Android Google-Shopping API force在解析时关闭

Question

我正在尝试用下面的静态方法向Google-Shopping API发送一个请求，我认为它是有效的：

public static String GET_TITLE(String url) throws JSONException {

    InputStream is = null;
    String result = "";
    JSONObject jArray = null;

    // http post
    try {
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost(url);
            HttpResponse response = httpclient.execute(httppost);
            HttpEntity entity = response.getEntity();
            is = entity.getContent();

    } catch(Exception e) {
            Log.e("log_tag", "Error in http connection "+e.toString());
    }

我传递的网址是这样的：https://www.googleapis.com/shopping/search/v1/public/products/country=US&q=shirts&alt=json &rankBy=relevancy&key=AIzaSyDRKgGmJrdG6pV6DIg2m-nmIbXydxvpjww

接下来，我尝试用同样的方法解析这个响应(我认为问题出在这里)：

    try {
        jArray = new JSONObject(result);            
    } catch(JSONException e){
        Log.e("log_tag", "Error parsing data "+e.toString());
    }

    JSONObject itemObject = jArray.getJSONObject("items");
    JSONObject productObject = itemObject.getJSONObject("product");

    String attributeGoogleId = productObject.getString("googleId");
    String attributeProviderId = productObject.getString("providerId");
    String attributeTitle = productObject.getString("title");*/
    String attributePrice = productObject.getString("price");
    JSONObject popupObject = productObject.getJSONObject("popup");

        return attributeTitle;
    }

这是如此令人沮丧，我知道它应该是简单的，但我只是不太能让它工作，我不是很确定错误是什么，因为我在HTC Desire上测试它，因为我的仿真器在启动时会给出一个“无效命令行参数”错误，但这是另一个问题，无论如何，提前谢谢！

编辑：

第一个让它看起来像是URL有问题，我是不是应该更改它，看看是否有什么不同？

04-01 12:09:05.142: ERROR/log_tag(24968): Error in http connection java.net.UnknownHostException: www.googleapis.com
04-01 12:09:05.142: ERROR/log_tag(24968): Error converting result java.lang.NullPointerException
04-01 12:09:05.142: ERROR/log_tag(24968): Error parsing data org.json.JSONException: End of input at character 0 of 
04-01 12:09:05.142: DEBUG/AndroidRuntime(24968): Shutting down VM
04-01 12:09:05.142: WARN/dalvikvm(24968): threadid=1: thread exiting with uncaught exception (group=0x400259f8)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): FATAL EXCEPTION: main
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=0, result=-1, data=Intent {     act=com.google.zxing.client.android.SCAN flg=0x80000 (has extras) }} to activity     {com.spectrum.stock/com.spectrum.stock.CaptureActivity}: java.lang.NullPointerException
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at android.app.ActivityThread.deliverResults(ActivityThread.java:3734)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3776)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at android.app.ActivityThread.access$2800(ActivityThread.java:135)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2166)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at android.os.Handler.dispatchMessage(Handler.java:99)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at android.os.Looper.loop(Looper.java:144)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at android.app.ActivityThread.main(ActivityThread.java:4937)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at java.lang.reflect.Method.invokeNative(Native Method)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at java.lang.reflect.Method.invoke(Method.java:521)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at dalvik.system.NativeStart.main(Native Method)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): Caused by: java.lang.NullPointerException
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at com.spectrum.stock.JSONResponse.GET_TITLE(JSONResponse.java:61)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at com.spectrum.stock.CaptureActivity.onActivityResult(CaptureActivity.java:78)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at android.app.Activity.dispatchActivityResult(Activity.java:3931)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): at android.app.ActivityThread.deliverResults(ActivityThread.java:3730)
04-01 12:09:05.152: ERROR/AndroidRuntime(24968): ... 11 more
04-01 12:09:05.162: WARN/ActivityManager(96):    Force finishing activity com.spectrum.stock/.CaptureActivity

