运行我的应用程序时，我在logcat上收到以下错误。在进行一些研究之后，我遇到了很多错误。但是，这个我无法弄清楚：
03-04 02:52:29.475: E/JustDealsUtils(1913): Error parsing to json on getJarrayFromString(); org.json.JSONException: Expected ':' after result at character 8 of {result}
编辑1：
现在的错误是：
Error parsing to json on getJarrayFromString(); org.json.JSONException: Value result of type java.lang.String cannot be converted to JSONArray
与此相关的是fillproductlist（）
的错误这是我的Java代码：
public void onTaskCompleted(String result) {
try {
if(result!=""){
// the remote php link
// converting the response into json array
Log.i(DEBUG, result);
jarray = utils.getJarrayFromString(result);
// number of rows in total for a query
int mysqlSize = (jarray.getJSONObject(0).getInt("numRows"));
Log.i(DEBUG, "From " + from + " to " + mysqlSize);
// to check if all the rows are parsed from the mysql
if(from <= mysqlSize){
int rows;
// to check if there is 0
if(jarray.length()>0){
Log.i(DEBUG, "From " + from + " to " + Math.floor(mysqlSize/nr)*nr);
if(from+5<=Math.floor(mysqlSize/nr)*nr){
rows = jarray.length();
}else{
rows = mysqlSize%nr+1;
Utils.IS_ENDED_PRODUCT_LIST = true;
}
ArrayList<String> list = new ArrayList<String>();
for(int i=1; i<rows; i++){
JSONObject row = jarray.getJSONObject(i);
bid.add(row.getInt("bid"));
bTitle.add(row.getString("bTitle"));
bCode.add(row.getString("bCode"));
bPrice.add(row.getString("bPrice") + "£");
bDescription.add(row.getString("bDescription"));
bModule.add(row.getString("bModule"));
bImage.add(Utils.PATH + row.getString("bImage"));
list.add(row.getString("bImage"));
// to check if an id already exists in the db or to create one if doesn't exist
if(!db.hasIDBooks(row.getInt("bid"))) db.createRowOnBooks(row.getInt("bid"), row.getString("bTitle"), row.getString("bCode"), row.getString("bPrice"), row.getString("bDescription"), row.getString("bModule"), Utils.PATH + row.getString("bImage"), row.getString("bSpecialOffer"), row.getInt("bSpecialDiscount"), row.getString("bDateAdded"));
Log.i(DEBUG, row.getString("bDescription"));
}
new DownloadImages(list, bAdapter).execute();
}
}
postParameters.removeAll(postParameters);
}else{
Utils.IS_ENDED_PRODUCT_LIST = true;
if(rlLoading.isShown()){
rlLoading.startAnimation(fadeOut());
rlLoading.setVisibility(View.INVISIBLE);
}
}
} catch (Exception e) {
Log.e(DEBUG, "Error at fillProductList(): " + e.toString());
}
}
});
task.execute();
}else{
// if internet connectio is not available
// then, rows will be fetched from the local sqllite database stored on the android phone
if(db.size(justdealsDatabase.TABLE_BOOKS) > 0){
Cursor cursor = db.getBooksRows(justdealsDatabase.TABLE_BOOKS);
cursor.moveToFirst();
while(!cursor.isAfterLast()){
bid.add(cursor.getInt(cursor.getColumnIndex(justdealsDatabase.KEY_BID)));
bTitle.add(cursor.getString(cursor.getColumnIndex(justdealsDatabase.KEY_BTITLE)));
bCode.add(cursor.getString(cursor.getColumnIndex(justdealsDatabase.KEY_BCODE)));
bPrice.add(cursor.getString(cursor.getColumnIndex(justdealsDatabase.KEY_BPRICE))+ "£");
bDescription.add(cursor.getString(cursor.getColumnIndex(justdealsDatabase.KEY_BDESCRIPTION)));
bModule.add(cursor.getString(cursor.getColumnIndex(justdealsDatabase.KEY_BMODULE)));
bImage.add(cursor.getString(cursor.getColumnIndex(justdealsDatabase.KEY_BIMAGE)));
cursor.moveToNext();
}
bAdapter.notifyDataSetChanged();
Utils.IS_ENDED_PRODUCT_LIST = true;
}
}
}
MY JSON ARRAY CODE（完整编辑2）：
public String getJsonFromUrl(String url){
// to initialise the objects
InputStream is = null;
String result = "";
//making HTTP POST request
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(DEBUG, "Error getJsonFromUrl: " + e.toString());
}
// Converting to String
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while((line = reader.readLine()) != null){
sb.append(line + "\n");
}
is.close();
result=sb.toString();
}catch(Exception e){
Log.e(DEBUG, "Error converting the response to string getJsonFromUrl: " + e.toString());
}
return result;
}
/**
* To convert the string recieved into json object
* result refers to the string that will be converted
* @return will return the json array
*/
public JSONArray getJarrayFromString(String result){
// Parsing string to JSON Array
try{
jarray = new JSONArray("result");
}catch(JSONException e){
Log.e(DEBUG, "Error parsing to json on getJarrayFromString(); " + e.toString());
}
return jarray;
}
我的PHP API（编辑1）：
<?php
include("MysqlConnection.php");
header('Content-Type: application/json');
$from = $_POST["from"];
$nr = $_POST["nr"];
// those variables are for search
$title = $_POST["title"];
$code = $_POST["code"];
$price = $_POST["price"];
$module = $_POST["module"];
$order = $_POST["order"];
$by = $_POST["by"];
$sql = "SET CHARACTER SET utf8";
$db->query($sql);
// if those 2 var are set then we order the query after them
if(isset($order) && isset($by)){
$sql .= " ORDER BY `$order` $by LIMIT $from, $nr";
}else{
$sql .= "LIMIT $from, $nr";
}
$query = $db->query($sql);
$rows = array();
$rows[] = array("numRows"=>$db->numRows($query));
if($db->numRows($query)!=0){
while($row = mysql_fetch_assoc($query)) {
$rows[] = $row;
}
echo(json_encode($rows));
}
}
$db->closeConnection();
?>
我已经实施了你们推荐的所有建议，但仍然没有运气让这段代码工作!!!!
我不确定为什么“结果”字符串的值不能转换为JSONARRAY ????
我已经向您展示了JSON ARRAY声明，结果声明声明以及PHP（参见上面的编辑版本）
答案 0 :(得分：1)
您必须使用echo而不是print_r
echo json_encode($rows);
print_r以数组格式提供输出。
答案 1 :(得分：0)
您已经发送了两次结果，您必须只使用编码发送一次结果 删除以下代码并尝试
echo json_encode($rows);
答案 2 :(得分：0)
也许您应该在没有“{}”符号的情况下命名数组？
jarray = new JSONArray("result");
而不是
jarray = new JSONArray("{result}");