I have an AppCompatActivity
that has 3 tabs using FragmentTabHost
. One of the tabs uses LocationServices
. I would like to have the smoothest possible user experience:
If the LocationService
is off in the android system, and only if the user chooses the tab that needs the Location
I would like to display the AlertDialog
to let the user turn on the Location
in the system settings.
I have a helper class that is supposed to do all this and it does work in 3 other places in my app. In those 3 places it works "directly" in the Activity
, however in this place it needs to work "within" the Fragment
of the tab.
The problem is that if I have the line:
builder.enableAutoManage(activity, 0, this);
then builder.build()
throws an exception: IllegalStateException: Recursive entry to executePendingTransactions
Any idea how can I achieve my goal?
Here are some related code fragments:
public class CityPreferences extends AppCompatActivity {
private FragmentTabHost mTabHost;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);
mTabHost.addTab(
mTabHost.newTabSpec("available_cities")
.setIndicator(getString(R.string.tab_all_cities))
, AvailableCityFragment.class, null);
mTabHost.addTab(
mTabHost.newTabSpec("nearby_cities")
.setIndicator(getString(R.string.tab_nearby_cities))
, NearbyCityFragment.class, null);
}
}
In NearbyCityFragment
I have this 1 line of code:
class NearbyCityFragment extends Fragment {
...
LocationServiceHelper.getInstance().startOrDisplayDialog(getActivity());
(I tried it in onAttach
, onStart
, onResume
)
And here's my helper class' function:
public class LocationServiceHelper implements
GoogleApiClient.OnConnectionFailedListener,
GoogleApiClient.ConnectionCallbacks {
public boolean startOrDisplayDialog(@NonNull final FragmentActivity activity) {
final boolean servicesConnected = GooglePlayServicesHelper.checkOrDisplayDialog(activity);
if (servicesConnected) {
final boolean isEnabled = isLocationEnabledInSystem(activity);
if (isEnabled) {
if (null == mGoogleApiClient) {
mContext = activity;
mActivity = activity;
final GoogleApiClient.Builder builder = new GoogleApiClient.Builder(mContext)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this);
// the next line seems to cause the problem:
builder.enableAutoManage(activity, 0, this);
mGoogleApiClient = builder
.build();
}
return start();
} else {
final Dialog dialog = getLocationDisabledDialog(activity);
GooglePlayServicesHelper.showDialog(dialog, activity);
}
}
return false;
}
And finally the exception:
06-10 10:23:04.831 26725-26725/com.fletech.android.redalert.debug E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.fletech.android.redalert.debug, PID: 26725
java.lang.IllegalStateException: Recursive entry to executePendingTransactions
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1473)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:490)
at com.google.android.gms.common.api.g.a(Unknown Source)
at com.google.android.gms.common.api.GoogleApiClient$Builder.gI(Unknown Source)
at com.google.android.gms.common.api.GoogleApiClient$Builder.build(Unknown Source)
at com.fletech.android.redalert.helper.LocationServiceHelper.startOrDisplayDialog(LocationServiceHelper.java:113)
at com.fletech.android.redalert.city.NearbyCityFragment.onAttach(NearbyCityFragment.java:44)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:907)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1138)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:740)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:458)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5257)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
I believe you must use a unique
clientId
each time you enable auto manager. From the documentation: