对象的Gson字符串

Question

我被困在如何解决这个问题上，我想我理解这个问题，那就是gson的格式不正确，例如在这种情况下缺少Bsid。如果这个问题不再发生，我该如何修复它呢？

Error:E/AndroidRuntime: FATAL EXCEPTION: main
Process: , PID: 32171 com.google.gson.JsonSyntaxException: java.io.EOFException: End of input at line 1 column 65536 path $[555].bBsid

正在使用的代码：

    if(json.length()== Integer.MAX_VALUE){
            Log.d(TAG, "Error");
            return null;
        } else {


            Log.i(TAG, json);

            Type arrayType = new TypeToken<List<WifiObject>>() {
            }.getType();
            Gson gson = new Gson();


            ArrayList<WifiObject> wifiObjectArrayList = new ArrayList<WifiObject>();
            List wifiObjectList = gson.fromJson(json, arrayType);
            for (int i = 0; i < wifiObjectList.size() - 1; i++) {

                if (wifiObjectList.get(i) != null) {
                    WifiObject wifiObject = (WifiObject) wifiObjectList.get(i);
                }

//                    Log.i(TAG, wifiObject.getBBSID());

//                    wifiObjectArrayList.add(wifiObject);
            }

            return wifiObjectArrayList;
        }

对象：

  public WifiObject(String bBSID, String sSID, String capabilites, Integer frequency, Integer level){
    //Instead of this.bssid for example because the setters already have Log's in them
    setBBSID(bBSID);
    setSSID(sSID);
    setCapabilites(capabilites);
    setFrequency(Integer.toString(frequency));
    setLevel(Integer.toString(level));

}

正在尝试转换以下内容：

 02-28 23:57:53.876 4259-4259/ I/WifiHandler: 
[{"bBsid":"00:62:ec:fd:ea:f0","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2462","level":"-45","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ea:f1","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2462","level":"-46","sSid":"KINGSWAP"},{"bBsid":"00:62:ec:fd:ea:f2","capabilities":"[ESS]","frequency":"2462","level":"-46","sSid":"The Cloud"},{"bBsid":"00:62:ec:fd:ea:f3","capabilities":"[WPA2-EAP-CCMP][WPA-EAP-TKIP][ESS]","frequency":"2462","level":"-46","sSid":"PLOCAL"},{"bBsid":"00:62:ec:fd:ea:f4","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2462","level":"-46","sSid":"SLaMFT"},{"bBsid":"00:62:ec:fd:ea:50","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2437","level":"-53","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ea:ff","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"5520","level":"-53","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ea:fd","capabilities":"[ESS]","frequency":"5520","level":"-53","sSid":"The Cloud"},{"bBsid":"00:62:ec:fd:ea:53","capabilities":"[WPA2-EAP-CCMP][WPA-EAP-TKIP][ESS]","frequency":"2437","level":"-54","sSid":"PLOCAL"},{"bBsid":"00:62:ec:fd:ea:51","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2437","level":"-55","sSid":"KINGSWAP"},{"bBsid":"00:62:ec:fd:ea:52","capabilities":"[ESS]","frequency":"2437","level":"-55","sSid":"The Cloud"},{"bBsid":"00:62:ec:fd:ea:fb","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"5520","level":"-55","sSid":"SLaMFT"},{"bBsid":"00:62:ec:fd:ea:54","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2437","level":"-55","sSid":"SLaMFT"},{"bBsid":"00:62:ec:fd:ea:5d","capabilities":"[ESS]","frequency":"5240","level":"-56","sSid":"The Cloud"},{"bBsid":"00:62:ec:fd:ea:fe","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"5520","level":"-56","sSid":"KINGSWAP"},{"bBsid":"00:62:ec:fd:ea:5e","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"5240","level":"-57","sSid":"KINGSWAP"},{"bBsid":"00:62:ec:fd:ea:5c","capabilities":"[WPA2-EAP-CCMP][WPA-EAP-TKIP][ESS]","frequency":"5240","level":"-57","sSid":"PLOCAL"},{"bBsid":"00:62:ec:fd:ea:5f","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"5240","level":"-58","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ea:5b","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"5240","level":"-58","sSid":"SLaMFT"},{"bBsid":"00:62:ec:fd:ea:fc","capabilities":"[WPA2-EAP-CCMP][WPA-EAP-TKIP][ESS]","frequency":"5520","level":"-58","sSid":"PLOCAL"},{"bBsid":"00:62:ec:fd:ec:30","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2437","level":"-59","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ee:61","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2412","level":"-59","sSid":"KINGSWAP"},{"bBsid":"00:62:ec:fd:ee:62","capabilities":"[ESS]","frequency":"2412","level":"-59","sSid":"The Cloud"},{"bBsid":"00:62:ec:fd:ee:64","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2412","level":"-59","sSid":"SLaMFT"},{"bBsid":"00:62:ec:fd:ec:31","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2437","level":"-60","sSid":"KINGSWAP"},{"bBsid":"00:62:ec:fd:ee:60","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2412","level":"-60","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ee:63","capabilities":"[WPA2-EAP-CCMP][WPA-EAP-TKIP][ESS]","frequency":"2412","level":"-60","sSid":"PLOCAL"},{"bBsid":"00:62:ec:fd:ec:32","capabilities":"[ESS]","frequency":"2437","level":"-60","sSid":"The Cloud"},{"bBsid":"00:62:ec:fd:ec:34","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2437","level":"-61","sSid":"SLaMFT"},{"bBsid":"00:42:68:a6:a6:41","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2462","level":"-62","sSid":"KINGSWAP"},{"bBsid":"00:42:68:a6:a6:42","capabilities":"[ESS]","frequency":"2462","level":"-62","sSid":"The Cloud"},{"bBsid":"00:42:68:a6:a6:43","capabilities":"[WPA2-EAP-CCMP][WPA-EAP-TKIP][ESS]","frequency":"2462","level":"-62","sSid":"PLOCAL"},{"bBsid":"00:42:68:a6:a6:44","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2462","level":"-62","sSid":"SLaMFT"},{"bBsid":"00:42:68:a6:a6:40","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2462","level":"-62","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ec:33","capabilities":"[WPA2-EAP

Answer 1

让我马上把这个问题讲清楚；

 Gson gson = new Gson();
 String json ="[{\"bBsid\":\"00:62:ec:fd:ea:f0\",\"capabilities\":\"[WPA2-EAP-CCMP][ESS]\",\"frequency\":\"2462\",\"level\":\"-45\",\"sSid\":\"eduroam\"}]"; // Your Json String

        if (json.equalsIgnoreCase("")) {
            return null;
        }
        YourClassName obj = gson.fromJson(json, YourClassName.class);

return obj;

这里，obj是你的Class对象，它被转换成Class对象，打印它的日志并检查它。希望这能对你有所帮助。

Answer 2

可能的原因是Json字符串被截断了。截断可能只有在Log打印时才会发生，但我认为现在情况并非如此。

也就是说，如果您从Json中删除最后一个不完整的WifiObject，并添加闭合]，它将正确反序列化，WifiObjects为34。

您应该跟踪Json的生成点，并查看两者之间发生了什么。我也遇到过同样的问题，但就是不记得我的原因是什么(如果我找到了，我会回来的)。

我怀疑有类似于将这个长字符串存储在SharedPreferences中的东西，但是您没有为Json生成和后来的操作提供代码，所以很难说出更具体的东西。