简历singleTask活动 [英] Resume singleTask activity

问题描述

我想恢复单任务活动，这样当用户单击我的通知出现在前台。 （同样的行为，如果用户拍了拍从应用程序菜单中的应用程序图标。）

I am trying to "resume" a single task activity so it appears in the foreground when a user clicks my notification. (Same behavior as if the user tapped on the app icon from the applications menu.)

我的通知，其创建播放由我的广播接收器接收到一个动作的PendingIntent。如果应用程序是不是在前台，我试图恢复应用程序。此外，我试图通过意图传递消息给我的onResume功能。不过，我打了一个错误：

My notification creates a PendingIntent which broadcasts an action that is received by my broadcast receiver. If the app is in not in the foreground, I try to resume the app. Additionally, I'm trying to pass a message to my onResume function through the intent. However, I'm hitting an error:

Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?

尽管这样的错误，我的应用程序正在恢复......不明白为什么。然而，我的演员不会被传递给我的onResume功能。

Despite this error, my app is being resumed...don't understand why. However, my extras are not being passed to my onResume function.

首先，我创建一个通知。

So first I create a notification.

public static class MyNotificationCreator {

  private static final int MY_NOTIFICATION_ID = 987;

  public static void createNotification(Context context) {
    Intent openAppIntent = new Intent(context, MyReceiver.class);
    openAppIntent.setAction("PleaseOpenApp");
    PendingIntent pi = PendingIntent.getBroadcast(context, /*requestCode*/0, openAppIntent, /*flags*/0);

    Notification notification = ne Notification.Builder(context)
      .setContentTitle("")
      .setContentText("Open app")
      .setSmallIcon(context.getApplicationInfo().icon)
      .setContentIntent(pi)
      .build();

    NotificationManager notificationManager = (NotificationManager) applicationContext.getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager.notify(MY_NOTIFICATION_ID, notification);  }
}

将广播PleaseOpenApp为MyReceiver。

Which broadcasts "PleaseOpenApp" for MyReceiver.

public class MyReceiver extends BroadcastReceiver {
  @Override
  public void onRecieve(Context context, Intent intent) {
    if (intent.action() == "PleaseOpenApp" && !MyPlugin.isForeground) {
      PackageManager pm = context.getPackageManager();
      //Perhaps I'm not supposed to use a "launch" intent?
      Intent launchIntent = pm.getLaunchIntentForPackage(context.getPackageName());
      //I'm adding the FLAG_ACTIVITY_NEW_TASK, but I'm still hitting an error saying my intent does not have the FLAG_ACTIVITY_NEW_TASK...
      launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
      launchIntent.putExtra("foo", "bar");
      context.startActivity(launchActivity);
    } else {
      //do other stuff
    }
  }
}

我的插件跟踪我们与否是在前台。此外，它试图让食我的接收器将尝试启动应用程序后。

My plugin keeps track of whether or not we're in the foreground. Also, it tries to get "food" after my receiver attempts to start the app.

public class MyPlugin extends CordovaPlugin {

  public static boolean isForeground = false;

  @Override
  public void initialize(CordovaInterface cordova, CordovaWebView webview) {
    super.initialize(cordova, webview);
    isForeground = true;
  }

  @Override
  public void onResume(boolean multitasking) {
    isForeground = true;
    String foo = activity.getIntent().getStringExtra("foo");
    Log.d("MyPlugin", foo); //foo is null after clicking the notification!
  }

  @Override
  public void onPause(boolean multitasking) {
    isForeground = false;
  }

  @Override
  public void onDestroy() {
    isForeground = false;
  }
}

的注：因为我使用我的科尔多瓦活动有一个singleTask launchMode 的

的另外，我是新来的Andr​​oid发展，使有关没有在前台VS恢复活动已遭到破坏，有关我不理解是$ AP一般概念/最佳实践信息恢复活动的任何帮助p $ pciated！的

推荐答案

我不认为你的广播/广播接收模式是必要的。

I don't think your Broadcast/Broadcast Receiver pattern is necessary.

意图可以用来直接启动一个活动，当你建立了意向，可以添加其它功能。然后，你的活动onResume（）可直接提取它们。

Intents can be used to directly launch an activity, and when you build the Intent, you can add the extras. Then, your activity onResume() can extract them directly.

下面是一个简单的意向和建设的PendingIntent可在通知发出：

Here is a sample Intent and PendingIntent construction that can be sent in a notification:

Intent startActivity = new Intent(context, MyActivity.class);
// You can experiment with the FLAGs passed here to see what they change
startActivity.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_NEW_TASK)
                    .putExtra("Extra1", myExtra1)
                    .putExtra("Extra2", myExtra2)
                    // ADDING THIS MAKES SURE THE EXTRAS ATTACH
                    .setAction("SomeString"); 

// Then, create the PendingIntent
// You can experiment with the FLAG passed here to see what it changes
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, startActivity, PendingIntent.FLAG_UPDATE_CURRENT);

// Then, create and show the notification
Notification notif = new NotificationCompat.Builder(context)
            .setSmallIcon(R.drawable.my_small_icon)
            .setContentTitle(myTitle)
            .setContentText(myContent)
            .setOngoing(isOngoingNotif)
            .setAutoCancel(shouldAutoCancel)
            .setOnlyAlertOnce(shouldAlertOnce)
            .setContentIntent(pendingIntent)
            .build();

NotificationManagerCompat manager = NotificationManagerCompat.from(context);
manager.notify(MY_NOTIFICATION_ID, notif);

这篇关于简历singleTask活动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！