public static string GetAttributeValue(Android.Content.Res.Resources.Theme theme, int resId)
{
TypedValue typedValue = new TypedValue();
theme.ResolveAttribute(resId, typedValue, true);
return(typedValue.CoerceToString());
}
/// <summary>
/// Retrieves a 32-bit integer color value from the specified resource ID
/// </summary>
/// <returns>The specified resource ID's color value if found, the specified default value if not found</returns>
/// <param name="context">The <see cref="T:Android.Content.Context"/> context to be used for the retrieval</param>
/// <param name="resourceId">The resource ID to retrieve the value for</param>
/// <param name="defaultValue">The default color value to return if the specified resource ID isn't found</param>
public static int ColorFromResourceId(Context context, int resourceId, int defaultValue)
{
int result = defaultValue;
if (typedVal == null)
{
typedVal = new TypedValue();
}
try
{
Android.Content.Res.Resources.Theme theme = context.Theme;
if (theme != null && theme.ResolveAttribute(resourceId, typedVal, true))
{
if (typedVal.Type >= DataType.FirstInt && typedVal.Type <= DataType.LastInt)
{
result = typedVal.Data;
}
else if (typedVal.Type == DataType.String)
{
result = ContextCompat.GetColor(context, typedVal.ResourceId);
}
}
}
#pragma warning disable RECS0022 // A catch clause that catches System.Exception and has an empty body
catch (Exception) { }
#pragma warning restore RECS0022 // A catch clause that catches System.Exception and has an empty body
return(result);
}
internal static string PullFontPathFromTheme(Context context, int styleAttrId, int[] attributeId)
{
if (styleAttrId == -1 || attributeId == null)
{
return(null);
}
Android.Content.Res.Resources.Theme theme = context.Theme;
var value = new TypedValue();
theme.ResolveAttribute(styleAttrId, value, true);
TypedArray typedArray = theme.ObtainStyledAttributes(value.ResourceId, attributeId);
try
{
string font = typedArray.GetString(0);
return(font);
}
catch (Exception)
{
//failed for some reason
return(null);
}
finally
{
typedArray.Recycle();
}
}
/// <summary>
/// Last but not least, try to pull the Font Path from the Theme, which is defined.
/// </summary>
/// <returns>null if no theme or attribute defined.</returns>
/// <param name="context">Activity Context.</param>
/// <param name="styleAttrId">Theme style id.</param>
/// <param name="subStyleAttrId">the sub style from the theme to look up after the first style.</param>
/// <param name="attributeId">if -1 returns null.</param>
internal static string PullFontPathFromTheme(Context context, int styleAttrId, int subStyleAttrId, int[] attributeId)
{
if (styleAttrId == -1 || attributeId == null)
{
return(null);
}
Android.Content.Res.Resources.Theme theme = context.Theme;
var value = new TypedValue();
theme.ResolveAttribute(styleAttrId, value, true);
int subStyleResId = -1;
TypedArray parentTypedArray = theme.ObtainStyledAttributes(value.ResourceId, new int[] { subStyleAttrId });
try
{
subStyleResId = parentTypedArray.GetResourceId(0, -1);
}
catch (Exception)
{
// Failed for some reason.
return(null);
}
finally
{
parentTypedArray.Recycle();
}
if (subStyleResId == -1)
{
return(null);
}
TypedArray subTypedArray = context.ObtainStyledAttributes(subStyleResId, attributeId);
if (subTypedArray != null)
{
try
{
return(subTypedArray.GetString(0));
}
catch (Exception)
{
// Failed for some reason.
return(null);
}
finally
{
subTypedArray.Recycle();
}
}
return(null);
}
