谷歌地图v2 MapFragment在从后堆栈返回时非常滞后
2022-09-03 02:20:21
我正在开发一个使用v2的应用程序，我遇到了非常奇怪的行为。我创建了一个子类来处理一些自定义行为（处理s，调整菜单选项等），并且在首次加载时，它都可以很好地工作。然后，我将一个新的片段嵌入到我的活动中，将自定义推送到回堆栈上。但是，当我从背包中返回地图时，事情变得很奇怪。平移地图变得非常滞后（我们谈论的是~1 FPS），无论是手动拖动/缩放还是单击图钉引起的动画。然后，如果我与溢出菜单的任何部分进行交互，即使只是打开它并再次关闭它，滞后也会立即清除。似乎没有其他东西可以解决它（除了关闭/重新打开应用程序）;与非溢出菜单项和导航抽屉进行交互没有任何帮助。我从来没有见过这样的东西，也找不到任何以前描述过类似问题的人。欢迎任何想法，建议和/或修复。MapFragmentMapFragmentMarkerMapFragment
在被问到之前，要回答几个问题：
- 是的，我调用了我覆盖的所有生命周期方法的版本（，[我还返回了该方法的超级返回值]，以及）。
superonCreate()onCreateView()onDestroyView() - 据我所知，我正在正确清理地图。每次我刷新图钉时，我都会调用它们中的每一个，然后在地图上调用它们本身，我也在做所有这些操作。
remove()clean()onDestroyView()
最后，作为参考，这是添加新片段的代码：
getFragmentManager().beginTransaction().replace(R.id.main_content_container, new JoinGroupFragment()).addToBackStack(null).commit();
当我完成它时，我只需调用：
getFragmentManager().popBackStack();
编辑：我不确定它会有多大帮助，但这是习惯：MapFragment
public class CustomMapFragment extends MapFragment {
private static final String DIALOG_TAG = "CUSTOM_MAP_FRAGMENT_DIALOG";
private static final int DEFAULT_ZOOM = 14;
private static final int MARKER_ZOOM = 15;
private static final int DEFAULT_PADDING = 80;
private static final int ORANGE_THRESHOLD_MINUTES = 7;
private static final int BLUE_THRESHOLD_MINUTES = 20;
public static final String KEY_GROUP_NAME = "GROUP_NAME";
public static final String KEY_GROUP_ID = "GROUP_ID";
private TextView mGroupNameOverlay;
private GoogleMap mMap;
private ArrayList<Marker> mMarkers;
private Marker mSelectedMarker;
private ArrayList<Group> mAllGroups;
private Group mCurrentGroup;
private ArrayList<Location> mAllLocations;
private boolean mMapReady;
private String mUsername;
private boolean mCenterOnUser;
public CustomMapFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
mMarkers = new ArrayList<>();
mAllLocations = new ArrayList<>();
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
mUsername = prefs.getString(PreferenceUtils.KEY_USERNAME, null);
mCenterOnUser = prefs.getBoolean(PreferenceUtils.KEY_CENTER_ON_ME, false);
mSelectedMarker = null;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
ViewGroup view = (ViewGroup)super.onCreateView(inflater, container, savedInstanceState);
if (view != null) {
// View should never be null; MapFragments have a FrameLayout as their top level parent
mGroupNameOverlay = (TextView)inflater.inflate(R.layout.group_name_overlay, view, false);
view.addView(mGroupNameOverlay);
}
Bundle results = ((MainActivity)getActivity()).getFragmentResults();
if (results != null) {
String name = results.getString(KEY_GROUP_NAME);
String id = results.getString(KEY_GROUP_ID);
if (!StringUtils.isNullOrEmpty(name) && !StringUtils.isNullOrEmpty(id)) {
mCurrentGroup = new Group(name, id);
mAllGroups.add(mCurrentGroup);
}
}
if (mCurrentGroup != null) {
updateGroupNameOverlay(mCurrentGroup.getGroupName());
}
getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() {
@Override
public boolean onMarkerClick(Marker marker) {
mSelectedMarker = marker;
getActivity().invalidateOptionsMenu();
return false;
}
});
mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
@Override
public void onMapClick(LatLng latLng) {
mSelectedMarker = null;
getActivity().invalidateOptionsMenu();
}
});
populateMap(true, false);
}
});
GetGroupsRequest request = new GetGroupsRequest();
request.setListener(new GetGroupsRequestListener());
RequestProcessor.getInstance(getActivity()).queueRequest(request);
return view;
}
@Override
public void onDestroyView() {
mSelectedMarker = null;
for (Marker marker : mMarkers) {
marker.remove();
}
mMarkers.clear();
mMap.clear();
mMap = null;
mMapReady = false;
super.onDestroyView();
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
if (mSelectedMarker == null) {
inflater.inflate(R.menu.menu_map, menu);
}
else {
inflater.inflate(R.menu.menu_marker, menu);
}
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.map_menu_refresh_pins:
performLocationsRequest(false);
return true;
case R.id.map_menu_recenter_zoom:
populateMap(true, true);
return true;
case R.id.map_menu_select_group:
DialogFragment selectDialog = new DialogFragment() {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
String[] groups = new String[mAllGroups.size()];
for (int i = 0; i < groups.length; i++) {
groups[i] = mAllGroups.get(i).getGroupName();
}
return new AlertDialog.Builder(getActivity())
