Develop Reference

Why do I need to install the JDK to build a Unity app when only the Android SDK is used?

I have looked at this page but I don't understand why I have to install the Java Development Kit (JDK), when it doesn't appear to be used in the tutorial.
Can someone please explain this?

Because you need JDK to develop android application. Usually this was bundled with android studio so you don't need to install JDK. And also basically, Android at its core is java.

JDK - Java Development Kit
It is required as it consists of JVM - Java Virtual Machine. It is also needed as it converts your class to bytecode. It is the base of Application Proramming related to Android.

Is there a difference in the android SDKs available for androidStudio and eclipseADT?

I am migrating to android Studio from eclipseADT, Can I use the same android sdk's from eclipse?
I used the following links to migrate:
Exporting from eclipse.
Importing to Android studio.

You could also look over this link: http://developer.android.com/sdk/installing/migrate.html
And yes of course you can use the same android SDK.

SDK stands for Software Development Kit and has nothing to do with the different IDEs(Eclipse, Android Studio) really. The IDE will use the SDK of course but the SDK is unaware of which IDE is using it. You should have no problems with using the same SDK, you just have to set some paths in Android studio.

After downloading NDK r8 whether I need to download more or not?

I have downloaded android-ndk-r8b.zip(180MB),but I want to know if I need to download anything else?
I am using the NDK because I want to use C/C++ native code (used in tesseract3.0 project) in my android library.
I am using Eclipse IDE(Indigo).
I also installed the following
installed CDT from Eclipse update site http://download.eclipse.org/tools/cdt/releases/indigo.
installed Android SDK + NDK Plugins from Eclipse update site https://dl-ssl.google.com/android/eclipse/

If you want to code under Indigo you do not need anything else, however i found Eclipse to be an horrible IDE for C and C++ and i suggest to code with just a text editor and a terminal because it's just more flexible and reliable.

To develop in android using eclipse you need: Android-SDK, Android-NDK and eclipse plugin.
If you use windows you also need to install cygwin version 1.7 or greater.
You need gnu Make 3.81 or later and a recent gawk (include them during cygwin installation).

See http://developer.android.com/tools/help/adt.html for the detailed explanations. In addition to eclipse and SDK, you should install ADT Plugin. Form version 20, the plugin supports native development, in addition to java.

Installing Android Plugin Error with Eclipse Juno 4.2.0

I downloaded Eclipse-Juno Version: 4.2.0.
But I am not able to install Android ADT on it. I am getting this error:
requires 'org.eclipse.wst.sse.core 0.0.0' but it could not be found
System Configurations: Win-7, 32-bit
I tried installing ADT-15.0.1 and ADT-16.0.1, but they are not working.
I know the same issue is faced with versions lower version than 3.7, but why also with 4.2?

What package of Juno did you install? ADT requires part of the WST project, but I suspect that the Juno package you have doesn't include WST and probably doesn't include the update repository to automatically get it.
EDIT: Try using the Eclipse for Java EE Developers package as your starting point, as it includes WST features. Alternatively, you could try adding the Juno update site to your Eclipse and see if ADT gets it's required features. The Juno update site is http://download.eclipse.org/releases/juno/

Yes, I installed Juno and that package I installed did not come with WST either.
I fixed this same problem by adding Juno update site at http://download.eclipse.org/releases/juno/. You will find WST under "Web, XML, Java EE and OSGi Enterprise Development. For my own purpose I simply installed everything under this category and the problem went away.

try this https://developers.google.com/eclipse/docs/install-eclipse-4.2
or use this -- > http://dl.google.com/eclipse/plugin/4.2 <-- for instal android
works for me

Glad I came across this question! That said though, it appears I only needed to install the Eclipse XML Editors and Tools part of Web, XML, Java EE and OSGi Enterprise Development to resolve this. Cheers!

Install in eclipse:
http://dl.google.com/eclipse/plugin/4.2
It works well for me too.

I had the same problem which I solved by downloading ADT-20.0.0.zip. I think different versions of eclipse support different versions of ADT.

Which Eclipse IDE to use for android development?

I want to know which Eclipse IDE to use for android development.
The following url http://www.eclipse.org/downloads/ shows a lot of option.
Right now i am using Mac OS X v 10.6.4.

"We recommend the "Eclipse Classic" version. Otherwise, you should use a Java or RCP version of Eclipse."
Quote from Android Developers: http://developer.android.com/sdk/installing/installing-adt.html

Take the second - Eclipse IDE for Java Developers, 99 MB

Here's a link to Android SDK requirements.
Looks like Eclipse 3.6.2 (Helios) or greater is required at the time of this answer. Because you'll be using the ADT Plugin for Eclipse, check out this page for Eclipse version requirement and other info. The version will probably always match the one stated on the SDK page.
If you decide on Eclipse IDE for Java Developers from the above package, get it here.