JSON数组和Android列表视图不工作

问题描述：

行，所以我有一个PHP脚本：

Ok so i have a php script:

<?php
  mysql_connect("localhost","root","root");
  mysql_select_db("FYP");
  $sql=mysql_query("select team_name, games_played, games_won,
  games_drawn, games_lost, goals_for, goals_against, goal_difference, 
  current_points from Team where team_name='Man Utd'");
  while($row=mysql_fetch_assoc($sql)) $output[]=$row;
  print(json_encode($output));
  mysql_close();
?>

这是我的查询DB和返回匹配查询的所有行等等等等，然后连接codeS它变成JSON，看起来像这样：

that queries my db and returns all the rows matching the query etc etc, then encodes it into JSON, that looks like this:

[
    {
        "team_name": "Man City",
        "games_played": "24",
        "games_won": "18",
        "games_drawn": "3",
        "games_lost": "3",
        "goals_for": "63",
        "goals_against": "19",
        "goal_difference": "44",
        "current_points": "57"
    },
    {
        "team_name": "Man Utd",
        "games_played": "24",
        "games_won": "17",
        "games_drawn": "4",
        "games_lost": "3",
        "goals_for": "59",
        "goals_against": "24",
        "goal_difference": "35",
        "current_points": "55"
    }
]

而据我所知，是JSON对象的数组。然而，当我把这个数组显示为我的应用程序列表，我工作过的教程需要它是一个JSONObject，而不是一个JSONArray。我试图修改code采取和数组，但我有没有运气，谁能帮助？ Android的啧啧为：的http://p-xr.com/android-tutorial-how-to-parse-read-json-data-into-a-android-listview/

我遇到麻烦的主要部分是此行code的：

The main part i'm having trouble with is this line of code:

    JSONArray  earthquakes = json.getJSONArray("earthquakes");

显然，我的JSON不具备的元素标识符，如样品确实，当我删除该行这是行不通的。任何帮助将是辉煌的，谢谢！

Obviously my JSON doesn't have the element identifier like the sample does, and when i remove that line it doesn't work. Any help would be brilliant, Thanks!

答

当你的JSON结果字符串是合法的，似乎该应用程序（如果该教程为蓝本）期待一个对象作为外壳，这样的事情：

While your JSON result string is legit, it seems that the app (if modeled after the tutorial) is expecting an object as the outer enclosure, something like this:

{ "teams":
[
    {
        "team_name": "Man City",
        "games_played": "24",
        "games_won": "18",
        "games_drawn": "3",
        "games_lost": "3",
        "goals_for": "63",
        "goals_against": "19",
        "goal_difference": "44",
        "current_points": "57"
    },
    {
        "team_name": "Man Utd",
        "games_played": "24",
        "games_won": "17",
        "games_drawn": "4",
        "games_lost": "3",
        "goals_for": "59",
        "goals_against": "24",
        "goal_difference": "35",
        "current_points": "55"
    }
]
}

（利用的一个对象作为外壳），这种格式实际上是$ Web服务之间的公共P $ ptty返回JSON / JSONP。

This format (of utilizing an object as the outer enclosure) is actually pretty common among web services that return JSON/JSONP.

更新
每这，外必须是一个对象。在我的答案使用推荐的结构，你的线路是：

Update Per this, the outer has to be an object. Using the recommended structure in my answer, your line would be:

JSONArray  teams = json.getJSONArray("teams");

JSON数组和Android列表视图不工作

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