Android :: How To Design REST Writing PHP To Handle HTTPs?
Mar 2, 2010
In short, I am writing an Android application that I want to have pull data from a remote database. I was looking into .NET web services, but this http://stackoverflow.com/questions/297586/how-to-call-web-service-with-android question pointed me away from that direction.
Is REST as simple as writing some short PHP to handle something like https://www.example.com/data.php?employee=michael and have it return relevant XML or JSON data? That to me seems like what has been described to me by various sites and videos. Also, is this the best way to do this kind of operation over the internet for mobile devices, desktop applications, etc?
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Jun 14, 2010
I have an activity which starts a (intent)service. Both access the same DB and potentially write to the same table. What design pattern would you recommand to avoid concurrency?
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Nov 23, 2010
I am going to develop an Android Application but before developing it i needs to have MockUp for the Android Application,so is there any way to design MockUp/GUI Design tool for the Android Application?
I know about DroidDraw tool , but i think it is not the exact way to prepare Mockup for the android application.
I have already referred this SO Question , but overthere i just found all the tools for the I-Phone only. So please feel free to share with me if you have/found any !
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Sep 30, 2010
can anybody give example of rest webservice in android
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Jun 15, 2009
I am doing a https post and I'm getting an exception of ssl exception Not trusted server certificate. If i do normal http it is working perfectly fine. Do I have to accept the server certificate somehow?
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Apr 8, 2010
I'm new to implementing HTTPS connections in Android. Essentially, I'm trying to connect to a server using the org.apache.http.client.HttpClient. I believe, at some point, I'll need to access the application's keystore in order to authorize my client with a private key. But, for the moment, I'm just trying to connect and see what happens; I keep getting an HTTP/1.1 400 Bad Request error.
I can't seem to make heads or tails of this despite many examples (none of them seem to work for me). My code looks like this (the BODY constant is XmlRPC):
CODE:.......................
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Feb 11, 2010
Has any one been able to connect to a soap server using ksoap2 android via https?
I keep getting the error that "Hostname <###>was not verified"
CODE:..........
Apparently looking back at other ksoap which isn't for android your ment to us a different call to connect via https, but i can't find a way to do it in the android version.
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Dec 7, 2009
I develop facebook application in android. i want to log in to facebook via HTTPClient , teh user give me username and password and then i connect to facebook.com/login. i want to make like this code http://stackoverflow.com/questions/1409220/facebook-getting-incorrect-signature-104-when-getting-session-key/1795229#1795229. but in android, i tried to do that but when i get the session, a XML contain invalid parameter returned
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Sep 8, 2010
I am looking for a screen capture utility that DOES NOT require a rooted phone.HOW IDIOTIC, suppose I want to screen capture as a user, to help a developer do documentation? This is absurd that there's no apps for the rest of us honest users.there's something if I connect it to my PC. C'mon, I don't have to connect my home PC to some other computer to take screen snapshots. I want an app that works on the phone itself, and does not require root access.
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Jul 22, 2010
In my app, I have different activities with listviews. The datas come from a server with a REST method, and it's only done once, when I start the application.
The pattern that I'd like to set is to precharge all the listviews with the JSONs that I already have in local, and in parallel, launch a thread that get the new JSONs files with my REST methods, and then update the listviews.
For now, when I start the app, I parse my JSONs files, and build all the lists of objects. I access them later in a static way, from my lists adapters.
So I would like to know the best way to launch this REST thread, and update the listview. Should I use AsyncTask ? A service ? and then, when I update my local JSONs, I have to re-parse them, updates the lists of object, and call in my adapters NotifyDataChanged ?
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Jan 8, 2010
I want to add admob add in my application, I want to make application for every screensize, I am having a problem with is, I want to arrange a layout such that, ad comes on the top the rest of which should be webview. I can do it for normal screen sizes by hardcoding the screen size to desired px but it is not working on bigger screensizes, I want to add this in layout.xml.
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Nov 11, 2010
I am trying to get an image from a https url but it doesn't seem to display and get the image correctly but works fine on my computer browser. I have tested out a http url pointing to a different image and it works fine. My code is below:
public Bitmap getContactPhoto(String url) {
Bitmap pic = null; try { pic = BitmapFactory
.decodeStream((InputStream) new URL(
"https://mail.google.com/mail/photos/static/AD34hIjbK2m-Lj333E4nBcCkBC3MYl2tTs0xizuSqUOP3-Jd6DOrpFg1M5HG8jXh0MuPbeFepInZZDu92Dx8ST4b59EbOKmfYTortuuO3P1_Ohyu7b7a3gc")
.getContent()); } catch (MalformedURLException e) {
// TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) {
// TODO Auto-generated catch block e.printStackTrace(); } return pic; }
Here is the code from the activity class that calls the method above:
private ImageView mContactPhoto; private ContactDetailsViewHelper mViewHelper;
mContactPhoto = (ImageView) findViewById(R.id.contact_photo);
mViewHelper = new ContactDetailsViewHelper(mContext);
mContactPhoto.setImageBitmap(mViewHelper.getContactPhoto(mDetail.getImageRef()));
ignore the mDetail.getImageRef, that passes the real url value but for this case I tried hard coding the url as you can see from the getContactPhoto method.
