First time asking a question here. Usually I can find my answer without having to ask, but this time I'm stuck and can't figure out what I'm missing.
I'm just trying to have my Android app fill out a form on a website and submit it. I don't need the app to do anything with any data being sent back, just fill out the form and submit it. Basically I'm trying to collect the results of a voting app. I thought form submission would be simple so I created a Google Spreadsheet and made a form out of it. I figured I'd point the Android app to the form and then I would have all the data in the spreadsheet for later viewing. I can't get the Android app to actually fill out the form though. Here's the resources.
Form
Spreadsheet
private void submitVote(String outcome) {
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost("https://spreadsheets.google.com/spreadsheet/formResponse?hl=en_US&formkey=dDlwZzh4bGFvNFBxUmRsR0d2VTVhYnc6MQ&ifq");
List<BasicNameValuePair> results = new ArrayList<BasicNameValuePair>();
results.add(new BasicNameValuePair("entry.0.single", cardOneURL));
results.add(new BasicNameValuePair("entry.1.single", outcome));
results.add(new BasicNameValuePair("entry.2.single", cardTwoURL));
try {
post.setEntity(new UrlEncodedFormEntity(results));
} catch (UnsupportedEncodingException e) {
// Auto-generated catch block
Log.e("YOUR_TAG", "An error has occurred", e);
}
try {
client.execute(post);
} catch (ClientProtocolException e) {
// Auto-generated catch block
Log.e("YOUR_TAG", "An error has occurred", e);
} catch (IOException e) {
// Auto-generated catch block
Log.e("YOUR_TAG", "An error has occurred", e);
}
}
I made both the form and the spreadsheet public so feel free to mess around with it and try and get it to work yourself.
I get no errors from my program, no compile errors, no errors in DDMS. When I actually run the program and click the button that executes this code I can see the delay since right now this is in the UI thread, so I know it's executing it. It appears as if everything is working perfectly, but my spreadsheet doesn't update at all.
Any thoughts? I'm sure it's something stupid that I'm missing, but any help would be appreciated.
Here's the updated code with lots of logging and debugging stuff.
private void submitVote(String outcome) {
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost("https://spreadsheets.google.com/spreadsheet/formResponse?hl=en_US&formkey=dDlwZzh4bGFvNFBxUmRsR0d2VTVhYnc6MQ&ifq");
List<BasicNameValuePair> results = new ArrayList<BasicNameValuePair>();
results.add(new BasicNameValuePair("entry.0.single", cardOneURL));
results.add(new BasicNameValuePair("entry.1.single", outcome));
results.add(new BasicNameValuePair("entry.2.single", cardTwoURL));
try {
post.setEntity(new UrlEncodedFormEntity(results));
} catch (UnsupportedEncodingException e) {
// Auto-generated catch block
Log.e("YOUR_TAG", "An error has occurred", e);
}
try {
HttpResponse httpResponse = client.execute(post);
Log.e("RESPONSE", "info: " + httpResponse);
BufferedReader rd = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getContent()));
String line;
while ((line = rd.readLine()) != null) {
Log.i("words", line);
}
Intent intent = new Intent(this, ReadingView.class);
intent.putExtra("html", line);
startActivity(intent);
} catch (ClientProtocolException e) {
// Auto-generated catch block
Log.e("YOUR_TAG", "client protocol exception", e);
} catch (IOException e) {
// Auto-generated catch block
Log.e("YOUR_TAG", "io exception", e);
}
}
I use ReadingView.class for something else in my app, but hijacked it for this logging purpose right now. It only has an onCreate() method, which is below.
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.readingview);
WebView mWebView = (WebView) findViewById(R.id.webview);
mWebView.getSettings().setJavaScriptEnabled(true);
//mWebView.loadUrl(getIntent().getExtras().getString("url"));
mWebView.loadData(getIntent().getExtras().getString("html"), "text/html", "utf-8");
}
Also worth noting that in the DDMS it only logs one output of line. I believe this is just because the html code is returned all as one line. Correct me if I'm wrong.
