Develop Reference

Get data from phpmyadmin using another machine

I am building an android app with the following code:
try{
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost("http://10.0.2.2/tut.php");
HttpResponse response = httpClient.execute(httpPost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}catch(Exception e){
System.out.println("Exception 1 caugt");
}
This apps works fine in my computer.
I want everyone download this app can use it and read the data from phpmyadmin.
can any one teach my how to do this?
(I want the data in phpmyadmin can be read from public user.)
And do I need to change the code?
HttpPost httpPost = new HttpPost("http://XXXXXXXXX/tut.php");

To make your app available to everyone you have to host your data online. There are many ways you can achieve this and it depends a lot on what type of application you intend to distribute.
If you just want to start trying out how things work you can buy a normal web hosting which supports mysql and php. This will cost you between 30 to 60 euros for a year. You setup your database, upload your php api and your good to go.
If you want a more professional approach you can choose to host in the cloud via cloud services the like of Amazon Web Services and Microsoft's Azure. This has a big learning curve but it gives you total control over the server and also huge experience.

MVC4 - Android authentication via http POST and FormsAuthentication

I know there are plenty of resources like this on the web, and the closest I've come was the answer to this question: ASP.NET Web API Authentication.
Basically, this is my requirement. Log in via android to my account on an MVC4 internet application I created (which uses SimpleMembership). It is NOT an MVC Web Api app, which seems to confuse things when looking at the various ways of achieving this.
I am attempting to use FormsAuthentication to set an authentication cookie, but I have no idea how to configure my android httpclient to actually send through this authentication cookie, or how to get MVC to save a session from my android app.
So far, this is what I've come up with on the MVC side:
[HttpPost]
[AllowAnonymous]
public bool LoginMobi(LoginModel model)
{
var membership = (SimpleMembershipProvider)Membership.Provider;
if (membership.ValidateUser(model.UserName, model.Password))
{
FormsAuthentication.SetAuthCookie(model.UserName, false);
return true;
}
else return false;
}
And I use the following java in my android app (sent over an SSL connection):
DefaultHttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("https://mysite/api/login");
List<NameValuePair> nameValue = new ArrayList<NameValuePair>();
nameValue.add(new BasicNameValuePair("UserName", "foo"));
nameValue.add(new BasicNameValuePair("Password", "bar"));
httppost.setEntity(new UrlEncodedFormEntity(nameValue));
httppost.setHeader("Content-type", "application/json");
HttpResponse response = httpclient.execute(httppost);
// etc etc
What I haven't figured out is how to receive the authentication cookie on android and send it back with each request to controllers with the [Authorize] attribute. I'm rather new to this so please forgive my ignorance!

You are using FormsAuthentication which uses cookie to identify user for each request. You have two options here.
Use CookieStore for HttpClient. Check Android HttpClient and Cookies
OR
Combine BASIC auth and FormsAuthentication. Check Combining Forms Authentication and Basic Authentication
Hope this helps.

How to send image/pdffile from android to android with database

I want to try developing an android application that can send image/pdfFile from android to android device. For example i have a list of patients. when i click an item it will go to send file to patient that i have clicked. Then the sent file will be stored in database. and will serve as sent file history. Just like an instant messaging. I found an example of instant messaging but this only sending texts not images/files
here AndroidIM
Could anyone convert it to sending images?I really don't know how. Or just link me to some tutorial in sending images/files to another device. I am using also database for storing history of sent files.

send the image to you PHP backend using the Http MultiPart Request like the following :
try{
HttpClient client = new DefaultHttpClient();
HttpPost request = new HttpPost(url);
MultipartEntity entity = new MultipartEntity(
HttpMultipartMode.BROWSER_COMPATIBLE);
File file = new File(imagePath);
ContentBody encFile = new FileBody(file,"image/png");
entity.addPart("images", encFile);
request.setEntity(entity);
}catch(Exception e ){
}
and please give me some feedback .
Hope That Helps .

