问题描述
我工作的HTTP GET Android上的要求。
我收到了巨大的来自服务器的JSON数据量,一串无法处理或存储数据,并得到了OutOfMemory异常。
然后我试图将其保存在ArrayList的其中一个最大Integer.Maximum值可以存储。
但它越来越OutOfMemory例外,而在8970〜存储位置。
下面是我的链接有JSON数据。
的
这是我的code:
的ArrayList<串GT; newarr =新的ArrayList<串GT;();
尝试{ 网址URL =新的URL(urlFilePath);
HttpURLConnection类的URLConnection =(HttpURLConnection类)网址
.openConnection(); urlConnection.setRequestMethod(GET);
// urlConnection.setDoOutput(真); //连接
urlConnection.connect(); //流用于从因特网读取数据
为InputStream的InputStream = urlConnection.getInputStream(); //创建一个缓冲区...
字节[]缓冲区=新的字节[1024];
INT BufferLength中= 0;
诠释检查;
而(量(bufferLength = inputStream.read(缓冲液))大于0){
字符串德codeD =新的String(缓冲,0,BufferLength中);
newarr.add(德codeD); //内存溢出异常。
} fileOutput.close();
缓冲= NULL;
inputStream.close();
字符串路径= file.getAbsolutePath();
返回路径;
}赶上(最终MalformedURLException的E){
e.printStackTrace();
返回;
}赶上(最终IOException异常五){
e.printStackTrace();
返回;
}赶上(最终例外五){
的System.out.println(异常:+ e.getMessage());
e.printStackTrace();
返回;
}
您需要处理的数据流,而不是直接把它作为一个字符串。看GSON流器为例:
公开名单<消息> readJsonStream(以InputStream的)抛出IOException
JsonReader读者=新JsonReader(新InputStreamReader的(在UTF-8));
清单<消息>消息=新的ArrayList<消息>();
reader.beginArray();
而(reader.hasNext()){
消息消息= gson.fromJson(读卡器,Message.class);
messages.add(消息);
}
reader.endArray();
reader.close();
返回消息;
}
您可以在这里想起名单作为分析的结果。如果要显示它您还可以使用无论从任何 ListAdapter
您正在使用的列表中。
I am working on http get request on android.
I receive a huge amount of json data from server, a string is unable to handle or store that data and getting OutOfMemory Exception.
Then I tried to save it in arrayList which can store a maximum of Integer.Maximum value. but it is getting OutOfMemory exception while storing at ~8970 location.
Here is my link which has json data.
http://ec2-50-19-105-251.compute-1.amazonaws.com/ad/Upload/getitemlist10122013035042.txt
here is my code:
ArrayList<String> newarr = new ArrayList<String>();
try {
URL url = new URL(urlFilePath);
HttpURLConnection urlConnection = (HttpURLConnection) url
.openConnection();
urlConnection.setRequestMethod("GET");
// urlConnection.setDoOutput(true);
// connect
urlConnection.connect();
// Stream used for reading the data from the internet
InputStream inputStream = urlConnection.getInputStream();
// create a buffer...
byte[] buffer = new byte[1024];
int bufferLength = 0;
int check;
while ((bufferLength = inputStream.read(buffer)) > 0) {
String decoded = new String(buffer, 0, bufferLength);
newarr.add(decoded); // OutOfMemory Exception.
}
fileOutput.close();
buffer = null;
inputStream.close();
String path = file.getAbsolutePath();
return path;
} catch (final MalformedURLException e) {
e.printStackTrace();
return "";
} catch (final IOException e) {
e.printStackTrace();
return "";
} catch (final Exception e) {
System.out.println("EXCEPTION:: " + e.getMessage());
e.printStackTrace();
return "";
}
You need to process the stream directly instead of storing it as a String. Look at the Gson Stream Reader as an example:
public List<Message> readJsonStream(InputStream in) throws IOException {
JsonReader reader = new JsonReader(new InputStreamReader(in, "UTF-8"));
List<Message> messages = new ArrayList<Message>();
reader.beginArray();
while (reader.hasNext()) {
Message message = gson.fromJson(reader, Message.class);
messages.add(message);
}
reader.endArray();
reader.close();
return messages;
}
You can think of the List here as the parsed result. You could also use the list from whatever ListAdapter
you are using if you want to display it.
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