So I finally figured out what was going on. Through messing with manually encoding answers to the end of the form POST url I was able to find that the url it gave when viewing the source had encoding issues of it's own in it.
Here's the url from source:
<form action="https://spreadsheets.google.com/spreadsheet/formResponse?hl=en_US&formkey=dDlwZzh4bGFvNFBxUmRsR0d2VTVhYnc6MQ&ifq" method="POST" id="ss-form">
But here's what it needs to be to actually work in the above code:
https://spreadsheets.google.com/spreadsheet/formResponse?hl=en_US&formkey=dDlwZzh4bGFvNFBxUmRsR0d2VTVhYnc6MQ
The extra amp; was what was messing it up. For whatever reason it works without the last &ifq too, so I left that off. Anyway, here's completed code:
private void submitVote(String outcome) {
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost("https://spreadsheets.google.com/spreadsheet/formResponse?hl=en_US&formkey=dDlwZzh4bGFvNFBxUmRsR0d2VTVhYnc6MQ");
List<BasicNameValuePair> results = new ArrayList<BasicNameValuePair>();
results.add(new BasicNameValuePair("entry.0.single", cardOneURL));
results.add(new BasicNameValuePair("entry.1.single", outcome));
results.add(new BasicNameValuePair("entry.2.single", cardTwoURL));
try {
post.setEntity(new UrlEncodedFormEntity(results));
} catch (UnsupportedEncodingException e) {
// Auto-generated catch block
Log.e("YOUR_TAG", "An error has occurred", e);
}
try {
client.execute(post);
} catch (ClientProtocolException e) {
// Auto-generated catch block
Log.e("YOUR_TAG", "client protocol exception", e);
} catch (IOException e) {
// Auto-generated catch block
Log.e("YOUR_TAG", "io exception", e);
}
}
Hope this helps someone else when trying to work with Google Spreadsheet Forms. And thanks to #pandre for pointing me in the right direction.
The format, entry.0.single might not work in many cases. You must always find the proper id of the elements to create your POST request. This article provides the proper way to post data to a Google docs sheet via android app.
Have a look at the source for Acra. This uploads stack traces to a Google spreadsheet.
You probably are not seing errors because you are printing exceptions in the wrong way.
You are using e.printStackTrace(); which does not appear in DDMS/Logcat.
You should use instead
Log.e("YOUR_TAG, "An error has occurred", e);
which will log your error in DDMS/Logcat. You should see the stacktrace of the exception, and it will help you understand what's wrong.
EDIT:
Have you checked what is returned in client.execute(post); ?
You should check what is being returned in the POST response by doing:
HttpResponse httpResponse = client.execute(post);
You can also run the application in debug mode and check where it is crashing / stopping
So the cardOneUrl's are text edit fields in a layout.xml "results.add(new BasicNameValuePair("entry.0.single", cardOneURL));" Thanks, Joe
Related
I have an application and I need to get some data from my database(MySQL and it stays on web, not local). I think a simple RestFul webservice will be the best option for me to access this database and get the data. However, I m not able to create the webservice. I did some researches but I got confused. All I need is just accessing the database and get a few data from the table. Please give me some help to create the neccessary webservice. I don't want it to be a complex webservice. Thank to you all
this is php page of web-service. in this userid is taken from android java file that requesting that data. and after that selecting data from mySql it will simply echo all data and that will be given to java file as response.
seluser_profile.php
<?php
//$con=mysql_connect("localhost","root","");
//mysql_select_db("android_db",$con);
$con=mysql_connect("localhost","root","");
mysql_select_db("android_db",$con);
$uname=$_POST['userid'];
$q="select * from user_details where username='$uname'";
$rec=mysql_query($q);
if(mysql_num_rows($rec)==1)
{
$arr=mysql_fetch_array($rec);
echo $arr[0]+" "+$arr[2]+" "+$arr[3];
}
else
{
echo "false";
}
?>
Java code for requesting to web service.
