Android – Retrieve InputStream from Web through HTTP
-
Paresh Mayani
- June 20, 2011
- 1 min read
- 2 Comments
In almost all the normal application, we have to make a WebService call to fetch response and display it. Here is a snippet to make a call on web to fetch/retrieve the response. It will fetch the InputStream and if you want to display result as a string then you have to convert InputStream into String.
Problem: How to retrieve/get InputStream from Web through HTTP?
Solution:
private InputStream retrieveStream(String url) {
DefaultHttpClient client = new DefaultHttpClient();
HttpGet httpRequest = new HttpGet(url);
try {
HttpResponse httpResponse = client.execute(httpRequest);
final int statusCode = httpResponse.getStatusLine().getStatusCode();
if (statusCode != HttpStatus.SC_OK) {
Log.w(getClass().getSimpleName(),
"Error => " + statusCode + " => for URL " + url);
return null;
}
HttpEntity httpEntity = httpResponse.getEntity();
return httpEntity.getContent();
}
catch (IOException e) {
httpRequest.abort();
Log.w(getClass().getSimpleName(), "Error for URL =>" + url, e);
}
return null;
}
For example:
I included retrieveStream() and iStream_to_String() in my Activity class, and then I wrote the below code to fetch response. In short, in above function you just have to just pass the URL from which you want to retrieve response.
InputStream is = retrieveStream(myURL);
System.out.println("Retrieved strings => "+iStream_to_String(is));
