ПРОБЛЕМА: Я пытаюсь зарегистрировать BroadcastReceiver для моего MapsActivity из метода (scanWifiSignal()) объекта (m) экземпляра другого класса (wifiConnectivity)), который создается в методе класса LocationUpdate (checkLocationSettings).Проблема в том, что OnReceive callback никогда не вызывается.если я перенесу код объявлений BroadcastReceiver и callback OnReceive в класс активности maps, то все будет работать нормально.Ниже упрощенный код.
ВОПРОС: Я прошу вас помочь мне определить проблему в приведенном ниже коде.Я думаю, что-то связано со сферой действия wifiScanReceiver, но я не уверен.Спасибо за вашу помощь.
MapsActivity
public class extends AppCompatActivity implements OnMapReadyCallback {
public BroadcastReceiver wifiScanReceiver;
private WifiManager wifiManager;
private final LocationUpdate locationUpdate= new LocationUpdate(MapsActivity.this);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
// If location permission is granted initialize Map
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
mapSync();
} else {
requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, MY_PERMISSION_FINE_LOCATION);
}
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
// Check if localization permission is granted
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
mMap.setMyLocationEnabled(true);
// If wifi is the active connection, enable settings to get location updates and start wifi signal scan
if(wifi.checkWifiConnection()){
// Check if location settings are appropriated for the location request
locationUpdate.checkLocationSettings(mLocationRequest,REQUEST_CHECK_SETTINGS, mFusedLocationClient,mLocationCallback,mMap);
} else {
// Check if location settings are appropriated for the location request
locationUpdate.checkLocationSettings(mLocationRequest,REQUEST_CHECK_SETTINGS,mFusedLocationClient,mLocationCallback,mMap);
//Toast.makeText(getApplicationContext(),"no wifi, check tipo connessione attuale", Toast.LENGTH_LONG).show();
}
} else {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, MY_PERMISSION_FINE_LOCATION);
}
}
}
wifiConnectivity
public class wifiConnectivity {
private MapsActivity mapsActivity;
private BroadcastReceiver wifiScanReceiver;
private Context context;
public wifiConnectivity(MapsActivity mapsActivity)
{
this.mapsActivity = mapsActivity;
this.context = mapsActivity.getApplicationContext();
}
public void scanWifiSignal(){
final WifiManager wifiManager;
wifiManager = mapsActivity.getWifiManager();
wifiScanReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
mapsActivity.setLocalMaxSignalStrength(0);
ist<ScanResult> results = wifiManager.getScanResults();
//public void handleWifiScanResults()
for (int i = 0; i < results.size(); i++) {
ScanResult el = results.get(i);
// Get signal level as a number from 0 to n-1
int signalLevel = wifiManager.calculateSignalLevel(el.level, 5);
// If signal level value is greater than the registered max, update the max value.
if (signalLevel >= mapsActivity.getLocalMaxSignalStrength()){
mapsActivity.setLocalMaxSignalStrength(signalLevel);
}
Toast.makeText(mapsActivity.getApplicationContext(), "SSID:" + el.SSID + "frequency" + el.frequency + "lev:" + signalLevel, Toast.LENGTH_SHORT).show();
}
}
};
mapsActivity.setWifiScanReceiver(wifiScanReceiver);
this.context.registerReceiver(wifiScanReceiver, new IntentFilter(wifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
mapsActivity.setReceivingWifiScanResults(true);
}
LocationUpdate
public class LocationUpdate {
private MapsActivity mapsActivity;
private wifiConnectivity m ;
public LocationUpdate(MapsActivity mapsActivity)
{
this.mapsActivity=mapsActivity;
}
public void checkLocationSettings(final LocationRequest mLocationRequest, final int REQUEST_CHECK_SETTINGS, final FusedLocationProviderClient mFusedLocationClient, final LocationCallback mLocationCallback, final GoogleMap mMap) {
// Get and check location services settings
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(mLocationRequest)
.setAlwaysShow(true);
SettingsClient client = LocationServices.getSettingsClient(mapsActivity);
Task<LocationSettingsResponse> task = client.checkLocationSettings(builder.build());
task.addOnSuccessListener(mapsActivity, new OnSuccessListener<LocationSettingsResponse>() {
@Override
public void onSuccess(LocationSettingsResponse locationSettingsResponse) {
// All location settings are satisfied. The client can initialize
// location requests here
LocationUpdate locationUpdate = new LocationUpdate(mapsActivity);
locationUpdate.getLastKnownLocation(mFusedLocationClient);
locationUpdate.startLocationUpdates(mFusedLocationClient, mLocationCallback, mLocationRequest);
m=new wifiConnectivity(mapsActivity);
m.scanWifiSignal();
}
});
this.context = mapsActivity.getApplicationContext();
}