android–Volley缓慢而导致内存泄漏

概述在我的项目中,我使用volley来下载一个JSON流,我将其解析并显示在列表视图中.我使用以下方法加载我的数据：privatevoidloadEventData(intyear,finalintmonth){//getvolleyrequestqueuerequestQueue=cpcApplication.getRequestQueue(getActivity());S

在我的项目中,我使用volley来下载一个JSON流,我将其解析并显示在列表视图中.我使用以下方法加载我的数据：

private voID loadEventData(int year, final int month) {    // get volley request queue    requestQueue = cpcApplication.getRequestQueue(getActivity());    String url = "****************?year=" + year            + "&month=" + month;    pd = ProgressDialog.show(getActivity(), "Loading Events", "RetrIEving Data from Server");    pd.setCancelable(true);    JsonObjectRequest jr = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JsONObject>() {        @OverrIDe        public voID onResponse(JsONObject response) {            Log.i(TAG, response.toString());            // parse the incoming response            parseJson(response, month);            // notify the ListvIEw that the data set has changed            adapter.notifyDataSetChanged();            // set the ListvIEw at the top position            ListVIEw.setSelection(current.get(Calendar.DAY_OF_MONTH));            // dismiss the ProgressDialog            pd.dismiss();        }        }, new Response.ErrorListener() {        @OverrIDe        public voID one rrorResponse(VolleyError error) {            error.printstacktrace();            // cancel the progress dialog            pd.dismiss();            // let the user kNow that a network connection is not available            Toast.makeText(getActivity(), "Cannot communicate with server.  Check network connection.", Toast.LENGTH_LONG).show();        }    });    // add the network request to the queue    requestQueue.add(jr);}

对此方法的第一次调用非常有效.在第二次调用中,我收到超时错误.当我使用以下命令时：

jr.setRetryPolicy(new DefaultRetryPolicy(            2500, DefaultRetryPolicy.DEFAulT_TIMEOUT_MS, DefaultRetryPolicy.DEFAulT_BACKOFF_MulT));

为了增加请求的时间,请求超过30秒并产生以下日志输出：

10-19 20:53:19.746: D/Volley(17523): [2786] BasicNetwork.logSlowRequests: http response for request=<[ ] http://************ 0x63ea5535 norMAL 1> [lifetime=41769], [size=5467846], [rc=200], [retryCount=2]10-19 20:53:19.796: D/dalvikvm(17523): GC_CONCURRENT freed 7462K, 26% free 24424K/33000K, paused 6ms+4ms, total 56ms10-19 20:53:19.796: D/dalvikvm(17523): WAIT_FOR_CONCURRENT_GC blocked 51ms10-19 20:53:19.826: I/dalvikvm-heap(17523): Grow heap (frag case) to 35.123MB for 10935708-byte allocation10-19 20:53:19.857: D/dalvikvm(17523): GC_FOR_ALLOC freed 3K, 20% free 35100K/43680K, paused 23ms, total 28ms10-19 20:53:19.917: D/dalvikvm(17523): GC_CONCURRENT freed 2018K, 19% free 35816K/43680K, paused 3ms+4ms, total 60ms10-19 20:53:20.007: D/dalvikvm(17523): GC_CONCURRENT freed 4874K, 15% free 37226K/43680K, paused 2ms+3ms, total 27ms10-19 20:53:20.007: D/dalvikvm(17523): WAIT_FOR_CONCURRENT_GC blocked 24ms10-19 20:53:20.067: D/dalvikvm(17523): GC_FOR_ALLOC freed 5037K, 15% free 38601K/44900K, paused 19ms, total 19ms10-19 20:53:20.117: D/dalvikvm(17523): GC_FOR_ALLOC freed 4680K, 14% free 40045K/46564K, paused 20ms, total 20ms10-19 20:53:20.177: D/dalvikvm(17523): GC_FOR_ALLOC freed 5576K, 14% free 41572K/48272K, paused 20ms, total 20ms10-19 20:53:20.227: D/dalvikvm(17523): GC_FOR_ALLOC freed 6133K, 15% free 43406K/50548K, paused 20ms, total 20ms10-19 20:53:20.287: D/dalvikvm(17523): GC_CONCURRENT freed 6486K, 15% free 45029K/52428K, paused 2ms+2ms, total 24ms10-19 20:53:20.287: D/dalvikvm(17523): WAIT_FOR_CONCURRENT_GC blocked 11ms10-19 20:53:20.407: D/Volley(17523): [1] Request.finish: 42553 ms: [ ] http://****** 0x63ea5535 norMAL 1

当我在浏览器中执行相同的请求时,只需几秒钟.为什么延迟和令人难以置信的内存消耗？

解决方法:

每次调用该方法都会创建一个新的RequestQueue,这不是推荐的方法.您应该创建一个RequestQueue,可能是一个公开可见的单例,在创建应用程序时初始化一次.

尝试将RequestQueue移到外面,看看它是否解决了您的问题.

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