当显示对话框时执行 animateTo 时，Android 的地图库会抛出 NullPointerException

发布于 2024-09-18 19:54:20 字数 912 浏览 9 评论 0原文

我已经在 runOnFirstFix() 方法上苦苦挣扎了很长一段时间。也许问题出在第一行，上面写着Running deferred on first fix。

问题是，当执行第一个修复并且我在那一刻显示一些对话框时，它经常崩溃。

我从 logcat 中提取了以下内容：

I/Maps.MyLocationOverlay( 2425): Running deferred on first fix: com.MyApp.Map$2@43aef8e8
W/dalvikvm( 2425): threadid=23: thread exiting with uncaught exception (group=0x4001e170)
E/AndroidRuntime( 2425): Uncaught handler: thread Thread-24 exiting due to uncaught exception
E/AndroidRuntime( 2425): java.lang.NullPointerException
E/AndroidRuntime( 2425):  at com.google.android.maps.MapController.animateTo(MapController.java:232)
E/AndroidRuntime( 2425):  at com.google.android.maps.MapController.animateTo(MapController.java:203)
E/AndroidRuntime( 2425):  at com.MyApp.Map$2.run(Map.java:129)
E/AndroidRuntime( 2425):  at java.lang.Thread.run(Thread.java:1096)

我没有找到任何类似的参考内容，这让我怀疑我在非常基本的层面上做错了什么。有人见过这个吗？

原文

I've been struggling with the runOnFirstFix() method for quite a long time. And maybe the problem is in that first line that says Running deferred on first fix.

The thing is, when the first fix gets executed and I am displaying some dialog in that moment, it crashes quite frequently.

I've extracted the following from the logcat:

I/Maps.MyLocationOverlay( 2425): Running deferred on first fix: com.MyApp.Map$2@43aef8e8
W/dalvikvm( 2425): threadid=23: thread exiting with uncaught exception (group=0x4001e170)
E/AndroidRuntime( 2425): Uncaught handler: thread Thread-24 exiting due to uncaught exception
E/AndroidRuntime( 2425): java.lang.NullPointerException
E/AndroidRuntime( 2425):  at com.google.android.maps.MapController.animateTo(MapController.java:232)
E/AndroidRuntime( 2425):  at com.google.android.maps.MapController.animateTo(MapController.java:203)
E/AndroidRuntime( 2425):  at com.MyApp.Map$2.run(Map.java:129)
E/AndroidRuntime( 2425):  at java.lang.Thread.run(Thread.java:1096)

I haven't found any reference to anything similar and that makes me suspect I am doing something wrong in a very basic level. Has anyone seen this before?

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爱的那么颓废 2024-09-25 19:54:21

我基本上有一个带有 MapView 的 MapActivity，并在其上添加了 MyLocationOverlay

//My location overlay
myLocation = new MyLocationOverlay(this, mapView);
myLocation.enableMyLocation();
mapView.getOverlays().add(myLocation);      
myLocation.runOnFirstFix(new Runnable(){


 @Override
   public void run() {
    MapController myController = Map.this.mapView.getController();
                  myController.animateTo(application.myLocation.getMyLocation());
   }
    });

然后，在执行过程中的某个时刻，该活动通过 showDialog(...) 显示一个对话框，并且，如果在“animateTo”方法执行时该对话框仍然显示调用，它崩溃了。

I basically have a MapActivity with a MapView and I add a MyLocationOverlay on it

//My location overlay
myLocation = new MyLocationOverlay(this, mapView);
myLocation.enableMyLocation();
mapView.getOverlays().add(myLocation);      
myLocation.runOnFirstFix(new Runnable(){


 @Override
   public void run() {
    MapController myController = Map.this.mapView.getController();
                  myController.animateTo(application.myLocation.getMyLocation());
   }
    });

Then, at some point in the execution the activity shows a dialog via showDialog(...) and, if the dialog is still showing when the 'animateTo' method is called, it crashes.

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