Develop Reference

How can I share database android application and a .net web application?

I want to share database between an android application and a web application build using Asp.net (my database is based on an IIS server.)
I just want to find the possible ways available to do it, and if I could use php services with IIS server.
I would be so thankful if someone could help me.

Million ways. I can advise you this one: create REST or SOAP service which will have access to database with all methods you need. Now in android application and in ASP.NET application you can "ask" your service to create/update/delete/do something.

try with below code.Hope it will resolved your query.
/**
* This method is used for getting user response after sending request to server.
* It returns the response after executing url request.
* #param params
* #return
*/
public String getJSONObject(String params)
{
try
{
URL url = null;
String response = null;
String parameters = "param1=value1&param2=value2";
//url = new URL("http://www.somedomain.com/sendGetData.php");
url = new URL(params);
//create the connection
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setReadTimeout(40000);
connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
//set the request method to GET
connection.setRequestMethod("GET");
//get the output stream from the connection you created
OutputStreamWriter request = new OutputStreamWriter(connection.getOutputStream());
//write your data to the ouputstream
request.write(parameters);
request.flush();
request.close();
String line = "";
//create your inputsream
InputStreamReader isr = new InputStreamReader(
connection.getInputStream());
//read in the data from input stream, this can be done a variety of ways
BufferedReader reader = new BufferedReader(isr);
StringBuilder sb = new StringBuilder();
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
//get the string version of the response data
response = sb.toString();
//do what you want with the data now
//always remember to close your input and output streams
isr.close();
reader.close();
}
catch (Exception e)
{
Log.e("HTTP GET:", e.toString());
response="";
}
return response;
}

Unknown error while calling Web API from Android

i am trying to send a JSONObject as input parameter for a C# Web API with the following code
protected String doInBackground(JSONObject... companyInfo) {
try {
URL url;
URLConnection urlConn;
url = new URL(HOST_NAME + WEB_API_METHOD);
urlConn = url.openConnection();
urlConn.setDoInput(true);
urlConn.setDoOutput(true);
urlConn.setUseCaches(false);
urlConn.setRequestProperty("Content-Type", "application/json");
urlConn.setRequestProperty("Host", HOST_NAME);
urlConn.connect();
PrintWriter out = new PrintWriter(urlConn.getOutputStream());
out.print(companyInfo[0]);
out.close();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
StringBuilder stringBuilder = new StringBuilder();
String line;
while ((line = bufferedReader.readLine()) != null) {
stringBuilder.append(line).append("\n");
}
bufferedReader.close();
Log.i("companyInfo > ", stringBuilder.toString());
}
catch (Exception ex)
{
Log.e("Exception", ex.getLocalizedMessage());
}
return null;
}
When this is called, the method doesn't execute and when i try to catch the error, i don't get a meaningful message. it shows the URL name and thats it.
I am unable to find the issue and any help would be appreciated.
this is the error i got
java.io.FileNotFoundException: http://MY_FULL_URL
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:238)
at com.fourtyninetons.NewCompanyActivity$saveCompanyProfile.doInBackground(NewCompanyActivity.java:103)
at com.fourtyninetons.NewCompanyActivity$saveCompanyProfile.doInBackground(NewCompanyActivity.java:70)
at android.os.AsyncTask$2.call(AsyncTask.java:295)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
Lakshman.

As mentioned in the solution of this question, the problem is with the web api method and the backend database. Fiddler helped me solve the issue and the above code is working fine.
Useful Tip: When anyone gets this FileNotFoundExceptionuser POSTMAN or FIDDLER to execute the method and find for the errors.
Thank you everyone who attempted to solve this.

