我正在为一个Android项目做一个Get和Post方法，我需要将HttpClient 3.x“翻译”到HttpClient 4.x（由android使用）。我的问题是，我不确定我做了什么，我找不到某些方法的“翻译”......
这是我做过的HttpClient 3.x和（ - >）HttpClient 4.x“翻译”如果我找到了它（只有那些问我问题的人）：
HttpState state = new HttpState (); --> ?
HttpMethod method = null; --> HttpUriRequest httpUri = null;
method.abort(); --> httpUri.abort(); //httpUri is a HttpUriRequest
method.releaseConnection(); --> conn.disconnect(); //conn is a HttpURLConnection
state.clearCookies(); --> cookieStore.clear(); //cookieStore is a BasicCookieStore
HttpClient client = new HttpClient(); --> DefaultHttpClient client = new DefaultHttpClient();
client.getHttpConnectionManager().getParams().setConnectionTimeout(SOCKET_TIMEOUT) --> HttpConnectionParams.setConnectionTimeout(param, SOCKET_TIMEOUT);
client.setState(state); --> ?
client.getParams().setCookiePolicy(CookiePolicy.RFC_2109); --> HttpClientParams.setCookiePolicy(param, CookiePolicy.RFC_2109);
PostMethod post = (PostMethod) method; --> ?
post.setRequestHeader(...,...); --> conn.setRequestProperty(...,...);
post.setFollowRedirects(false); --> conn.setFollowRedirects(false);
RequestEntity tmp = null; --> ?
tmp = new StringRequestEntity(...,...,...); --> ?
int statusCode = client.executeMethod(post); --> ?
String ret = method.getResponsBodyAsString(); --> ?
Header locationHeader = method.getResponseHeader(...); --> ?
ret = getPage(...,...); --> ?
我不知道这是否正确。这导致了问题，因为包的命名方式不同，也有一些方法。我只需要文档（我还没有找到）并且没什么帮助。
以下是HttpClient 4 docs，这是Android正在使用的（4，而不是3，从1.0-> 2.x）。文档很难找到（感谢Apache;））因为HttpClient现在是HttpComponents的一部分（如果你只是寻找HttpClient，你通常会得到3.x的东西）。
此外，如果您执行任意数量的请求，则不希望一遍又一遍地创建客户端。相反，作为tutorials for HttpClient note，创建一次客户端并保持它。从那里使用ThreadSafeConnectionManager。
我使用了一个辅助类，例如HttpHelper（它仍然是一个移动目标 - 我计划在某个时候将它移动到它自己的Android util项目，并且支持二进制数据，还没有到达那里），以帮助这个。助手类创建客户端，并具有get / post / etc的便利包装方法。无论你从Activity使用这个类，你应该创建一个内部内部AsyncTask（这样你就不会在发出请求时阻止UI线程），例如：
private class GetBookDataTask extends AsyncTask<String, Void, Void> {
private ProgressDialog dialog = new ProgressDialog(BookScanResult.this);
private String response;
private HttpHelper httpHelper = new HttpHelper();
// can use UI thread here
protected void onPreExecute() {
dialog.setMessage("Retrieving HTTP data..");
dialog.show();
}
// automatically done on worker thread (separate from UI thread)
protected Void doInBackground(String... urls) {
response = httpHelper.performGet(urls[0]);
// use the response here if need be, parse XML or JSON, etc
return null;
}
// can use UI thread here
protected void onPostExecute(Void unused) {
dialog.dismiss();
if (response != null) {
// use the response back on the UI thread here
outputTextView.setText(response);
}
}
}
回答我问题的最简单方法是向您展示我所做的课程：
public class HTTPHelp{
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
private boolean abort;
private String ret;
HttpResponse response = null;
HttpPost httpPost = null;
public HTTPHelp(){
}
public void clearCookies() {
httpClient.getCookieStore().clear();
}
public void abort() {
try {
if(httpClient!=null){
System.out.println("Abort.");
httpPost.abort();
abort = true;
}
} catch (Exception e) {
System.out.println("HTTPHelp : Abort Exception : "+e);
}
}
public String postPage(String url, String data, boolean returnAddr) {
ret = null;
httpClient.getParams().setParameter(ClientPNames.COOKIE_POLICY, CookiePolicy.RFC_2109);
httpPost = new HttpPost(url);
response = null;
StringEntity tmp = null;
httpPost.setHeader("User-Agent", "Mozilla/5.0 (X11; U; Linux " +
"i686; en-US; rv:1.8.1.6) Gecko/20061201 Firefox/2.0.0.6 (Ubuntu-feisty)");
httpPost.setHeader("Accept", "text/html,application/xml," +
"application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5");
httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded");
try {
tmp = new StringEntity(data,"UTF-8");
} catch (UnsupportedEncodingException e) {
System.out.println("HTTPHelp : UnsupportedEncodingException : "+e);
}
httpPost.setEntity(tmp);
try {
response = httpClient.execute(httpPost,localContext);
} catch (ClientProtocolException e) {
System.out.println("HTTPHelp : ClientProtocolException : "+e);
} catch (IOException e) {
System.out.println("HTTPHelp : IOException : "+e);
}
ret = response.getStatusLine().toString();
return ret;
}
}
我用this tutorial做我的post方法和thoses examples
那么，你可以找到关于那个版本的HTTPClient here的文档;通过它们出现的example scenarios特别有用。
遗憾的是，我不知道HTTPClient的第3版，所以我不能给出直接的等价;我建议你采取你想做的事情，并通过他们的示例场景。
package com.service.demo;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class WebServiceDemoActivity extends Activity
{
/** Called when the activity is first created. */
private static String SOAP_ACTION1 = "http://tempuri.org/GetSubscriptionReportNames";//"http://tempuri.org/FahrenheitToCelsius";
private static String NAMESPACE = "http://tempuri.org/";
private static String METHOD_NAME1 = "GetSubscriptionReportNames";//"FahrenheitToCelsius";
private static String URL = "http://icontrolusa.com:8040/iPhoneService.asmx?WSDL";
Button btnFar,btnCel,btnClear;
EditText txtFar,txtCel;
ArrayList<String> headlist = new ArrayList<String>();
ArrayList<String> reportlist = new ArrayList<String>();
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btnFar = (Button)findViewById(R.id.btnFar);
btnCel = (Button)findViewById(R.id.btnCel);
btnClear = (Button)findViewById(R.id.btnClear);
txtFar = (EditText)findViewById(R.id.txtFar);
txtCel = (EditText)findViewById(R.id.txtCel);
btnFar.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
//Initialize soap request + add parameters
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME1);
//Use this to add parameters
request.addProperty("Fahrenheit",txtFar.getText().toString());
//Declare the version of the SOAP request
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.setOutputSoapObject(request);
envelope.dotNet = true;
try {
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
//this is the actual part that will call the webservice
androidHttpTransport.call(SOAP_ACTION1, envelope);
// Get the SoapResult from the envelope body.
SoapObject result = (SoapObject)envelope.bodyIn;
if(result != null)
{
//Get the first property and change the label text
txtCel.setText(result.getProperty(0).toString());
Log.e("err ","output is :::: "+result.getProperty(0).toString());
parseSON();
}
else
{
Toast.makeText(getApplicationContext(), "No Response",Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
e.printStackTrace();
}
}
});
btnClear.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
txtCel.setText("");
txtFar.setText("");
}
});
}
private void parseSON() {
headlist.clear();
reportlist.clear();
String text = txtCel.getText().toString() ;//sb.toString();
Log.i("######", "###### "+text);
try{
JSONObject jobj = new JSONObject(text);
JSONArray jarr = jobj.getJSONArray("Head");
for(int i=0;i<jarr.length();i++){
JSONObject e = jarr.getJSONObject(i);
JSONArray names = e.names();
for(int j=0;j<names.length();j++){
String tagname = names.getString(j);
if (tagname.equals("ReportID")) {
headlist.add(e.getString("ReportID"));
}
if (tagname.equals("ReportName")) {
reportlist.add(e.getString("ReportName"));
}
}
}
} catch(JSONException e){
Log.e("retail_home", "Error parsing data "+e.toString());
}
Log.d("length ", "head lenght "+headlist.size());
Log.d("value is ", "frst "+headlist.get(0));
Log.d("length ", "name lenght "+reportlist.size());
Log.d("value is ", "secnd "+reportlist.get(0));
}
}