У меня есть приложение, которое получает местоположение пользователя и отправляет его в мою базу данных Firebase, в которой находится список мест, ближайших к пользователю.Радиус местоположения был установлен менее 50 км (50000 м).если в этом радиусе нет мест, я хочу, чтобы появилось диалоговое окно с предупреждением о том, что мест нет.Места будут обновляться по мере запуска приложения.Диалог предупреждения должен отображаться каждый раз, когда пользователь пытается получить доступ к местоположениям в пределах установленного радиуса.Может ли кто-нибудь помочь мне с этим?Любая помощь будет принята с благодарностью.
LActivity
public class LActivity extends AppCompatActivity implements
LocationListener,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener {
private static final String TAG = "Location1";
private static final long INTERVAL = 1000 * 10;
private static final long FASTEST_INTERVAL = 1000 * 5;
;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
public Location mCurrentLocation;
String mLastUpdateTime;
ViewPager viewPager;
ProgressDialog progressdialog;
protected void createLocationRequest() {
mLocationRequest = LocationRequest.create();
mLocationRequest.setInterval(INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
progressdialog = new ProgressDialog(this);
progressdialog.setMessage("Pending");
Runnable progressRunnable = new Runnable() {
@Override
public void run() {
progressdialog.cancel();
}
};
Handler pdcanceller = new Handler();
pdcanceller.postDelayed(progressRunnable,1500);
progressdialog.show();
createLocationRequest();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
setContentView(R.layout.activity_rape_location);
viewPager = (ViewPager) findViewById(R.id.viewpagerL);
viewPager.setAdapter(new RapeLocationPageAdapter(getSupportFragmentManager(),
LActivity.this));
}
public void getLocation(View view) {
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 501);
} else {
mGoogleApiClient.connect();
}
progressdialog.show();
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == 501) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
mGoogleApiClient.connect();
} else {
Toast.makeText(this, "Location permission denied. Please grant location permission to the app.", Toast.LENGTH_SHORT).show();
}
}
}
@Override
public void onStart() {
super.onStart();
Log.d(TAG, "onStart fired ..............");
mGoogleApiClient.connect();
progressdialog.show();
}
@Override
public void onStop() {
super.onStop();
Log.d(TAG, "onStop fired ..............");
mGoogleApiClient.disconnect();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
startLocationUpdates();
}
protected void startLocationUpdates() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED)
{
final AlertDialog builder = new AlertDialog.Builder(this).create();
builder.setMessage("Location has not been granted");
builder.setButton(AlertDialog.BUTTON_POSITIVE, "Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
builder.dismiss();
}
});
builder.show();
return;
}
PendingResult<Status> pendingResult = LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
Log.d(TAG, "Location update started ..............: ");
progressdialog.show();
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
final AlertDialog builder = new AlertDialog.Builder(this).create();
builder.setMessage("If there are no locations near you, please contact the local police for immediate attention");
builder.setButton(AlertDialog.BUTTON_POSITIVE, "Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
builder.dismiss();
}
});
builder.show();
}
@Override
public void onLocationChanged(Location location) {
mCurrentLocation = location;
RapeLocation rapeLocation = (RapeLocation) getSupportFragmentManager().findFragmentByTag("android:switcher:" + R.id.viewpagerRape + ":" + viewPager.getCurrentItem());
rapeLocation.update(mCurrentLocation);
}
}
LActivityMain
public class LActivityMain extends Fragment {
RecyclerView recyclerView;
LocationsAdapter locationsAdapter;
ArrayList<LocationModel> locationModelArrayList = new ArrayList<LocationModel>();
ArrayList<LocationModel> filteredlocationModelArrayList = new ArrayList<LocationModel>();
protected DatabaseReference mDatabase;
LActivityMain locationActivityfin;
Button bnt1;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.activity_locationmain, container, false);
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
locationActivityfin = (LActivityMain) getActivity();
mDatabase = FirebaseDatabase.getInstance().getReference();
recyclerView = view.findViewById(R.id.rvLocations);
bnt1 = view.findViewById(R.id.locdone);
bnt1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
getActivity().onBackPressed();
}
});
locationsAdapter = new LocationsAdapter(getActivity(), new OnItemClickListener() {
@Override
public void onItemClick(View view, int position) {
LatLng latLng = new LatLng(filteredlocationModelArrayList.get(position).getLatitude(),
filteredlocationModelArrayList.get(position).getLongitude());
String url = "http://maps.google.com/maps?saddr=" + locationActivityfin.mCurrentLocation.getLatitude() + "," + locationActivityfin.mCurrentLocation.getLongitude() + "&daddr=" + latLng.latitude + "," + latLng.longitude + "&mode=driving";
Intent intent = new Intent(android.content.Intent.ACTION_VIEW,
Uri.parse(url));
PackageManager packageManager = getActivity().getPackageManager();
if (intent.resolveActivity(packageManager) != null) {
startActivity(intent);
} else {
if (getView() != null)
Snackbar.make(getView(), "Make sure Google Maps is installed to use this feature", Snackbar.LENGTH_LONG).show();
}
}
}, filteredlocationModelArrayList);
getDataFromServer();
//textView.setText(getArguments().getDouble("latitude") + ", " + getArguments().getDouble("longitude"));
}
public void update(Location location) {
// Toast.makeText(getActivity(), "updated", Toast.LENGTH_SHORT).show();
filteredlocationModelArrayList.clear();
for (LocationModel locationModel : locationModelArrayList) {
Location location1 = new Location("Loc");
location1.setLatitude(locationModel.getLatitude());
location1.setLongitude(locationModel.getLongitude());
if (location1.distanceTo(location) <= 50000 && filteredlocationModelArrayList.size() < 30) {
double distance = (double) (location1.distanceTo(location) / 1000);
try {
distance = round(distance, 2);
} catch (Exception e) {
}
locationModel.setDistance(distance);
filteredlocationModelArrayList.add(locationModel);
}
locationsAdapter.update(filteredlocationModelArrayList);
}
}
public double round(double value, int places) {
if (places <= 0) throw new IllegalArgumentException();
BigDecimal bd = new BigDecimal(value);
bd = bd.setScale(places, RoundingMode.HALF_UP);
return bd.doubleValue();
}
void getDataFromServer() {
mDatabase.child("ali").child("location221").addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot dataChild : dataSnapshot.getChildren()) {
LocationModel locationModel = dataChild.getValue(LocationModel.class);
locationModelArrayList.add(locationModel);
}
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.setAdapter(locationsAdapter);
if (locationActivityRape.mCurrentLocation != null) {
update(locationActivityRape.mCurrentLocation);
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
}