获取android 手机mac与device_id

public static String getDeviceInfo(Context context) {
    try{
      org.json.JSONObject json = new org.json.JSONObject();
      android.telephony.TelephonyManager tm = (android.telephony.TelephonyManager) context
          .getSystemService(Context.TELEPHONY_SERVICE);

      String device_id = tm.getDeviceId();

      android.net.wifi.WifiManager wifi = (android.net.wifi.WifiManager) context.getSystemService(Context.WIFI_SERVICE);

      String mac = wifi.getConnectionInfo().getMacAddress();
      json.put("mac", mac);

      if( TextUtils.isEmpty(device_id) ){
        device_id = mac;
      }

      if( TextUtils.isEmpty(device_id) ){
        device_id = android.provider.Settings.Secure.getString(context.getContentResolver(),android.provider.Settings.Secure.ANDROID_ID);
      }

      json.put("device_id", device_id);

      return json.toString();
    }catch(Exception e){
      e.printStackTrace();
    }
  return null;
}

　　ps:清单文件中需要的权限

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