Android：檢查是否使用 Fused Location Provider 啟用了定位服務

Question

根據Android文檔：

Google 位置服務 API 是 Google Play 服務的一部分，它提供了一個更強大、更高級的框架，與android.location的平台位置 API 相比，它可以自動處理位置提供者、用戶移動和位置准確性。

但是使用融合位置提供程序（來自 Google Play 服務中的位置 API）我不知道如何檢查用戶是否啟用或禁用了位置。

使用舊的android.location很容易：

locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

但我不想同時使用 Google Play 服務融合位置提供程序和舊的android 位置。

我如何檢查用戶是否使用 Fused Location Provider 啟用了該位置？

提前致謝。

Answer 1

這個 android 開發人員培訓教程可以提供幫助- 這是基礎知識：

在您的 Activity onCreate() 中運行的代碼：

 // Create an instance of GoogleAPIClient.
    if (mGoogleApiClient == null) {
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
    }

    mGoogleApiClient.connect();

    LocationRequest mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(10000);
    mLocationRequest.setFastestInterval(5000);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

    LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
            .addLocationRequest(mLocationRequest);

    PendingResult<LocationSettingsResult> result =
            LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, builder.build());

    result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
        @Override
        public void onResult(LocationSettingsResult locationSettingsResult) {

            final Status status = locationSettingsResult.getStatus();
            final LocationSettingsStates LS_state = locationSettingsResult.getLocationSettingsStates();
            switch (status.getStatusCode()) {
                case LocationSettingsStatusCodes.SUCCESS:
                    // All location settings are satisfied. The client can initialize location
                    // requests here.

                    break;
                case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
                    // Location settings are not satisfied. But could be fixed by showing the user
                    // a dialog.
                    try {
                        // Show the dialog by calling startResolutionForResult(),
                        // and check the result in onActivityResult().
                        status.startResolutionForResult(LocationByGPS.this, REQUEST_CHECK_SETTINGS);

                    } catch (IntentSender.SendIntentException e) {
                        // Ignore the error.
                    }
                    break;
                case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                    // Location settings are not satisfied. However, we have no way to fix the
                    // settings so we won't show the dialog.

                    break;
            }
        }
    });

覆蓋此方法：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    final LocationSettingsStates states = LocationSettingsStates.fromIntent(data);
    switch (requestCode) {
        case REQUEST_CHECK_SETTINGS:
            switch (resultCode) {
                case Activity.RESULT_OK:
                    // All required changes were successfully made
                    GetUserLocation();//FINALLY YOUR OWN METHOD TO GET YOUR USER LOCATION HERE
                    break;
                case Activity.RESULT_CANCELED:
                    // The user was asked to change settings, but chose not to

                    break;
                default:
                    break;
            }
            break;
    }
}

記住在你的班級中實現這些：

public class MyClass extends AppCompatActivity implements
    ActivityCompat.OnRequestPermissionsResultCallback,
    GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener{

  protected static final int REQUEST_CHECK_SETTINGS = 0x1;


  /* 
     your code i.e. with the above code etc....
 */

 }

在此 Google 開發人員鏈接中進行了很好的解釋。

干杯!

Answer 2

請參閱SettingsApi ：檢查您的位置請求，然后確保設備的系統設置針對應用程序的位置需求進行了正確配置。

Answer 3

就像現在在 2020 年

最新，最好和最短的方法是

    public boolean isLocationEnabled()
    {
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
// This is new method provided in API 28
                    LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
                    return lm.isLocationEnabled();
                } else {
// This is Deprecated in API 28
                    int mode = Settings.Secure.getInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE,
                            Settings.Secure.LOCATION_MODE_OFF);
                    return  (mode != Settings.Secure.LOCATION_MODE_OFF);

                }
    }

Answer 4

你也可以這樣檢查：

LocationManager service = (LocationManager) getSystemService(LOCATION_SERVICE);
boolean isEnabled = service.isProviderEnabled(LocationManager.GPS_PROVIDER);

Answer 5

如果使用 FusedLocationProviderClient，首先我們需要檢查設備中是否啟用了 Location。

private fun isLocationEnabled(): Boolean {
    val activity: Activity? = this.activity
    val lm = activity?.getSystemService(Context.LOCATION_SERVICE) as? LocationManager
    if (lm != null) {
        val enabled = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
            lm.isLocationEnabled
        } else {
            lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER)
                    || lm.isProviderEnabled(LocationManager.GPS_PROVIDER)
        }
        Log.d(TAG, "isLocationServiceEnabled", enabled)
        return enabled
    }
    return false
}

然后，檢查位置設置。

val request = LocationRequest.create()
        .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)

val settingRequest = LocationSettingsRequest.Builder()
        .addLocationRequest(request)
        .build()
// check Location settings for the request
LocationServices.getSettingsClient(context)
        .checkLocationSettings(settingRequest)
        .addOnSuccessListener {
            // OK!!
            // fusedLocationProviderClient.requestLocationUpdates
        }
        .addOnFailureListener {  exception ->
            if (exception  is ResolvableApiException) {
                try {
                    exception.startResolutionForResult(activity, RC_LOCATION_SETTINGS)
                } catch (ex: IntentSender.SendIntentException) {
                    // ignore
                }
            } else {
                // handle other errors
                showFusedDisabledDialog()
            }
        }

另外，請檢查以下鏈接。

https://developer.android.com/training/location/change-location-settings