Question

FusedLocation有一个很棒的API来检查用户是否已启用所有相关设置来获取位置。我按照文档https://developers.google.com/android/reference/com/google/android/gms/location/SettingsApi启动了SettingsApi。我检查用户设置的代码如下所示

private void checkLocationSetting()
{
    if (mLocationSettingsRequest == null)
    {
        mLocationSettingsRequest =
                new LocationSettingsRequest.Builder()
                        .addLocationRequest(mLocationRequest)
                        .setAlwaysShow(true)
                        .build();
    }

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

    result.setResultCallback(new ResultCallback<LocationSettingsResult>()
    {
        @Override
        public void onResult(LocationSettingsResult result)
        {
            final Status status = result.getStatus();
            final LocationSettingsStates state = result.getLocationSettingsStates();
            switch (status.getStatusCode())
            {
                case LocationSettingsStatusCodes.SUCCESS:
                {
                    // All location settings are satisfied. The client can initialize location
                    // requests here.
                    requestNewLocationBySettingLocationReq();
                    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(SpotToiletMap.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.
                    MiscellaneousMethods.showGenericSnackBar(rootView, getString(R.string.location_settings_unavailable));
                    break;
                }
            }
        }
    });
}

这段代码第一次完美无缺。随后，PendingResult CallBack从未奏效。我也无法在logcat上找到任何日志。对我来说，它看起来像一个实现问题。

以下是重现此问题的方法。

关闭GPS。尝试调用该方法，它完美地按预期工作。它要我切换n GPS。收到位置更新后，再次关闭GPS并调用此方法。我从未得到启用GPS的对话框。我在点击按钮时调用此方法，尝试获取用户的最新位置。

编辑：我试图将PendingResult结果声明为类变量。仍然没有运气。我还尝试通过检查它是否为null来初始化结果，正如预期的那样，并且正如Google的文档中所提到的，它会引发一个异常，提到结果已经被消耗。

Answer 1

看起来问题是您每次都不会重新创建public void checkLocationSetting() { mLocationRequest = LocationRequest.create(); mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY); mLocationRequest.setInterval(30 * 1000); mLocationRequest.setFastestInterval(5 * 1000); LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder() .addLocationRequest(mLocationRequest); builder.setAlwaysShow(true); result = LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, builder.build()); result.setResultCallback(new ResultCallback<LocationSettingsResult>() { @Override public void onResult(LocationSettingsResult result) { final Status status = result.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 dialog. try { // Show the dialog by calling startResolutionForResult(), // and check the result in onActivityResult(). status.startResolutionForResult( MainActivity.this, REQUEST_LOCATION); } 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; } } }); }，因为只有在它为空时才会重新创建它。

我让它运行，在Android 4.4.4和6.0.1上进行了测试。

每次按下按钮时都会显示该对话框（前提是按钮按下时设备上禁用了位置）：

#import <Cocoa/Cocoa.h>

Android FusedLocation的SettingsApi不会多次使用

1 个答案: