如何在Android中使用简单的HTTP客户端？
如何使用如何在Android中使用简单的HTTP客户端？,android,http,Android,Http,如何使用AndroidHttpClient作为HTTP客户端连接到远程服务器？我无法在文档或互联网上找到好的示例。您可以这样使用： public static void connect(String url) { HttpClient httpclient = new DefaultHttpClient(); // Prepare a request object HttpGet httpget = new HttpGet(url); // Execute
AndroidHttpClientpublic static void connect(String url)
{
HttpClient httpclient = new DefaultHttpClient();
// Prepare a request object
HttpGet httpget = new HttpGet(url);
// Execute the request
HttpResponse response;
try {
response = httpclient.execute(httpget);
// Examine the response status
Log.i("Praeda",response.getStatusLine().toString());
// Get hold of the response entity
HttpEntity entity = response.getEntity();
// If the response does not enclose an entity, there is no need
// to worry about connection release
if (entity != null) {
// A Simple JSON Response Read
InputStream instream = entity.getContent();
String result= convertStreamToString(instream);
// now you have the string representation of the HTML request
instream.close();
}
} catch (Exception e) {}
}
private static String convertStreamToString(InputStream is) {
/*
* To convert the InputStream to String we use the BufferedReader.readLine()
* method. We iterate until the BufferedReader return null which means
* there's no more data to read. Each line will appended to a StringBuilder
* and returned as String.
*/
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
public static String executeHttpPost1(String url,
HashMap<String, String> postParameters) throws UnsupportedEncodingException {
// TODO Auto-generated method stub
HttpClient client = getNewHttpClient();
try{
request = new HttpPost(url);
}
catch(Exception e){
e.printStackTrace();
}
if(postParameters!=null && postParameters.isEmpty()==false){
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(postParameters.size());
String k, v;
Iterator<String> itKeys = postParameters.keySet().iterator();
while (itKeys.hasNext())
{
k = itKeys.next();
v = postParameters.get(k);
nameValuePairs.add(new BasicNameValuePair(k, v));
}
UrlEncodedFormEntity urlEntity = new UrlEncodedFormEntity(nameValuePairs);
request.setEntity(urlEntity);
}
try {
Response = client.execute(request,localContext);
HttpEntity entity = Response.getEntity();
int statusCode = Response.getStatusLine().getStatusCode();
Log.i(TAG, ""+statusCode);
Log.i(TAG, "------------------------------------------------");
try{
InputStream in = (InputStream) entity.getContent();
//Header contentEncoding = Response.getFirstHeader("Content-Encoding");
/*if (contentEncoding != null && contentEncoding.getValue().equalsIgnoreCase("gzip")) {
in = new GZIPInputStream(in);
}*/
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder str = new StringBuilder();
String line = null;
while((line = reader.readLine()) != null){
str.append(line + "\n");
}
in.close();
response = str.toString();
Log.i(TAG, "response"+response);
}
catch(IllegalStateException exc){
exc.printStackTrace();
}
} catch(Exception e){
Log.e("log_tag", "Error in http connection "+response);
}
finally {
}
return response;
}
public静态字符串executeHttpPost1（字符串url，
HashMap后参数）引发不支持的DencodingException{
//TODO自动生成的方法存根
HttpClient=getNewHttpClient（）；
试一试{
请求=新的HttpPost（url）；
}
捕获（例外e）{
e、 printStackTrace（）；
}
if（postParameters！=null&&postParameters.isEmpty（）==false）{
List nameValuePairs=新的ArrayList（postParameters.size（））；
串k，v；
迭代器itKeys=postParameters.keySet（）.Iterator（）；
while（itKeys.hasNext（））
{
k=itKeys.next（）；
v=后参数get（k）；
添加（新的BasicNameValuePair（k，v））；
}
UrlEncodedFormEntity UrleEntity=新的UrlEncodedFormEntity（nameValuePairs）；
request.setEntity（urlEntity）；
}
试一试{
Response=client.execute（请求、本地上下文）；
HttpEntity=Response.getEntity（）；
int statusCode=Response.getStatusLine（）.getStatusCode（）；
Log.i（标记“+”状态代码）；
Log.i（标记“------------------------------------------------------------”）；
试一试{
InputStream in=（InputStream）entity.getContent（）；
//Header contentEncoding=Response.getFirstHeader（“内容编码”）；
/*if（contentEncoding！=null&&contentEncoding.getValue（）.equalsIgnoreCase（“gzip”））{
in=新的GZIPInputStream（in）；
}*/
BufferedReader reader=新的BufferedReader（新的InputStreamReader（in））；
StringBuilder str=新的StringBuilder（）；
字符串行=null；
而（（line=reader.readLine（））！=null）{
str.append（第+行“\n”）；
}
in.close（）；
response=str.toString（）；
Log.i（标签，“响应”+响应）；
}
捕获（非法状态异常exc）{
exc.printStackTrace（）；
}
}捕获（例外e）{
Log.e（“Log_标记”，“http连接错误”+响应）；
}
最后{
}
返回响应；
}
int count;
try {
URL url = new URL(f_url[0]);
URLConnection conection = url.openConnection();
conection.setConnectTimeout(TIME_OUT);
conection.connect();
// Getting file length
int lenghtOfFile = conection.getContentLength();
// Create a Input stream to read file - with 8k buffer
InputStream input = new BufferedInputStream(url.openStream(),
8192);
// Output stream to write file
OutputStream output = new FileOutputStream(
"/sdcard/9androidnet.jpg");
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
// After this onProgressUpdate will be called
publishProgress("" + (int) ((total * 100) / lenghtOfFile));
// writing data to file
output.write(data, 0, count);
}
// flushing output
output.flush();
// closing streams
output.close();
input.close();
} catch (SocketTimeoutException e) {
connectionTimeout=true;
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
你的lmgtfy吸引了很多“进攻性”旗帜。我强烈建议不要那样做，明白了。下次我会尽量避免它。要使GZIP、分块流等工作正常，请改用HttpClient和entity.writeTo（）。如果不使用HttpClient，蜂巢和更新版本将抛出
NetworkOnMainThreadException