Android Phonegap 应用程序 - 将 Activity 放在首位

Question

我正在自学如何在 Android 上使用 Phonegap 通知。虽然显示通知似乎是一个相当简单的过程

public void triggerTestNotification(String tag, int id,Context ctxt) 
{
  Intent notificationIntent = new Intent(context, PallActivity.class);
  notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | 
  Intent.FLAG_ACTIVITY_CLEAR_TOP);

  notificationIntent.setAction(Intent.ACTION_MAIN);
  notificationIntent.addCategory(Intent.CATEGORY_LAUNCHER);

  PendingIntent contentIntent = PendingIntent.getActivity(ctxt, 0,  
  notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

  Notification not = new Notification.Builder(ctxt)
  .setContentTitle("Title").setContentText("Title")
  .setTicker("Tick tock")
  .setAutoCancel(true) 
  .setContentIntent(contentIntent)
  .setSmallIcon(ctxt.getApplicationInfo().icon).build();
   NotificationManager notificationManager = (NotificationManager)    
   ctxt.getSystemService(Context.NOTIFICATION_SERVICE);
   notificationManager.notify(tag, id, not);
 }

我发现比较困难的是以下内容

• 用户启动应用
• 用户离开并开始做其他事情 - 应用在后台运行
• 收到通知
• 显示
• 用户点击通知。

此时应用程序应该回到前台。我以为我的 Intent 代码

public class PallActivity extends Activity
{
  @Override
  public void onCreate(Bundle savedInstanceState)
  {
   super.onCreate(savedInstanceState);
  finish();
  forceMainActivityReload();
 }

 private void forceMainActivityReload()
 {
  PackageManager pm = getPackageManager();
  Intent launchIntent =    
  pm.getLaunchIntentForPackage(getApplicationContext().getPackageName());           
  startActivity(launchIntent);
 }

 @Override
 protected void onResume() 
 {
  super.onResume();
  final NotificationManager notificationManager = (NotificationManager) 
  this.getSystemService(Context.NOTIFICATION_SERVICE);
  notificationManager.cancelAll();
 }

}

会处理这个，但它什么都不做。显然，我在这里弄错了——也许是在 Intent 标志中。如果有人能帮助我走上正轨，我将不胜感激

Answer 1

从您的 oncreate 中删除 finish();，它会在您继续任何操作之前调用 finish。

不是启动 PallActivity，似乎您打算启动第二个 Activity 或至少将 PallActivity 视为第二个 Activity 。您不需要像在 forceMainActivityReload(); 中那样启动它。我将从通知 Intent 开始您希望开始的 Activity ，而不是让它变得更加复杂和混淆问题。

notification.flags = Notification.FLAG_ONGOING_EVENT | Notification.FLAG_NO_CLEAR;   
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);

确保您使用的上下文是:

Context context = getApplicationContext();

并且，如评论中所述，从通知中删除这些内容:

notificationIntent.setAction(Intent.ACTION_MAIN);
notificationIntent.addCategory(Intent.CATEGORY_LAUNCHER);

如果需要，这里有更多详细信息:

Resume an activity when clicked on a notification

Android: How to resume an App from a Notification?

resuming an activity from a notification

Notification Resume Activity

Intent to resume a previously paused activity (Called from a Notification)

Android: resume app from previous position

How to make notification intent resume rather than making a new intent?