If we use this code we see a message: searching for GPS. However, the GPS symbol is merely shown; GPS doesn't actually work:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent = new Intent("android.location.GPS_ENABLED_CHANGE");
intent.putExtra("enabled", true);
this.sendBroadcast(intent);
}
Why isn't it working ? And how to make it work correctly ?
That's not allowed anymore. If you take a look at this bug report, this hack was subverted in Android 4.4. It still works on older OS versions, though you shouldn't be using it anywhere now. To quote that report:
This doesn't work ... however, it can cause stuff to react as if the GPS status changed -- for example, the HTC One S will show the GPS icon in the status bar, even though the GPS is still disabled.
That explains why you can see the GPS icon even though it isn't actually ON. Now as for why you can't do that ...
Android's GPS technology periodically sends location data to Google even when no third-party apps are actually using the GPS function. In many Western countries this is seen as a major violation of privacy. That's why Google made it mandatory to get the user's consent before using the GPS function. The following dialog is seen whenever the user turns GPS on:
And hence it is no longer possible to programmatically change the GPS settings, as by necessity it requires the user's permission. What the programmer can do is direct the user to the GPS settings by calling
startActivity(context, new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
and let the user make a choice.
As an interesting point, if you try sending the GPS_ENABLED_CHANGE broadcast on the new OS versions, you get a
java.lang.SecurityException: Permission Denial:
not allowed to send broadcast android.location.GPS_ENABLED_CHANGE
error. As you can see, its a SecurityException with a permission denial message.
Related
I have written a foreground service in my app and I am doing some API operation every 5 minutes once. My app is mainly used for location tracking and it always needs location permission. If user disable the location for my app by any chance then I just want to create a local notification from my service. My app users mostly don't bring my app to foreground. So I want to check whether the location permission is enabled or not. If not then I just want to show a notification which tells the user that the app needs location permission. Now I just manually went to android settings and disabled the location permission for my app. I have two services running in my app. Suddenly both stopped working. I just want to know the reason why it stopped? Will it be stopped always until I enable the permission? What can I do to intimate my user to enable the permission? As my app always runs in background, I want to handle it in service. Please give your opinion to solve my issue.
NullPointerException: Attempt to read from field'LanguageInitBean$Data LanguageInitBean.data' on a null object reference
When I change the storage permission, I can't read the data stored in memory
Ask for help
public static class LanguageInitCache{
public static LanguageInitBean languageInitBean;
}
private void startToNext(String response) {
languageInitBean = GsonUtils.json2Bean(response, LanguageInitBean.class);
}
We develop an application which requires several permissions in order to get the user’s location while in the background.
We are having problems requesting the required permissions on Xiaomi devices. It seems that in addition to location permission and white listing the app from battery optimizations, two additional steps are required, specific to Xiaomi devices:
Disabling battery saver:
Enabling auto-start:
The problem is we found no way of automatically requesting permission from the user, and the only way we found is having the user manually go to these screens and change the settings.
We did find shortcuts to take us “half way”.
Going to power settings:
Intent intent = new
Intent("miui.intent.action.POWER_HIDE_MODE_APP_LIST").addCategory(Intent.CATEGORY_DEFAULT);
Going to auto start settings:
Intent intent = new
Intent("miui.intent.action.OP_AUTO_START").addCategory(Intent.CATEGORY_DEFAULT);
But multiple non intuitive actions are still required from the user.
Our aim:
We would very much like to make the process easier for the user. Optimally, to have a system dialog appear which asks the user for the permissions, instead of having him manually change the settings, much like the whitelisting of normal Android devices:
Is it possible using a Xiaomi specific SDK extension?
If (1) is not possible, at the very least we need a way to know if the user changes these settings or not. Currently we don’t know and cannot inform the user if the application works properly or not!
I have developed a Android hybrid app that amongst other activities tracks the users location and displays it to the user showing where they have been recently. This works by invoking LocationServices.FusedLocationApi.requestLocationUpdates at a 10 second update rate.
Obviously this requires location permission and for ANDROID Marshmallow and above I check and request the necessary location privileges from the user before requesting location updates.
I have read many other StackOverflow question about the same topic but I have not found a satisfactory answer about preventing Android from terminating the app if location permission is revoked for the app by the user after initially granting it.
I would be more than happy for the app to stop displaying the user's location and track, after all the user has asked for it to be stopped, but I am far less happy for the app to be terminated, as I said earlier the app does many other things for the user whilst running in the background.
