How to get WIFI to turn on during POWERUP?

For a long time my device would always auto start WIFI now it does not. Could someo开发者_开发问答ne show how to turn wifi on automatically when device boots? Also if my app sleeps sometimes on recovery wifi is gone? Show how to test if wifi is active and if not active how to turn it on programatically. Thanks

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Use wifi manager class and use the following code to test wifi connectivity

WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);

if(wifi.isWifiEnabled()) { // write your code }else{ wifi.setWifiEnabled(true); }