我已经在很多手机上测试了我的应用，它工作正常并正确显示地图，但它并没有在某些设备上显示。非常奇怪的是，没有显示地图的设备在使用地图的其他应用程序中运行良好。我的意思是，该设备显示地图并在其他应用程序/
中正常工作这是我的代码：
public class Maps extends AppCompatActivity {
MapFragment googleMap;
GoogleMap Map;
Intent locatorService = null;
Double lat = 0.0, lon = 0.0;
Typeface typeface;
int isAvailable = 777;
private LatLng location;
Boolean forEdit = false;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.maps);
isAvailable = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
typeface = Func.getTypeFace(this);
final Bundle bl = getIntent().getExtras();
if (bl != null) {
forEdit = true;
}
if (isAvailable == 0) {
googleMap = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
googleMap.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap googleMap) {
Map = googleMap;
if (googleMap == null) {
Toast.makeText(getApplicationContext(),
"نقشه روی گوشی شما قابل نمایش نیست", Toast.LENGTH_SHORT)
.show();
}
}
});
}
mapBuilder();
}
private void mapBuilder() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
&& checkSelfPermission(
android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED
&& checkSelfPermission(
android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(Maps.this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, 1);
} else {
doGPS();
}
}
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case 1: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
mapBuilder();
} else {
MyToast.makeText(Maps.this, "دسترسی به جی پی اس غیرفعال است");
}
return;
}
}
}
public boolean stopService() {
if (this.locatorService != null) {
this.locatorService = null;
}
return true;
}
public boolean startService() {
try {
FetchCordinates fetchCordinates = new FetchCordinates();
fetchCordinates.execute();
return true;
} catch (Exception error) {
return false;
}
}
public AlertDialog CreateAlert(String title, String message) {
AlertDialog alert = new AlertDialog.Builder(this).create();
alert.setTitle(title);
alert.setMessage(message);
return alert;
}
public class FetchCordinates extends AsyncTask<String, Integer, String> {
AlertDialog.Builder a;
AlertDialog dialog;
public double lati = 0.0;
public double longi = 0.0;
public LocationManager mLocationManager;
public VeggsterLocationListener mVeggsterLocationListener;
@Override
protected void onPreExecute() {
mVeggsterLocationListener = new VeggsterLocationListener();
mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
mLocationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, 0, 0,
mVeggsterLocationListener);
}
@Override
protected void onCancelled() {
System.out.println("Cancelled by user!");
dialog.dismiss();
mLocationManager.removeUpdates(mVeggsterLocationListener);
}
@Override
protected void onPostExecute(String result) {
try {
if (dialog != null)
dialog.dismiss();
} catch (Exception e) {
e.printStackTrace();
}
lat = lati;
lon = longi;
location = new LatLng(lat, lon);
Map.addMarker(new MarkerOptions().position(location).title("مکان فعلی"));
CameraUpdate update = CameraUpdateFactory.newLatLng(location);
update = CameraUpdateFactory.newLatLngZoom(location, 15); //zooom
Map.animateCamera(update);
}
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
while (this.lati == 0.0) {
}
return null;
}
public class VeggsterLocationListener implements LocationListener {
@Override
public void onLocationChanged(Location location) {
int lat = (int) location.getLatitude(); // * 1E6);
int log = (int) location.getLongitude(); // * 1E6);
int acc = (int) (location.getAccuracy());
String info = location.getProvider();
try {
// LocatorService.myLatitude=location.getLatitude();
// LocatorService.myLongitude=location.getLongitude();
lati = location.getLatitude();
longi = location.getLongitude();
} catch (Exception e) {
// progDailog.dismiss();
// Toast.makeText(getApplicationContext(),"Unable to get Location"
// , Toast.LENGTH_LONG).show();
}
}
@Override
public void onProviderDisabled(String provider) {
Log.i("OnProviderDisabled", "OnProviderDisabled");
}
@Override
public void onProviderEnabled(String provider) {
Log.i("onProviderEnabled", "onProviderEnabled");
}
@Override
public void onStatusChanged(String provider, int status,
Bundle extras) {
Log.i("onStatusChanged", "onStatusChanged");
}
}
}
private void doGPS() {
LocationManager mlocManager = null;
LocationListener mlocListener;
mlocManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
mlocListener = new MyLocationListener();
mlocManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, mlocListener);
if (mlocManager.isProviderEnabled(LocationManager.GPS_PROVIDER) && forEdit == false) {
startService();
} else {
android.support.v7.app.AlertDialog.Builder a = new android.support.v7.app.AlertDialog.Builder(Maps.this);
a.setMessage(("جی پی اس خاموش است. آیا میخواهید روشن کنید؟"));
a.setPositiveButton(("بله"), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
LocationManager service = (LocationManager) getSystemService(LOCATION_SERVICE);
boolean enabled = service
.isProviderEnabled(LocationManager.GPS_PROVIDER);
if (!enabled) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
}
});
a.setNegativeButton(("خیر"), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
android.support.v7.app.AlertDialog dialog = a.show();
TextView messageText = (TextView) dialog.findViewById(android.R.id.message);
messageText.setGravity(Gravity.RIGHT);
messageText.setTypeface(typeface);
}
}
@Override
protected void onStart() {
super.onStart();
if (Map != null && isAvailable != 777)
mapBuilder();
}
@Override
protected void onStop() {
super.onStop();
stopService();
}
}
这是xml布局：
<?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"
android:orientation="vertical">
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
答案 0 :(得分：0)
检查isGooglePlayServicesAvailable的响应，很有可能获得“SERVICE_VERSION_UPDATE_REQUIRED”。在这种情况下，用户必须更新Google Play服务。
如果其他Google应用如Google+，GoogleMaps，Google Duo等获得更新，Google Play服务将自动更新。
switch (GooglePlayServicesUtil.isGooglePlayServicesAvailable(getActivity())) {
case ConnectionResult.SUCCESS:
googleMap = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
googleMap.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap googleMap) {
map = googleMap;
}
});
break;
case ConnectionResult.SERVICE_MISSING:
Toast.makeText(getActivity(), "Google Play Services Missing", Toast.LENGTH_SHORT).show();
break;
case ConnectionResult.SERVICE_VERSION_UPDATE_REQUIRED:
//The user has to update play services
Toast.makeText(getActivity(), "Update Google Play Services", Toast.LENGTH_SHORT).show();
break;
default:
Toast.makeText(getActivity(), GooglePlayServicesUtil.isGooglePlayServicesAvailable(getActivity()), Toast.LENGTH_SHORT).show();
}