作者：mobiledu2502859233 | 来源：互联网 | 2022-02-17 12:19
Android异常详情介绍
这种异常我遇到以下两种情况：
1. java.lang.IllegalStateException: No wrapped connection.
2.java.lang.IllegalStateException: Adapter is detached.
原因：
1.单线程一次执行一个请求可以正常执行，如果使用多线程，同时执行多个请求时就会出现连接超时.
2.HttpConnection没有连接池的概念，多少次请求就会建立多少个IO，在访问量巨大的情况下服务器的IO可能会耗尽。
3.通常是因为HttpClient访问单一实例的不同的线程或未关闭InputStream的httpresponse。
解决方案：获得httpclient线程安全
解决前代码：
public HttpClient httpClient = new DefaultHttpClient();
public void postNoResult(final Context context, final String url, final Map maps, final String show) {
new Thread() {
@Override
public void run() {
try {
HttpPost post = new HttpPost(url);
List params = new ArrayList();
for (String key : maps.keySet()) {
params.add(new BasicNameValuePair(key, maps.get(key)));
}
post.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
HttpResponse respOnse= httpClient.execute(post);//报错位置
if (response.getStatusLine().getStatusCode() == 200) {
Looper.prepare();
String r = EntityUtils.toString(response.getEntity());
ToastUtil.print_log(r);
if (show != null) {
ToastUtil.show(context, show);
}
Looper.loop();}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}}}.start();
}
解决后代码：
public HttpClient httpClient = getThreadSafeClient();//获得httpclient线程安全。
public static DefaultHttpClient getThreadSafeClient() {
//获得httpclient线程安全的方法
DefaultHttpClient client = new DefaultHttpClient();
ClientConnectionManager mgr = client.getConnectionManager();
HttpParams params = client.getParams();
client = new DefaultHttpClient(new ThreadSafeClientConnManager(params,
mgr.getSchemeRegistry()), params);
return client;
}
public void postNoResult(final Context context, final String url, final Map maps, final String show) {
new Thread() {
@Override
public void run() {
try {
HttpPost post = new HttpPost(url);
List params = new ArrayList();
for (String key : maps.keySet()) {
params.add(new BasicNameValuePair(key, maps.get(key)));
}
post.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
HttpResponse respOnse= httpClient.execute(post);//报错位置
if (response.getStatusLine().getStatusCode() == 200) {
Looper.prepare();
String r = EntityUtils.toString(response.getEntity());
ToastUtil.print_log(r);
if (show != null) {
ToastUtil.show(context, show);
}
Looper.loop();}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}}}.start();
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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