android - 使用对话框启用 GPS

Question

我正在尝试通过用户确认对话框启用 GPS 设置。

这是代码

    public void turnGPSOn() {
            LocationManager service = (LocationManager) getSystemService(LOCATION_SERVICE);
            boolean enabled = service
                    .isProviderEnabled(LocationManager.GPS_PROVIDER);
            if (!enabled) {
                      AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
                        this);
                      alertDialogBuilder
                        .setMessage("GPS is disabled in your device. Enable it?")
                        .setCancelable(false)
                        .setPositiveButton("Enable GPS",
                                new DialogInterface.OnClickListener() {
                                    public void onClick(DialogInterface dialog,
                                                        int id) {
/** Here it's leading to GPS setting options*/
                                        Intent callGPSSettingIntent = new Intent(
                                                android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                                        startActivity(callGPSSettingIntent);
                                    }
                                });
                alertDialogBuilder.setNegativeButton("Cancel",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int id) {
                                dialog.cancel();
                            }
                        });
                AlertDialog alert = alertDialogBuilder.create();
                alert.show();
            }
        }

以上代码将引导用户进入 gps 设置选项。但我在许多应用程序(最近的应用程序)中看到，在确认 gps 设置后将自动启用高精度。

我的问题是我需要在用户确认(对话框"is")后启用 GPS 设置为省电模式(或任何其他模式)，而无需进入 GPS 设置。

MinSDK:9
TargetSDK:23
BuildToolVer:23.0.1

问候。

Answer 1

您可以为此使用 GoogleApiClient。

  private static GoogleApiClient client;
  private  Location mLastLocation;

同时实现必要的接口(interface)。

GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener

我已经实现了上面这些接口(interface)

像这样在 OnCreate 中初始化 GoogleApiClient。添加必要的 Api。

  if (client == null) {
        client = new GoogleApiClient.Builder(mContext)
                .enableAutoManage(context, 0, this)
                .addApi(LocationServices.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();
    }

您可以通过在位置请求中设置优先级来设置准确性。

这些是不同的优先级。

LocationRequest.PRIORITY_HIGH_ACCURACY
LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY
LocationRequest.PRIORITY_LOW_POWER
LocationRequest.PRIORITY_NO_POWER

在 onConnected 方法中发出位置请求。

onConnected 方法在 GoogleApiClient.ConnectionCallbacks 接口(interface)中可用。

@Override
public void onConnected(Bundle bundle) {

    final LocationRequest locationRequest = LocationRequest.create();
    locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    locationRequest.setInterval(30 * 1000);
    locationRequest.setFastestInterval(5 * 1000);

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

    builder.setAlwaysShow(true);
    result = LocationServices.SettingsApi.checkLocationSettings(client, builder.build());

    if (result != null) {
        result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
            @Override
            public void onResult(LocationSettingsResult locationSettingsResult) {
                final Status status = locationSettingsResult.getStatus();

                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 optionsDialog.
                        try {
                            // Show the optionsDialog by calling startResolutionForResult(),
                            // and check the result in onActivityResult().
                            if (status.hasResolution()) {
                                status.startResolutionForResult(getActivity(), 1000);
                            }
                        } 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 optionsDialog.
                        break;
                }
            }
        });
    }
}

startResolutionForResult() This function shows the dialog for enabling GPS without going to the Location Settings

1000 是 REQUEST_CODE

并在 onActivity Result 中检索位置

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if ((resultCode == Activity.RESULT_OK) && (requestCode == 1000)) {
        mLastLocation = LocationServices.FusedLocationApi.getLastLocation(client);
        Log.e("location", mLastLocation.getLatitude() + ":" + mLastLocation.getLongitude());
    }
}