I am working on a project that gives notifications to a web application when some phone sensors change their values rapidly. I am new to android and even though I know how to get the sensors values in my phone, I'm not sure how to transmit them to my pc server. I will look into sockets for network/bluetooth transmitting, but is there any way to send it via the internet ?
Basically, I want my application to work like this: I connect to my android application on phone, I shake the phone a bit and then on my web application on pc I get some notifications. I was looking around and I saw working with a python server?
How should I proceed here? Which method should I use?
Use HTTP/HTTPS on the Android Client to send to your server. As that will be the easiest to program and most reliably way to get data off the phone regardless of network type. See HttpURLConnection for details. Just do a POST with your data to the web address.
If you don't want to just construct a simple PHP, ASPX, or other web service on top of a readily available HTTP server, then you can use a variety of HTTP server modules for Python. SimpleHTTPServer for example.
Related
am new to this application developer, first I'll describe the setup of my system. I've one mechanical machine, it connected with a PC via PLC, now I've some data ( decimal numbers) in PC (which is from machine), now
I need to develop an application to display contents (decimal numbers) in the android mobile, which is in PC via WiFi.
And i need to send some command back to PC,
Is it possible with simple application developer with simple coding?
Please help.
You can easily use TCP sockets which are based on IP protocol and will allow you to communicate over any IP network.
For your Server/PC
you can write a simple java tcp server on your PC.
Tutorials:
TCP Server
All About Sockets ... great starting point.
For your Android/Client
you will have to understand the basics on android development and take a look at couple of networking example.
follow these links:
Your First Android App
Android TCP Client Example
Extra :
TCP on Wikipedia no need to read the implimentation details just understand the concept.
If you want to do it only with your PC<->Mobile, you could expose the data-file via a webserver and then let the mobile read that file and expose in a desired manner. This is not a suggested way to do it, as it has several draw backs e.g. limiting exposed data etc.
Assuming that the data you want to expose is not trivial and may contain multiple data sources, Doing it in more-interoperable way will be a bit more work.
Write webservices (REST/SOAP) that expose the data from the server
Write an mobile app that consume the data from the webservice (via a REST client)
Once the app has consumed the data, you can write your
desired ui to display it on the mobile app.
I'm trying to develop a proyect like PTTDroid, I mean a Push-To-Talk or Walkie-Talkie application.
The issue is that in this app you can´t use 3G to access the web, so I've decided to use a Node.js server and implement an Android client to comunicate with it. I tried to do a multiplattform proyect using Phonegap the problem is that for audio record you can't access to buffer, you can only start and stop or pause the recording process but not send data while capturing. So my problem is that is possible to streams audio capture in real time by native Android functions (Audiorecord class) with a Node.js server by Socket.IO or similar?
I discovered this project, Asimi JS, but I don't know if someone else knows a better way to do what I want.
Thank you very much for your help!
It is certainly possible to do it, but a standard NodeJS http server would not be advisable as it uses tcp. You want to use UDP as a transport layer for audio, since it will be faster and the small packet loss that can occur will most likely not be a problem.
To be completely honest with you it sounds like you need to write a few demo applications on the native platforms - so do not use phonegap. You need native platforms in order to access things suchs as the mircrophone and to stream over UDP.
When you have a demo working, you can go on and try with another platform afterwards, but start with a simple setup instead of trying to do it all at once - if it was that easy, someone else would have done it before you.
Let me recommend a simple UDP server in whatever language you are most comfortable with such as (NodeJS, Java, C, C++, C#). Let the UDP server receive and save the content into a file that you can then play back on a desktop computer to verify the result. As a simple client, build one either on Android or iOS, and stream a file that you have already recorded and included in the app. When you have this setup working, you can try to capture the microphone, then do a user interface, then support multiple phones, then build a server which records the conversations, then build a user database, and so on a so forth. But start with a prototype of your main feature.
I've finally discovered and solved my problem (at least that's what I think)...First of all I created a server to send and receive UDP packets by DatagramSocket and after that, to achieve communication between server and client, when I was connected by 3G, I needed to have a static port and IP, that's why my server couldn't connect with the client. With data connection, the user IP and port is not always the same and you have to keep the same socket always opened if you want to send and receive. On the other hand the server has to store the adress and port from the client in the moment of connection.
Thank you very much for your help ExxKA
I'm having the following scenario:
On the PC i will have a program running: java or .net, haven't decided yet.
When a certain event happens on PC i want to notify the android device.
I want a solution as independent and reliable as possible.
Opening a server on the PC/Android i think is out of the question because the user might be behind a router or on GSM internet (as far as i know it can't open ports as server)
The solution i have at this moment is to have a web server on the internet and have it handle the job, but i'd like not to use this because the delay between checks should be around 5 seconds, and i expect to have about 2-3k users simultaneously, and that will probably know down a regular web server.
So, any ideas how this communication can be made?
You may consider the option of Bluetooth client server application since PC and Android device usually have Bluetooth. You will have a Java server running on the PC and an Android client on the device. Check out this post: Send text through Bluetooth from Java Server to Android Client
You can handle the situation where Bluetooth is not available by creating a failover mechanism using REST API & JSON.
If you're already a web developer, I think creating a light HTTP based REST or JSON service would be a great solution. You've already said you don't want to do that which leaves the option of rolling your own client/server set up.
On the Android side of things, one way to do it would be to use TCP sockets. You can learn more about them here: http://developer.android.com/reference/java/net/Socket.html
what is the best framework that I should use to make a remote control app for Android. What I want to do is something like Tony Fadel's app for Android and Iphone where you control your house thermostat temperature remotely with a smartphone app.
I was going to use sockets programming, but not sure if that is the best way. If it is then i will use it, but wanted some feedback before i get started.
If I make one android device the server and the other device the client I will still have to manually set the IP address every time I want to connect the client to the server.
I am trying to avoid having to make a web-app and having to make a php website to act as a server for this. Having to keep a server running is too much overhead. would rather make something like two android phones or tablets that can send message to each other over the internet or wifi router without too much setup and effort.
Would appreciate any ideas on this. I can't figure out how the nest thermostat works (http://www.nest.com/) but that is kind of the functionality that I am looking to copy. I wonder if they have to use a centralized server for all of the remote controls. If there is a way to do this peer to peer that would be great. that way all i would need is two Android tablets.
The other examples I can think of is VOIP like skype and google talk. I am sure these don't use a centralized server for voice calls. My needs are much more simple. no voice or video, only sending text messages from one android device to another over the internet. Each android device will probably be using wifi exclusively.
I am writing a flashcard program and would like to see the question on my android phone and at the same time want the answer to pop up on my PC. So the phone needs to push the answer to the PC, which is listening. The entire thing would go through wifi.
My current plan is to build an http server on the PC as a separate java application and use HTTP requests from the phone to push the flashcard answer. Is this a good idea or is there an easier way to do this, without HTTP? I just need to send single strings.
You can use HTTP, just create a TCP Listener on Port 80 and filter header messages out, the android part would be easier, because there are several api functions for http requests.On the other side, a simple TCP Listener on any other Port would be better, because Skype is using for example port 80, and the performance would be a little bit better. The android part isnt much harder, you only have to set up a client on your port, and then send your message to your pc.So i would suggest to use a custom port and a TCP Server on your PC and a TCP listener on android.