/// <summary>Gets the activity or application icon for an activity.</summary>
/// <remarks>
/// Gets the activity or application icon for an activity.
/// Uses the local icon cache for fast repeated lookups.
/// </remarks>
/// <param name="component">Name of an activity.</param>
/// <returns>
/// A drawable, or
/// <code>null</code>
/// if neither the activity nor the application
/// has an icon set.
/// </returns>
private android.graphics.drawable.Drawable getActivityIconWithCache(android.content.ComponentName
component)
{
// First check the icon cache
string componentIconKey = component.flattenToShortString();
// Using containsKey() since we also store null values.
if (mOutsideDrawablesCache.containsKey(componentIconKey))
{
android.graphics.drawable.Drawable.ConstantState cached = mOutsideDrawablesCache.
get(componentIconKey);
return(cached == null ? null : cached.newDrawable(mProviderContext.getResources()
));
}
// Then try the activity or application icon
android.graphics.drawable.Drawable drawable = getActivityIcon(component);
// Stick it in the cache so we don't do this lookup again.
android.graphics.drawable.Drawable.ConstantState toCache = drawable == null ? null
: drawable.getConstantState();
mOutsideDrawablesCache.put(componentIconKey, toCache);
return(drawable);
}
/// <summary>Gets the activity or application icon for an activity.</summary>
/// <remarks>Gets the activity or application icon for an activity.</remarks>
/// <param name="component">Name of an activity.</param>
/// <returns>
/// A drawable, or
/// <code>null</code>
/// if neither the acitivy or the application
/// have an icon set.
/// </returns>
private android.graphics.drawable.Drawable getActivityIcon(android.content.ComponentName
component)
{
android.content.pm.PackageManager pm = mContext.getPackageManager();
android.content.pm.ActivityInfo activityInfo;
try
{
activityInfo = pm.getActivityInfo(component, android.content.pm.PackageManager.GET_META_DATA
);
}
catch (android.content.pm.PackageManager.NameNotFoundException ex)
{
android.util.Log.w(LOG_TAG, ex.ToString());
return(null);
}
int iconId = activityInfo.getIconResource();
if (iconId == 0)
{
return(null);
}
string pkg = component.getPackageName();
android.graphics.drawable.Drawable drawable = pm.getDrawable(pkg, iconId, activityInfo
.applicationInfo);
if (drawable == null)
{
android.util.Log.w(LOG_TAG, "Invalid icon resource " + iconId + " for " + component
.flattenToShortString());
return(null);
}
return(drawable);
}
