前提是程式能在4.4 5.1 正常跑哦 6.0多加一個許可權即可

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

附上開啟wifi熱點程式碼

    private WifiManager wifiManager = null;

 private void startWifiAp() {
         if (wifiManager.isWifiEnabled()) {
            wifiManager.setWifiEnabled(false);
        }

        Method method = null;
 

        try {
            method = wifiManager.getClass().getMethod("setWifiApEnabled",
                    WifiConfiguration.class, boolean.class);
            method.setAccessible(true);
            WifiConfiguration netConfig = new WifiConfiguration();
            netConfig.SSID = mSSID;
            netConfig.preSharedKey
 
 =  mPasswd;
            netConfig.allowedAuthAlgorithms
                    .set(WifiConfiguration.AuthAlgorithm.OPEN);
            netConfig.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
            netConfig.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
            netConfig.allowedKeyManagement
 

                    .set(WifiConfiguration.KeyMgmt.WPA_PSK);
            netConfig.allowedPairwiseCiphers
                    .set(WifiConfiguration.PairwiseCipher.CCMP);
            netConfig.allowedPairwiseCiphers
                    .set(WifiConfiguration.PairwiseCipher.TKIP);
            netConfig.allowedGroupCiphers
                    .set(WifiConfiguration.GroupCipher.CCMP);
            netConfig.allowedGroupCiphers
                    .set(WifiConfiguration.GroupCipher.TKIP);

            method.invoke(wifiManager, netConfig,true);

        } catch (Exception e) {
            Log.i(TAG, "startWifiAp: "+e.getMessage());
        }
    }