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://10.0.0.2/webservice/seluser_profile.php");
try {
// Add your data
//Toast.makeText(getApplicationContext(), "Hello", Toast.LENGTH_LONG).show();
List<NameValuePair> namevpair = new ArrayList<NameValuePair>(2);
namevpair.add(new BasicNameValuePair("userid",valueIWantToSend));//in this first argument is name of post variable which we will use in php web service as name of post varible $_POST['fname'];
httppost.setEntity(new UrlEncodedFormEntity(namevpair));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
str = inputStreamToString(response.getEntity().getContent()).toString();
//Toast.makeText(getApplicationContext(), "your answer="+str, Toast.LENGTH_LONG).show();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
use this java code in doInBackground method of Asynctask class. otherwise it will give you network handler exception.
private StringBuilder inputStreamToString(InputStream is) {
String line = "";
StringBuilder total = new StringBuilder();
// Wrap a BufferedReader around the InputStream
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
// Read response until the end
try {
while ((line = rd.readLine()) != null) {
total.append(line);
}
} catch (IOException e) {
e.printStackTrace();
}
// Return full string
return total;
}
and also add this function for string building from inputstream.
Here is a link, You may seen this while surfing, I know this is not an answer , but I cannot comment bcz I dnt have enough Rep.
http://www.androidhive.info/2014/01/how-to-create-rest-api-for-android-app-using-php-slim-and-mysql-day-12-2/
I used this in one of my project, customization was very easy..and a great tutorial.
I have written a Android program to upload a file to server by HTTP POST.
Earlier its was working fine but I don't know why it is not working now.
I am testing this with my Android Device.
I Have just checked that It is working fine with emulator.
When I open that link in browser, Then it is still working fine and open correctly.
Do any body can tell me what could be the problem???
I am getting this error: (No Address associated with hostname)
10-07 04:28:14.410: I/System.out(1280): executing request POST http:////path/to/my/server//api/index.php/match HTTP/1.1
10-07 04:28:14.450: W/System.err(1280): java.net.UnknownHostException: Unable to resolve host "//path/to/my/server/": No address associated with hostname
Here is my code...
private class UploadFilesTask extends AsyncTask<File, Void, Void> {
#Override
protected Void doInBackground(File... arg0) {
HttpClient httpclient = new DefaultHttpClient();
httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
enter code here
// I have not shown my REAL server address due so some restriction, So assume below URL is correct
HttpPost httppost = new HttpPost("http://path/to/my/server/"); //Assume path is correct
//File file = new File("/mnt/sdcard/DCIM/Camera/01.jpg");
MultipartEntity mpEntity = new MultipartEntity();
ContentBody cbFile = new FileBody(arg0[0], "image/jpeg");
mpEntity.addPart("userfile", cbFile);
httppost.setEntity(mpEntity);
System.out.println("executing request " + httppost.getRequestLine());
HttpResponse response = null;
try {
response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
HttpEntity resEntity = response.getEntity();
System.out.println(response.getStatusLine());
if (resEntity != null) {
try {
//audioFilename = EntityUtils.toString(resEntity);
System.out.println(EntityUtils.toString(resEntity));
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (resEntity != null) {
try {
resEntity.consumeContent();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
httpclient.getConnectionManager().shutdown();
return null;
}
}
Try the following
Delete your AVD
Shut down Eclipse
Created the AVD via the command line (e.g. android create avd -n my_android1.5 -t 2)
Launched it from the command line with the option -dns-server 8.8.8.8 (e.g. emulator -avd my_android1.5 -dns-server 8.8.8.8)
p.s. Make sure you didn't delete the internet permission in your manifest file by accident. Also, while you are it, check and make sure the address work on your android browser.
Try flush DNS. (in windows: ipconfig /flushdns)
Or change DNS provider.
Maybe there is a 2 '/' simbols in url ? "...server//api..." this must be like this "...server/api..."
I have a problem with request POST/GET in Android.
