如何修改Android Studio默认行为？能否将默认布局设为Relative Layout？

Hey there! Let's walk through your questions about tweaking Android Studio's behavior, starting with your core request to switch default layouts away from ConstraintLayout.

1. Can I change Android Studio's default layout from ConstraintLayout to RelativeLayout? #

Absolutely! This involves modifying Android Studio's built-in template files so every new activity you create uses RelativeLayout by default. Here's the step-by-step breakdown:

Step 1: Locate the template files #

The path varies by operating system:

• Windows: Navigate to C:\Program Files\Android\Android Studio\plugins\android\lib\templates\activities\common\root\res\layout
• Mac: Go to /Applications/Android Studio.app/Contents/plugins/android/lib/templates/activities/common/root/res/layout

Step 2: Update layout template content #

You’ll find files like simple.xml.ftl (for Empty Activity) and content.xml.ftl (for Basic Activity). Open each in a text editor:

• Replace all instances of <androidx.constraintlayout.widget.ConstraintLayout> with <RelativeLayout>
• Delete all app:layout_constraint* attributes (these are unique to ConstraintLayout)
• Ensure the root layout has basic width/height attributes:

  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent">
  

Step 3: Remove unused ConstraintLayout dependencies (optional but recommended) #

To cut down on build times and clean up your projects, edit the template's Gradle config:

• Navigate to the parent folder of your target activity template (e.g., EmptyActivity or BasicActivity)
• Open gradle.xml.ftl and delete lines that add ConstraintLayout dependencies, like:

  implementation 'androidx.constraintlayout:constraintlayout:2.x.x'
  

Step 4: Restart Android Studio #

Close and reopen the IDE, and every new activity you create will now default to RelativeLayout!

2. How to modify other default behaviors in Android Studio? #

Android Studio lets you customize nearly every default behavior via its settings panel and template edits:

• General preferences: Head to File > Settings (or Android Studio > Preferences on Mac) to adjust things like default SDK, code style, auto-save rules, or build pipeline settings.
• Code templates: For customizing default code snippets (like class headers or method stubs), go to Settings > Editor > File and Code Templates.
• Build optimization: Speed up clean/rebuild times (your mentioned pain point!) by enabling Gradle offline mode or build cache in Settings > Build, Execution, Deployment > Build Tools > Gradle.

Quick build speed tip #

Since you never use ConstraintLayout, double-check your existing projects' build.gradle files to remove any leftover ConstraintLayout dependencies. This reduces the amount of code Gradle needs to process during builds.

内容的提问来源于stack exchange，提问作者Rohit