我正在开发一款Android应用程序,用于获取名为“WebUntis”的Web服务的JSON内容。我获取到的JSON内容如下:
{"jsonrpc":"2.0","id":"req-002",
"result":[
{"id":125043,"date":20110117,"startTime":800,"endTime":850,
"kl":[{"id":71}],
"te":[{"id":23}],
"su":[{"id":13}],
"ro":[{"id":1}]},
{"id":125127,"date":20110117,"startTime":1055,"endTime":1145,
"kl":[{"id":71}],
"te":[{"id":41}],
"su":[{"id":19}],
"ro":[{"id":31}]},
...]}
正如您在结果数组中看到的那样,还有其他类似“kl”、“su”和“ro”的数组。
我正在获取这些数组的内容,然后将它们存储在一个ArrayList中。但是当其中一个数组为空时,比如;
{"jsonrpc":"2.0","id":"req-002",
"result":[
{"id":125043,"date":20110117,"startTime":800,"endTime":850,
"**kl":[]**,
"te":[{"id":23}],
"su":[{"id":13}],
"ro":[{"id":1}]},
{"id":125127,"date":20110117,"startTime":1055,"endTime":1145,
"kl":[{"id":71}],
"te":[{"id":41}],
"su":[{"id":19}],
"ro":[{"id":31}]},
...]}
我一直遇到 IndexOutOfRangeException
错误,但是我一直告诉它不要处理空数组,这是我尝试过的方法:
JSONObject jsonResult = new JSONObject(s);
// Get the result object
JSONArray arr = jsonResult.getJSONArray("result");
for (int i = 0; i < arr.length(); i++) {
JSONObject c = arr.getJSONObject(i);
anfangStunde[i] = c.getString("startTime");
endeStunde[i] = c.getString("endTime");
// get the jsonarrays (kl, su, ro)
kl = c.getJSONArray("kl");
su = c.getJSONArray("su");
ro = c.getJSONArray("ro");
// check if kl is not null
if(kl != null){
klassenID[i] = kl.getJSONObject(0).getString("id");
}
if (klassenID[i] != null) {
klasse = webuntis.klassenMap.get(klassenID[i]);
Log.d("ID und Klasse=", "" + klassenID[i] + ";" + klasse);
}
// get th ids
fachID[i] = su.getJSONObject(0).getString("id");
if (fachID[i] != null) {
fach = webuntis.faecherMap.get(fachID[i]);
Log.d("ID und Fach=", "" + fachID[i] + ";" + fach);
}
// "Start;Ende;Klasse;Fach;Raum" store in arraylist
webuntis.stundenPlan.add(anfangStunde[i] + ";" + endeStunde[i] + ";" + klasse + ";" + fach);
// Write Data into a file for offline use:
}
有人可以帮助我吗?
if(kl != null && kl.length() > 0 ){
简单易懂。 - marlonpya