Android web service, REST or KSOAP2 or get/post

As of now, if I have to store something from Android to the server, I make an HTTP request of a GET URL, with data in the form of parameter values. On the server side, I use PHP to extract the parameter values and store them in database.
Similarly, if I want to get something from the server to Android, I post a JSON string on the webpage using PHP. Then I read it in Android using HTTP request, convert the string to JSON and then use the data.
This method of PHP-MySQL-Android-JSON is very easy but not secure. Suppose I want to store the score of player from my game in Android to the server's database, it is easy to execute some URL like www.example.com/save_score.php?player_id=123&score=999 from Android. But anyone can update his score if he comes to know the php file name and names of parameters, by simply typing this URL in a browser.
So what is the correct method of interacting with a server (my server supports PHP but not Java)?
I have heard about RESTful and KSOAP2, but know nothing about them. Can you please explain them a bit in lay man language (reading the proper definitions didn't help me)? What are these used for?
What is the best way to send score to the server? Any tutorial link would be great.
Thanks.
Edit 1:
I don't use proguard to obfuscate my code for several reasons. So anyone can reverse engineer the apk, look into the code, find the URL to update the score, write his own POST method and update his score. How can I stop this from happening?

Use POST method to post data from android and get it in php. e.g. use this method to send your data in json formate , which will not be showing in url.
public static String sendRequest(String value, String urlString) {
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(urlString);
httppost.setHeader( "Content-Type", "application/json");
//value = "";
StringEntity stringEntity = new StringEntity(value);
stringEntity.setContentEncoding("UTF-8");
stringEntity.setContentType("application/json");
httpclient.getParams().setParameter(CoreProtocolPNames.USER_AGENT, System.getProperty("http.agent"));
httppost.setEntity(stringEntity);
HttpResponse response = httpclient.execute(httppost);
String responseString = convertStreamToString(response.getEntity().getContent());
return responseString;
} catch (Exception e) {
Log.d("check", ""+e.getMessage());
return ERROR_SERVICE_NOT_RESPONDE;
}
}
And call this method like this.
sendRequest({"player_id":1,"score":123}, "www.example.com/save_score.php");
And get json body in php and parse it.

I think you should read more documents about RESTful, Http POST and GET before starting. Your example url is GET method. It should be used for getting public information or query data. If you want to change something in server side, you should use POST method, it is more security than GET.
My recommend is using RESTful because it is painless than SOAP, especially for Android. Here is an example HTTP POST on Android.

Android: HttpClient remote vs. local server

I'm having problems with an app that works when connecting to a remote web server, running a php script against a database. However, when I point the same app to my local web server running on my machine, things doesn't work.
Here's the code I use for connecting to the remote web server (it needs authentication):
(All the networking code is done inside an AsyncTask class.)
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
StringBuilder authentication = new
StringBuilder().append("frankh").append(":").append("vriceI29");
result = Base64.encodeBytes(authentication.toString().getBytes());
httppost.setHeader("Authorization", "Basic " + result);
nameValuePairs.add(new BasicNameValuePair("date", date));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
For the connection to the local server, which doesn't use authentication, I'm commenting out these lines:
//StringBuilder authentication = new
// StringBuilder().append("frankh").append(":").append("vriceI29");
//result = Base64.encodeBytes(authentication.toString().getBytes());
//httppost.setHeader("Authorization", "Basic " + result);
However, I get two different errors, depending on how I phrase the url to the local web server.
If I use this url: "http://localhost.shoppinglistapp/fetchlist.php"
I get this error:
Error in http connectionjava.net.UnknownHostException: localhost.shoppinglistapp
If I skip the http part in the url, I get this error:
Error in http connectionjava.lang.IllegalStateException: Target host must not be null,
or set in parameters.
What am I doing wrong here? The remote server is a Linux Apache server, and the local server is IIS 7. The local server is supposed to be just for working on when I've got no or a bad internet connection, so it's not critical, but I hate not knowing why things doesn't work.

If you testing via your local emulator, you'll want to use 10.0.2.2 instead of 'localhost'.
Referring to localhost from the emulated environment