我有类似的问题，我的应用程序显示消息通知。 当有多个通知并单击每个通知时，它将在视图消息活动中显示该通知详细信息。我解决了相同的额外参数正在接收的问题，在查看消息的意图。

下面是修复这个问题的代码。 创建通知Intent的代码。

 Intent notificationIntent = new Intent(getApplicationContext(), viewmessage.class);
    notificationIntent.putExtra("NotificationMessage", notificationMessage);
    notificationIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendingNotificationIntent = PendingIntent.getActivity(getApplicationContext(),notificationIndex,notificationIntent,PendingIntent.FLAG_UPDATE_CURRENT);
    notification.flags |= Notification.FLAG_AUTO_CANCEL;
    notification.setLatestEventInfo(getApplicationContext(), notificationTitle, notificationMessage, pendingNotificationIntent);

查看消息活动的代码。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    onNewIntent(getIntent());
}

@Override
public void onNewIntent(Intent intent){
    Bundle extras = intent.getExtras();
    if(extras != null){
        if(extras.containsKey("NotificationMessage"))
        {
            setContentView(R.layout.viewmain);
            // extract the extra-data in the Notification
            String msg = extras.getString("NotificationMessage");
            txtView = (TextView) findViewById(R.id.txtMessage);
            txtView.setText(msg);
        }
    }


}

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。

这很简单，这是我使用对象的解决方案!

我的波乔

public class Person implements Serializable{

    private String name;
    private int age;

    //get & set

}

方法通知

  Person person = new Person();
  person.setName("david hackro");
  person.setAge(10);

    Intent notificationIntent = new Intent(this, Person.class);
    notificationIntent.putExtra("person",person);
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);

NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.notification_icon)
                .setAutoCancel(true)
                .setColor(getResources().getColor(R.color.ColorTipografiaAdeudos))
                .setPriority(2)
                .setLargeIcon(bm)
                .setTicker(fotomulta.getTitle())
                .setContentText(fotomulta.getMessage())
                .setContentIntent(PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT))
                .setWhen(System.currentTimeMillis())
                .setContentTitle(fotomulta.getTicketText())
                .setDefaults(Notification.DEFAULT_ALL);

新活动

 private Person person;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_notification_push);
    person = (Person) getIntent().getSerializableExtra("person");
}

祝你好运! !

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。

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") ;

AndroidManifest.xml

包括启动模式=“单顶”

<activity android:name=".MessagesDetailsActivity"
        android:launchMode="singleTop"
        android:excludeFromRecents="true"
        />

SMSReceiver.java

设置Intent和PendingIntent的标志

Intent intent = new Intent(context, MessagesDetailsActivity.class);
    intent.putExtra("smsMsg", smsObject.getMsg());
    intent.putExtra("smsAddress", smsObject.getAddress());
    intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);

    PendingIntent contentIntent = PendingIntent.getActivity(context, notification_id, intent, PendingIntent.FLAG_UPDATE_CURRENT);

MessageDetailsActivity.java

onResume() -每次都被调用，加载额外的内容。

Intent intent = getIntent();
    String extraAddress = intent.getStringExtra("smsAddress");
    String extraBody = intent.getStringExtra("smsMsg");

希望它能有所帮助，这是基于stackoverflow上的其他答案，但这是对我来说最有效的更新。