使用对话框启用 GPS

Posted 2023-04-14

【中文标题】使用对话框启用 GPS

【英文标题】：Enable GPS using Dialog Box

【发布时间】：2016-01-22 14:13:39

【问题描述】：

我正在尝试通过用户确认对话框来启用 GPS 设置。

这里是代码

    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，确认后 gps 设置将自动启用为高精度。

我的问题是我需要在用户确认（对话框“是”）后将 GPS 设置启用为省电模式（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。

【问题讨论】：

供参考，可能会有所帮助 - ***.com/questions/28759454/…

【参考方案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。

GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener

我已经在上面实现了这些interfaces

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

  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。

GoogleApiClient.ConnectionCallbacks接口中提供了onConnected方法。

@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() 这个函数显示对话框 无需进入位置设置即可启用 GPS

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());
    

【讨论】：

感谢您的帮助。让我检查一下这段代码，但我没有使用谷歌地图，我认为上面的代码会将位置设置为高精度。我的应用程序是一个后台应用程序，它需要关于位置的最少信息。有没有办法自动将位置设置设置为省电模式？

您可以设置Location Request的优先级来设置省电模式。检查编辑的答案

@Boss 很高兴我找到了这个。如果用户按下否，我怎样才能继续弹出对话框？

@BogdanDaniel 你可以在onActivityResult 中查看。检查结果代码RESULT_CANCELED

@Boss 我应该在里面放什么？ status.startResolutionForResult(getActivity(), 1000); 还是整个 onConnected ？