Develop Reference

how to update opencv manager?

does someone know how to install opencv manager higher than 3.0.0 version on android emulator ?! the only version available on play store or other apk web sites is 3.0.0
I'm using android studio emulator.

Install android sdk in eclipse without downloading full os

I would like to install the SDK for several android platforms on my chromebook using Ubuntu with crouton when I get it. The problem is that the chromebook I might get only has 16gb minus the OS. Installing the android SDK to eclipse also seems to install the whole emulator as well and it takes up A LOT of storage. Last time I did it I install 3 SDKs and the total space was almost 10gb.
Is there a way to install just the bare essentials for android development?
I don't want to run an emulator since I have several devices at my disposal and the chromebook won't be able to handle it anyway. Thanks! :)

Assuming you already have a JDK installed, the bare minimum you need for Android development is the standalone SDK, the platform tools, and at least one version of the Android platform. All of that takes up less than 1/2gb.
You can get the standalone SDK from here. Scroll down to the bottom and it's under Other Download Options / SDK Tools only. Once you have that downloaded and unzipped somewhere, go into the android-sdk-linux/tools directory and run the android command there. It will popup the Android SDK manager. Uncheck everything except for the following and click install:
Tools
Android SDK Platform-tools
Android SDK Build-tools
Android 5.1.1. (API 22) // or different version
SDK Platform
Google APIs
Extras
Android Support Library
other packages if your app needs them
You can find more information about how to use the standalone SDK for setting up your project and whatnot here.

which packages do i install from sdk manager in android studio

i was installing android studio
and when i went to sdk manager it told me to install 10 packages by default .. while these packages were installing i lost my internet connection so i cancelled the whole process. now when i opened the android studio again on the home screen it says rendering fail and the phone which shows up in the middle of the screen (design view ) doesn't show up. i guess this happened due to some packages where not installed .. so i want to know what the the basic packages that i need to install. could someone post a list or a screen shot of your installed packages

You need
Android SDK tools
Android SDK platform-tools
Android SDK build-tools
Install everything in Android 5.0.1 (API 21) - or whatever the version you want
From Extras: Android Support Repository, Android Support Library, Google Play Services, Google Repository, Android Auto API Simulators, Intel x86 Emulator Accelerator(HAXM installer)
FYI, I'm using Eclipse IDE, so the names can be different. But these will be there in Android Studio too

Recommended packages by android developers
Android SDK Build Tools - Includes tools to build Android apps.
Android SDK Platform-tools - Includes various tools required by the Android platform, including the adb tool.
Android SDK Tools - Includes essential tools such as the Android Emulator and ProGuard.
Android Support Repository - Includes local Maven repository for Support libraries, which provide an extended set of APIs that are compatible with most versions of Android. It's required for products such as Android Wear, Android TV, and Google Cast.
Google Repository - Includes local Maven repository for Google libraries, which provide a variety of features and services for your apps, such as Google sign-in, Google Maps, Games achievements and leader boards, and much more.
In the SDK Platforms tab, you must also install at least one version of the Android platform. Required. At least one platform is required in your environment so you're able to compile your application. In order to provide the best user experience on the latest devices, use the latest platform version as your build target.

Creating Android App

I'm installing qt-everywhere-opensource-src-5.2.1.zip for windows and I want to be able to use this to create an Android app using Visual Studio 2010. Am I going about this the right way? Will this version of Qt work for an Android app and is it ok to use Visual Studio 2010 for this kind of thing? I'm coding in C++.
Thanks

You should download and install:
Qt 5.x here.
Android SDK (ver. 22+) here
NDK (ver. r9+) here
If you don’t plan to create Android Java apps, then make sure you are downloading ONLY the SDK and not ADT Bundle or Android Studio.
After downloading extract them, open Android SDK (you should have a connection to Internet) and download the desired tools, you have to install at least Android API-13! You also must install Android SDK Platform-tools and Android SDK Build-tools.
Open Qt Creator. Goto Tools->Option->Android settings page and set Android SDK and NDK locations.

Install old system image with Android Tools R21

I'm stumped after doing a fresh install of Android Development Tools r21. http://developer.android.com/sdk/index.html
I've installed this and I am looking to create an AVD for Android 2.1 (API 7) to test some things, but I cannot find an option to install the Android 2.1 system image. In fact, nothing prior to Android 4.0 is an available system image for an AVD.
I've installed the SDK Platform but it doesn't include the system image. Based on the Official Add-on Sites, I tried to go to https://dl-ssl.google.com/android/repository/sys-img.xml but this is essentially an empty XML file.
I've also checked the ADT Known Issues http://tools.android.com/knownissues
Finally, from How install old ADT13 in Eclipse I gleaned the possible add-on site of https://dl-ssl.google.com/android/repository/repository.xml, but that doesn't pull anything into the SDK Manager either.
Does anyone know how to get this working?
Android SDK Manager
Android SDK Manager - Add-on Sites

I've solved my own issue. Apparently starting in Android Developer Tools R21
System images of Android 4.0 and newer
Installed by checking the ARM EABI v7a System Image box in the Android SDK Manager
System images of older than Android 4.0
Installed by checking the SDK Platform box in the Android SDK Manager
This was the source of confusion.
Additionally you must restart Eclipse to get it to be an available option, which I didn't do.