When you first use Android Studio to write programs, you will often encounter “ErrorUnable to Tunnel through” during the run phase

Proxy. Proxy returns HTTP1.1 400 Bad Request. Now, I’m going to go into detail in a graphical way

Describe steps to solve the problem.

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Solution (follow the steps in the diagram) :

Go to Android Studio Settings

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Go to Settings, double add Gradle, click on the red circle and select gradle version:

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After the selection, all the way OK exit can be. If you do not have Gradle you can go to:

Services.gradle.org/distributio… Go download it, unzip it, and then you can choose from it.

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