编辑:更改后来自LogCat的错误日志。

04-01 15:00:33.912: ERROR/QualcommCameraHardware(67): native_access_parm: error (No such file or directory): fd 30, type 1, length 32, status 0
04-01 15:00:34.002: ERROR/QualcommCameraHardware(67): num_buffers = 4
04-01 15:00:34.002: ERROR/QualcommCameraHardware(67): num_buffers = 8
04-01 15:00:34.082: ERROR/mm-camera 8x vfe(67): vfe_util_updaterollofftbl: sensor doesn't support rolloff correction by VFE
04-01 15:00:35.022: ERROR/mm-camera-af(67): af_algo_preview: FAILED....
04-01 15:00:37.872: ERROR/mm-camera-af(67): af_algo_preview: FAILED....
04-01 15:00:38.052: ERROR/mm-camera 8x-vfe(67): Received VFE Stop ACK!!! ctrlCmd is NULL
04-01 15:00:38.482: ERROR/QualcommCameraHardware(67): native_access_parm: error (No such file or directory): fd 30, type 1, length 32, status 0
04-01 15:00:38.542: ERROR/QualcommCameraHardware(67): num_buffers = 4
04-01 15:00:38.542: ERROR/QualcommCameraHardware(67): num_buffers = 8
04-01 15:00:38.602: ERROR/mm-camera 8x vfe(67): vfe_util_updaterollofftbl: sensor doesn't support rolloff correction by VFE
04-01 15:00:39.182: ERROR/mm-camera-af(67): af_algo_preview: FAILED....
04-01 15:00:41.662: ERROR/mm-camera-af(67): af_algo_preview: FAILED....
04-01 15:00:44.742: ERROR/mm-camera-af(67): af_algo_preview: FAILED....
04-01 15:00:47.422: ERROR/ImapServer(351): catch exception
04-01 15:00:47.422: ERROR/ImapServer(351): java.lang.NumberFormatException: unable to parse 'BASE64' as integer
04-01 15:00:47.422: ERROR/ImapServer(351): at java.lang.Integer.parse(Integer.java:433)
04-01 15:00:47.422: ERROR/ImapServer(351): at java.lang.Integer.parseInt(Integer.java:422)
04-01 15:00:47.422: ERROR/ImapServer(351): at java.lang.Integer.parseInt(Integer.java:382)
04-01 15:00:47.422: ERROR/ImapServer(351): at java.lang.Integer.valueOf(Integer.java:682)
04-01 15:00:47.422: ERROR/ImapServer(351): at com.htc.android.mail.server.ImapServer.getTheDisplaySize(ImapServer.java:2810)
04-01 15:00:47.422: ERROR/ImapServer(351): at com.htc.android.mail.server.ImapServer.processFetchInfo(ImapServer.java:2694)
04-01 15:00:47.422: ERROR/ImapServer(351): at com.htc.android.mail.server.ImapServer.fetchInfo(ImapServer.java:2531)
04-01 15:00:47.422: ERROR/ImapServer(351): at com.htc.android.mail.server.ImapServer.refresh(ImapServer.java:1348)
04-01 15:00:47.422: ERROR/ImapServer(351): at com.htc.android.mail.RequestController$MainRequestQueueThread.run(RequestController.java:570)
04-01 15:00:47.622: ERROR/log_tag(26112): Error in http connection java.net.UnknownHostException: www.googleapis.com
04-01 15:00:47.632: ERROR/log_tag(26112): Error parsing data org.json.JSONException: End of input at character 0 of 
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): FATAL EXCEPTION: main
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=0, result=-1, data=Intent { act=com.google.zxing.client.android.SCAN flg=0x80000 (has extras) }} to activity {com.spectrum.stock/com.spectrum.stock.CaptureActivity}: java.lang.NullPointerException
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at android.app.ActivityThread.deliverResults(ActivityThread.java:3734)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3776)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at android.app.ActivityThread.access$2800(ActivityThread.java:135)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2166)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at android.os.Handler.dispatchMessage(Handler.java:99)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at android.os.Looper.loop(Looper.java:144)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at android.app.ActivityThread.main(ActivityThread.java:4937)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at java.lang.reflect.Method.invokeNative(Native Method)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at java.lang.reflect.Method.invoke(Method.java:521)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at dalvik.system.NativeStart.main(Native Method)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): Caused by: java.lang.NullPointerException
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at com.spectrum.stock.JSONResponse.GET_TITLE(JSONResponse.java:63)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at com.spectrum.stock.CaptureActivity.onActivityResult(CaptureActivity.java:78)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at android.app.Activity.dispatchActivityResult(Activity.java:3931)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112): at android.app.ActivityThread.deliverResults(ActivityThread.java:3730)
04-01 15:00:47.642: ERROR/AndroidRuntime(26112):     ... 11 more
04-01 15:00:48.272: ERROR/JavaBinder(96): !!! FAILED BINDER TRANSACTION !!!
04-01 15:00:48.282: ERROR/JavaBinder(96): !!! FAILED BINDER TRANSACTION !!!
04-01 15:00:48.282: ERROR/JavaBinder(96): !!! FAILED BINDER TRANSACTION !!!
04-01 15:00:48.282: ERROR/JavaBinder(96): !!! FAILED BINDER TRANSACTION !!!
04-01 15:00:48.282: ERROR/JavaBinder(96): !!! FAILED BINDER TRANSACTION !!!

Answer 1

我找到了这个问题的答案elsewhere，我认为这只是一件微不足道的事情，因为它只改变了几个东西，当请求成功发送时，这些东西阻止了响应为空。

Answer 2

In the above the result value is "" since the "Inputstream is" is not being converted to String. to convert it to string use following method and try


    public static String convertStreamToString(InputStream is) {
            StringBuilder sb = new StringBuilder();
            try{
                BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
                String line = null;
                while ((line = reader.readLine()) != null) {
                    sb.append(line).append("\n");
                }
                is.close();
            } catch(OutOfMemoryError om){
                //Constants.TEXT_NETWORKERROR = Constants.MSG_ERROR_CONNECTION;
                om.printStackTrace();
            } catch(Exception ex){
                //Constants.TEXT_NETWORKERROR = Constants.MSG_ERROR_CONNECTION;
                ex.printStackTrace();
            }
            return sb.toString();
        }//convertStreamToString()


Minor changes in your code to handle NullpointerException

try {
        jArray = new JSONObject(result);  
JSONObject itemObject = jArray.getJSONObject("items");
    JSONObject productObject = itemObject.getJSONObject("product");

    String attributeGoogleId = productObject.getString("googleId");
    String attributeProviderId = productObject.getString("providerId");
    String attributeTitle = productObject.getString("title");*/
    String attributePrice = productObject.getString("price");
    JSONObject popupObject = productObject.getJSONObject("popup");

        return attributeTitle;          
    } catch(JSONException e){
        Log.e("log_tag", "Error parsing data "+e.toString());
return null;
    }


    }