我的任务是在 Android 地图中显示 458 个标记。为了避免与性能相关的问题,我使用AsyncTask
实例更新地图上的数据。
这是我所做的一个简短的场景。
- 我获取了英国各地 458 个地点的纬度/经度。
- 我运行循环并根据 Android 博客教程将它们添加到
ItemizedOverlay
课堂上 - 在每 50 次迭代后,我调用
publishProgress
方法在地图中放置 50 个标记。
第 50 次迭代后,流程进入onProgressUpdate
via publishProgress
,这是我的onProgressUpdate
方法代码
// MapOverLays = mapView.getOverlays();
//This line was called in asyc task's constructor
// Hello Overlay is an instance of ItemizedOverlay.
mapOverlays.add(helloOverLay);
//MapView.getController - Also called in Constructor
controller.setZoom(12);
controller.animateTo(centerPoint);
controller.setCenter(centerPoint);
此代码抛出ArrayIndexOutOfBoundException
,logcat 不显示我模块中的任何类。如果它详细说明了我的问题,这是 logcat 转储。
12-07 11:34:48.644: ERROR/AndroidRuntime(508): java.lang.ArrayIndexOutOfBoundsException
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.google.android.maps.ItemizedOverlay.getIndexToDraw(ItemizedOverlay.java:211)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.google.android.maps.ItemizedOverlay.draw(ItemizedOverlay.java:240)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.google.android.maps.Overlay.draw(Overlay.java:179)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.google.android.maps.OverlayBundle.draw(OverlayBundle.java:42)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.google.android.maps.MapView.onDraw(MapView.java:476)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.View.draw(View.java:6535)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.drawChild(ViewGroup.java:1531)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.drawChild(ViewGroup.java:1529)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.View.draw(View.java:6538)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.widget.FrameLayout.draw(FrameLayout.java:352)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.drawChild(ViewGroup.java:1531)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.drawChild(ViewGroup.java:1529)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.View.draw(View.java:6538)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.widget.FrameLayout.draw(FrameLayout.java:352)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1830)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewRoot.draw(ViewRoot.java:1349)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewRoot.performTraversals(ViewRoot.java:1114)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewRoot.handleMessage(ViewRoot.java:1633)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.os.Handler.dispatchMessage(Handler.java:99)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.os.Looper.loop(Looper.java:123)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.app.ActivityThread.main(ActivityThread.java:4363)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at java.lang.reflect.Method.invokeNative(Native Method)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at java.lang.reflect.Method.invoke(Method.java:521)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
12-07 11:34:48.644: ERROR/AndroidRuntime(508): at dalvik.system.NativeStart.main(Native Method)
PS 我已经用相对较小 (10) 和相对较大 (150) 的迭代而不是 50 来测试应用程序。但是应用程序会抛出相同的错误。