JSONObject解析引发java.lang.OutOfMemoryError问题

private void parseByJsonObject(String jsonStr) {
try {
JSONObject obj = new JSONObject(jsonStr);
int code = obj.isNull("code") ? 0 : obj.getInt("code");
JSONArray datas = obj.isNull("data") ? new JSONArray() : obj.getJSONArray("data");
int length = datas.length();
List<Person> persons = new ArrayList<Person>(length);
for (int i = 0; i < length; i++) {
JSONObject data = (JSONObject) datas.get(i);
int id = data.isNull("id") ? 0 : data.getInt("id");
String name = data.isNull("name") ? "" : data.getString("name");
Person person = new Person();
person.setId(id);
person.setName(name);
persons.add(person);
}
// 输出     code=0;persons=[{"id":0,"name":"Doe",}, {"id":2,"name":"Sam",}]
Log.e("scrat", "code="+code + ";persons="+persons.toString());
} catch (JSONException e) {
e.printStackTrace();
}
}

@SuppressLint("NewApi")
private void parseByJsonReader(String jsonStr) throws IOException {
JsonReader jsonReader = null;
InputStream in = null;
Reader reader = null;
try {
in = new ByteArrayInputStream(jsonStr.getBytes());
reader = new InputStreamReader(in, "UTF-8");
jsonReader = new JsonReader(reader);

int code = 0;
List<Person> persons = new ArrayList<Person>();
jsonReader.beginObject();
while (jsonReader.hasNext()) {
String tmpName1 = jsonReader.nextName();
if ("code".equals(tmpName1)) {
code = jsonReader.nextInt();
} else if ("data".equals(tmpName1)) {
jsonReader.beginArray();
while (jsonReader.hasNext()) {
int id = 0;
String name = null;
jsonReader.beginObject();
while (jsonReader.hasNext()) {
String tmpName2 = jsonReader.nextName(); // 一定要放到 jsonReader.peek()的判断前面, 否则判断NULL无效
if (jsonReader.peek() == JsonToken.NULL) {
jsonReader.skipValue();
continue;
}
if ("id".equals(tmpName2)) {
id = jsonReader.nextInt();
} else if ("name".equals(tmpName2)) {
name = jsonReader.nextString();
} else {
jsonReader.skipValue();
}
}
jsonReader.endObject();
Person person = new Person();
person.setId(id);
person.setName(name);
persons.add(person);
}
jsonReader.endArray();
} else {
jsonReader.skipValue();
}
}
jsonReader.endObject();
Log.e("scrat", "code="+code + ";persons="+persons.toString());
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} finally {
if (reader != null) {
reader.close();
}
if (in != null) {
in.close();
}
if (jsonReader != null) {
jsonReader.close();
}
}
}