在Android上检查是否启用了Wi-Fi

Question

用于检查Wi-Fi是否启用的代码是什么？

Answer 1

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

详情请点击此处

Answer 2

上面的答案很好用,但不要忘记在Manifest中添加正确的权限:

<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"/>

希望能帮助到你 ..

Answer 3

最佳答案是正确的,但不是最新的,因为此代码可能会泄漏某些设备上的内存.

因此,更好的答案是:

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

app => mainfests => AndroidManifest.xml中的权限:

<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" />

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

Answer 4

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