When I tried to run any sample application or a new one it shows this error. Can anyone help please?
The error is telling you that you have not selected a device:
"Please select a valid device before running the application"
You need to choice a physical phone (or Android emulator) to deploy the application to.
Ref: Debug on Device
you have to have the android virtual device downloaded.
here are a few options:
Xamarin Android player
Bluestacks
Andy
Genymotion
Now that you have the virtual device. you need to start one before you run or debug.
The specific error you are seeing is because you've not started the device properly before you debug, you should be able to see the device.
Now run the project, and you wont meet this error.
This is because of Hyper V. Things you need to do are:
1.Turn off your Hyper V.(http://www.poweronplatforms.com/enable-disable-hyper-v-windows-10-8/)
2.Update your android SDK to desired platform.
That set. Now run your app. It will work.
Please let me know if still you have same error.
I would advise you to use the Visual Studio Emulator for Android (get it here), it plays very nice with Xamarin and Visual Studio and sets up your system automatically. As an added benefit it is very fast!
Related
I'm trying to develop a cross-platform app using xamarin forms and mac-in-cloud. Specifically with ios, I'm trying to set-up automatic provisioning since I originally got the error when debugging: >Could not find any available provisioning profile for (app name).iOS on iOS
So, after researching into the issue I put my apple developer acct info in, and when trying to use automatic provisioning. I get an error under Team: >There were errors in the data supplied. Please correct and re-submit. There are no current IOS devices on this team matching the provided device IDs.
Now, following the research rabbit hole, I go to the apple developer portal, try and register device, select macOS, insert Hardware UUID of mac mini into device ID, so on. And no change to error(s).
Question time, am I setting it up completely wrong? Other (older) articles/forums suggest linking an ios device via itunes, however, that seems counterproductive to my objective. Anyways, any help would be greatly appreciated. Apologies for any naiveté.
What are you trying to develop with the mac? Is it a iOS (iPhone) app? If so you can just use the simulator on the mac, and the mac does not need to be registered.
Try manual provisioning in VS
Signing Identity > Development (your name)
Provisioning profile > probably will be vs (something)
Also in VS go to Preferences > Apple Developer Accounts > make sure your account is listed. Then on the right hand side, click 'View Details' then 'Download all profiles'
Restarting VS or the mac may also help.
Can someone please explain what's going on with my newly created Xamarin Xaml Portable project? When in "Debug" the application terminates immediately as soon as I lunch it -- like the gif above.
When in Release, it runs -- like the gif below
I like to understand what's going on between Debug and in Release why when in Debug, it terminates immediately but not in Release.
My phone model is Oppo A37F - Android 5.1
Another confusion is that, I have a Samsung Galaxy S DUOS 2, that is flashed with a custom fimrware - Android 6 (Marshmallow) - I am not facing the Debug/Release issue with this one.
Turning off/on my PC and Android devices does not help as well.
Thank you
and so I got it to work. Thanks #Smit for the direction
I have to set "Sdk Assemblies Only" in Debug.. The default setting is set to "None"
Clean your solution then uninstall the application on your device or emulator
and deploy your solution, that solved my problem.
I searched for the first error in stack, but I got that the error is resolved using the AVD manager, and they were using the Android studio, but in my case i'm using windroy so there is no AVD editor or manager.
How to resolve this problem please suggest.
Yes, in android studio there is an avd editor...
Your error is one of the following:
1.Not enough RAM assigned to the avd, should be 756megs or higher
You have an old video graphics driver and need to update
I'm trying to play with NativeScript to create any simple android app. I've done step 1 from NativeScript's 'Getting Started' (setting up my osx environment) and right now, i have a barebones NativeScript app created with tns create and android platform added to it.
When running tns run android everything goes well and the final message before device debug logs (i'm not an android/ios/mobile dev so i assume that it's just some kind of debug log of what's going on connected device) is:
BUILD SUCCESSFUL
Total time: 11 seconds
Project successfully built
Using /Volumes/HDD/Users/michal/Workspace/Sandbox/tns_hello_world/platforms/android/bin/tns_hello_worl d-debug.apk
Successfully deployed on device with identifier '00099fbd72369f'
However, there is nothing going on my device after that. No app is being launched, no error message. Just completely nothing.
My setup is:
OSX 10.9.5
Java 1.8.0_45
Samsung GT-I9100
Android 4.1.2
Have you any idea what am i possibly doing wrong? Thanks in advance.
Your android device is not supported by NativeScript. Use device with Android 4.2 (API level 17) or newer. You can also try it on emulator.
Jan 2019
I verified in Android 8.1, it works fine.
First look, it looks like not working.
However, after changing the text "Play with NativeScript!" to "Hello world" in home.component.html, I could see the text. The homepage message ideally should say this.
I am using Eclipse to program for the Android OS. I use a real device to test my application on.
To test my application I click on run, then the target project i wanna run and then the Android Device Chooser pops up, where I can choose the device or emulator that I want to run the application. (like probably every programmer here).
But sometimes when my app crashes because of some exception, the Android Device Handler gets some weired behavior. Now everytime I connect my device to the computer via USB a new device shows up in the Android Device Chooser, but all them (which are the same) are "unknown", so I cant use my device for testing anymore.
(source: yfrog.com)
The only way to solve this is by restarting my computer. Isnt there any other way to solve the problem? Am I missing something?
In your command line. (assuming ADB is on your path)
Try:
adb kill-server
adb start-server
adb devices
Unplug the device from the system.
Restart the eclipse IDE.
Goto the device development setting, uncheck and then check the USB debugging.
Issue will be resolved.