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Apr 12, 2010
How to collect URLs of all http/https requests made by the phone as well as well as the return status code and user agent from the headers. This information should be coming for all browser requests and other applications too.Please let me know this information can be retrieved on App level or we have to go to system level for this.
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Jan 11, 2010
I want to use HTTPS in my application. The Java URL class does not seem to do the job.
Does anyone have any pointers?
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Sep 7, 2010
I downloaded Android SDK when I run setup, it displays the following error message.
Failed to fetch URL https://dl-ssl.google.com/android/repository/repository.xml, reason: HTTPS SSL error. You might want to force download through HTTP in the settings.
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Jan 18, 2010
I'm creating an app for the Android platform which will connect with just one site using HTTPS. It is essential that it won't be able to connect to any other sites, even with valid SSL certificates. I want it to be resistant to every form redirection (for example to site pretending to be the one I need to connect with) or other "attacks". Unfortunately I cannot find any good tutorial about SSL in Android.Do you know any? I'd be grateful for some links or advices. Or maybe could you give me some code snippets? My app is prepared to use HttpURLConnection or HttpClient - it makes no difference which path will I choose.
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Aug 31, 2010
I have a WCF REST service built with C# and it returns an image as part of a CPU intensive operation. The client is running on Android (Java) By default, it will return a text JSON object that looks something like this:{"d",[9,0,77,12,11,...]}Those are they bytes of the image. Fine. However, all the solutions for decoding this JSON are intolerably slow. I've tried Gson, Jackson, and the built-in Android JSONObject class. I have no idea why they are so slow.As an alternative solution, I have my REST service return a GUID, and then that GUID can be used by the Android client to go to a regular URL that serves up the image as a regular binary stream, via an MVC controller. This works well, and it fast, and is pretty easy to handle on the Android side. However, it does feel like a bit of kludge and kind of a violation of the REST design principles.
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Jun 11, 2010
Retrieving data from the REST Server works well, but if I want to post an object it doesn't work:...
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Aug 10, 2010
Is there any Opensource REST / RESTful Client / Library for Android ? Please share me the links.
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Sep 24, 2010
I need to pull data from a REST web service in my android app. The web service requires authentication.
I need to first call a login method, which will return me an authToken and JSESSIONID as part of the response header. I need to pass these items back with every request. I'm currently using: org.apache.http.impl.client.DefaultHttpClient.DefaultHttpClient() to call the login method. I can see the authToken and JSESSIONID are being returned in the response header.
Are there any existing tools or classes that might provide some sort of management functionality that I can easily integrate with my android app?
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Nov 10, 2010
Wondering what the differences between REST and JSON APIs are, how you interface with them, and how to go about parsing the results. My goal is to build a small application for my android phone to tell me when the next train will get to the subway station by my house, using the developer API provided by the transit agency.
I'm learning C++ in university, but hope to go about this in Java. I'm sorry if this is more of a discussion question rather than a black and white answer question, but I can't find any information elsewhere.
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Jul 29, 2010
i want to call REST Web Service from application.
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Apr 29, 2010
I need to do is download some basic text-based and image files from a web server that has a self-signed SSL certificate. I have been trying to figure out how to use HttpClient to do this, but getting the SSL to work is a nightmare that seems to be way too much trouble for such a simple task. Is there a better way to perform these file downloads? Perhaps through a WebView or Browser feature? Reinventing the wheel of making a simple HTTPS GET request is a major pain, and is significantly holding up my development schedule.
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Mar 28, 2009
So I have the following code.
StringBuilder sb = new StringBuilder(4096);
while (true) { int i = in.read(); if (i == 0) break;
else if (i == -1) throw new EOFException();
sb.append((char)i); }
What I see (with thousands of times run) is that this code takes about 1ms for every 7-10 bytes read. So reading just 10k takes almost a second!
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Jun 2, 2010
I'm trying to load https requests with a Webkit object but It shows only a blank page, with http requests I don't have problems, It shows the page correctly. I have look the source code of the browser, in http://android.git.kernel.org/?p=platform/packages/apps/Browser.git;a... but I don't understand how the browser process the https requests. I think that the class BrowserActivity process the http and https requests but I don't see how to do it. Somebody could explain how the browser process the https request? It uses a Webview object to show the response of the https requests?
