Database Develop

[Q] Setting up a test environment

Can anyone advise this rookie user how to set up a test environment to use with an Android Studio project?
I recently installed Android Studio on my Windows 7 laptop and put together my first simple app. When I tried to debug it, I was offered two pre-configured test environments. The first was "Nexus 5 API 21x86" but when I tried to use that one it told me I needed HAXM. After much research I worked out what I needed to do to install HAXM but the installation file gave me the following error message:
VT_Not_Support = This computer does not support Intel Virtualization Technology (VT-x). HAXM cannot be installed."
I therefore turned my attention to the second option "TestDevice". When I tried to run that, Android Studio reported:
emulator: ERROR: This AVD's configuration is missing a kernel file!!
emulator: ERROR: ANDROID_SDK_ROOT is undefined
I Googled the error and found the advice that I needed to install "ARM EABI v7a System Image" but when I ran the SDK manager it told me that this component was already installed.
Can anyone please tell me either how to overcome the ANDROID_SDK_ROOT undefined problem or advise how otherwise to set up an emulated test environment that works on my computer.
I am an experienced programmer but a complete novice when it comes to Android Studio, all the associated applications and Android devices in general.
Many thanks in advance for your patience.
Keith

writerman said:
... following error message:
VT_Not_Support = This computer does not support Intel Virtualization Technology (VT-x). HAXM cannot be installed."
Click to expand...
Click to collapse
Keith, have you tried enabling VT-x in your BIOS settings?

Thanks for the suggestion. I wasn't aware of this BIOS setting. I will give it a try but may not have a chance to try it out until the weekend

This should do the trick if you have compatible CPU.

[Q] [HELP] sqlite and BackgroundTask

Hi,
I'm trying to implement a backgroundTask in an Universal Windows App (Windows phone runtime 8.1) and I need to do a consult in the database of the App in order to connect to my webservice on the cloud. The foreground of App uses sqlite-net nuget package without problems. But when I add it on the Windows runtime class (backgroungTask) generate 24 errors on the class Sqlite.cs. I have searched more information About this, and I have found other package that is better (because It is compatible with xamarin) that is called: sqlite.Net PCL 3.0.5 So I have installed it in my backgroundTask Project and I get an error that is the following:
Code:
Error 6 Windows Runtime type 'Windows.Foundation.Point' was found in multiple referenced winmd files. Please remove either 'C:\Program Files (x86)\Microsoft SDKs\Windows\v8.1\ExtensionSDKs\Microsoft.VCLibs\12.0\References\CommonConfiguration\neutral\platform.winmd' or 'C:\Program Files (x86)\Windows Kits\8.1\References\CommonConfiguration\Neutral\Windows.winmd' from the list of referenced files.
I don't know what I can do with this error. Could you help me to use sqlite in my background task?
Thank you!!

Hi again,
I have got to solve the error that I have comment because the sqlite.net pcl doesn't need vclibs12 so I delete this and then I get 24 errors. All are of one kind error, DateTime. It returns the next message:
Code:
Error 9 Method 'Tarea.UnixToDateTime(System.Int64)' returns 'System.DateTime', which is not a valid Windows Runtime type. Methods exposed to Windows Runtime must return only Windows Runtime types.
Then, the information that I have on this format, how could I get them? Or Have I change all code and the database with other type?
Thank you again!

A DateTime is just a 64-bit number underneath, with a little metadata about time zones and such. You should be able to either create a C++/CX struct for it, or just pass the int64_t and re-build the datetime on the other side.

GoodDayToDie said:
A DateTime is just a 64-bit number underneath, with a little metadata about time zones and such. You should be able to either create a C++/CX struct for it, or just pass the int64_t and re-build the datetime on the other side.
Click to expand...
Click to collapse
Hi goodDaytoDie!
Thank you by your ideas, I have changed the type of data of the Database to int64 and I have calculated the date with DateTimeOffset (this works on backgroundTask). In addition, I didn't know this type of data, but I like it because it allows get the date on different time zones without making nothing.
Thanks!!:good:

some error during installation

when i am trying to install remix os player it showing this error can any one tell me how to solve it C:\WINDOWS\SYSTEM32\Qt5Widgets.dll is either not designed to run on Windows or it contains an error. Try installing the program again using the original installation media or contact your system administrator or the software vendor for support. Error status 0xc000007b

Gradle Sync Error

Hello, I am trying to get android studio working on my debian computer but when I installed it every time I either try to open an existing project or start a new one I get the error "gradle sync failed: process 'command '/usr/android-studio/jro/bin/java' ' finished with non-zero exit value 2. I tried downloading the latest gradle and re-downloading android studio and neither have worked.

Hi Zachdog,
Have you found a solution yet?
I have the exact same problem, been working on it for days now.
I tried:
* for more then a few hours to find a solution online (mainly stackoverflow)
* change a AS compiler setting (heap size) as follows: Configure > Settings > Build, Execution, Deployment > Compiler> Change Build process heap size (Mbytes) to 1024 and Additional build process to VM Options to -Xmx512m
* deleted the MyFirstApp project and started over again
* read the AS idea.log
* searched more on the internet
* 'run' the app, which resulted in: "Error running build: Module 'MyFirstApp' is not backed by gradle"
* restart AS and PC
* in Project Setting > Gradle i have "use defeault Gradle wrapper (recommended)"
* in Project Structure > JDK Location i have "Use embedded JDK (recommended)"
* Re-installed android studio.
Version info:
Ubuntu 16.04.1 LTS
Android Studio 2.2.1
Android plugin version: 2.2.1.
Gradle version 2.14.1
Java Version 8 Update 101
Now i am out of options. Please help me solve these grradle errors.

Android Studio 3.1.3: Error message 'Cannot find symbol: View'

I'm new to Android development and I just started playing with Android Studio 3.1.3. I'm following a tutorial from android.developer.com and I'm on the part: Start Another Activity - Respond to the Send button. Thing is, when I add the sendMessage() method stub, I get an error message saying the symbol View cannot be found. I tried the following steps to resolve the issue but I'm not successful:
- Place the cursor on View then click ALT-ENTER but the menu Import class doesn't appear.
- I clicked File - Invalidate Caches/Restart
Any useful assistance is welcome.
Christopher