First time post here, I am new to programming with android studio. I am not sure if I came to the right place to ask for help. I am not sure what I am trying to do is possible or where to search for tutorials on the subject. I don't have experience with connecting devices over WiFi at all.
Here is what I am trying to do:
I have an App I created with Android Studio, this app has a list of "devices", these devices will control a window over a wifi connection.
In the app, I simply have an "Open" button and a "Close" button for each "device".
I need to be able to show that the 'device' (which is the wifi stepper below) is connected to my app.
I am using the ESP-WROOM-02 (ESP8266) wifi module. Specifically, this wifi-stepper: https://www.crowdsupply.com/good-robotics/wi-fi-stepper
I can give more info or code samples of my project if needed, and any help is much appreciated. I don't know how or where to start.
tldr; I am unsure how to program the connection between the app and the module so that when I press open, the window will open.
Update, As now you say they are both on the same network and the device says "HTTP(S) JSON RESTful interface" you app just needs to make https requests to the ip address of the device.
Docs https://bitbucket.org/aklofas/wifistepper/src/master/documentation/src/interfaces/restful.md
And in Android one method of http requests https://developer.android.com/reference/java/net/HttpURLConnection.html
The device has fairly good documentation of how to set it all up and talk to it via it's various interfaces.
Related
I am developing a parental kind of App in which there is a requirement to block specific urls from all the browsers in the Device. I think this is an old question but couldn't find any solution yet on stack.
Do you have any working solutions. Assumption - The device is rooted.
Regards,
sha
I have two resources for you:
Since the device is rooted you can work directly with iptables. iptables will give you very precise control over all coming and going data packets. Check out open source projects like AFWall+ on GitHub for iptables in action.
If you want to be able to run your app on unrooted devices look into creating a fake VPN. You don't send any data to an actual VPN server, you simply use the VPN API to filter all the information coming and going. Check out Disconnect (whenever they actually share their open source code...) or OpenVPN which is what Disconnect builds on.
I want to develop an android application for LAN calling.My app resembles apps like whatsapp, viber etc, so I googled for the same. What I got from different answer is:
Whenever we install whatsapp, the whatsapp server register our number and contact list. The app continuously pings the server and update its status on server.
When we open the app, it gets the data from server, and if a number is found in contact list, it displays the status of the number and other things.
Whenever we message some one, the message goes to server and stays there until delivered successfully.
For my app the two steps are:
Find all the devices which has my app, their IP and mac address.
When devices are found,allow calling between them.
For step 1, I have two options:
As whatsapp, I can have a server. It registers the info of the mobile phone, whenever the app is installed. The app pings the server and shows its status.
I can use my own network device discovery code. This code scans the network and find the devices.
This step is costly, whole network is flooded with the packets. And also it is quite difficult to write network device discovery code.
For step two, I want to implement client-socket programming and simply connect the microphone of one device to the speaker of another phone. I think it is challenging, but it is possible.
Please help me with network discovery code or the server setup. I am quite familiar with android development, but very novice to networking.
Also how calling is done between these devices?
I have searched for the answer and found the following links: Peer-to-peer SIP call with Android SIP Stack?
how to implement voip in android
VOIP on Android libraries or sample code
I also put a question on quora:
https://www.quora.com/How-can-I-develop-an-app-having-feature-like-whatsapp-calling-in-android
But, still I am stuck at the beginning. Please help me with it.
Not a complete answer yet, but here are the things to look for:
Assuming Java is your language, use Multicast Network discovery in Java using multicasting and https://en.wikipedia.org/wiki/IP_multicast
Calling needs more description. Does the call starts immediately (as soon as the peers detect one-another) ? How does one know the identity information - a number or a username etc. ?
i am trying to connect two android devices using WIFI direct and i was successful. But the problem is the second device has to accept the a connection prompt after the other device initiates the connection. It is undesirable for what i am trying to achieve. I saw a few post here in stack overflow itself saying that currently its not possible. But came across an app called SUPERBEAM which user WIFI direct but without the prompt. A search in google gave me the following link from xda forum which says
SuperBeam creates an access point using Android's WiFi direct API's.
This essentially works like hotspot mode in old devices, but it is
guaranteed to work on newer devices like Nexus 7. Moreover, this mode
allows older devices to connect and receive files without having to
support WiFi direct's peer-to-peer connections and, more importantly, it
gets rid of the annoying "accept connection" prompt.
But no where i found information on how to implement this. Can anybody help me. Here is the link
http://forum.xda-developers.com/showthread.php?t=2177133
You could indeed simply use the createGroup function from the API to create a group, which also makes the access point. The first problem here is that the access point name & password are set automatically, and you can not change them.
So, you do need to pass the info to the connecting party, and for this, I would suggest using the local service advertising, and using the instance name there.
Did make simple test app for this and you can find it from Github under DrJukka/MyWifiMesh, also some discussions on the topic can be found from my blog
This can be achieve using Xposed framework. You need add the code and install the App. The phone needs to be rooted in order for it to work. I have tested it on multiple Samsung phones and it works.
Check this answer for details: How to auto-accept Wi-Fi Direct connection requests in Android
I'm doing project on android chat application with both friends and anonymous. we finished with the design phase. now we need to create a network between two emulators present in two system so that we can do chat in two different systems. But in emulator wifi is not getting turned on. I tried with the F8 button still the wifi is not getting on. I'll be grateful for any help in regard of this.if wifi cant be turned on how to simulate the chat application in emulators.we have written server and client side program in java, but don know how to connect server and client Thanks in advance
Use real device, because emulators don't support Wifi functionality afaik.
I have implemented an Android application which connects to its application server via a VPN tunnel. Thats fine.
However I want that the application turn on the Android VPN service itself ,rather than I am turning on the VPN on Android manually.
Is it possible to turn on this from java source code, like
// TO DO
if (something) {
VPN ON
}
Currently it's not possible to do that. Event with the latest classes in Android 4.0, User action is required to create a VPN connection. It's considered a security issue to be able progrmmatically to establish vpn connection (e.g. without the user to notice).
It is not possible to turn off the VPN from Java source code, unless the device is rooted, then there some hacks around. (so I have been told being an Android developer for a major software company) It is almost possible to do but it will take writing something in Native Code. There are some companies that are currently attempting to do this in an SDK. Authentec is one, but even in there SDK it is not possible to shut off the VPN connection yet. I came here looking to see if anyone has done this before but I know it is not possible through Java code, it will have to be in Native Code ( C for simpletons like myself)