.setItems(groups, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (!mAllGroups.get(which).equals(mCurrentGroup)) {
mCurrentGroup = mAllGroups.get(which);
updateGroupNameOverlay(mCurrentGroup.getGroupName());
performLocationsRequest(true);
}
}
})
.create();
}
};
selectDialog.show(getFragmentManager(), DIALOG_TAG);
return true;
case R.id.map_menu_join_group:
getFragmentManager().beginTransaction().replace(R.id.main_content_container, new JoinGroupFragment()).addToBackStack(null).commit();
return true;
case R.id.map_menu_create_group:
CreateDialogFragment createDialog = new CreateDialogFragment();
createDialog.show(getFragmentManager(), DIALOG_TAG);
return true;
case R.id.map_marker_zoom:
if (mSelectedMarker != null) {
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(mSelectedMarker.getPosition(), MARKER_ZOOM));
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void performLocationsRequest(boolean autoZoom) {
GetLocationsRequest request = new GetLocationsRequest(mCurrentGroup.getGroupId());
request.setListener(new GetLocationsRequestListener(autoZoom));
RequestProcessor.getInstance(getActivity()).queueRequest(request);
}
private void updateGroupNameOverlay(final String groupName) {
if (mGroupNameOverlay != null) {
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
if (groupName == null) {
mGroupNameOverlay.setText(R.string.map_group_overlay_no_group);
}
else {
mGroupNameOverlay.setText(getString(R.string.map_group_overlay_group, groupName));
}
}
});
}
}
private void populateMap(boolean zoom, boolean animate) {
if (!mMapReady) {
mMapReady = true;
}
else {
CameraUpdate update = null;
mSelectedMarker = null;
for (Marker marker : mMarkers) {
marker.remove();
}
mMarkers.clear();
mMap.clear();
if (mAllLocations.size() == 1) {
Location location = mAllLocations.get(0);
mMarkers.add(addMarker(location));
update = CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(), location.getLongitude()), DEFAULT_ZOOM);
}
else if (mAllLocations.size() > 1) {
LatLngBounds.Builder builder = new LatLngBounds.Builder();
for (Location location : mAllLocations) {
mMarkers.add(addMarker(location));
if (mCenterOnUser) {
if (location.getUsername().equals(mUsername)) {
update = CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(), location.getLongitude()), DEFAULT_ZOOM);
}
}
else {
builder.include(new LatLng(location.getLatitude(), location.getLongitude()));
}
}
if (!mCenterOnUser) {
update = CameraUpdateFactory.newLatLngBounds(builder.build(), DEFAULT_PADDING);
}
}
if (update != null && zoom) {
if (animate) {
mMap.animateCamera(update);
}
else {
mMap.moveCamera(update);
}
}
}
}
private Marker addMarker(Location location) {
String timestamp;
long minutesOld = (new Date().getTime() - location.getLastReported()) / 60000;
float hue = BitmapDescriptorFactory.HUE_RED;
if (minutesOld < 1) {
timestamp = getString(R.string.map_timestamp_just_now);
}
else if (minutesOld < 2) {
timestamp = getString(R.string.map_timestamp_one_minute);
}
else {
timestamp = getString(R.string.map_timestamp_n_minutes, minutesOld);
if (minutesOld >= ORANGE_THRESHOLD_MINUTES) {
hue = BitmapDescriptorFactory.HUE_ORANGE;
}
if (minutesOld >= BLUE_THRESHOLD_MINUTES) {
hue = BitmapDescriptorFactory.HUE_BLUE;
}
}
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
return mMap.addMarker(new MarkerOptions()
.position(latLng)
.icon(BitmapDescriptorFactory.defaultMarker(hue))
.title(location.getUsername())
.snippet(timestamp));
}
private class GetGroupsRequestListener extends RequestListener<GetGroupsResponse> {
public GetGroupsRequestListener() {
super(getActivity());
}
@Override
protected void onRequestComplete(GetGroupsResponse response) {
mAllGroups = response.getGroups();
if (mAllGroups.size() > 0) {
if (mCurrentGroup == null) {
mCurrentGroup = mAllGroups.get(0);
updateGroupNameOverlay(mCurrentGroup.getGroupName());
}
performLocationsRequest(true);
}
}
}
private class GetLocationsRequestListener extends RequestListener<GetLocationsResponse> {
private boolean mmAutoZoom;
public GetLocationsRequestListener(boolean autoZoom) {
super(getActivity());
mmAutoZoom = autoZoom;
}
@Override
protected void onRequestComplete(GetLocationsResponse response) {
mAllLocations = response.getLocations();
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
populateMap(mmAutoZoom, false);
}
});
}
}
}
附言：我意识到劫持视图创建并以这种方式注入我自己的叠加可能不是最佳实践，但是对于它的价值，我试图注释掉该部分，但它并没有解决问题，所以我怀疑它是否相关。
