在Android中解析JSON對象時出現錯誤

Question

任何人都知道如何解析此JSON響應。還告訴我為什么我在JSON響應中有[enter you code here] 。我不知道這行的來歷。

我的Logcat是：

  03-30 09:49:16.757: W/dalvikvm(13459): VFY: unable to resolve static method 604: Landroid/net/TrafficStats;.setThreadStatsTag (I)V
03-30 09:49:16.757: D/dalvikvm(13459): VFY: replacing opcode 0x71 at 0x000a
03-30 09:49:16.976: D/dalvikvm(13459): GC_CONCURRENT freed 206K, 47% free 2997K/5639K, external 507K/517K, paused 3ms+4ms
03-30 09:49:18.976: I/global(13459): Loaded time zone names for en_US in 1110ms.
03-30 09:49:18.992: D/RegisterActivity(13459): Register Response: [Enter code here]{"tag":"register","error":false,"uid":"5518cec863a130.84373662","user":{"name":"kku","email":"kkajhg.jun@gmail.com","created_at":"2015-03-30 00:19:20","updated_at":null}}

03-30 09:49:18.992: D/RegisterActivity(13459): <!-- Hosting24 Analytics Code -->

03-30 09:49:18.992: D/RegisterActivity(13459): <script type="text/javascript" src="http://stats.hosting24.com/count.php"></script>

03-30 09:49:18.992: D/RegisterActivity(13459): <!-- End Of Analytics Code -->

03-30 09:49:18.992: D/RegisterActivity(13459): user added
03-30 09:49:19.000: W/System.err(13459): org.json.JSONException: Unterminated array at character 8 of [Enter code here]{"tag":"register","error":false,"uid":"5518cec863a130.84373662","user":{"name":"kku","email":"kkajhg.jun@gmail.com","created_at":"2015-03-30 00:19:20","updated_at":null}}

03-30 09:49:19.000: W/System.err(13459): <!-- Hosting24 Analytics Code -->

03-30 09:49:19.000: W/System.err(13459): <script type="text/javascript" src="http://stats.hosting24.com/count.php"></script>

03-30 09:49:19.000: W/System.err(13459): <!-- End Of Analytics Code -->

03-30 09:49:19.000: W/System.err(13459):    at org.json.JSONTokener.syntaxError(JSONTokener.java:446)
03-30 09:49:19.007: W/System.err(13459):    at org.json.JSONTokener.readArray(JSONTokener.java:436)
03-30 09:49:19.007: W/System.err(13459):    at org.json.JSONTokener.nextValue(JSONTokener.java:99)
03-30 09:49:19.007: W/System.err(13459):    at org.json.JSONObject.<init>(JSONObject.java:154)
03-30 09:49:19.007: W/System.err(13459):    at org.json.JSONObject.<init>(JSONObject.java:171)
03-30 09:49:19.007: W/System.err(13459):    at com.example.classroom.RegisterActivity$3.onResponse(RegisterActivity.java:125)
03-30 09:49:19.007: W/System.err(13459):    at com.example.classroom.RegisterActivity$3.onResponse(RegisterActivity.java:1)
03-30 09:49:19.007: W/System.err(13459):    at com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:60)
03-30 09:49:19.007: W/System.err(13459):    at com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:30)
03-30 09:49:19.007: W/System.err(13459):    at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:99)
03-30 09:49:19.007: W/System.err(13459):    at android.os.Handler.handleCallback(Handler.java:587)
03-30 09:49:19.007: W/System.err(13459):    at android.os.Handler.dispatchMessage(Handler.java:92)
03-30 09:49:19.007: W/System.err(13459):    at android.os.Looper.loop(Looper.java:130)
03-30 09:49:19.007: W/System.err(13459):    at android.app.ActivityThread.main(ActivityThread.java:3687)
03-30 09:49:19.015: W/System.err(13459):    at java.lang.reflect.Method.invokeNative(Native Method)
03-30 09:49:19.015: W/System.err(13459):    at java.lang.reflect.Method.invoke(Method.java:507)
03-30 09:49:19.015: W/System.err(13459):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
03-30 09:49:19.015: W/System.err(13459):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
03-30 09:49:19.015: W/System.err(13459):    at dalvik.system.NativeStart.main(Native Method)
03-30 09:50:34.953: W/KeyCharacterMap(13459): Can't open keycharmap file
03-30 09:50:34.953: W/KeyCharacterMap(13459): Error loading keycharmap file
03-30 09:50:34.953: W/KeyCharacterMap(13459): Using default keymap
03-30 09:50:35.234: W/IInputConnectionWrapper(13459): showStatusIcon on inactive InputConnection
03-30 09:52:17.656: D/dalvikvm(13459): GC_EXPLICIT freed 216K, 47% free 3027K/5639K, external 507K/517K, paused 46ms

