Android异常 java.lang.IllegalStateException解决方法

Android异常 java.lang.IllegalStateException解决方法

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 hnbwgeLMGttpClient = newhttp:// 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(nbwgeLMGnew 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();

}

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