canvas)
{
// Increment / reset
size += delta;
if (size > 250)
{
delta = -1;
}
else if (size < 30)
{
delta = 1;
}
// Set background color
canvas.DrawColor(Color.BLUE);
var paint = new Paint();
paint.SetTextAlign(Paint.Align.CENTER);
// Draw some lines
canvas.DrawLine(mX, mY, mY + 33, mX + 100, paint);
paint.SetColor(Color.RED);
paint.SetStrokeWidth(10);
canvas.DrawLine(87, 0, 75, 100, paint);
paint.SetColor(Color.GREEN);
paint.SetStrokeWidth(5);
for (int y = 30, alpha = 128; alpha > 2; alpha >>= 1, y += 10)
{
paint.SetAlpha(alpha);
canvas.DrawLine(mY, y, mY + 100, y, paint);
}
// Draw a red rectangle
paint.SetColor(Color.RED);
var rect = new Rect();
rect.Set(size + 120, 130, size + 156, 156);
canvas.DrawRect(rect, paint);
// Draw a circle
paint.SetColor(Color.ParseColor("#ffd700"));
canvas.DrawCircle(size * 2, 220, 30, paint); //faster circle
// Draw red'ish rectangle
paint.SetColor(Color.Rgb(128, 20, 20));
canvas.DrawRect(size, 67, 68, 45, paint);
// Draw green circle
paint.SetColor(Color.GREEN);
canvas.DrawCircle(size, 140.0f - size / 3, 45.0f, paint); //move circle across screen
paint.SetColor(Color.RED);
canvas.DrawText("Dot42", size, 140.0f - size / 3, paint);
// Draw magenta circle
paint.SetColor(Color.MAGENTA);
canvas.DrawCircle(mX, mY, size / 4.0f, paint); //move circle down screen
paint.SetColor(Color.GREEN);
canvas.DrawText("is", mX, mY, paint);
// Draw yellow rectangle
paint.SetAlpha(64);
paint.SetColor(Color.YELLOW);
canvas.DrawRect(size, size, size + 45, size + 45, paint);
// Draw text on rectangle
paint.SetAlpha(255);
paint.SetColor(Color.DKGRAY);
canvas.DrawText("fun!", size + 45 / 2, size + 45 / 2, paint);
}