我是个新手，目前想在android app中发起一个简单的http请求，该请求到一个php页面左的网页上取一些数据，有没有可以通过后台运行去网站取数据并解析的功能？
第一步，把下面的代码加入到你的 manifest 文件中，目的是放开网络访问权限
<uses-permission android:name="android.permission.INTERNET" />
然后就可以使用 Apache http client 访问页面了，在android中非常的简单就能完成
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HttpClient
httpclient = new
DefaultHttpClient(); HttpResponse
response = httpclient.execute(new
HttpGet(URL)); StatusLine
statusLine = response.getStatusLine(); if(statusLine.getStatusCode()
== HttpStatus.SC_OK){ ByteArrayOutputStream
out = new
ByteArrayOutputStream(); response.getEntity().writeTo(out); out.close(); String
responseString = out.toString(); //..more
logic }
else{ //Closes
the connection. response.getEntity().getContent().close(); throw
new
IOException(statusLine.getReasonPhrase()); } |
如果你想在后台访问或者异步的方式运行，需要继承 AsyncTask，AsyncTask是专门单独线程跑后台任务的类
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class
RequestTask extends
AsyncTask<string, string=""
string,="">{ @Override protected
String doInBackground(String... uri) { HttpClient
httpclient = new
DefaultHttpClient(); HttpResponse
response; String
responseString = null; try
{ response
= httpclient.execute(new
HttpGet(uri[0])); StatusLine
statusLine = response.getStatusLine(); if(statusLine.getStatusCode()
== HttpStatus.SC_OK){ ByteArrayOutputStream
out = new
ByteArrayOutputStream(); response.getEntity().writeTo(out); out.close(); responseString
= out.toString(); }
else{ //Closes
the connection. response.getEntity().getContent().close(); throw
new
IOException(statusLine.getReasonPhrase()); } }
catch
(ClientProtocolException e) { //TODO
Handle problems.. }
catch
(IOException e) { //TODO
Handle problems.. } return
responseString; } @Override protected
void
onPostExecute(String result) { super.onPostExecute(result); //Do
anything with response.. }}</string,> |
最后你可以通过如下的方式调用
new RequestTask().execute("http://stackoverflow.com");
原文地址：http://www.itmmd.com/201410/91.html
原文地址：http://blog.csdn.net/androidmylove/article/details/42045913
