Sources for Android API 23 Platform not found (Android Studio 2.0)

Question

Android Studio doesn't redirect me to API sources correctly. When I hit any function it decompiles .class file bytecode instead of accessing the right file from sdk/sources tree. Hitting "download" and "refreshing" options does nothing. It's particularly annoying for implementing listeners since it generates functions' headers without variables' manes from documentation (i.e. var1, var2 etc.). I have installed API 23 (SDK platform, tools, docs, sources). I have set compile and target SDK to 23. I tried to reinstall SDK tools, update AS from canary channel, invalidate cache but nothing helped so far. I switched to API 21 and it works fine.

What am I missing?

My build.gradle:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion '23.0.2'

    defaultConfig {
        applicationId "com.myapp.app"
        minSdkVersion 10
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.3.0'
    compile 'com.android.support:design:23.3.0'
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile project(':volley')
    compile 'com.jakewharton:butterknife:7.0.1'
}

Below you can find gradle output for a blank project (without 3rd party libs) with the same API 23 set and the same behaviour.

Executing tasks: [clean, :app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:mockableAndroidJar, :app:prepareDebugUnitTestDependencies]

Configuration on demand is an incubating feature.
Incremental java compilation is an incubating feature.
:clean
:app:clean
:app:preBuild UP-TO-DATE
:app:preDebugBuild UP-TO-DATE
:app:checkDebugManifest
:app:preReleaseBuild UP-TO-DATE
:app:prepareComAndroidSupportAnimatedVectorDrawable2330Library
:app:prepareComAndroidSupportAppcompatV72330Library
:app:prepareComAndroidSupportDesign2330Library
:app:prepareComAndroidSupportRecyclerviewV72330Library
:app:prepareComAndroidSupportSupportV42330Library
:app:prepareComAndroidSupportSupportVectorDrawable2330Library
:app:prepareDebugDependencies
:app:compileDebugAidl
:app:compileDebugRenderscript
:app:generateDebugBuildConfig
:app:mergeDebugShaders
:app:compileDebugShaders
:app:generateDebugAssets
:app:mergeDebugAssets
:app:generateDebugResValues UP-TO-DATE
:app:generateDebugResources
:app:mergeDebugResources
:app:processDebugManifest
:app:processDebugResources
:app:generateDebugSources
:app:preDebugAndroidTestBuild UP-TO-DATE
:app:prepareDebugAndroidTestDependencies
:app:compileDebugAndroidTestAidl
:app:processDebugAndroidTestManifest
:app:compileDebugAndroidTestRenderscript
:app:generateDebugAndroidTestBuildConfig
:app:mergeDebugAndroidTestShaders
:app:compileDebugAndroidTestShaders
:app:generateDebugAndroidTestAssets
:app:mergeDebugAndroidTestAssets
:app:generateDebugAndroidTestResValues UP-TO-DATE
:app:generateDebugAndroidTestResources
:app:mergeDebugAndroidTestResources
:app:processDebugAndroidTestResources
:app:generateDebugAndroidTestSources
:app:mockableAndroidJar
:app:preDebugUnitTestBuild UP-TO-DATE
:app:prepareDebugUnitTestDependencies

BUILD SUCCESSFUL

Answer 1

For people facing the same problem, the solution is in this post for Linux and in the same topic here for Windows (thanks to Aamir Abro). Basically, you have to edit jdk.table.xml file for API level you are missing. I don't know why, but Android 2.0 and 2.1 RC don't have filled <root type="composite" /> in <sourcePath>. I updated sources' path <root type="simple" url="file://D:/android/sdk/sources/android-23" /> and now it works.

For Windows user file location: C:\Users{USER_NAME}.AndroidStudio2.0\config\options\jdk.table.xml

For Linux user file location: ~/Library/Preferences/AndroidStudioBeta/options/jdk.table.xml

Edit:

For some people resetting SDK location helped source.