Register Response:是我的java代碼中logcat的文本。 對於您的信息，我正在使用凌空抽射。

我的用於解析json的java源代碼是：

pDialog.setMessage("Registering ...");
    showDialog();

    StringRequest strReq = new StringRequest(Method.POST,
            AppConfig.URL_REGISTER, new Response.Listener<String>() {

                @Override
                public void onResponse(String response) {
                    Log.d(TAG, "Register Response: " + response);
                    hideDialog();
                    try {
                        Log.d(TAG, "user added");


                        JSONObject jObj = new JSONObject(response);

                        boolean error = jObj.getBoolean("error");
                        if (!error) {
                            // User successfully stored in MySQL
                            // Now store the user in sqlite
                            String uid = jObj.getString("uid");

                            JSONObject user = jObj.getJSONObject("user");
                            String name = user.getString("name");
                            String email = user.getString("email");
                            String created_at = user
                                    .getString("created_at");

這是我的PHP代碼：

    index.php
<?php

/**
 * File to handle all API requests
 * Accepts GET and POST
 * 
 * Each request will be identified by TAG
 * Response will be JSON data

  /**
 * check for POST request 
 */
if (isset($_POST['tag']) && $_POST['tag'] != '') {
    // get tag
    $tag = $_POST['tag'];

    // include db handler
    require_once 'include/DB_Functions.php';
    $db = new DB_Functions();

    // response Array
    $response = array("tag" => $tag, "error" => FALSE);

    // check for tag type
    if ($tag == 'login') {
        // Request type is check Login
        $email = $_POST['email'];
        $password = $_POST['password'];

        // check for user
        $user = $db->getUserByEmailAndPassword($email, $password);
        if ($user != false) {
            // user found
            $response["error"] = FALSE;
            $response["uid"] = $user["unique_id"];
            $response["user"]["name"] = $user["name"];
            $response["user"]["email"] = $user["email"];
            $response["user"]["created_at"] = $user["created_at"];
            $response["user"]["updated_at"] = $user["updated_at"];
            echo json_encode($response);
        } else {
            // user not found
            // echo json with error = 1
            $response["error"] = TRUE;
            $response["error_msg"] = "Incorrect email or password!";
            echo json_encode($response);
        }
    } else if ($tag == 'register') {
        // Request type is Register new user
        $name = $_POST['name'];
        $email = $_POST['email'];
        $password = $_POST['password'];

        // check if user is already existed
        if ($db->isUserExisted($email)) {
            // user is already existed - error response
            $response["error"] = TRUE;
            $response["error_msg"] = "User already existed";
            echo json_encode($response);
        } else {
            // store user
            $user = $db->storeUser($name, $email, $password);
            if ($user) {
                // user stored successfully
                $response["error"] = FALSE;
                $response["uid"] = $user["unique_id"];
                $response["user"]["name"] = $user["name"];
                $response["user"]["email"] = $user["email"];
                $response["user"]["created_at"] = $user["created_at"];
                $response["user"]["updated_at"] = $user["updated_at"];
                echo json_encode($response);
            } else {
                // user failed to store
                $response["error"] = TRUE;
                $response["error_msg"] = "Error occured in Registartion";
                echo json_encode($response);
            }
        }
    } else {
        // user failed to store
        $response["error"] = TRUE;
        $response["error_msg"] = "Unknow 'tag' value. It should be either 'login' or 'register'";
        echo json_encode($response);
    }
    } else {
    $response["error"] = TRUE;
    $response["error_msg"] = "Required parameter 'tag' is missing!";
    echo json_encode($response);
    }
    ?>

Answer 1

您現在可以使用此代碼，此代碼現在將跳過[輸入您的代碼]

        response = response.split("]")[1];
        JSONObject jo = new JSONObject(response);
        String tag = jo.getString("tag");
        boolean error = jo.getBoolean("error");
        String uid = jo.getString("uid");
        JSONObject jo1 = jo.getJSONObject("user");
        String name = jo1.getString("name");
        String email = jo1.getString("email");
        String createdAt = jo1.getString("created_at");
        String updatedAt = jo1.getString("updated_at");

        System.out.println("Tag: " + tag + " error: " + error + " name: "
                + name + " email: " + email);

我認為在將數據從php編碼為JSON之前，您應該打印數據並檢查要發送的內容。 您可能發送了錯誤的數據，但不會干擾音量。