Android 6:以编程方式连接到特定的wifi网络无法工作开发者社区

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public void connectToWifi(){
        WifiManager wifiManager = (WifiManager) super.getSystemService(android.content.Context.WIFI_SERVICE);
        WifiConfiguration wc = new WifiConfiguration();
        WifiInfo wifiInfo = wifiManager.getConnectionInfo();
        wc.SSID = "\"NETWORK_NAME\"";
        wc.preSharedKey = "\"PASSWORD\"";
        wc.status = WifiConfiguration.Status.ENABLED;
        wc.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
        wc.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
        wifiManager.setWifiEnabled(true);
        int netId = wifiManager.addNetwork(wc);
        if (netId == -1) {
            netId = getExistingNetworkId(wc.SSID);
        wifiManager.disconnect();
        wifiManager.enableNetwork(netId, true);
        wifiManager.reconnect();
    } catch (Exception e) {
        e.printStackTrace();
private int getExistingNetworkId(String SSID) {
    WifiManager wifiManager = (WifiManager) super.getSystemService(Context.WIFI_SERVICE);
    List<WifiConfiguration> configuredNetworks = wifiManager.getConfiguredNetworks();
    if (configuredNetworks != null) {
        for (WifiConfiguration existingConfig : configuredNetworks) {
            if (existingConfig.SSID.equals(SSID)) {
                return existingConfig.networkId;
    return -1;
}

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

    WifiConfiguration wificonfiguration = new WifiConfiguration();
    StringBuffer stringbuffer = new StringBuffer("\"");
    stringbuffer.append((new StringBuilder(String.valueOf(HOTSPOT_NAME))).append("\"").toString());
    wificonfiguration.SSID = stringbuffer.toString();
    wificonfiguration.allowedKeyManagement.set(KeyMgmt.WPA_PSK);
    wificonfiguration.allowedAuthAlgorithms.set(0);
    wificonfiguration.status = 2;
    wificonfiguration.preSharedKey = "\"" + HOTSPOT_PASSWORD + "\"";
    int networkId_ = wifi.addNetwork(wificonfiguration);

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