Android Series: GET, POST and Multipart POST requests
Posted by admin | Posted in Code Snippets, Mobile Development | Posted on 18-03-2010
56
Today I will describe shortly how to execute http GET and POST request on Android platform.
The code is very simple and straightforward, for post request with attachement, you would have to add apache-mime4j-0.6.jar and httpmime-4.0.1.jar to your build path.
HTTP GET
try {
HttpClient client = new DefaultHttpClient();
String getURL = "http://www.google.com";
HttpGet get = new HttpGet(getURL);
HttpResponse responseGet = client.execute(get);
HttpEntity resEntityGet = responseGet.getEntity();
if (resEntityGet != null) {
//do something with the response
Log.i("GET RESPONSE",EntityUtils.toString(resEntityGet));
}
} catch (Exception e) {
e.printStackTrace();
}
HttpClient client = new DefaultHttpClient();
String getURL = "http://www.google.com";
HttpGet get = new HttpGet(getURL);
HttpResponse responseGet = client.execute(get);
HttpEntity resEntityGet = responseGet.getEntity();
if (resEntityGet != null) {
//do something with the response
Log.i("GET RESPONSE",EntityUtils.toString(resEntityGet));
}
} catch (Exception e) {
e.printStackTrace();
}
HTTP POST
try {
HttpClient client = new DefaultHttpClient();
String postURL = "http://somepostaddress.com";
HttpPost post = new HttpPost(postURL);
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("user", "kris"));
params.add(new BasicNameValuePair("pass", "xyz"));
UrlEncodedFormEntity ent = new UrlEncodedFormEntity(params,HTTP.UTF_8);
post.setEntity(ent);
HttpResponse responsePOST = client.execute(post);
HttpEntity resEntity = responsePOST.getEntity();
if (resEntity != null) {
Log.i("RESPONSE",EntityUtils.toString(resEntity));
}
} catch (Exception e) {
e.printStackTrace();
}
HttpClient client = new DefaultHttpClient();
String postURL = "http://somepostaddress.com";
HttpPost post = new HttpPost(postURL);
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("user", "kris"));
params.add(new BasicNameValuePair("pass", "xyz"));
UrlEncodedFormEntity ent = new UrlEncodedFormEntity(params,HTTP.UTF_8);
post.setEntity(ent);
HttpResponse responsePOST = client.execute(post);
HttpEntity resEntity = responsePOST.getEntity();
if (resEntity != null) {
Log.i("RESPONSE",EntityUtils.toString(resEntity));
}
} catch (Exception e) {
e.printStackTrace();
}
HTTP POST with File attachment
File file = new File("path/to/your/file.txt");
try {
HttpClient client = new DefaultHttpClient();
String postURL = "http://someposturl.com";
HttpPost post = new HttpPost(postURL);
FileBody bin = new FileBody(file);
MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
reqEntity.addPart("myFile", bin);
post.setEntity(reqEntity);
HttpResponse response = client.execute(post);
HttpEntity resEntity = response.getEntity();
if (resEntity != null) {
Log.i("RESPONSE",EntityUtils.toString(resEntity));
}
} catch (Exception e) {
e.printStackTrace();
}
try {
HttpClient client = new DefaultHttpClient();
String postURL = "http://someposturl.com";
HttpPost post = new HttpPost(postURL);
FileBody bin = new FileBody(file);
MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
reqEntity.addPart("myFile", bin);
post.setEntity(reqEntity);
HttpResponse response = client.execute(post);
HttpEntity resEntity = response.getEntity();
if (resEntity != null) {
Log.i("RESPONSE",EntityUtils.toString(resEntity));
}
} catch (Exception e) {
e.printStackTrace();
}
Hope this helps!
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I don’t knwo how many tutorials I’ve done and I thought your example would work, but still the same error happened. It always stops on
HttpResponse response = client.execute(get);
Permissions to the internet I have in the manifest. Please help.
Sir,,
I have a problem in using MultipartEntity. my data is not getting saved in database , ,,,
But if i directly passing my variables in Url its get saved ,, tell me where is the Problem?????
http://xxxxxxxxx/api/index.php?method=postClassified&location=1
If you are passing params with the url it means you are using GET request, you would have to use POST for multipart requests.
try {
HttpClient client = new DefaultHttpClient();
String getURL = “http:192.168.1.5:8080/one/try.jsp”;
HttpGet get = new HttpGet(getURL);
HttpResponse responseGet = client.execute(get);
HttpEntity resEntityGet = responseGet.getEntity();
if (resEntityGet != null) {
//do something with the response
Log.i(“GET RESPONSE”,EntityUtils.toString(resEntityGet));
}
} catch (Exception e) {
TextView tv=new TextView(this);
tv.setText(e.getMessage());
setContentView(tv);
}
it displays host name may not be null
dun know wats wrong its been 3 days i am not able access jsp file on local host
client.execute() is generating exception