How to Determine if Android Device Supports WiFi

public static final String FEATURE_WIFI was added in API level 8
Feature for getSystemAvailableFeatures() and hasSystemFeature(String).
The device supports WiFi (802.11) networking.
Constant Value: "android.hardware.wifi"

1. Get a PackageManager Instance named myPackageManager.

2. Create a Boolean Variable named bolWifiSupported

3. Set the Minimum and Target SDK version  to or greater. 

4. In the onCreate method, add the below code. This will return the Wifi availability to a boolean named bolWifiSupported. It will then display a toast displaying the Wifi availability of the device to the user.

bolWifiSupported = myPackageManager.hasSystemFeature(PackageManager.FEATURE_WIFI);
if (bolWifiSupported) {
Toast.makeText(this, "Device supports Wifi", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(this, "Device does NOT support Wifi!", Toast.LENGTH_LONG).show();

5. Compile and run!