Having trouble building a Plugin using Android Studio

Background
I'm new to Android Studio and native plugins in general, so I am following this tutorial trying to make a basic plugin:

Problem
According to Unity documentation, I should be using JDK 6 (v1.6). I downloaded JDK 6 and set Android Studio to point to it (File->Project Structure).

But when Gradle tries to sync the project, it spits out the error:
"compileSdkVersion android-22 requires compiling with JDK 7)"

I'm confused, does that mean I can't create native plugins for Unity with the latest Android version then?

 

You should be able to use the most recent version of the Android SDK - I have not had any issues doing so.

On my Mac, javac -version returns "javac 1.8.0_45"

Here is the Android Studio generated gradle script for one of my plugins:

Code (gradle):

1. apply plugin: 'com.android.library'
2.  
3. android
4. {
5.   compileSdkVersion 22
6.   buildToolsVersion "22.0.1"
7.   defaultConfig
8.   {
9.     minSdkVersion 9
10.     targetSdkVersion 22
11.     versionCode 1
12.     versionName "1.0"
13.   }
14.   buildTypes
15.   {
16.     release
17.     {
18.       minifyEnabled false
19.       proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
20.     }
21.   }
22.   productFlavors
23.   {
24.   }
25.   compileOptions
26.   {
27.     sourceCompatibility JavaVersion.VERSION_1_6
28.     targetCompatibility JavaVersion.VERSION_1_6
29.   }
30. }
31.  
32. dependencies
33. {
34.   compile fileTree(dir: 'libs', include: ['*.jar'])
35.   compile 'com.android.support:appcompat-v7:22.2.1'
36. }

Maybe updating to a more recent version of Java, but making sure to set the source and target compatibility to 1.6 might work?

HTH