Checking Wi-Fi enabled or not on Android

问题:

What would the code be for checking whether the Wi-Fi is enabled or not?

回答1:

WifiManager wifi = (WifiManager)getSystemService(Context.WIFI_SERVICE);
if (wifi.isWifiEnabled()){
//wifi is enabled
}

For details check here

回答2:

The above answers work fineو but don't forget to add the right permissions in the Manifest:

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" >
</uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" >
</uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" >
</uses-permission>

Hope it helps ..

回答3:

public static boolean wifiState()
{
    WifiManager mng = (WifiManager) getSystemService(Context.WIFI_SERVICE);
    return mng.isWifiEnabled();
}

回答4:

The top answer is correct, but not up to date because this code may leak memory on certain devices.

Therefore the better answer would be:

WifiManager wifi =(WifiManager)getApplicationContext().getSystemService(Context.WIFI_SERVICE);
if (wifi.isWifiEnabled()){
//wifi is enabled
}

Permissions in app=>mainfests=>AndroidManifest.xml:

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />

Reference: https://www.mysysadmintips.com/other/programming/759-the-wifi-service-must-be-looked-up-on-the-application-context