I am trying to handle the error:
Caused by: java.net.SocketTimeoutException: Read timed out
To prevent the crash on my application, I added a timeout of 40 seconds. That works but sometimes 40 seconds is not enough to avoid the error.
I tried to add the "try and catch" but it seems that the error isn't occurring inside here:
try {
request.setEntity(new UrlEncodedFormEntity(nameValuePairs));
localContext.setAttribute(ClientContext.COOKIE_STORE,
Backend2.cookieStore);
response = HttpManager.execute(request, localContext);
if (response.getEntity() != null) {
final String r = EntityUtils.toString(response.getEntity());
return r;
} else {
return null;
}
} catch (SocketTimeoutException e) {
e.printStackTrace();
return null;
} catch (UnknownHostException e) {
e.printStackTrace();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
I am looking for a solution but when I read on stackoverflow and on google, I see only posts like "increase your timeout, add a try, etc.."
I am doing something wrong?
It's hard to tell just looking at your catch statement, but maybe you are getting a different error than a SocketTimeoutException? Try to catch an Exception instead to confirm that.
I have tried so many options, I'm going to go crazy. I continue to get an SSL exception every time I try to post to a URL.
This works like a dream in C# using an HttpWebRequest.
The errors I get are:
Not trusted server certificate
java.security.cert.CertPathValidatorException: TrustAnchor for CertPath not found.
I am trying the following approach now, but I have tried custom SocketFactories, everything. Please help!
final String httpsURL = "https://...";
final DefaultHttpClient client = new DefaultHttpClient();
final HttpPost httppost = new HttpPost(httpsURL);
//authentication block:
final List<BasicNameValuePair> nvps = new ArrayList<BasicNameValuePair>();
nvps.add(new BasicNameValuePair("mail", username));
nvps.add(new BasicNameValuePair("password", password));
UrlEncodedFormEntity p_entity = null;
try {
p_entity = new UrlEncodedFormEntity(nvps, HTTP.UTF_8);
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
httppost.setEntity(p_entity);
//sending the request and retrieving the response:
HttpResponse response = null;
try {
response = client.execute(httppost, _context);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
HttpEntity responseEntity = response.getEntity();
//handling the response: responseEntity.getContent() is your InputStream
try {
final InputSource inputSource = new InputSource(responseEntity.getContent());
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
You need to consider how Android determines the validity of certificates. When it needs to verify a certificate, it will look at the chain of signatures. If it can find a trusted authority at its top, and the certificate not being on the revocation list, then it will be trusted.
To reduce time-intensive queries, Android comes bundled with a list of common CAs that it trusts. As you noted in the comments, the error disappeared when you upgraded. This is most likely due to the CA you were using being added to the list of shipped trusted CAs.
You can, if you trust the certificate, add it to this list of trusted CAs. The accepted answer to this question has some details on this procedure for older versions! Newer versions are more likely to come shipped with the certificates you will need. With newer versions, you can install certificates directly from your SD card. Go to Settings -> Security. Under Credential storage you will find the option Install from device storage. As long as you are using a standard format, you should be able to install your certificate!
My source: Security with HTTPS and SSL | Android Developers
I m implementing android app in that I m working on web api. Sometimes my app gets connected to webserver but sometimes it throws exception as java.net.UnknownHostException: Host is unresolved: webservername.com:80. I m fetching json response from api.
I m using fetching code as following:
String queryResult = null;
HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet();
try {
request.setURI(new URI(archiveQuery));
} catch (URISyntaxException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//HttpResponse response = client.execute(request, new BasicResponseHandler());
try {
queryResult = client.execute(request, new BasicResponseHandler());
}
catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
I think it's a DNS issue of your server, according to your comments. Sometimes you ping, sometimes you don't, but on your browser it always work? Surely it's a server connectivity issue.
The Answer is really very simple. You need to Restart the emulator.Check out this
Just restart adb, find adb.exe in your adt bundle and double click it. Some shit will happen on command prompt, and there you go, restart your emulator and it should work fine,