private static bool TryGetRuntimeInfoValue <T>(RuntimeInfoKey key, out T value)
{
value = default(T);
if (!RuntimeInfo.Is <T>(key))
{
Log.Error(InformationErrorFactory.LogTag, "Invalid return type");
return(false);
}
return(RuntimeInfo.TryGetValue <T>(key, out value));
}
/// <summary>
/// Unregisters a change event callback for given runtime feature key.
/// </summary>
/// <remarks>
/// This function is only for runtime feature.
/// </remarks>
/// <since_tizen> 4 </since_tizen>
/// <param name="key">The name of runtime feature which wants to unregister callback.</param>
/// <param name="callback">The callback function to unsubscribe.</param>
/// <exception cref="ArgumentException">Thrown when the <paramref name="key"/> is invalid.</exception>
/// <exception cref="NotSupportedException">Thrown when the feature related <paramref name="key"/> is not supported.</exception>
public static void UnsetCallback(string key, EventHandler <RuntimeFeatureStatusChangedEventArgs> callback)
{
RuntimeInfoKey runtimeFeature;
if (!ConvertStringToRuntimeInfoKey(key, out runtimeFeature))
{
Log.Error(InformationErrorFactory.LogTag, "Invalid key");
InformationErrorFactory.ThrowException(InformationError.InvalidParameter);
}
RuntimeInfo.UnsetCallback(runtimeFeature, callback);
}