Why Warning:Unable to find optional library: org.apache.http.legacy occurs?

Question

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

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. — Phantômaxx, Nov 24 '15 at 16:29
for me i removed this line (useLibrary 'org.apache.http.legacy') and changed my target SDK to 22 — Ahmed Adel Ismail, May 22 '16 at 15:59

Vite Falcon · Answer 1 · 2016-02-05T16:01:22.537

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.

edited Feb 05 '16 at 16:01

answered Nov 28 '15 at 10:13

Vite Falcon

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This did not solved the problem for me. I still have the warning and the project does not compile – ventura8 Jan 11 '16 at 06:35
Do you have more than one SDK versions installed? Are you updating the correct folder? – Vite Falcon Jan 11 '16 at 07:00
one sdk version installed, a have copied http.legacy.jar to libs and i still get the error – ventura8 Jan 15 '16 at 12:43
@ventura8: Maybe trying to reinstall Android Studio with a new SDK might be the solution for you. Have you tried that? – Vite Falcon Jan 16 '16 at 04:35
make sure you have compileSDKVersion set to 23 – Khurram Shehzad Jan 18 '16 at 10:48
i have reinstalled android studio and android sdk and i still get that error – ventura8 Jan 21 '16 at 10:16
@ventura8 do you see the JSON file in that directory AND the jar file there? Does the JSON file have the contents like above? Is your Android Studio using the reinstalled SDK? – Vite Falcon Jan 21 '16 at 11:13
I see the json file and the jar file. the json file has the content from above. My Android studio is using the reinstalled sdk. it still does not compile. i am baffled – ventura8 Jan 22 '16 at 09:02
1

@ventura8: Did you get it working? I am also facing same issue – Sagar Trehan Feb 03 '16 at 05:17
@SagarTrehan nope. not yet. really hopping somebody with more experience looks at this. – ventura8 Feb 16 '16 at 08:44
@ventura8 did you get it? Am sitting over the same issue for over 10 hours! – Lakshmi Narayanan Sep 29 '16 at 02:08
@LakshmiNarayanan i did not get it. i still am unable to compile. – ventura8 Sep 29 '16 at 05:24
At the risk of stating the obvious (and being aware I'm posting this to a thread where android-28 didn't exist at the time...): This indeed also happens in android-28, and the same fix applies. – splrs Mar 27 '19 at 17:38

score 27 · Answer 2 · answered Nov 25 '15 at 11:04

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).

answered Nov 25 '15 at 11:04

pratt

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14
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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. – Dave Dec 01 '15 at 19:22
Well, I'm not going to question why that file disappeared but thanks! – Daniel Wilson Jul 17 '16 at 10:09

score 3 · Answer 3 · answered Feb 04 '16 at 12:29

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.

score 1 · Answer 4 · edited Mar 14 '16 at 04:49

1

Settings -> Appearence & Behavior -> System Settings and look for Android SDK Location
platforms/Android 23/optional/
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')

edited Mar 14 '16 at 04:49

sschale

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answered Mar 14 '16 at 04:15

Kamlesh Lakhani

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score 0 · Answer 5 · edited Sep 18 '16 at 07:20

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:

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

edited Sep 18 '16 at 07:20

James K

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answered Sep 18 '16 at 06:45

Ratheesh Maithadam

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score 0 · Answer 6 · answered May 24 '23 at 12:07

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)".

answered May 24 '23 at 12:07

Simon Tomek

1
1

1

Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community May 25 '23 at 07:34

Why Warning:Unable to find optional library: org.apache.http.legacy occurs?

6 Answers6

To Locate your Android SDK's Location

Linked