我们正在尝试跟踪我们的Android应用程序中GoogleMap上发生的内存泄漏，大约在40-50次设备旋转后会导致OOM。地图上设置了约3500个标记。
该应用程序具有minSDK 9，并因此使用来自V4支持库的SupportMapFragment。
我们尝试了多种方法，包括：
- 缓存LatLng - 缓存CameraUpdates - 从地图中删除标记 - 从地图中删除侦听器 - 删除所有侦听器、标记等，以便我们只有一个简单的地图 - 更新Google Play服务库 - 更新支持库
在MAT中分析内存转储显示，我们积累了许多实例 com.google.android.gms.location.internal.LocationClientHelper$ListenerTransport 我们不知道它们来自哪里。
有人知道这个内存泄漏的原因吗？
以下代码已经删除了所有标记和侦听器，但仍然存在泄漏。首先是基类：
该应用程序具有minSDK 9，并因此使用来自V4支持库的SupportMapFragment。
我们尝试了多种方法，包括：
- 缓存LatLng - 缓存CameraUpdates - 从地图中删除标记 - 从地图中删除侦听器 - 删除所有侦听器、标记等，以便我们只有一个简单的地图 - 更新Google Play服务库 - 更新支持库
在MAT中分析内存转储显示，我们积累了许多实例 com.google.android.gms.location.internal.LocationClientHelper$ListenerTransport 我们不知道它们来自哪里。
有人知道这个内存泄漏的原因吗？
以下代码已经删除了所有标记和侦听器，但仍然存在泄漏。首先是基类：
public abstract class BaseMapFragment extends Fragment {
public static final int MENU_ITEM_ID_SEARCH= 102;
public static final int MENU_ITEM_ID_SHOW_LIST= 100;
public static final int ZOOM_LEVEL_DEFAULT= 14;
private static final String SAVED_INSTANCE_LATITUDE= "savedLatitude";
private static final String SAVED_INSTANCE_LONGITUDE= "savedLongitutde";
private static final String SAVED_INSTANCE_ZOOM= "savedZoom";
protected static final String CLASSTAG= BaseMapFragment.class.getSimpleName();
private GoogleMap mMap;
private CameraUpdate mResumeCameraUpdate= null;
private double mSavedLatitude;
private double mSavedLongitude;
private float mSavedZoom;
private static View mView;
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
if (mMap != null) {
outState.putDouble(SAVED_INSTANCE_LATITUDE, mMap.getCameraPosition().target.latitude);
outState.putDouble(SAVED_INSTANCE_LONGITUDE, mMap.getCameraPosition().target.longitude);
outState.putFloat(SAVED_INSTANCE_ZOOM, mMap.getCameraPosition().zoom);
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
if (savedInstanceState != null) {
mSavedLatitude= savedInstanceState.getDouble(SAVED_INSTANCE_LATITUDE, Constants.EXTRA_VALUE_NONE);
mSavedLongitude= savedInstanceState.getDouble(SAVED_INSTANCE_LONGITUDE, Constants.EXTRA_VALUE_NONE);
mSavedZoom= savedInstanceState.getFloat(SAVED_INSTANCE_ZOOM, Constants.EXTRA_VALUE_NONE);
}
if (mView != null) {
ViewGroup parent= (ViewGroup) mView.getParent();
if (parent != null)
parent.removeView(mView);
}
try {
mView= inflater.inflate(R.layout.map_layout, container, false);
} catch (InflateException e) {
/* map is already there, just return view as it is */
}
return mView;
}
protected GoogleMap initializeMap() {
if (mMap != null) {
if (mSavedLatitude != Constants.EXTRA_VALUE_NONE && mSavedLatitude != 0.0) {
mResumeCameraUpdate= Context.getCamUpdate(mSavedZoom, mSavedLatitude, mSavedLongitude);
} else {
mResumeCameraUpdate= Context.getCamUpdate(mMap.getCameraPosition().zoom, mMap.getCameraPosition().target.latitude, mMap.getCameraPosition().target.longitude);
}
}
SupportMapFragment mapFragment= (SupportMapFragment) getActivity().getSupportFragmentManager().findFragmentById(R.id.map);
if (mapFragment == null) {
mapFragment= (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.map);
if (mapFragment == null) {
MapsInitializer.initialize(getActivity());
mapFragment= SupportMapFragment.newInstance();
mMap= mapFragment.getMap();
} else {
mMap= mapFragment.getMap();
}
} else {
mMap= mapFragment.getMap();
}
// check if map is created successfully or not
if (mMap == null) {
Toast.makeText(getActivity().getApplicationContext(), R.string.map_create_unable, Toast.LENGTH_SHORT).show();
} else {
mMap.setMyLocationEnabled(true);
mMap.setOnMyLocationButtonClickListener(new OnMyLocationButtonClickListener() {
@Override
public boolean onMyLocationButtonClick() {
if (mMap.getMyLocation() != null) {
CameraUpdate newLatLngZoom= Context.getCamUpdate(ZOOM_LEVEL_DEFAULT, mMap.getMyLocation());
mMap.animateCamera(newLatLngZoom);
} else {
Toast.makeText(getActivity().getApplicationContext(), R.string.map_location_services_disabled, Toast.LENGTH_SHORT).show();
}
return true;
}
});
}
return mMap;
}
}
子类
public class MySupportMapFragment extends BaseMapFragment {
private LinearLayout mStaoButtonsLayout;
private ToggleButton mStaoButton;
private ToggleButton mGasStaoButton;
private Boolean mInitialLocationChange;
private CameraUpdate mResumeCameraUpdate;
private GoogleMap mMap;
private double mBundleLatitude;
private double mBundleLongitude;
@Override
public void addRequiredModelClasses(LinkedHashSet<Class<? extends ComergeModel<?>>> set) {
set.add(AboModel.class);
set.add(StationModel.class);
super.addRequiredModelClasses(set);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putDouble(BUNDLE_EXTRA_CENTER_LATITUDE, mBundleLatitude);
outState.putDouble(BUNDLE_EXTRA_CENTER_LONGITUDE, mBundleLongitude);
}
@Override
public void onActivityCreated(final Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setHasOptionsMenu(showSearchButton());
final StationModel stationModel= getContext().getModel(StationModel.class);
mStaoButtonsLayout= (LinearLayout) getActivity().findViewById(R.id.mapStaoButtons);
mStaoButtonsLayout.setVisibility(View.VISIBLE);
mStaoButton= (ToggleButton) mStaoButtonsLayout.findViewById(R.id.staoButton);
mStaoButton.setChecked(stationModel.isStationButtonChecked());
mGasStaoButton= (ToggleButton) mStaoButtonsLayout.findViewById(R.id.gasStaoButton);
mGasStaoButton.setChecked(stationModel.isGasStationButtonChecked());
mMap= initializeMap();
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
addSearchButton(menu);
}
}