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My gradle file:

apply plugin: 'com.android.application' android { useLibrary 'org.apache.http.legacy' compileSdkVersion 23 buildToolsVersion "23.0.0" defaultConfig { applicationId "com.skripsi.irwanto.paud" minSdkVersion 15 targetSdkVersion 23 versionCode 1 versionName "1.0" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProauardFile('proguard-android.txt'), 'proguard-rules.pro' } } } dependencies { compile fileTree(include: ['*.jar'], dir: 'libs') testCompile 'junit:junit:4.12' compile 'com.android.support:appcompat-v7:23.1.11 }

And I get Warning:Unable to find optional library: org.apache.http.legacy

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2
  • 5
    Your code is an image... of the build.gradle? Hmmm. No. It doesn't work like that. Post your code and your logcat in their text form. Commented Nov 24, 2015 at 16:29
  • for me i removed this line (useLibrary 'org.apache.http.legacy') and changed my target SDK to 22 Commented May 22, 2016 at 15:59

6 Answers 6

Reset to default
79

I guess, the easier way to solve this issue without having to reinstall the SDK is to create a file called optional.json in <sdk-path>\platforms\android-23\optional\ directory with the following content:

[ { "name": "org.apache.http.legacy", "jar": "org.apache.http.legacy.jar", "manifest": false } ]

It solved the problem for me.

EDIT: Information taken from @domoch's answer below on how to locate your SDK location

To Locate your Android SDK's Location

Go to Android Studio Settings -> Appearence & Behavior -> System Settings and look for Android SDK Location. In Windows, it usually would be pointing to C:\Users\<username>\AppData\Local\Android\sdk.

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13 Comments

This did not solved the problem for me. I still have the warning and the project does not compile
Do you have more than one SDK versions installed? Are you updating the correct folder?
one sdk version installed, a have copied http.legacy.jar to libs and i still get the error
@ventura8: Maybe trying to reinstall Android Studio with a new SDK might be the solution for you. Have you tried that?
@ventura8: Did you get it working? I am also facing same issue
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27

I had exactly the same issue. Please check if you have android-sdk-windows\platforms\android-23\optional\optional.json file in place. If not then just reinstall API 23 (remove and install again).

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2 Comments

This worked for me! From a fresh install of Android Studio with a new SDK this file appeared to be missing. It was still missing after updating all of the API 23 packages. Deleting all the API 23 packages and re-installing worked.
Well, I'm not going to question why that file disappeared but thanks!
3

Why? If you use Android Studio on Windows then optional.json file should be not only in \Program Files (x86)\...\platforms\android-23\optional\ .

So: go to Android Studio Settings -> Appearence & Behavior -> System Settings and look for Android SDK Location, copy (or create) optional.json in corresponding folder. Or just edit Android SDK Location to \Program Files (x86)\...

In my case Android SDK Location was C:\Users\Usernade\AppData\Local\Android\sdk and there was no optional.json file.

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1

  1. Settings -> Appearence & Behavior -> System Settings and look for Android SDK Location

  2. platforms/Android 23/optional/

  3. org.apache.http.legacy jar file is copy and paste your android studio project lib and this jar file gradle compile files('libs/org.apache.http.legacy.jar')

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0

The error is that the optional.json file is not in the <sdk-path>\platforms\android-23\optional\ folder.

I solved this by the following:

  1. Go to the sdk manager
  2. Select Android Sdk and updates are available in the Appropriate API level.
  3. Just update it.
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0

I know this is pretty ol' one. However, if any1 sees this and wonders what else can be done. Than go and check whether the SDK path is set in Env Vars. Because the path might be using anything like this "$(ANDROID_HOME)".

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