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Jul 13, 2010
I am trying to stream video over https from Android browser. If the video URL is http, everything works fine. But when I switch the url to https, no video can be played. I tried 2 methods to stream over http/ https through Android browser.
1. Use html5 Video tag on browser (Android 2.0+ device) and call video.play( ) from javascript. - With Https url. Browser launches media player and the player displays alert dialog saying "Can't play video". I captured the client TCP traffic and found no SSL handshake between client and server. It looks like the player pops up the alert on any https link. - With Http url. Browser launches media player and the player can stream the video successfully.
2. Use direct link of html <a> tag on browser and click the link - With Https url. Browser downloads the video file without launching the player. The browser seems not try to load any https link in media player. - With Http url. Browser launches media player and the player can stream the video successfully.
So the above tests make me think Android media player cannot play media from any https url.
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Jul 9, 2009
I have Android pet-project DroidIn which utilizes HttpClient 4 (built into Android) to do some form based authentication. I started noticing that people who are using WiFi are reporting connection problems. It also doesn't help that site I'm accessing has self-assigned certificate. Well - the question is (I'm quite vague on WiFi details) If WiFi at the hotspot doesn't support HTTPS would that be a good enough reason for connection to fail and is there anything that I can do beside proxying into another appserver using HTTP which then would call HTTPS site?
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Jun 8, 2010
I've watched many of the Google IO talks and one that I'm trying to reproduce is "Developing Android REST client applications"[1]. In this talk Virgil suggests you should not execute your RESTful queries inside a Thread/AsyncTask spawned from your Activity (which I had been doing), instead you should use a more complex architecture that uses a combination of a ContentProvider and a Service. From what I understood the reason for this design was so your data was more persistent between app restarts, and so your queries don't disappear if your Activity starts/stops (e.g on a screen rotation). I buy into both those reasons hence I'm trying to implement this. On the slides[2] page 45 We have an Activity calling a ContentProvider. Now the ContentProvider checks its local database, if the content is not there it sends an Intent to a service which fetches the content, inserts it into the ContentProvider, then the ContentProvider calls back to the Activity (with a ContentObserver) and the Activity can carry on. The question I have is how is this callback setup. The ContentProvider exposes simple methods, query, insert, update, delete which don't seem easy to adapt to a callback interface. It could be implemented by a Cursor which is designed to block, but that could be problematic as you don't' want to block your UI Thread. I'd appreciate if anyone could make this clearer to me, or show me some code. I'm hoping the Twitter app will be open sourced soon which apparently uses this architecture.
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Sep 1, 2010
I've read through the note of the topic "Developing Android REST Client Applications" from Google IO 2010, but I still have no idea on how to start. Can anyone show me a code example? Either the code for "Option A: Use a Service API" or "Option B: Use the ContentProvider API"
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Apr 14, 2010
I am a student in the process a building an Android app that can post a GPS track into a Rails application. I would like to do things the "Rails" way and take advantage of the REST. My rails application basically has 3 models at this point: users, tracks, and points. A user has_many tracks and a track has_many points. A track also has a total distance. Points have a latitude and longitude. I have successfully been able to create an empty track with:
curl -i -X POST -H 'Content-Type: application/xml' -d '<track><distance>100</distance></track>' http://localhost:3000/users/1/tracks
That is pretty cool. I am really impressed that rails do this. Just to see what would happen I tried the following:
curl -i -X POST -H 'Content-Type: application/xml -d '<track><distance>100</distance><points><point><lat>3</lat><lng>2</lng></point></points></track>' http://localhost:3000/users/1/tracks
Fail! The server spits back:
Processing TracksController#create (for 127.0.0.1 at 2010-04-14 00:03:25) [POST]
Parameters: {"track"=>{"points"=>{"point"=>{"lng"=>"2", "lat"=>"3"}}, "distance"=>"100"}, "user_id"=>"1"} User Load (0.6ms) SELECT * FROM "users" WHERE ("users"."id" = 1) ActiveRecord::AssociationTypeMismatch (Point(#-620976268) expected, got Array(#-607740138)): app/controllers/tracks_controller.rb:47:in 'create'
It seems my tracks_controller doesn't like or understand what it's getting from the params object in my tracks_controller.rb:
def create @track = @user.tracks.build(params[:track])
My xml might be wrong, but at least Rails seems to be expecting a Point from it. Is there anyway I can fix TracksController.create so that it will be able to parse xml of a track with nested multiple points? Or is there another way I should be doing this entirely?
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