Android HttpClient response

I'm trying to send json data to a php script from my Android application with HttpClient, and get the response.
Android Code
private void sendPurchase(String SKU) throws IOException{
Log.e("sendPurchase","Inside sendPurchase");
final SharedPreferences prefs = getGCMPreferences(getApplicationContext());
int pur_user = prefs.getInt("C_user", Integer.MIN_VALUE);
InputStream inputStream = null;
String result = "";
HttpClient httpclient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost("http://www.*.com/includes/purchase.php");
JSONObject json = new JSONObject();
try {
json.put("PUR_sku", SKU);
json.put("PUR_user", pur_user);
} catch (JSONException e) { Log.e("SendPurchase","Problem with Json Object"); }
Log.i("JSONObject", json.toString());
StringEntity se = new StringEntity(json.toString(), HTTP.UTF_8);
httpPost.setEntity(se);
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-type", "application/json");
HttpResponse httpResponse = httpclient.execute(httpPost);
inputStream = httpResponse.getEntity().getContent();
if(inputStream != null){ result = convertInputStreamToString(inputStream); }
else{result = "Did not work!"; }
Log.e("RESULT",result);
}
private static String convertInputStreamToString(InputStream inputStream) throws IOException{
BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
String line = "";
String result = "";
while((line = bufferedReader.readLine()) != null)
result += line;
inputStream.close();
return result;
}
And the PHP script
<?
$auth=0;
require('./connexion.php');
$data = file_get_contents('php://input');
//$data = '{"PUR_sku":"singleone","PUR_user":"3"}';
$json = json_decode($data,true);
/* Some database stuff ... */
echo "Retour ".print_r($json)." et ".$json['PUR_sku']." et ".$json['PUR_user'];
?>
When i launch the app and execute sendPurchase function, it seems to be ok until the execution of the HttpPost. In the logcat i get all the logs with correct params, except the last log "RESULT" that does not appear.
That's why i guess something is going wrong with the HttpPost execution, but actually i don't know if the problem comes from the application side or the php script side...
When i execute the php script alone in a web browser, replacing first $data line by the second one, everything is ok. But when it comes from the application it's not ok...
The Json Object sent (i hope) to the script seems ok too : {"PUR_user":3,"PUR_sku":"singleone"}
(the sendPurchase function is executed in Background).
Any idea about what i'm doing wrong ? Thanks !
/EDIT/
Here is the logcat for #RyuZz solution.
My code is about purchasing an item, consume it and send new value to my database on a web server. The purchase & consume are ok, but i can't send the values to the web server.
And again, when i execute the php script alone in a web browser, replacing first $data line by the second one, everything is ok.
Note that i have another similar code to register user to GCM, using HttpClient, and that code works fine.
06-25 14:07:12.968: D/IabHelper(21833): Successfully consumed sku: singleconf
06-25 14:07:12.968: D/IabHelper(21833): Ending async operation: consume
06-25 14:07:12.979: D/CONSUME(21833): Consumption finished. Purchase: PurchaseInfo(type:inapp):{"orderId":"12999763169054705758.1353445524837889","packageName":"com.*.*","productId":"singleconf","purchaseTime":1435234296875,"purchaseState":0,"purchaseToken":"bohbcbiigcbidfficbikebnk.AO-J1OzuQ_SsNTG1h9MtUvbaPc3PeN9nBHG-qBOE82ao1rTDFNrgA7tYQcMdECxCVFrrZEn_QifQ28OcIupyesZI-5cjDILFODYpBEaeqMfE0wCAeMFkJLfNUK_TsKPMj7F2sBDdgOYx"}, result: IabResult: Successful consume of sku singleconf (response: 0:OK)
06-25 14:07:12.979: D/CONSUME(21833): You bought & consumed a single conf
06-25 14:07:12.979: D/CONSUME(21833): End consumption flow.
06-25 14:07:12.979: E/Purchase Background(21833): Inside doInBackground
06-25 14:07:12.979: E/sendPurchase(21833): Failed to send HTTP POST request due to: java.lang.NullPointerException

