Question

这里是一款采用Android 4.0的平板电脑。

wifiManager.isWifiEnabled()

返回true但如果我查看Android默认的Wifi设置，Wifi仍然关闭...

如何在不使用isWifiEnabled()的情况下检查WiFi是否已开启？

Answer 1

您可以尝试使用getWifiState()
获取启用Wi-Fi的状态返回：
其中一个WIFI_STATE_DISABLED，WIFI_STATE_DISABLING，WIFI_STATE_ENABLED，WIFI_STATE_ENABLING，WIFI_STATE_UNKNOWN

Answer 2

尝试以下代码。

SupplicantState supState; 
wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
supState = wifiInfo.getSupplicantState();

在您调用getSupplicantState（）时会返回其中一种状态;

ASSOCIATED - Association completed.

ASSOCIATING - Trying to associate with an access point.

COMPLETED - All authentication completed.

DISCONNECTED - This state indicates that client is not associated, but is likely to start looking for an access point.

DORMANT - An Android-added state that is reported when a client issues an explicit DISCONNECT command.

FOUR_WAY_HANDSHAKE - WPA 4-Way Key Handshake in progress.

GROUP_HANDSHAKE - WPA Group Key Handshake in progress.

INACTIVE - Inactive state.

INVALID - A pseudo-state that should normally never be seen. SCANNING - Scanning for a network.

UNINITIALIZED - No connection.

Answer 3

您可以使用Settings.Global.WIFI_ON

public boolean isWiFiSettingOn() {
        boolean isOn = false;
        try {
            isOn = Settings.Global.getInt(mContentResolver, Settings.Global.WIFI_ON) != 0;
        } catch (Settings.SettingNotFoundException e) {
            e.printStackTrace();
            // This should never happen
            Log.e(TAG, "Couldn't retrieve status of Settings.Global.WIFI_ON - returning the default value FALSE")`enter code here`;
        }

        Log.d(TAG, "isWiFiSettingOn? - " + isOn);
        return isOn;
    }

Answer 4

    ConnectivityManager cm =    (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);  
    NetworkInfo netInfo = cm.getActiveNetworkInfo(); 
    State wifi = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();

并检查wifi.states ....

Answer 5

您还必须检查您是否拥有AndroidManifest.xml中的权限

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

Android：wifiManager.isWifiEnabled（）返回TRUE但禁用WiFi

5 个答案: