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我有一个实现谷歌Maps.When的活动我开始吧，活动停止几秒钟，直到地图是完全加载。 我想使用ProgressDialog，直到地图不加载，但我无法在后台线程中启动它，因为必须在主线程中加载地图，如this link中所述。机器人 - ProgressDialog在加载谷歌地图
如何在不使用AsyncTask的情况下做到这一点？
否则，有没有立即启动活动，并显示有一样的谷歌地图应用程序中的灰色背景的未加载地图的方式？
这就是onCreate方法的代码：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mappa);
databaseHelper = new MyDatabaseHelper(this);
Bundle b = getIntent().getExtras();
String placeAddress= "";
if(b != null)
placeAddress= b.getString("indirizzo");
setUpMapIfNeeded();
gMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
gMap.setMyLocationEnabled(true);
UiSettings settings = gMap.getUiSettings();
settings.setMyLocationButtonEnabled(true);
LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
String provider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(provider);
double lat = location.getLatitude();
double lng = location.getLongitude();
position = new LatLng(lat, lng);
if(!placeAddress.equals("")){
Geocoder geocoder = new Geocoder(this, Locale.getDefault());
List<Address> indirizzi = null;
try {
indirizzi = geocoder.getFromLocationName(placeAddress, 1);
} catch (IOException e) {
e.printStackTrace();
}
double latLuogo = indirizzi.get(0).getLatitude();
double lngLuogo = indirizzi.get(0).getLongitude();
LatLng luogo = new LatLng(latLuogo, lngLuogo);
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(luogo)
.zoom(15)
.build();
gMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
}
else{
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(position)
.zoom(15)
.build();
gMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
}
LocationListener listener = new LocationListener() {
public void onLocationChanged(Location location){
//makeUseOfNewLocation(location);
}
@Override
public void onProviderDisabled(String arg0) {}
@Override
public void onProviderEnabled(String arg0) {}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
locationManager.requestLocationUpdates(provider, 0, 10, listener);
ConnectivityManager connMngr = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
final NetworkInfo netInfo = connMngr.getActiveNetworkInfo();
if(checkConnection(netInfo) == true){
loadFromDatabase(); //load markers
gMap.setInfoWindowAdapter(new InfoWindowAdapter(){
@Override
public View getInfoWindow(Marker marker) {
return null;
}
@Override
public View getInfoContents(Marker marker) {
String nome = marker.getTitle();
String indirizzo = marker.getSnippet();
View v = getLayoutInflater().inflate(R.layout.info_window_layout, null);
TextView title = (TextView)v.findViewById(R.id.titleInfoWindow);
title.setText(nome);
TextView snippet = (TextView)v.findViewById(R.id.snippetInfoWindow);
snippet.setText(indirizzo);
ImageView imView = (ImageView)v.findViewById(R.id.info_windowImageView);
impostaImmagine(imView, nome);
return v;
}
});
gMap.setOnInfoWindowClickListener(new GoogleMap.OnInfoWindowClickListener() {
@Override
public void onInfoWindowClick(Marker marker) {
final String nome = marker.getTitle();
final String indirizzo = marker.getSnippet();
startLuogoActivity(nome, indirizzo);
}
});
final Geocoder geocoder = new Geocoder(this, Locale.getDefault());
gMap.setOnMapLongClickListener(new GoogleMap.OnMapLongClickListener() {
@Override
public void onMapLongClick(LatLng point) {
List<Address> addresses = null;
if(checkConnection(netInfo) == true){
try {
addresses = geocoder.getFromLocation(point.latitude, point.longitude, 1);
} catch (IOException e) {
e.printStackTrace();
}
if(addresses!=null){
String address = addresses.get(0).getAddressLine(0);
String city = addresses.get(0).getAddressLine(1);
String country = addresses.get(0).getAddressLine(2);
String indirizzo = address + ", " + city + ", " + country;
final Dialog addByClickDialog = onCreateDialogADDByClick(getBaseContext(), indirizzo);
addByClickDialog.show();
Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
v.vibrate(50);
}else{
final Dialog nessunaConnessioneDialog = onCreateDialogNessunaConnessione(getBaseContext());
nessunaConnessioneDialog.show();
Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
v.vibrate(50);
}
}
else{
final Dialog nessunaConnessioneDialog = onCreateDialogNessunaConnessione(getBaseContext());
nessunaConnessioneDialog.show();
Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
v.vibrate(50);
}
}
});
Button addButton = (Button)findViewById(R.id.addButton);
final Dialog addDialog;
if(checkConnection(netInfo) == false){
addDialog = onCreateDialogADD(getBaseContext(), false);
}else{
addDialog = onCreateDialogADD(getBaseContext(), true);
}
addButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
addDialog.show();
}
});
Button deleteButton = (Button)findViewById(R.id.deleteButton);
final Dialog deleteDialog;
if(checkConnection(netInfo) == false){
deleteDialog = onCreateDialogDELETE(getBaseContext(), false);
}else{
deleteDialog = onCreateDialogDELETE(getBaseContext(), true);
}
deleteButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
deleteDialog.show();
}
});
}
显示您的代码的主要部分。所以我可以帮你.. – Riser
你使用MapActivity或MapFragment吗？ –
为什么需要几秒钟？除非你在主线上做了额外的事情，否则地图加载速度很快 –