/// <summary>
/// 在将要挂起应用程序执行时调用。 将保存应用程序状态
/// 将被终止还是恢复的情况下保存应用程序状态，
/// 并让内存内容保持不变。
/// </summary>
/// <param name="sender">挂起的请求的源。</param>
/// <param name="e">有关挂起的请求的详细信息。</param>
private void OnSuspending(object sender, SuspendingEventArgs e)
{
Frame root = Window.Current.Content as Frame;
if (root != null)
{
#if WINDOWS_PHONE_APP
if (root.Content is AudioPlay)
{
AudioPlay mp = root.Content as AudioPlay;
mp.App_Suspending();
}
#endif
}
var deferral = e.SuspendingOperation.GetDeferral();
// TODO: 保存应用程序状态并停止任何后台活动
deferral.Complete();
}
private void App_Resuming(object sender, object e)
{
Frame root = Window.Current.Content as Frame;
if (root != null)
{
#if WINDOWS_PHONE_APP
if (root.Content is AudioMainPage)
{
AudioMainPage mp = root.Content as AudioMainPage;
mp.App_Resuming();
}
if (root.Content is AudioPlay)
{
AudioPlay mp = root.Content as AudioPlay;
mp.App_Resuming();
}
#endif
}
}