问题描述
我想创建类似的东西因为看到这个图片:
我设法创建SpannableStringBuilder evertyhing,除了橙色的圆角矩形。我可以设置背景与BackgroundColorSpan的颜色,但我不能找到一种方法,使四舍五入。任何想法我怎么能做到这一点?
在此先感谢!
编辑:我使用Xamarin.Android,但这里是我的code:
stringBuilder.SetSpan(新BackgroundColorSpan(Application.Context.Resources.GetColor(Resource.Color.orangeColor)),stringBuilder.Length() - 长度,stringBuilder.Length(),SpanTypes .ExclusiveExclusive);
我设法解决我的问题的基础上,pskink的建议。这是我的类:
公共类RoundedBackgroundSpan:ReplacementSpan
{
公众覆盖无效抽奖(画布油画,ICharSequence文字,诠释开始,诠释年底,浮法X,INT顶部,INT Y,INT底部,油漆涂料)
{
VAR RECT =新RectF(X,顶部,X + MeasureText(涂料,文本,开始,结束),底部);
paint.Color = Application.Context.Resources.GetColor(Resource.Color.nextTimeBackgroundColor);
canvas.DrawRoundRect(矩形, Application.Context.Resources.GetDimensionPixelSize(Resource.Dimension.localRouteDetailsRoundRectValue), Application.Context.Resources.GetDimensionPixelSize(Resource.Dimension.localRouteDetailsRoundRectValue),涂料);
paint.Color = Application.Context.Resources.GetColor(Resource.Color.nextTimeTextColor);
canvas.DrawText(文本,开始,结束,X,Y,油漆);
}
公众覆盖INT的getSize(油漆涂料,ICharSequence文字,诠释开始,诠释年底,Paint.FontMetricsInt FM)
{
返回Math.Round(MeasureText(油漆,文本,开始,结束));
}
私人浮动MeasureText(油漆涂料,ICharSequence文字,诠释开始,诠释完)
{
返回paint.MeasureText(文本,开始,结束);
}
}
实例:
VAR的StringBuilder =新SpannableStringBuilder();
VAR stringToAppend =世界你好;
stringBuilder.Append(stringToAppend);
stringBuilder.SetSpan(新RoundedBackgroundSpan(),stringBuilder.Length() - stringToAppend.Length,stringBuilder.Length(),SpanTypes.ExclusiveExclusive);
I would like to create something similar as seen on this image:
I managed to create evertyhing with SpannableStringBuilder, except the orange rounded rectangle. I can set the background to that color with BackgroundColorSpan, but I can't find a way to make it rounded. Any ideas how can I achieve this?
Thanks in advance!
EDIT:I'm using Xamarin.Android, but here is my code:
stringBuilder.SetSpan(new BackgroundColorSpan(Application.Context.Resources.GetColor(Resource.Color.orangeColor)), stringBuilder.Length() - length, stringBuilder.Length(), SpanTypes.ExclusiveExclusive);
I managed to solve my problem, based on pskink's suggestion.Here is my class:
public class RoundedBackgroundSpan : ReplacementSpan
{
public override void Draw(Canvas canvas, ICharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint)
{
var rect = new RectF(x, top, x + MeasureText(paint, text, start, end), bottom);
paint.Color = Application.Context.Resources.GetColor(Resource.Color.nextTimeBackgroundColor);
canvas.DrawRoundRect(rect, Application.Context.Resources.GetDimensionPixelSize(Resource.Dimension.localRouteDetailsRoundRectValue), Application.Context.Resources.GetDimensionPixelSize(Resource.Dimension.localRouteDetailsRoundRectValue), paint);
paint.Color = Application.Context.Resources.GetColor(Resource.Color.nextTimeTextColor);
canvas.DrawText(text, start, end, x, y, paint);
}
public override int GetSize(Paint paint, ICharSequence text, int start, int end, Paint.FontMetricsInt fm)
{
return Math.Round(MeasureText(paint, text, start, end));
}
private float MeasureText(Paint paint, ICharSequence text, int start, int end)
{
return paint.MeasureText(text, start, end);
}
}
Example usage:
var stringBuilder = new SpannableStringBuilder();
var stringToAppend = "hello world";
stringBuilder.Append(stringToAppend);
stringBuilder.SetSpan(new RoundedBackgroundSpan(), stringBuilder.Length() - stringToAppend.Length, stringBuilder.Length(), SpanTypes.ExclusiveExclusive);
这篇关于Android的SpannableString设置背景的背后文本的一部分的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!