Я использую Google API MapView в своем приложении для Android, и я обнаружил, что он часто встречается с этой ошибкой, когда я прокручиваю и увеличиваю карту.Они имеют тенденцию происходить довольно быстро (20 секунд использования карт), поэтому я считаю, что это будет проблемой.Ниже моя трассировка стека.Я занимаюсь разработкой HTC Desire с объемом памяти 24 МБ.
Какие-либо идеи или настройки, которые я могу сделать, чтобы уменьшить частоту этих ошибок?
java.lang.OutOfMemoryError: bitmap size exceeds VM budget
at android.graphics.Bitmap.nativeCreate(Native Method)
at android.graphics.Bitmap.createBitmap(Bitmap.java:574)
at com.google.android.maps.ZoomHelper.createSnapshot(ZoomHelper.java:444)
at com.google.android.maps.ZoomHelper.doZoom(ZoomHelper.java:151)
at com.google.android.maps.ZoomHelper.doZoom(ZoomHelper.java:140)
at com.google.android.maps.MapView.doZoom(MapView.java:1478)
at com.google.android.maps.MapView.doZoom(MapView.java:1487)
at com.google.android.maps.MapView$6.onZoom(MapView.java:1442)
at android.widget.ZoomButtonsController$3.onClick(ZoomButtonsController.java:268)
at android.view.View.performClick(View.java:2408)
at android.view.View$PerformClick.run(View.java:8817)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:144)
at android.app.ActivityThread.main(ActivityThread.java:4937)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
at dalvik.system.NativeStart.main(Native Method)
debug.heap native: allocated 10.63MB of 11.01MB (385.98KB free)
debug.memory: allocated: 17.95MB of 24.00MB (13.50MB free)
Это мое наложение.У меня есть около 50 элементов, отображающих PNG-изображение 96x96 с некоторой прозрачностью (размер файла 6 КБ).
public class StationItemizedOverlay extends ItemizedOverlay<OverlayItem>
{
private ArrayList<OverlayItem> mOverlays = new ArrayList<OverlayItem>();
private ArrayList<Location> locations = new ArrayList<Location>();
private Context mContext;
public StationItemizedOverlay(Drawable defaultMarker, Context context)
{
super(boundCenterBottom(defaultMarker));
this.mContext = context;
}
/**
* Add a range of locations to this overlay
*
* @param locations The locations to add
*/
public void addRange(List<Location> locations)
{
for (Location l : locations)
{
addOne(l);
}
populate();
}
/**
* Add a location to this overlay
*
* @param location The location
*/
public void add(Location location)
{
addOne(location);
populate();
}
/**
* Remove a location from this overlay
* @param location The location to remove
*/
public void remove(Location location)
{
int position = locations.indexOf(location);
if (position >= 0)
{
mOverlays.remove(position);
locations.remove(position);
populate();
}
}
private void addOne(Location location)
{
locations.add(location);
int lat = location.getMicroLatitude();
int lon = location.getMicroLongitude();
GeoPoint point = new GeoPoint(lat, lon);
OverlayItem item = new OverlayItem(point, location.getRealName(), location.getRealName());
mOverlays.add(item);
}
@Override
protected boolean onTap(int index)
{
OverlayItem item = mOverlays.get(index);
AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);
dialog.setTitle(item.getTitle());
dialog.setMessage(item.getSnippet());
dialog.show();
return true;
}
@Override
protected OverlayItem createItem(int i)
{
return mOverlays.get(i);
}
@Override
public int size()
{
return mOverlays.size();
}
}
Это мой MapActivityClass
public class StationFinder extends MapActivity
{
IUIInterface dataInterface = UIInterfaceFactory.getInterface();
MapView mapView;
List<Overlay> mapOverlays;
Drawable drawable;
StationItemizedOverlay trainItemizedOverlay;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.ui_station_finder);
mapView = (MapView) findViewById(R.id.stationFinderUI_mapview);
mapView.setBuiltInZoomControls(true);
mapOverlays = mapView.getOverlays();
drawable = getResources().getDrawable(R.drawable.dash_train_btn_default);
trainItemizedOverlay = new StationItemizedOverlay(drawable, this);
myMapController = mapView.getController();
myMapController.setZoom(8); // zoom level selected from google map .com
// center this location on northern ireland
centerLocation(Settings.getNorthernIrelandCenter().getGeoPoint());
mapOverlays.add(trainItemizedOverlay);
// add data to the adapters only whenever the data is loaded
if (!dataInterface.isDataLoaded())
{
// data is not loaded
// so make a listener for the data loaded event
dataLoadedListener = new IEventListener()
{
public void action(Object optionalData)
{
// the event has been triggered
// register this function to run in the UI thread of the application
runOnUiThread(new Runnable()
{
public void run()
{
dataLoaded();
}
});
}
};
// register the listener for data loaded events
dataInterface.registerDataLoaded(dataLoadedListener);
// call the data loaded function now incase the data has since been loaded by
// the application between registering for the event
if (dataInterface.isDataLoaded())
{
dataLoaded();
}
}
else
{
// data already loaded so run immediately
dataLoaded();
}
}
IEventListener dataLoadedListener = null;
boolean isDataLoaded = false;
private void dataLoaded()
{
// make sure this function is only called once
if (isDataLoaded)
return;
isDataLoaded = true;
// IMPORTANT STUFF GOES HERE
trainItemizedOverlay.addRange(dataInterface.getAllLocations());
// clean up the data load listener
if (dataLoadedListener != null)
{
dataInterface.removeDataLoaded(dataLoadedListener);
dataLoadedListener = null;
}
}
private MapController myMapController;
private void centerLocation(GeoPoint center)
{
myMapController.animateTo(center);
myMapController.setCenter(center);
};
@Override
protected boolean isRouteDisplayed()
{
return false;
}