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我目前正在嘗試編寫一個應用程序，使用標記在地圖上顯示幾個位置。即使只使用一個相對較小的標記集（我已經看到了StackOverflow問題，人們想要繪製超過100k的問題），但我的表現非常糟糕，我的地圖需要幾秒鐘才能移動。谷歌地圖Android API性能極差
我也有我的GPU性能分析的截圖，我想知道，如果任何人都可以理解爲什麼這些電話都是如此極高：
我試圖剖析使用DDMS我的應用程序，但這似乎沒有給出任何確鑿的答案。
我正在使用的代碼如下：
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();
}
}
正如你所看到的，我有些註釋掉其中我爲標記設置了.snippet或.icon，因爲我懷疑這可能是問題所在。可悲的是，這似乎不是問題所在。
使用斷點，我試圖確認，我設置/編輯標記的函數沒有被調用後，他們應該，我發現這絕對不是這種情況。一旦設置了標記，就不會在此文件中執行其他代碼。我的其他所有活動似乎都運行良好，因此我開始相信這是與Google地圖相關的問題。值得注意的是，當我遠離標記時，意味着不再處於屏幕邊界，表現很體面，滾動看起來很平滑。