Test drive on flutter: android.jar file not found

Question

I'm just trying to run the first app and this is what happens:

FAILURE: Build failed with an exception.

• What went wrong: A problem was found with the configuration of task ':app:processDebugResources'.

  File 'C:\Users\XXXX\Appdata\Local\Android\sdk\platforms\android-28\android.jar' specified for property 'androidJar' does not exist.

• Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 15s Gradle task assembleDebug failed with exit code 1 Exited (sigterm)

The file is on the android-29 folder? what should I do?

Answer 1

Image Please update your android sdk.

You don't have install api 28. Please open your android sdk and install android sdk 28.

Answer 2

This error might occur because of android.jar is in another folder

Try opening

C:\\Users\\XXXX\\Appdata\\Local\\Android\\sdk\\platforms

and then look for a folder named android-29 or android-27 and you should be able to find android.jar in that folder just copy that file and paste it into to android-28

Answer 3

It worked for me too to fix the specified for property 'androidJarInput.androidJar' does not exist.

I Copied the android.jar from android-32 into android-31

Answer 4

Not only android.jar is missing from my android-xx folder, then copy android.jar from other folder could solve this problem but I still have another problems when combine.
So I do a workaround

• First, I delete this android-xx folder from Android\sdk\platforms
• Then, I create a new empty project
• Next, inside app\build.gradle of new project, I set both compileSdk and targetSdk to xx
• Sync and run new project
• Finally, android-xx will contains all the files

I dont know if delete the old android-xx before create new project is required or not. but I deleted it to make sure their is no other problem when replacing file

Answer 5

For some reason, android.jar is't automatically downloaded or built when installing specific Android SDK versions. This oversight means Flutter cannot find the android.jar , since it doesn't exist.

One solution, after installing the SDK version, is to manually download the android.jar for your desired SDK version from the following GitHub repository:

https://github.com/Sable/android-platforms

Make sure to put the android.jar file in the correct location, replacing XX with your version number:

Windows

C:\Users\XXXX\Appdata\Local\Android\sdk\platforms\android-XX\android.jar

OS X

Users/<username>/Library/Android/sdk/platforms/android-XX/android.jar