Android:如果将 Activity 带回屏幕，则通知中的 PendingIntent 不会触发 onCreate() [英] Android: PendingIntent from Notification doesn't trigger the onCreate() if bringing Activity back on Screen

问题描述

我猜我对 Intent Flags 有一些误解.我想要做的是，我有一个广播流应用程序，它有两个活动(PlayerApplication 和 SettingsScreen).我有一个在后台运行的用于流式处理的 Service.class，它也包含一个通知(您可以在通知覆盖菜单和 PlayerApplication 中停止/开始播放).如果用户点击通知，PlayerApplicationActivity 应该回到屏幕.

guess I'm having some misunderstandigs with the Intent Flags.. What I'm trying to do is, I'm having a radio streaming applications, which has two Activities (PlayerApplication and SettingsScreen). I have a Service.class for Streaming which runs in the background, which holds a Notification as well (you can stop/start playback in the notification-overlay menu and the PlayerApplication). If the User clicks on the Notification, the PlayerApplicationActivity should be com back to screen.

一切正常，期待以下情况:用户打开 SettingsScreenActivity -> 打开 NotificationOverlayMenu -> 点击 Notification -> PendingIntent 恢复到 PlayerApplicationActivity

Everything works fine, expect the case: User opens SettingsScreenActivity -> opens NotificationOverlayMenu -> clicks at Notification -> PendingIntent resumes to PlayerApplicationActivity

现在，PlayerApplicationScreen 在那里，但我无法点击任何东西.我看到，如果我从通知中恢复，则不会触发我的 PlayerApplication 的 onCreate().但是布局看起来不错(也在 onCreate() 中膨胀了)

Now, PlayerApplicationScreen is there, but I cannot click anything. I see, that the onCreate() of my PlayerApplication isn't triggered, if I resume from Notification. But the layout looks fine (also inflated in the onCreate())

我在 Service.class 中使用了以下 PendingIntent:

I used following PendingIntent in the Service.class:

PendingIntent contentIntent = PendingIntent.getActivity(
      this.getApplicationContext(), //Service.class
      0, 
      new Intent(this,PlayerApplicationActivity.class)
             .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
                | Intent.FLAG_ACTIVITY_SINGLE_TOP),
      0);

所以实际上 PendingIntent 应该将 Activity(如果已经运行)带回到顶部.我是使用了错误的 Intent 还是我错过了一点?

So actually the PendingIntent should bring the Activity (if already running) back to the top. Am I using wrong Intents or am I missing a point?

我在 Manifest.xml 中声明了 launchMode

and I declared launchMode in Manifest.xml

android:launchMode="singleTask"

推荐答案

我刚刚发现我做错了什么:

I just figured out what I was doing wrong:

1. 为了我的目的，我使用了错误的启动模式.正确的是 singleTop 不是 singleTask

我在 而不是

//Manifest.xml
<activity
    android:name="..."
    android:launchMode="singleTop" >

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