java - wifiSetEnabled(true) occasionally not working -

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i'm making first app i'm not expert. btw in app i've create service should enable or disable wi-fi according boolean value i'm passing service through pending intent use start (the service, i'm using alarmmanager this).

now, works fine in cases, wifi won't turn on, , i'm sure service started because complete other works it's supposed do.

i first thought permission's fault, can see permission i'm using in manifest below.

looking around here in stackoverflow suggested add update_device_stats permission don't think solution because said: works.

important: notice can't enable when wifi turned off while, few hours.

this snippet service: (tsmanagerhelper class pending intent , values) 

public int onstartcommand(intent intent, int flags, int startid) {      boolean op2;      wifimanager wifimanager=(wifimanager)getsystemservice(wifi_service);      bundle bundle;      if(intent!=null) {         bundle = intent.getextras();         op2 = bundle.getboolean(tsmanagerhelper.option2);          //wi-fi         if(op2 != wifimanager.iswifienabled()){             if(op2)                 wifimanager.setwifienabled(true);             else                 wifimanager.setwifienabled(false);         }

manifest's permissions:

<uses-permission android:name="android.permission.change_wifi_state" /> <uses-permission android:name="android.permission.access_wifi_state" /> <uses-permission android:name="android.permission.receive_boot_completed" /> <uses-permission android:name="android.permission.write_settings" /> <uses-permission android:name="android.permission.wake_lock" /> <uses-permission android:name="android.permission.access_network_state"/> <uses-permission android:name="android.permission.change_network_state"/>

idea? repeat i'm unexperted, whoever me :)


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