As far as I understand there is no callback that can be used to allow me to remove the location updates as soon as the location permission is revoked. How could I change my strategy to avoid the app crashing?
It is not that I am expecting users to do this very often, but I think it good practice to make the app as bulletproof as possible. Please do not remind me that Android can terminate any app in the background as that is not my question here.
Do I need to adopt a singular rather than a periodic approach to requesting the location so that I can re-check the permission exists each time.
Or is it better to try and catch the error. If so where do I do this? Would it be inside onLocationChanged?
What I mean by app crash is that the process is terminated (I have checked and this actually happens)
That's perfectly normal, when the user revokes a runtime permission.
What I would like to do is prevent the process terminating if there is any way I can do this.
Sorry, that is not possible.
Since I suspect that few users even know that they can revoke runtime permissions, this is not going to be a common occurrence, IMHO.
Blockquote
however why did the Android developers not just cause a callback to be generated to allow the app code base to react
You could register for the LocationManager.PROVIDERS_CHANGED_ACTION in the BroadcastReceiver.
When it is hit, you can check if the provider is still enabled and use that accordingly to prevent your app from crashing when someone revokes the location permission.
LocationManager locationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
boolean enabled = locationManager != null && locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
I have an App that listens to android.location.PROVIDERS_CHANGED broadcast to stay aware of the phone's current location capabilities.
With Android M and the new App-runtime permissions, it works normally when the location is changed from the system/general panel. But if a user disables the location permission specifically for the App, the same broadcast is not fired.
So far I can test for location access with a regular AlarmManager, but it's quite odd and not very responsive.
Is there any other specific method, ideally a kind of BroadcastReceiver to register that keeps us informed of this location app-permission-change with Android M?
Sorry, but you are not directly notified about permission changes, for locations or other permissions, unless there's some undocumented hack that I'm not aware of.
If the user revokes a permission, your app's process will be terminated. The idea is that you will find out about the revoked permission when your app runs again and you call checkSelfPermission(). That flow is optimized for more conventional cases, where the permission checks are being conducted in an activity opened by the user. It doesn't handle your case very well (though, IMHO, location permissions shouldn't affect the broadcast as you describe).
In the N Developer Preview, you can now set up JobScheduler to monitor a Uri for changes and trigger your job as needed. This is a bit like registering a ContentObserver, except that you don't need the process running all the time — JobScheduler registers the observer and just invokes your JobService as needed. I think that the roster of enabled location sources is found in the Settings provider somewhere; if so, for Android 6.1/7.0/Turbo System 5000/whatever N turns into, you might be able to use JobScheduler to find out about the location source changes, instead of relying on the broadcast.
That doesn't help you for Android 6.0, though. You can use JobScheduler or AlarmManager or something to see if you lost the permission (via checkSelfPermission()), but that's kinda wasteful of battery life (and, as a result, will not work well given Doze mode and possibly app standby).
I work in QA for an company that helps market applications. Currently I have been tasked to ensure location dependent apps function if correctly (ie if im in russia the app displays the russian content and if i change to us the app updates to the us content)
I have tried numerous items to accomplish this but get no where.
What i have tried:
Proxy. Setting this up via wifi to several locations. Both the app and the device still show my current location.
Apps: I have tried all of the following apps and they all give the same result as above.
Fake Location
AutoProxy
Fake GPS
I have enabled developer mode on the devices, and have ensured that "Mock Locations" is checked.
Use case 1:
A developer whats us to test his app which is only available in england. Google Play still sees me in US
Use case 2:
A developer releases a game where the background changes based on your location if i cant force the location change I cant verify this feature works.
Im guessing the fails so far are due to the fact that the location being called in our test apps is network location not GPS?
Any help would be awesome. Even if you could just point me in a direction.
Thank you Greatly
J
Update:
Ok, Thanks to the answers about google play and mock locations. So with those in mind lets think about it from another perspective. If the app is not calling for mock location, Is there anyway to force a mock location override? im trying to cover all the bases here, One app for sure does not use this method, so I still need to find a way around.
depending on how they are calling for the location, I would think (remember im knew here) that using a proxy would work, however as stated above, i'm not getting anywhere there either. Did try a few free proxy's from hidemyass but even the browser wouldn't work with them.
Yes, network location does not get faked by mock location providers. I don't know why not, but it only fakes GPS. In addition, your app has to request the MOCK permission to get it. If it doesn't have this permission, setting a mock location will not actually fake anything to the app. This is for security purposes, so a malicious app can't start broadcasting the wrong location to the phone.