显示响应表单WCF
本文关键字:WCF 表单 响应 显示 | 更新日期: 2023-09-27 18:14:22
我编写了一个Restful WCF服务,并将其部署在IIS上。我一直试图使用AsyncTask
线程消费WCF服务。我在主UI类中构建了线程,这样我就可以更新GUI。
public class ServiceRunning extends AsyncTask<String, Void, String>{
private Exception exception;
String line = "";
public void setLine(String line)
{
this.line = line;
}
public String getLine()
{
return line;
}
@Override
protected String doInBackground(String... url) {
try
{
DefaultHttpClient httpClient = new DefaultHttpClient();
URI uri = new URI(url[0]);
HttpGet httpget = new HttpGet(uri);
httpget.setHeader("Accept", "application/json");
httpget.setHeader("Content-type", "application/json; charset=utf-8");
HttpResponse response = httpClient.execute(httpget);
HttpEntity responseEntity = response.getEntity();
BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
// while ((line = rd.readLine()) != null) {
// Log.d("****Status Line***", "Webservice: " + line);
// }
while((line = rd.readLine()) != null)
{
setLine(line);
Log.d("****Status Line***", "Webservices: " + getLine());
}
}
catch (Exception e)
{
e.printStackTrace();
}
return "String :" + line;
}
protected void onPostExecute(String result) {
TextView txt = (TextView)findViewById(R.id.textView1);
txt.setText(getLine());
}
}
在代码中,我将响应写入String,并尝试在执行后显示它。对于一些声音,当我运行程序时,我没有得到响应,我得到一个空白的TextView,但消息显示在Eclipse LogCat
中。我找不到问题,是什么原因?
AsyncTask绑定到启动它的活动。如果你旋转设备,或者应用进入后台,被添加或从基座上移除,原始的活动就会被破坏。AsyncTask继续运行,并响应不再可见的原始活动。
你最好使用IntentService或Service来调用web服务,这是一个更可靠的模式。