Android中BuildConfig.BUILD_TYPE始终为Release，调试时获取错误URL的问题

Hey there, let's break down why your Debug build is still showing Release for BuildConfig.BUILD_TYPE—this is a super common gotcha with Android Gradle builds, and there are a few likely culprits to check:

1. Accidental Build Type Override in Gradle #

Double-check your app-level build.gradle (or build.gradle.kts) file. It's easy to accidentally hardcode the build type or misconfigure variants without noticing. For example:

If you have something like this in your buildTypes block, it would force the build type value regardless of your selected variant:

buildTypes {
    release {
        // ... your release config
    }
    debug {
        // Oops! This manual override overwrites the auto-generated value
        buildConfigField "String", "BUILD_TYPE", "\"release\""
    }
}

Fix: Remove any manual BUILD_TYPE field definitions—Android generates this value automatically. Let the Gradle plugin handle it natively.

2. Stale Android Studio Build Cache #

Sometimes Android Studio's build cache holds onto old BuildConfig files even after you switch variants. This happens especially if you've been toggling between builds quickly.
Fix:

• Go to File > Invalidate Caches... > Invalidate and Restart to clear the cache fully.
• Alternatively, run a clean build from the terminal to ensure fresh outputs:

  ./gradlew clean assembleDebug
  

3. Misselected Build Variant #

It's possible you think you're running the Debug variant, but Android Studio is actually targeting the Release variant under the hood.
Fix:

• Check the variant selector in the top toolbar (the dropdown with options like debug, release, etc.) and make sure debug is selected.
• If using a Run/Debug configuration, verify that the configuration is set to use the debug build variant in its settings.

4. Library Module Dependency Conflicts #

If your app module depends on a library module that defines its own BuildConfig.BUILD_TYPE, there's a small chance the library's value is overriding your app's. This is rare but can happen if the library uses the same field name.
Fix:

• Check the library's build.gradle for any custom buildConfigField entries for BUILD_TYPE.
• Ask the library maintainer to remove that custom field, or rename your app's field (though ideally you should rely on the auto-generated one).

5. Product Flavor + Build Type Mix-Up #

If you're using product flavors, make sure you're not accidentally selecting a variant that combines a flavor with the Release build type. For example, a variant like freeRelease would still show release as the build type, even if you intended to run a Debug build.
Fix:

• Confirm you're selecting a variant that ends with Debug (e.g., freeDebug, paidDebug) from the variant selector.

Once you work through these checks, your BuildConfig.BUILD_TYPE should correctly reflect the active build type. Let me know if you hit any snags!

内容的提问来源于stack exchange，提问作者Liru