You can try the following instead of HttpClient which is anyway deprecated:
try{
int pur_user = prefs.getInt("C_user", Integer.MIN_VALUE);
URL url = new URL("http://www.*.com/includes/purchase.php");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestProperty("Content-Type", "application/json");
connection.setRequestProperty("Accept", "application/json");
connection.setRequestMethod("POST");
JSONObject jsonObject = new JSONObject();
jsonObject.put("PUR_sku", SKU);
jsonObject.put("PUR_user", pur_user);
//convert JSONObject to JSON to String
json = jsonObject.toString();
OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());
writer.write(json);
writer.close();
responseCode = connection.getResponseCode();
if(responseCode == 200) {
InputStream content = connection.getInputStream();
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(content, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line;
while ((line = reader.readLine()) != null)
{
sb.append(line).append("\n");
}
result = sb.toString();
//TODO get your stuff from result
content.close();
} catch (Exception ex) {
Log.e(TAG, "Failed to parse JSON due to: " + ex);
} finally {
connection.disconnect();
}
} else {
Log.e(TAG, "Server responded with status code: " + responseCode);
}
} catch(Exception ex) {
Log.e(TAG, "Failed to send HTTP POST request due to: " + ex);
}
if this isn't working, please post the logcat.
Don't forget to implement the required permissions in your manifest:
<uses-permission
android:name="android.permission.INTERNET" />

POST function for REST service returns empty response

I'm trying to do a post method for a REST service, but I'm not getting any response from server:
public JSONObject postValues (String strUrl, String strJsonArray) throws Exception{
JSONObject jsonObject = null;
URL url = new URL(strUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
strJsonArray = "data=" + strJsonArray;
Log.e("result",""+strJsonArray);
OutputStream os = conn.getOutputStream();
os.write(strJsonArray.getBytes());
os.flush();
conn.connect();
if (conn.getResponseCode() != 200) {
throw new RuntimeException("Failed : HTTP error code : "
+ conn.getResponseCode());
}
BufferedReader br = new BufferedReader(new InputStreamReader(
(conn.getInputStream())));
String output;
StringBuilder sb = new StringBuilder();
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
Log.e("output",output);
sb.append(output);
}
Log.e("output",sb.toString());
jsonObject = new JSONObject(sb.toString());
conn.disconnect();
return jsonObject;
}
When I see my logCat a get:
output {}
I know that the server is working right because I'm using the "advanced REST client" plugin of google chrome. If I call the URL manually (using the plugin of course)I get the desired answer:
{"message":"OK","code":200}
But if I try to use my function, my strJsonArray is inserted but I get an empty respond from server.
Is there anything wrong with my code?.

Everything looks good...
You could use Wireshark to capture the packets sent to and received from the server using an emulator and the chrome rest client. Then you can compare them and maybe find out what's wrong.
You could also check if theres something in the error stream (conn.getErrorStream()).

POST with Basic Auth fails on Android but works in C#

I have an app I am developing that requires me to post data to a 3rd party API. I have been struggling with authentication since the beginning and kept putting off further and further, and now I'm stuck.
I have tried using an Authenticator, but have read all about how there appears to be a bug in certain Android versions: Authentication Example
I have tried several different options, including the Apache Commons HTTP Library with no success. After all of this, I decided to make sure that the API wasn't the pain point. So I wrote a quick WinForms program to test the API, which worked perfectly on the first try. So, the idea that I'm working from and the API I working with both seem fine, but I am in desperate need of some guidance as to why the Java code isn't working.
Examples follow:
C# Code that works everytime:
System.Net.ServicePointManager.Expect100Continue = false;
// Create a request using a URL that can receive a post.
WebRequest request = WebRequest.Create(addWorkoutUrl);
// Set the Method property of the request to POST.
request.Method = "POST";
// Create POST data and convert it to a byte array.
string postData = "distance=4000&hours=0&minutes=20&seconds=0&tenths=0&month=08&day=01&year=2011&typeOfWorkout=standard&weightClass=H&age=28";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
// Set the ContentType property of the WebRequest.
request.Headers["X-API-KEY"] = apiKey;
request.Headers["Authorization"] = "Basic " + Convert.ToBase64String(Encoding.Default.GetBytes("username:password"));
request.ContentType = "application/x-www-form-urlencoded";
// Set the ContentLength property of the WebRequest.
request.ContentLength = byteArray.Length;
// Get the request stream.
Stream dataStream = request.GetRequestStream();
// Write the data to the request stream.
dataStream.Write(byteArray, 0, byteArray.Length);
// Close the Stream object.
dataStream.Close();
// Get the response.
WebResponse response = request.GetResponse();
// Display the status.
MessageBox.Show(((HttpWebResponse)response).StatusDescription);
// Get the stream containing content returned by the server.
dataStream = response.GetResponseStream();
// Open the stream using a StreamReader for easy access.
StreamReader reader = new StreamReader(dataStream);
// Read the content.
string responseFromServer = reader.ReadToEnd();
// Display the content.
MessageBox.Show(responseFromServer);
// Clean up the streams.
reader.Close();
dataStream.Close();
response.Close();
Java code for Android that currently returns a 500:Internal Server Error, though I believe this is my fault.
URL url;
String data = "distance=4000&hours=0&minutes=20&seconds=0&tenths=0&month=08&day=01&year=2011&typeOfWorkout=standard&weightClass=H&age=28";
HttpURLConnection connection = null;
//Create connection
url = new URL(urlBasePath);
connection = (HttpURLConnection)url.openConnection();
connection.setConnectTimeout(10000);
connection.setUseCaches(false);
connection.setRequestProperty("User-Agent","Mozilla/5.0 ( compatible ) ");
connection.setRequestProperty("Accept","*/*");
connection.setRequestProperty("X-API-KEY", apiKey);
connection.setRequestProperty("Authorization", "Basic " +
Base64.encode((username + ":" + password).getBytes("UTF-8"), Base64.DEFAULT));
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestProperty("Content-Length", "" + Integer.toString(data.getBytes("UTF-8").length));
DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
wr.write(data.getBytes("UTF-8"));
wr.flush();
wr.close();
statusCode = connection.getResponseCode();
statusReason = connection.getResponseMessage();
//At this point, I have the 500 error...

