Google Maps Android API性能极差

时间:2017-08-06 02:00:12

标签: android google-maps

我目前正在尝试使用标记编写一个在地图上显示多个位置的应用。即使只与相对较小的小型人合作也是如此。一套标记(我已经看到StackOverflow问题,人们想要绘制超过100k),我的表现很差,我的地图需要几秒钟才能移动。

我还有我的GPU分析的截图,我想知道是否有人能理解为什么这些呼叫如此极高:

Screenshot of GPU profiling on-screen

我曾试图使用DDMS来分析我的应用程序,但这似乎并没有给我任何确凿的答案。

我使用的代码如下:

tab_map.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <fragment xmlns:android="http://schemas.android.com/apk/res/android"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        class="com.google.android.gms.maps.SupportMapFragment"
        android:id="@+id/city_map"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingTop="?attr/actionBarSize" />
</FrameLayout>

LocationFragment.java

/* a whole list of imports and package definition */

/**
 * Created by Ruben on 05-08-17.
 */

public class LocationsFragment extends Fragment
        implements OnMapReadyCallback {
    private static final String TAG = LocationsFragment.class.getSimpleName();

    private LocationsFragment instance;

    private City city;
    private List<Marker> markers;
    private List<Location> locations;

    private Target iconTarget;

    private GoogleMap map;
    private SupportMapFragment mapFragment;
    private BitmapDescriptor markerIcon;
    private Bitmap markerIconBitmap;

    private ApiService apiService;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.tab_map, null);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceStace) {
        super.onActivityCreated(savedInstanceStace);

        // Set up the view
        instance = this;

        mapFragment = (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.city_map);
        apiService = RestClient.getClient(getContext()).create(ApiService.class);
        city = getArguments().getParcelable("city");
        markers = new ArrayList<>();

        iconTarget = new Target() {
            @Override
            public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
                markerIconBitmap = bitmap;
                updateMarkerIcons();
            }

            @Override
            public void onBitmapFailed(Drawable errorDrawable) {
            }

            @Override
            public void onPrepareLoad(Drawable placeHolderDrawable) {

            }
        };

        // Start async processes
        // Load Google map
        mapFragment.getMapAsync(this);

        // Load locations from API
        getLocations();

        // Load custom marker for city
        getCityMarker();

    }

    private void getCityMarker() {
        Picasso
                .with(getContext())
                .load(city.getMarker().getUrl())
                .resize(ScreenUtils.convertDIPToPixels(getContext(), 24), ScreenUtils.convertDIPToPixels(getContext(), 24))
                .into(iconTarget);
    }

    @Override
    public void onMapReady(GoogleMap map) {
        this.map = map;

        if(markerIconBitmap == null) {
            markerIcon = BitmapDescriptorFactory.fromAsset("default1.png");
        }else{
            markerIcon = BitmapDescriptorFactory.fromBitmap(markerIconBitmap);
        }

        if (ContextCompat.checkSelfPermission(this.getContext(), "ACCESS_FINE_LOCATION") == PackageManager.PERMISSION_GRANTED) {
            map.setMyLocationEnabled(true);
        } else {
            Toast.makeText(instance.getContext(), getString(R.string.no_location_permission), Toast.LENGTH_LONG).show();
        }

        map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(city.getCenter().getLat(), city.getCenter().getLong()), 12));

        setMarkers();
    }

    public void getLocations() {
        Call<LocationsResponse> call = apiService.getLocations(city.getId());
        call.enqueue(new Callback<LocationsResponse>() {
            @Override
            public void onResponse(Call<LocationsResponse> call, Response<LocationsResponse> response) {
                if(response.code() != 200) {
                    Toast.makeText(instance.getContext(), getString(R.string.retrieving_locations) + "1", Toast.LENGTH_LONG).show();
                    return;
                }

                Log.d(TAG, "Received locations: " + response.body().getLocations().size());
                locations = response.body().getLocations();

                setMarkers();
            }

            @Override
            public void onFailure(Call<LocationsResponse> call, Throwable t) {
                t.printStackTrace();
                Toast.makeText(instance.getContext(), getString(R.string.retrieving_locations) + "1", Toast.LENGTH_LONG).show();
            }
        });
    }

    public void setMarkers() {
        Log.d(TAG, "Calling setMarkers");
        if(map != null && locations != null) {
            // Remove all the old markers
            if(!markers.isEmpty()) {
                int numMarkers = markers.size();
                for(int i = 0; i < numMarkers; i++) {
                    markers.get(i).remove();
                }
                markers.clear();
            }

            // Create a new marker for each location
            int numLocations = locations.size();
            Log.d(TAG, "Setting markers for " + numLocations + " locations");
            for(int i = 0; i < numLocations; i++) {
                Location location = locations.get(i);
                markers.add(map.addMarker(
                    new MarkerOptions()
                        .position(new LatLng(location.getPosition().getLat(), location.getPosition().getLong()))
                        //.icon(markerIcon)
                        //.title(location.getName())
                        //.snippet(getString(R.string.location_marker_text, NumberFormat.getInstance().format(location.getStones())))
                ));
            }
        }
    }

    public void updateMarkerIcons() {
        Log.d(TAG, "Calling updateMarkerIcons");
        if(map != null && markerIconBitmap != null) {
            markerIcon = BitmapDescriptorFactory.fromBitmap(markerIconBitmap);
        }

        if(map != null && !markers.isEmpty()) {
            int numMarkers = markers.size();
            for(int i = 0; i < numMarkers; i++) {
                Marker marker = markers.get(i);
                //marker.setIcon(markerIcon);
            }
        }
    }

    @Override
    public void onDestroyView() {
        Picasso.with(this.getContext()).cancelRequest(iconTarget);

        mapFragment.onDestroyView();

        super.onDestroyView();
    }

    public void updateLocations() {
        if(locations != null) {
            getLocations();
        }
    }

    public void setCity(City city) {
        this.city = city;
        getCityMarker();
    }
}

正如您所看到的,我取消注释了我为标记设置.snippet.icon的一些行,因为我怀疑这可能是问题所在。可悲的是,这似乎不是问题所在。

使用断点,我试图确认我设置/编辑标记的所有函数都没有被调用,我发现这绝对不是这种情况。设置标记后,此文件中不会执行其他代码。我的所有其他活动似乎运行正常,所以我开始相信这是与Google地图相关的问题。值得注意的是,当我离开标记时,意味着不再出现在我的屏幕边界,性能不错,滚动看起来很流畅。

1 个答案:

答案 0 :(得分:1)

对于迟到的回答,很抱歉,您可能已经找到了解决方案,但它可能对其他人有帮助。

您考虑过Clusters吗?

您遇到的问题是,需要大量资源才能在地图上渲染所有这些标记,并且每次视图移动时都会重新渲染api。

当许多引脚真正靠近时,你无法真正区分它们。默认情况下,群集将根据地图上的缩放对它们进行分组,以优化渲染和可视化。 如果默认行为或外观不符合您的喜好,您可以轻松覆盖它。

希望我帮助过。