volley出现的获取数据异常

使用了request.start()，所以才导致的问题。

public static void RequstGet_JSONObject() {        request.cancelAll(tag);        jsonObjectRequest.setTag(tag);        request.add(jsonObjectRequest);        request.start();}
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因为在volley在初始化RequestQueue时，已经调用了start方法。

public static RequestQueue newRequestQueue(Context context, HttpStack stack) {    File cacheDir = new File(context.getCacheDir(), DEFAULT_CACHE_DIR);    String userAgent = "volley/0";    try {        String packageName = context.getPackageName();        PackageInfo info = context.getPackageManager().getPackageInfo(packageName, 0);        userAgent = packageName + "/" + info.versionCode;    } catch (NameNotFoundException e) {    }    if (stack == null) {        if (Build.VERSION.SDK_INT >= 9) {            stack = new HurlStack();        } else {            // Prior to Gingerbread, HttpUrlConnection was unreliable.            // See: http://android-developers.blogspot.com/2011/09/androids-http-clients.html            stack = new HttpClientStack(AndroidHttpClient.newInstance(userAgent));        }    }    Network network = new BasicNetwork(stack);    RequestQueue queue = new RequestQueue(new DiskBasedCache(cacheDir), network);    queue.start();    return queue;}
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解决方法：

去掉request.start()，即可。

public static void RequstGet_JSONObject() {        request.cancelAll(tag);        jsonObjectRequest.setTag(tag);        request.add(jsonObjectRequest);}
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