I figured out the problem, and the solution finally after stumbling across the root cause as mentioned in the comment above.
I was using Base64.encode() in my example, but I needed to be using Base64.encodeToString().
The difference being that encode() returns a byte[] and encodeToString() returns the string I was expecting.
Hopefully this will help somebody else who is caught by this.

Here's a nicer method to do to the POST.
install-package HttpClient
Then:
public void DoPost()
{
var httpClient = new HttpClient();
var creds = string.Format("{0}:{1}", _username, _password);
var basicAuth = string.Format("Basic {0}", Convert.ToBase64String(Encoding.UTF8.GetBytes(creds)));
httpClient.DefaultRequestHeaders.Add("Authorization", basicAuth);
var post = httpClient.PostAsync(_url,
new FormUrlEncodedContent(new Dictionary<string, string>
{
{ "name", "Henrik" },
{ "age", "99" }
}));
post.Wait();
}

I have tried this in java
import java.io.*;
import java.net.*;
class download{
public static void main(String args[]){
try{
String details = "API-Key=e6d871be90a689&orderInfo={\"booking\":{\"restaurantinfo\":{\"id\":\"5722\"},\"referrer\":{\"id\": \"9448476530\" }, \"bookingdetails\":{\"instructions\":\"Make the stuff spicy\",\"bookingtime\": \"2011-11-09 12:12 pm\", \"num_guests\": \"5\"}, \"customerinfo\":{\"name\":\"Ramjee Ganti\", \"mobile\":\"9345245530\", \"email\": \"sajid#pappilon.in\", \"landline\":{ \"number\":\"0908998393\",\"ext\":\"456\"}}}}";
Authenticator.setDefault(new Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("admin", "1234".toCharArray());
}
});
HttpURLConnection conn = null;
//URL url = new URL("http://api-justeat.in/ma/orders/index");
URL url = new URL("http://api.geanly.in/ma/order_ma/index");
conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setDoInput (true);
conn.setRequestMethod("POST");
//conn.setRequestMethod(HttpConnection.POST);
DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
outStream.writeBytes(details);
outStream.flush();
outStream.close();
//Get Response
InputStream is = conn.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
String line;
StringBuffer response = new StringBuffer();
while((line = rd.readLine()) != null) {
System.out.println(line);
}
rd.close();
System.out.println(conn.getResponseCode() + "\n\n");
}catch(Exception e){
System.out.println(e);
}
}
}
this could help.