如何修改Android Studio新项目默认SDK及BuildTools版本至27？

Hey there! Let me break down two solutions for you—one that modifies the template path you found, and a far better, sustainable global setting that avoids having to tweak templates every time Studio updates.

Since you already located the template folder at C:\Program Files\Android\Android Studio\plugins\android\lib\templates\gradle-projects\NewAndroidModule\root, here's exactly what to edit:

• Look for the file named build.gradle.ftl (it’s a FreeMarker template that generates your project’s build.gradle file)
• Open it with a text editor (you’ll likely need admin permissions to save changes—copy the file to your desktop first, edit, then replace it back if you hit permission roadblocks)
• Find the lines defining compileSdkVersion and targetSdkVersion—change their values from 26 to 27
• If buildToolsVersion isn’t already present, add it under the compileSdk line like this:

  buildToolsVersion "27.0.3"
  

• Save the file, and next time you create a project, it’ll use your desired versions automatically.

Heads up: This change will get overwritten if you update Android Studio, so it’s a temporary fix at best.

This method sets default values for all new projects, and won’t be wiped by Studio updates. Here’s how to do it:

• Open Android Studio, go to File > New Projects Setup > Structure for New Projects (this menu is dedicated to configuring defaults for every new project you create)
• In the left sidebar, select Project:
  • Set Project SDK to Android 27 (make sure you’ve already downloaded this SDK via the SDK Manager first)
• Next, go to Modules > Default Config in the left sidebar:
  • Set Compile Sdk Version to 27
  • Set Target Sdk Version to 27
• To lock in the buildToolsVersion globally, open your user-level gradle.properties file at C:\Users\[Your Username]\.gradle\gradle.properties and add this line:

  android.buildToolsVersion=27.0.3
  

• Save all settings, and from now on every new project will automatically use SDK 27 and buildTools 27.0.3 without any manual edits.

Pro tip: Before setting this up, double-check that you’ve installed Android 27 SDK Platform and Build Tools 27.0.3 via File > Settings > Appearance & Behavior > System Settings > Android SDK.

内容的提问来源于stack exchange，提问作者Damn Vegetables