I'm making an app where I want to store data the users input on a google spreadsheet. I have tried Secure HTTP Post in Android already and the first answer does not work when I put it in android studio. Does anyone know another way to send data from an app to the spreadsheet?
use retrofit http://square.github.io/retrofit/
Setup a post method like this
#POST("users/data")
Call<Data> storeData(#Body Data data);
Then make the post call by calling the method with correct data.
All http methods are implemented in similar fashion.
Refer docs for detailed information about how to use retrofit.
Related
I have made school management software...for the server side I have designed the admin panel using servlet and jsp technology.and have used mysql database and for the client I have created an Android app. I want to perform login and logout authentication and fetch data of that particular user on his app.. but I m unable to integrate. I need to know what are ways through which this thing is done professionally....
Thanks in advance
At your backend side you have your servlet which handles incoming requests GET or POST. So in android app you just need to make call to your servlet and handle the response.
In android
1. Get the user credentials and pass it along with your request.Either make GET request and append your credentials to servlet url or pass the parameters as POST request.2. To make network calls use libraries such as Volley, Retrofit or you can even use android built-in AsyncTask.(If you are a beginner start with AsyncTask first and then upgrade to libraries mentioned).
Professional way is to develop REST apis at your backend and call them from your android app.
I'm new to Firebase and Android programming, I have some questions regarding Firebase custom authentication.
I build an android application of social report (for broken public infrastructure) which needed simplest solution for automatic authentication. Since it is a social report app in which users shouldn't be bothered in registration process by inputing any kind of data. So I decided to use Android uuid as an identifier of user instead of email/user name/etc. I loosely implement user authentication and registration. It only need Android device uuid to register/authenticate (don't even need a password). Although, I think I've secured user data in firebase security rules well enough.
I've successfully created a custom automatic authentication/registration server with Go language which mints and store the data from the Firebase itself. These are my current workflow:
The Android client automatically sends a request to my auth server. The request data contains Android uuid and several other data. I'm going to put it in onCreate activity. So every time user opens the application up, it will request for a token.
My auth server checks whether that particular uuid is stored in my Firebase. If it is, then generate a JWT. If not, my server will automatically create a new user data entry in my Firebase and send back a new JWT.
Someway save the JWT within the client app, and use that to do data transaction with firebase.
I managed to learn the Firebase library for Android, it is great and very simple. I found a lot of Android http request libraries (two of them are retrofit and volley). Yet, I still uncertain of the best way to send the auth request from the Android client.
What is the preferred/simplest way to send custom auth request in the client app, based on the requirements and workflow I've specified above? Do I need to use http request library to simplify the code? sample/snippet of code would be very helpful. What is the best way to store and use the JWT in the client app? Is my current workflow good enough? Evaluations are much appreciated.
As a side note, this is my school final project, not a production application. So I don't mind elaborate cases like whether user is having more than one phone, or buying second phone which ought to have same uuid with the previous owner, etc. Also, please spare my weird grammar/non-idiomatic language as I'm not a native english speaker.
The easiest way with Android is to use signInWithCustomToken() on a Firebase auth object (FirebaseAuth).
Here is the reference in the docs, including sample implementation code:
https://firebase.google.com/docs/auth/android/custom-auth
Good luck with the project.
Hi I want to send data from my android app to server and store in the Mysql database. But I want to use REST method to send the data and I want to create a Java app on the server side that will show the data in table format .
I have created the android app but don't know how to upload data using REST. The data which I want to send is latitude and longitude of current location.
And after refreshing the java page new data will be viewed on the page.
Please tell me how to do this task.
Thanks in advance.
You can use some framework to communicate with a server. I think retrofit is the best choice for REST API: http://square.github.io/retrofit/
But you can try the Volley. Or the HttpUrlConnection and DefaultHttpClient in android sdk.
This is a big question that would need more space than here to cover. To get started you could try looking at the spring boot or drop wizard frameworks for creating your REST service.
Coursera also has a course programming web services that might help you get started.
Alternatively, there are services like Parse that look after the backend process for you.
Sorry if this is a little general. Hopfully I can get pointed in the correct direction.
I have an android app that includes instant messaging. I want to add the functionality to send photos in messages as well. My backend is built on GAE and cloud endpoints and is written in Java.
So far, I've looked into google cloud storage, the blobstore, java servlet pages, etc. But a clear solution (or example using endpoints) has been impossible to find.
So, as the question states, how can I send and serve images from the blobstore using android and GAE endpoint backend?
Edit: This question is only regarding the back end. In android, I can do the http post easily enough. I'm just lost when it comes to doing this in endpoints
I suggest the following approach to implement what you require:
Pass the image data as base64 encoded text from your client.
On the server side, you can extract out the image content and then use one of many options that are available, which include Blobstore, Google Cloud Storage, etc. I suggest that you go with Google Cloud Storage because that is the recommended approach. If you prefer the Datastore, keep in mind that the data is limited to 1 MB in size, so you might hit that limit depending on the size of images that you are dealing with.
A SO question and answer here contains lot of relevant code that you could utilize: Sending images as a base64 string to a google cloud endpoint from cms
Why not using a simple HTTP POST to handler for image upload?
When I use the blobstore I typically have a pair of handlers one for uploading and one for serving images.
So, in your case I'll rather do a post to a URL sending the image file and some parameter than can link it to the proper place in the datastore (i.e. user ID).
Then, using endpoints I'll have the same linking key and display the image using the serving handler with the given parameter.
If you are already using endpoints you can follow #Romin 's suggestion and send the images as Base64 or upload your images in 2 steps using the blobstore/GCS service, first get the Upload URL (via endpoints) and then post your image to that URL.
I'm writing an app that incudes "news stream". One type of the entry is facebook post. I'd like to put those posts just like Twitter API allows to - without Login.
I do not want to implement Facebook Login feature from theirs API. It is redundant in my case.
What I am wondering is the security of this kind of bypass. Is it safe to get plain text (as JSON) from a link:
https://graph.facebook.com/{post-id}?access_token={token}
Token is my personal token that I generated at https://developers.facebook.com/tools/explorer/
Is it safe to use this token using it encoded in my apps code (Android)?
Using URLConnection, OutputStreamWriter, URLEncoder, BufferedReader.
Or schoud I make a .php on my server as the "middleman". (Pointless I guess).
Are there any other ways to get public posts from Facebook?
Because it is https, and because you are storing the token encrypted, it can be considered safe. However, you are missing a larger point: when you submit your app's APK to request permissions from Facebook, they expect you to use the Facebook SDK for Android when making use of the Graph API. This is mentioned in their conditions for approving permissions.
If you directly use the URLs' to get data, you will not receive permissions. By running your APK and observing the logcat data, Facebook is able to determine whether or not you are using the SDK.
So to answer your second question, Are there any other ways to get public posts from Facebook, the answer is YES, there is the Facebook SDK for Android, and you must make use of that in your app.