Theproblem is when I try to install .apk files to the emulator using abd install from the command prompt, it tells me that it is offline, if I create another device and run that one, then try to install the .apk files, it says I have too many devices connected. So in other words, I can't install my .apk files.
How can I get rid of that emulator-5554? I heard that if you do a restart, it should clear all the devices, but that does not seem to be working. It is like it is getting initialized when my computer starts up. Has anyone run into this issue?
You probably have a process running that is listening on port 5555. To get rid of the "offline" device, you will need to find that application and close it or reconfigure it to listen to a different port.
Per @Brigham, "The way that Android detects emulators is byscanning ports starting at port 5555.". The port number is indicated after the emulator name (in this case 5656 and 5652). The port number to check is the emulator port number plus 1. So in this case:-
I finally solved this problem,I had to go to the Developer options from the Settings in the Emulator,then scrolled down a little, turned on the USB debugging. Instantly my device was recognized online, and I no longer faced that issue. I tried restarting android studio and emulator, killing adb process, but those did not work.
I also had the same issue. I've tried all solutions described here, but they didn't help me. Then I've removed all emulators in the Android Virtual Device Manager and created new ones. The problem was in the CPU/ABI system image configuration of the Android Virtual Device Manager. My Windows10 machine emulator with system image x86 is always offline, where the emulator with system image x86_64 is working fine as expected. Just be aware of this
I found that the emulation environment comes up as "offline" when the adb revision I am using was not recent. I properly updated my paths (and deleted the old adb version) and upon "adb kill-server", "adb devices", the emulation environment no longer came up as "offline".
I tried everything but only this one works for my case:Use SDK manager, and reinstall the system image.Android Studio, click Configure, SDK Manager, Launch Standalone SDK Manager,Check all "Google APIs Intel x86* System Image", "Intel x86 Atom*System Image" and install. Then re-start Android studio.
In MAC, you can use Activity Monitor utility, since, unlike Linux, we cannot use netstat -tulpn command in MAC. Search for the running instance of the emulator, typically qemu-system-i386. Kill that instance and you will see none of the ghost emulator running.
I had the same issue with my virtual device. The problem is due to the Oreo image of the virtual devices that have the Play Store integrated. To solve this problem I installed a new device without the Play Store integrated and all it was fine.
See emulator-5554 unauthorized for adb devices. On API 29 emulator I run adb devices command and got emulator-5554 unauthorized message. Then I created a new avd device from Google APIs image (in my case Q, x86), not from Google Play.
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Greetings dear friends. I'm trying to use the emulator, but it starts, the screens normally appear, then it's an eternal wait and there is no sign that the programmed application will appear. It's just a dark screen. How can I solve?
MeuWifi.aia (3.8 KB)
Greetings dear friends! I'm sending what was requested! I used it before I answered it, a tutorial, it took a long time to load the project. Then I restarted the connection and used the emulator it seems that now it worked normally. But if that can clarify anything else I appreciate it! One more question: Is the emulator waiting a minute? Apparently it takes me too long. Thanks for listening!
Such an application is meant to be: weather forecast demonstrator of the locations consulted. When I used it, there was only one answer: 404. Why? Won't a Wifi connection be required? As asks for such an application! After so much time trying to solve such a problem, it seems that now it's back to work. Thanks for everything!
Hold your Android Device up to the screen, the companion will capture the QR code and App Inventor will send your App to the Device for testing - you can even modify things and they will update on the device dynamically.
I already installed it on an android GT-S5301B. Only when I'm going to test it: a warning without a Wifi connection; I ignore such a warning; I do such a reading of the Qr presented, and it gives as error. What could be wrong? Is it because I don't have Wifi?
And about URl an example of how to proceed! It gets a little better to understand!
Thanks for listening!!
You get this error:
The operation lookup in pairs cannot accept the arguments: , [" nome"], ["no encontrou "cidade""], ["no encontrou "nome""]
Note: You will not see another error reported for 5 seconds.
The Do It facility is very useful. It makes it very easy to quickly trace data values through the execution flow of your blocks. If you drag my blocks into your Blocks Editor and click on the little blue comment (?) dots, they will pop up the Do It values left over from my testing.
I play with Arduino Micro. I write my programs in directly in machine code, in binary editors (yes, I know that there are more easy ways to program an Arduino, I do it for fun and learning). Often my programs work, but if not, then I would like to run them on an emulator to understand what's exactly going on under the hood. Is there any Arduino emulator that accepts hex files with compiled program and can execute it? I already looked at tools mentioned at Can I program for Arduino without having a real board? , but as far as I see, they are simulators rather than emulators and I can't use compiled binary programs in them.
At one point in processor development history, ICE machines were widely used. This is where a real processor is modified to allow access to internal controls and registers. (This actually sounds like the answer to your question.) However, as processors grew in speed and complexity, this approach grew out of favor.
So, while the question has merit, the common practice is likely not to run code on an emulator, but to run it on the processor using the JTAG interface and an IDE running on a host-computer / work-station.
A perfect solution for your demand to "play around with some terminal commands from official Ubuntu packages" would be to use the LXD demo server that lets you try out the LXD container hypervisor, which is available for installation in the Ubuntu repositories. With LXD you can use a system container running on top of the bare metal installation of the Ubuntu operating system.
As you can see, you are able to play around with commands on original Ubuntu without having to install anything. This can be done (for free) from where ever you are just by using a web browser. Open the LXD demo server in the web browser, accept the terms of the service and start using it.
If you like and want to use LXD containers on your system, just execute : sudo apt install lxd
Learn more about LXD in the documentation and in the comprehensive blog post series from the the technical lead and upstream project leader for LXC / LXD at Canonical Ltd. - Stphane Graber.
Weird that no one suggested it yet, but, instead of an emulator, why not play around with an actual Ubuntu machine? You can rent an Ubuntu virtual private server from several providers at a really cheap rate, and some of them will let you use their service for free for a limited time.
If your goal is to learn the Ubuntu insides, all those options should offer you enough time to study and practice. The best part about using a VPS to learn is that, if you manage to break it, you can always destroy it and start a new one from the scratch.
There should probably be more providers with similar services available, but I'd advise you to stick with the most popular ones, since their communities are more likely to answer your questions and provide support.
What you're asking for is effectively a mini server or a VPS. These are computers that are hosted by companies like DigitalOcean, Amazon Web Services, Google Cloud Platform, and so on. These companies may have free trials or promo codes, but you need to remember that these are effectively services being offered to you, and these are companies. Being nice isn't in the business model because it just isn't profitable.
However, that doesn't mean they're not free. DigitalOcean has a referral program that allows you to get free server time when other people sign up using your unique code. AWS has a one-year free trial for their servers. You can probably find similar deals for other server hosts if you actually try looking. Though, these services are usually pretty cheap ($5/month minimum).
Sure, you could probably find some "free" VPS providers out there, but this is a good time to point out that there's no such thing as a free lunch. You might not be paying in money, but your VPS might be very restricted in what it can do, may be used in data collection, only allow you access at certain times (timesharing), not allow you to save your work, and so on. If you want a reputable install of Ubuntu that actually works the way you want, you're gonna have to pay for one, sorry. Or, alternatively, you have a good friend who is going to let you use some of their excess server capacity.
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