解析JSON时出错-jsonarray没有值，PHP错误？

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我无法解析数据。我的代码有什么问题？
我是Android的新手，在这里我完全是一片空白。任何帮助都将不胜感激
我在这里试过各种各样的东西。

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如果我必须从数据库中检索图像并在Android中的

ListView

或customview中显示它们，该怎么办？

从JSON中删除重复的键，如

product，success

，使用PHP代码格式化JSON，并使其如下图所示，这有助于您轻松解析JSON。 例如：

如果您能够像上面那样创建JSON。然后您可以使用下面的代码解析它

{"product":[{"pid":"1","name":"sid"},{"pid":"2‌​","name":"shef"}],"success":"1","value":"true"}

JSONArray productDetailsJsonArr=reader.getJSONArray（“产品”）；
对于（int i=0；i

试试这个：

                   JSONArray productDetailsJsonArr = reader.getJSONArray("product");
                   for (int i = 0; i < productDetailsJsonArr.length(); i++) {
                        JSONObject pJsonObj = productDetailsJsonArr.getJSONObject(i);
                        String pid = pJsonObj.getString("pid");
                        String sid = pJsonObj.getString("sid");
                    }

                    String success = reader.getString("success");
                    String value = reader.getString("value");

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您的

doInBackground

代码有问题

JSONArray json=jParser.makeHttpRequest（url\u所有产品，“GET”，参数）

在这里，您可以在
json
变量中获取数据，而在任何地方您都无法使用它
请尝试运行php以查看是否有所需的输出，如果没有问题，请查看您的应用程序请发布您的json@Rajsundar：我可以在调试日志中看到它：{“产品”：[{“pid”：“1”，“名称”：“sid”}]，{“产品”：[{“pid”：“1”，“名称”：“sid”}，{“pid”：“2”，“name”：“shef”}sry请检查Json格式，您的解析错误[“true”，“product”：[{“pid”：“1”，“name”：“sid”}]，“success”：1}，{“product”：[{“pid”：“2”，“name”：“shef”}]，“success”：1}[“true”，“product”：{“pid”：“2”，“name”：“shef”}，“success”：1}]返回此消息。没有帮助。：/预期的O/p是什么？[“true”，{“product”：“pid”；“name”：“id”；“sid”成功：1}，{“产品”：[{“pid”：“2”‌​“，”name“：”shef“}]，”success“：1}]@Irfan，为我上面的ans json添加代码段。谢谢，基本上我只需要pid和名称！问题是如何：“：P[”true“，{”pid“：”1”，“name“：”sid“}，{”pid“：”2”，“name“：”shef“}]这样正确吗？
09-07 14:54:00.285: D/AbsListView(10521): Get MotionRecognitionManager
09-07 14:54:00.290: D/ProgressBar(10521): setProgress = 0
09-07 14:54:00.290: D/ProgressBar(10521): setProgress = 0, fromUser = false
09-07 14:54:00.290: D/ProgressBar(10521): mProgress = 0mIndeterminate = false, mMin = 0, mMax = 10000
09-07 14:54:00.310: D/AbsListView(10521): onVisibilityChanged() is called, visibility : 4
09-07 14:54:00.310: D/AbsListView(10521): unregisterIRListener() is called 
09-07 14:54:00.310: D/AbsListView(10521): onVisibilityChanged() is called, visibility : 0
09-07 14:54:00.310: D/AbsListView(10521): unregisterIRListener() is called 
09-07 14:54:00.335: D/ProgressBar(10521): updateDrawableBounds: left = 0
09-07 14:54:00.335: D/ProgressBar(10521): updateDrawableBounds: top = 0
09-07 14:54:00.335: D/ProgressBar(10521): updateDrawableBounds: right = 96
09-07 14:54:00.335: D/ProgressBar(10521): updateDrawableBounds: bottom = 96
09-07 14:54:00.395: D/AbsListView(10521): unregisterIRListener() is called 
09-07 14:54:00.445: D/AbsListView(10521): unregisterIRListener() is called 
09-07 14:54:00.520: D/All Products:(10521): ["true",{"product":[{"pid":"1","name":"sid"}],"success":1},{"product":[{"pid":"2","name":"shef"}],"success":1}]
09-07 14:54:00.520: W/System.err(10521): org.json.JSONException: No value for true
09-07 14:54:00.525: W/System.err(10521):    at org.json.JSONObject.get(JSONObject.java:354)
09-07 14:54:00.525: W/System.err(10521):    at org.json.JSONObject.getJSONArray(JSONObject.java:548)
09-07 14:54:00.525: W/System.err(10521):    at com.example.jsontry.AllProductsActivity$LoadAllProducts.doInBackground(AllProductsActivity.java:104)
09-07 14:54:00.525: W/System.err(10521):    at com.example.jsontry.AllProductsActivity$LoadAllProducts.doInBackground(AllProductsActivity.java:1)
09-07 14:54:00.525: W/System.err(10521):    at android.os.AsyncTask$2.call(AsyncTask.java:287)
09-07 14:54:00.525: W/System.err(10521):    at java.util.concurrent.FutureTask.run(FutureTask.java:234)
09-07 14:54:00.525: W/System.err(10521):    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
09-07 14:54:00.525: W/System.err(10521):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
09-07 14:54:00.525: W/System.err(10521):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
09-07 14:54:00.525: W/System.err(10521):    at java.lang.Thread.run(Thread.java:841)
09-07 14:54:00.760: D/AbsListView(10521): unregisterIRListener() is called 
09-07 14:54:00.890: D/AbsListView(10521): onDetachedFromWindow

{"product":[{"pid":"1","name":"sid"},{"pid":"2‌​","name":"shef"}],"success":"1","value":"true"}

                   JSONArray productDetailsJsonArr = reader.getJSONArray("product");
                   for (int i = 0; i < productDetailsJsonArr.length(); i++) {
                        JSONObject pJsonObj = productDetailsJsonArr.getJSONObject(i);
                        String pid = pJsonObj.getString("pid");
                        String sid = pJsonObj.getString("sid");
                    }

                    String success = reader.getString("success");
                    String value = reader.getString("value");

while($row = $stmt->fetch(PDO::FETCH_ASSOC))
{

        $product = array();
        $product["pid"] = $row["pid"];
        $product["name"] = $row["name"];
        $response["product"] = $product;
        unset($product);
 }
    $response["success"] = 1;
    $json[]= $response;