我可以找到一种方法将参数从我的通知发送到我的活动。

I have a service that creates a notification. When the user clicks on the notification I want to open my main activity with some special parameters. E.g an item id, so my activity can load and present a special item detail view. More specific, I'm downloading a file, and when the file is downloaded I want the notification to have an intent that when clicked it opens my activity in a special mode. I have tried to use putExtra on my intent, but cant seem to extract it, so I think I'm doing it wrong.

我的服务中创建通知的代码:

        // construct the Notification object.
     final Notification notif = new Notification(R.drawable.icon, tickerText, System.currentTimeMillis());


    final RemoteViews contentView = new RemoteViews(context.getPackageName(), R.layout.custom_notification_layout);
    contentView.setImageViewResource(R.id.image, R.drawable.icon);
    contentView.setTextViewText(R.id.text, tickerText);
    contentView.setProgressBar(R.id.progress,100,0, false);
    notif.contentView = contentView;        

    Intent notificationIntent = new Intent(context, Main.class);
    notificationIntent.putExtra("item_id", "1001"); // <-- HERE I PUT THE EXTRA VALUE
    PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
    notif.contentIntent = contentIntent;

    nm.notify(id, notif);

从我的活动中试图从通知中获取额外参数的代码:

 public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);


    Bundle extras = getIntent().getExtras();
    if(extras != null){
        Log.i( "dd","Extra:" + extras.getString("item_id") );
    }

额外的总是空的,我从来没有得到任何东西到我的日志。

顺便说一句……onCreate只在我的活动开始时运行,如果我的活动已经开始,我也想收集额外的内容,并根据我收到的item_id呈现我的活动。

什么好主意吗?


当前回答

在做了一些搜索之后,我从android开发者指南中得到了解决方案

PendingIntent contentIntent ;
Intent intent = new Intent(this,TestActivity.class);
intent.putExtra("extra","Test");
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);

stackBuilder.addParentStack(ArticleDetailedActivity.class);

contentIntent = stackBuilder.getPendingIntent(0,PendingIntent.FLAG_UPDATE_CURRENT);

为了在Test Activity类中获得额外的Intent值,你需要编写以下代码:

 Intent intent = getIntent();
 String extra = intent.getStringExtra("extra") ;

其他回答

看看这个指南(创建通知)和ApiDemos“StatusBarNotifications”和“NotificationDisplay”的示例。

如果活动已经在运行,你有两种方式进行管理:

在启动活动时添加FLAG_ACTIVITY_SINGLE_TOP标志到Intent,然后在活动类中实现onNewIntent(Intent Intent)事件处理程序,这样你就可以访问为活动调用的新意图(这与仅仅调用getIntent()不一样,这将总是返回启动你的活动的第一个Intent。 与第一个相同,但不是在Intent中添加一个标志,你必须在你的活动AndroidManifest.xml中添加“singleTop”。

如果你使用意图附加,记得调用带有PendingIntent标志的PendingIntent. getactivity()。FLAG_UPDATE_CURRENT,否则将为每个通知重用相同的额外内容。

在你的通知实现中,使用这样的代码:

NotificationCompat.Builder nBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
...
Intent intent = new Intent(this, ExampleActivity.class);
intent.putExtra("EXTRA_KEY", "value");

PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
nBuilder.setContentIntent(pendingIntent);
...

要在ExampleActivity中获取Intent额外值,使用以下代码:

...
Intent intent = getIntent();
if(intent!=null) {
    String extraKey = intent.getStringExtra("EXTRA_KEY");
}
...

非常重要的注意:Intent::putExtra()方法是一个重载方法。要获得额外的键,你需要使用Intent::get[Type] extra()方法。

注意:NOTIFICATION_ID和NOTIFICATION_CHANNEL_ID是在ExampleActivity中声明的常量

在阅读了一些电子邮件列表和其他论坛后,我发现这个技巧似乎在意图中添加了一些独特的数据。

是这样的:

   Intent notificationIntent = new Intent(Main.this, Main.class);
   notificationIntent.putExtra("sport_id", "sport"+id);
   notificationIntent.putExtra("game_url", "gameURL"+id);

   notificationIntent.setData((Uri.parse("foobar://"+SystemClock.elapsedRealtime()))); 

我不明白为什么要这样做,这与意图有关,不能仅通过其附加功能来确定…

在做了一些搜索之后,我从android开发者指南中得到了解决方案

PendingIntent contentIntent ;
Intent intent = new Intent(this,TestActivity.class);
intent.putExtra("extra","Test");
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);

stackBuilder.addParentStack(ArticleDetailedActivity.class);

contentIntent = stackBuilder.getPendingIntent(0,PendingIntent.FLAG_UPDATE_CURRENT);

为了在Test Activity类中获得额外的Intent值,你需要编写以下代码:

 Intent intent = getIntent();
 String extra = intent.getStringExtra("extra") ;

G'day, I too can say that I tried everything mentioned in these posts and a few more from elsewhere. The #1 problem for me was that the new Intent always had a null bundle. My issue was in focusing too much on the details of "have I included .this or .that". My solution was in taking a step back from the detail and looking at the overall structure of the notification. When I did that I managed to place the key parts of the code in the correct sequence. So, if you're having similar issues check for:

1. Intent notificationIntent = new Intent(MainActivity.this, NotificationActivity.class);

2a. Bundle bundle = new Bundle();

//我更喜欢指定数据类型。如bundle.putInt

2b. notificationIntent.putExtras(bundle);
3. PendingIntent contentIntent = PendingIntent.getActivity(MainActivity.this, WIZARD_NOTIFICATION_ID, notificationIntent,
                    PendingIntent.FLAG_UPDATE_CURRENT);
notificationIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
4. NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
5.          NotificationCompat.Builder nBuilder =
                    new NotificationCompat.Builder(this)
                            .setSmallIcon(R.drawable.ic_notify)
                            .setContentTitle(title)
                            .setContentText(content)
                            .setContentIntent(contentIntent)
                            .setDefaults(Notification.DEFAULT_SOUND | Notification.DEFAULT_VIBRATE)
                            .setAutoCancel(false)//false is standard. true == automatically removes the notification when the user taps it.
                            .setColor(getResources().getColor(R.color.colorPrimary))
                            .setCategory(Notification.CATEGORY_REMINDER)
                            .setPriority(Notification.PRIORITY_HIGH)
                            .setVisibility(NotificationCompat.VISIBILITY_PUBLIC);
            notificationManager.notify(WIZARD_NOTIFICATION_ID, nBuilder.build());

通过这个序列,我得到了一个有效的bundle。