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 httpClient = new DefaultHttpClient();
public void postNoResult(final Context context, final String url, final Map<String, String> maps, final String show) {
 new Thread() {
  @Override
  public void run() {
   try {
    HttpPost post = new HttpPost(url);
    List<NameValuePair> params = new ArrayList<NameValuePair>();
    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<String, String> maps, final String show) {
 new Thread() {
  @Override
  public void run() {
   try {
    HttpPost post = new HttpPost(url);
    List<NameValuePair> params = new ArrayList<NameValuePair>();
    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();
}

来源：http://blog.csdn.net/demonliuhui/article/details/53255956