Android Volley-使用StringRequest到XML API時無響應

Question

請求字符串到XML API時沒有響應。 這是代碼：

String url =  "http://www.w3schools.com/xml/note.xml"
String url2 = "http://api.json.request"
RequestQueue queue = Volley.newRequestQueue(context);
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
        new Response.Listener<String>() {
            @Override
            public void onResponse(String _response) {

                Log.d("json=>",_response);
                res = _response;
            }
        }, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {

        // Error handling
        Log.d("jsone=>", error.toString());

    }
});

queue.add(stringRequest);

我已經使用Google API（url2）對其進行了測試，但是還可以。 嘗試獲取響應時，也許Android Volley的運行速度太慢，但看到日志我根本沒有得到響應。

發起請求時的日志：

01-28 10:57:05.253 21424-21424/com.merahjambutech.zuki.deteksi I/Timeline: Timeline: Activity_launch_request time:26387334
01-28 10:57:05.353 21424-21424/com.merahjambutech.zuki.deteksi D/pre=: 0
01-28 10:57:05.433 21424-21424/com.merahjambutech.zuki.deteksi W/ImageLoader: Try to initialize ImageLoader which had already been initialized before. To re-init ImageLoader with new configuration call ImageLoader.destroy() at first.
01-28 10:57:05.463 21424-21470/com.merahjambutech.zuki.deteksi D/dalvikvm: GC_FOR_ALLOC freed 503K, 11% free 24699K/27632K, paused 29ms, total 29ms
01-28 10:57:05.483 21424-21470/com.merahjambutech.zuki.deteksi I/dalvikvm-heap: Grow heap (frag case) to 29.898MB for 3686416-byte allocation
01-28 10:57:05.543 21424-21424/com.merahjambutech.zuki.deteksi W/ImageLoader: Try to initialize ImageLoader which had already been initialized before. To re-init ImageLoader with new configuration call ImageLoader.destroy() at first.
01-28 10:57:05.573 21424-21547/com.merahjambutech.zuki.deteksi D/dalvikvm: GC_FOR_ALLOC freed 173K, 10% free 28324K/31236K, paused 15ms, total 15ms
01-28 10:57:05.573 21424-21547/com.merahjambutech.zuki.deteksi I/dalvikvm-heap: Grow heap (frag case) to 33.438MB for 3686416-byte allocation                                                                               </note>
01-28 10:57:05.643 21424-21424/com.merahjambutech.zuki.deteksi I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@42485428 time:26387720

Answer 1

請確保您在manifest文件中添加權限 ：

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