在基于GPS应用，重要的是用户使他的全球定位系统是很重要的。如果没有，那么我们通常会显示一个对话框，说明用户的应该使自己的全球定位系统的设置，可以使用此功能的。

In GPS based applications, it is important that the user enable his GPS. If not then usually we would show a dialog stating that the user "should enable his GPS from the settings to be able to use this functionality".

当用户preSS确定，他将被重定向到设置页面，我不喜欢这样的解决方案，因为它需要用户从应用程序上下文中的设置。

When the user press OK he will be redirected to the Settings page, I don't like this solution since it takes the user out of the application context in to the settings.

我已经注意到，谷歌地图应用程序有一个更好的解决方案，这是显示一个整洁的对话框时，需要一个GPS功能。当用户选择确定GPS将被启用的直接没有任何转向的设置。

I have noticed that "google maps" application has a better solution, which is to show a neat dialog when a GPS feature is needed. Upon the user's selection "OK" GPS will be enabled directly without any redirection to the settings.

我可以启用GPS无需将用户重定向到设置屏幕像谷歌地图应用程序？

下面结账图片：

推荐答案

要拥有你需要的功能：

编译com.google.android.gms：玩-服务：7.0.0

-

 // Check the location settings of the user and create the callback to react to the different possibilities
LocationSettingsRequest.Builder locationSettingsRequestBuilder = new LocationSettingsRequest.Builder()
                .addLocationRequest(mLocationRequest);
PendingResult<LocationSettingsResult> result =
                LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, locationSettingsRequestBuilder.build());
result.setResultCallback(mResultCallbackFromSettings);

然后创建回调：

And then create the callback:

// The callback for the management of the user settings regarding location
private ResultCallback<LocationSettingsResult> mResultCallbackFromSettings = new ResultCallback<LocationSettingsResult>() {
    @Override
    public void onResult(LocationSettingsResult result) {
        final Status status = result.getStatus();
        //final LocationSettingsStates locationSettingsStates = result.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(
                            MapActivity.this,
                            REQUEST_CHECK_SETTINGS);
                } catch (IntentSender.SendIntentException e) {
                    // Ignore the error.
                }
                break;
            case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                Log.e(TAG, "Settings change unavailable. We have no way to fix the settings so we won't show the dialog.");
                break;
        }
    }
};

然后，最后，在 onActivityResult 我有以下内容：

/**
 * Used to check the result of the check of the user location settings
 *
 * @param requestCode code of the request made
 * @param resultCode code of the result of that request
 * @param intent intent with further information
 */
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    //final LocationSettingsStates states = LocationSettingsStates.fromIntent(intent);
    switch (requestCode) {
        case REQUEST_CHECK_SETTINGS:
            switch (resultCode) {
                case Activity.RESULT_OK:
                    // All required changes were successfully made
                    if (mGoogleApiClient.isConnected() && userMarker == null) {
                        startLocationUpdates();
                    }
                    break;
                case Activity.RESULT_CANCELED:
                    // The user was asked to change settings, but chose not to
                    break;
                default:
                    break;
            }
            break;
    }
}