This may not be the exact answer for the OP, but is the answer to the Title of the question: How to Update Gradle in Android Studio (AS):

• Get latest version supported by AS: http://www.gradle.org/downloads(Currently 1.9, 1.10 is NOT supported by AS yet)
• Install: Unzip to anywhere like near where AS is installed: C:\Users[username]\gradle-1.9\
• Open AS: File->Settings->Gradle->Service directory path: (Change to folder you set above)->Click ok. Status on bottom should indicate it's busy & error should be fixed. Might have to restart AS

after release of android studio v 3.0(stable), It will show popup, If gradle update is available

OR

Manually, just change version of gradle in top-level(project-level) build.gradle file to latest,

 buildscript {...dependencies {classpath 'com.android.tools.build:gradle:3.0.0'}}

check below chart

The Android Gradle Plugin and GradleAndroid Gradle Plugin Requires Gradle1.0.0 - 1.1.3 2.2.1 - 2.31.2.0 - 1.3.1 2.2.1 - 2.91.5.0 2.2.1+ 2.2.1 - 2.132.0.0 - 2.1.2 2.10 - 2.132.1.3 - 2.2.3 2.14.1+2.3.0+ 3.3+3.0.0+ 4.1+ 3.1.0+ 4.4+ 3.2.0 - 3.2.1 4.6+ 3.3.0 - 3.3.1 4.10.1+ 3.4.0 - 3.4.1 5.1.1+3.5.0 5.4.1+

check gradle revisions

Open File > Project Structure > Project Tab

Android Studio has a built in project structure menu to check and update the gradle and plugin used in the current project.

You can try "AGP (Android Gradle Plugin) Upgrade Assistant..." from the Tools menu.

For those who still have this problem (for example to switch from 2.8.0 to 2.10.0), move to the file gradle-wrapper.properties and set distributionUrl like that.

distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-all.zip

I changed 2.8.0 to 2.10.0 and don't forget to Sync after

On Mac, open terminal and run the following commands as per instructions:

$ curl -s https://get.sdkman.io | bash

then

$ sdk install gradle 3.0

Once the installation is complete, the terminal would ask whether to set it as a default version so type y and make it the default version.

Now open Android Studio -> Terminal and run the following command

Gradle --version

Open your root build.gradle file and change Gradle version like this

Old version:

 dependencies {classpath 'com.android.tools.build:gradle:1.3.0'} 

New version:

dependencies {classpath 'com.android.tools.build:gradle:1.5.0'}

For Gradle version compatibility see this.

I can't comment yet.

Same as Kevin but with different UI step:

This may not be the exact answer for the OP, but is the answer to the Title of the question: How to Update Gradle in Android Studio (AS):

• Get latest version supported by AS: http://www.gradle.org/downloads (Currently 1.9, 1.10 is NOT supported by AS yet)
• Install: Unzip to anywhere like near where AS is installed: C:\Users[username]\gradle-1.9\
• Open AS: File->Settings->Build, Execution, Deployment->Build Tools-> Gradle->Service directory path: (Change to folder you set above) ->Click ok. Status on bottom should indicate it's busy & error should be fixed. Might have to restart AS

Go to File > Settings > Builds,Execution,Deployment > Build Tools > Gradle >Gradle home path

Now, set Use default gradle wrapper and edit Project\gradle\wrapper\gradle-wrapper.properties files field distributionUrl like this

distributionUrl=https://services.gradle.org/distributions/gradle-2.10-all.zip

This works if you only need to set Gradle Version anew:

1. Open Android Project Studio Settings:Go to File -> Settings -> Build, Execution, Deployment -> Android -> Android Project Structure
2. Select Project
3. Choose the Gradle Version which is compatible to the Gradle Plugin you're usingNavigate to Android Project Structure to set the Gradle Version

Try this command in the command line:

./gradlew wrapper --gradle-version latest

It works for me:

just go to '/home/your-user/.gradle/wrapper/dists/'

delete everything inside of this

It will be replaced by android studio

on terminal run: ionic emulate android

Its all...

For me I copied my fonts folder from the assets to the res folder and caused the problem because Android Studio didn't accept capitalized names. I switched to project view mode and deleted it then added it as font resource file by right clicking res folder.

Most of the time you can have Android Studio automatically update the Gradle plugin.

If your Gradle plugin version is behind, Instant Run will mostly likely not work. Therefore if you go to the Instant Run settings (Preferences > Build, Execution, Deployment > Instant Run), you'll see an Update project button at the top right (image below). Clicking this will update both the Gradle wrapper and build tools.

Select android\gradle\wrapperand open gradle-wrapper.properties

change: distributionUrl=https://services.gradle.org/distributions/gradle-older-version-to-new-version.zip

eg: distributionUrl=https://services.gradle.org/distributions/gradle-5.1.1-all.zipand rebuild your project

Other answers mentioned how to update AGP (Android Gradle Plugin).

For updating Gradle itself, if you have set the IDE settings to use Gradle from the wrapper file or the wrapper task (as opposed to using a Gradle installed on your system, if any)...

...you can specify the following code in your top-level build.gradle[.kts] script:

tasks.wrapper {gradleVersion = "7.3.3"// Downloads the full version of the Gradle (with sources and documentation)distributionType = Wrapper.DistributionType.ALL}

Now, instead of editing gradle-wrapper.properties file, run the wrapper task and Sync the IDE:

If your run button is gray. This is how i fixed it.

Go to Run in menu, and then press this:

Then it will run your Emulator, and your run button will become green again and you can use it. That is how i fixed it.