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How to make project addable to other projects gradle

I don't know if Im understanding it right, but how do i make a project become addable on android gradle's dependency, more like facebook's sdk where we add compile 'com.facebook.....'. I'm new to this topic so please guide me. Thanks.

If you want to add another gradle project in your current one. (assuming it is inside the current projects root directory)
in settings.gradle file add
include ':name-of-the-dir-of-the-project-you-want-to-include'
in build.gradle
dependencies {
compile project(':name-of-the-project-you-want-to-include')
}

How do I use another library in my app?

The title is a little misleading but I honestly don't know how to word it in any other way. This is my project structure:
I want to use the highlighted (fasteranimationscontainer-master) in my current app that I'm working on. I imported it by putting the jar file in my library folder then adding it to my library through Android Studio. But I try to create an object of that imported library, it doesn't show up/import.
I'm still learning how to use android studio so any help would be much appreciated!

1. Library with only the Source Code
To include a library with only the source code (like FasterAnimationsContainer) to your project, you only need to import it as a module from File -> New-> Import Module in Android Studio:
There should be a dialog for the project folder, enter the path where your library reside.
Then you need to add the module to your app build.gradle as a dependency:
android {
...
dependencies {
...
compile project(':fasteranimationscontainer')
...
}
}
Now you can use it in your project.
2. Library from Maven or JCenter
To add dependencies to your project where the library has uploaded to maven or jcenter, you need to modify your app build.gradle file and add extra lines configuring the packages you require. For example, for certain Google or Android, dependencies look like:
android {
...
dependencies {
// Google Play Services
compile 'com.google.android.gms:play-services:6.5.+'
// Support Libraries
compile 'com.android.support:support-v4:22.2.1'
}
}
Try to always read the library README first.
Suggestion:
If you still learning using Android Studio, you can read Using Android Studio. Then read Getting Started with Gradle, because Android Studio is tightly related with Gradle.

How to import a library from github?

I don't understand how to add a library in my new project.
https://github.com/txusballesteros/bubbles-for-android
I saw similar posts but I don't get the library in my project.
Error:Configuration with name 'default' not found.
And when I add the library can I change the original source code and can I use it because I read about the same License ?
Please help me, I was trying many methods and I failed.

Locate your build.gradle file:
Go to android view (easiest this way)
Locate Gradle Scripts folder:
Locate your correct build.gradle file (watch it, there are 2 of those who look similar):
Add the this statement (compile 'com.txusballesteros:bubbles:1.2.1') according to picture:
Good to go

Add the library dependency in your app level build.gradle file(not project level). you don't need to download any library file just add this dependency and sync the project
dependencies {
...
compile 'com.txusballesteros:bubbles:1.2.1'
}

Add following to your Build.Gradle under dependency block and then sync. project. Now you can use that library methods in your code.
compile 'com.txusballesteros:bubbles:1.2.1'

Including android.support.v7.app dependency in Android Studio

I'm migrating from Eclipse over to Android Studio and am looking at the Navigation Drawer example from Google. Right away, I see that I get this warning;
It looks like I need to use the v7 library rather than the v4. I can't figure out how to do this. In Eclipse, I just added a dependency from the build tools, but I see no such option in Android Studio. If I look at the build.gradle file, I can see this:
dependencies {
compile 'com.android.support:support-v4:21.0.3'
}
I just downloaded Android Studio yesterday, so I think that I should have this dependency somewhere, but I just don't know how to include it. Can someone tell me how to do this?

From within Android Studio, you can go to File, Project Structure, select your module, and go to the Dependencies tab - you'll see a list of dependencies - you can add new dependencies via the + sign near the bottom of that screen - it will automatically suggest the most popular libraries and all Google libraries including the one you want: appcompat-v7. This controls the build.gradle file and, in your case, adds the line:
compile 'com.android.support:appcompat-v7:21.0.3'
Note that you can also use sites such as Gradle, please to manually figure out what the dependency should be and add it to your build.gradle file yourself if you'd like.

Proper way to add global library in android-studio/gradle

First of all, I know how to add a local library to the build.gradle file, it was discussed in several questions here already (which are all basically the same), see here, here and here. But you have to hardcode the paths in the compile files('/path/to/lib.jar') statements in the build.gradle file, which isn't nice, not redistributable, etc, IF you use a library not within the project's folder structure. I prefer to maintain this library for all my projects in the same place (so it is always up to date for all projects etc.). So I would like to know how to add a library, which is not available via Maven, to an Android-Studio project using gradle, in a sane way, given that the library is added as a global library in AS's preferences.
What I have done so far:
I use Google's new Android-Studio, which uses gradle for the build management, to build an Xposed framework module. For that, I have to include an external library, XposedLibrary, which I downloaded from the respective Github repository to keep it up-to-date.
It contains the jar XposedLibrary/XposedBridgeApi.jar, which I added in AS as a global library (Ctrl+Shift+Alt+S -> Global Libraries -> green plus to add the folder XposedLibrary). The compilation failed, complaining that it doesn't know the imported classes. So I had to manually add the library to the build.gradle file, adding the respective line in the dependencies like so:
dependencies {
compile files('libs/android-support-v4.jar')
compile files('/home/sebastian/dev/android/XposedMods/XposedLibrary/XposedBridgeApi.jar')
}
I tried out to just add compile files('XposedBridgeApi.jar') or compile files('XposedLibrary/XposedBridgeApi.jar') but this didn't work.
So, what is a nice way to add an AS global library to the dependencies without using full paths? (I don't like the idea of symlinking to the jar file from within the lib/ folder ;) )

when referencing a file via
files("relative/path/to/a.jar")
the relative path is evaluated relative to the buildscript this snippet is in. so when your build.gradle file is located in let's say '/a/project/build.gradle' then the jar should be in '/a/project/relative/path/to/a.jar'. In a multiproject gradle build you can put the the jar in a folder relative to the root - project and reference it in all subprojects via
rootProject.files("relative/to/root/a.jar")
hope that helps,
cheers,
René

This post describes how to get XposedBridgeApi.jar working with Gradle in Android Sudio: http://forum.xda-developers.com/showpost.php?p=41904291&postcount=1570

I think here is the proper way:
Import Xposed in Android Studio
Edit the /app/build.gradle like this:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
provided fileTree(dir: 'deps', include: ['*.jar'])
}

The best way is to use "provided files('src/XposedBridgeApi-54.jar')" as the lib isn't allowed to be included in the module, because the XposedBridge is already installed on the phone.

With Android Studio, you have to first understand that the IDE uses the same model for a project that your command line build (gradle) uses. That is why the Project Structure dialog has a pop up that says edits here will have no effect. So adding a global library will also have no effect.
The correct way to fix such issues is to edit your gradle build scripts so that the command line gradle build works properly. Then you should just have to click on "Tools | Android | Sync Project with Gradle files" menu item to refresh the project structure in the IDE.
Finally, if your dependencies are not going to be in Maven Central, then you'd have to create a local maven repository. Read the thread here: https://groups.google.com/d/msg/adt-dev/eCvbCCZwZjs/vGfg-4vNy9MJ for background.