[bug] Android application build failure: Failed to assemble APK

[Amirth24]

Describe the bug

I just created a tauri project to play with it. I wanted to make an android application. I had no issues in developing the application the problem arises when it comes to building the apk. The issue here is this error arises at the end of the apk build process. Please help

Execution failed for task ':app:minifyUniversalReleaseWithR8'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.R8Task$R8Runnable
   > Compilation failed to complete, position: offset: 199, line: 7, column: 13, origin: /home/redloaded/Work/hello-tauri/src-tauri/gen/android/app/src/main/java/in/amirth24/tauriapp/generated/proguard-wry.pro

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.

BUILD FAILED in 4s
125 actionable tasks: 7 executed, 118 up-to-date
Failed to assemble APK: command ["/home/redloaded/Work/hello-tauri/src-tauri/gen/android/gradlew", "--project-dir", "/home/redloaded/Work/hello-tauri/src-tauri/gen/android"] exited with code 1: command ["/home/redloaded/Work/hello-tauri/src-tauri/gen/android/gradlew", "--project-dir", "/home/redloaded/Work/hello-tauri/src-tauri/gen/android"] exited with code 1
    Error [tauri_cli_node] Failed to assemble APK: command ["/home/redloaded/Work/hello-tauri/src-tauri/gen/android/gradlew", "--project-dir", "/home/redloaded/Work/hello-tauri/src-tauri/gen/android"] exited with code 1: command ["/home/redloaded/Work/hello-tauri/src-tauri/gen/android/gradlew", "--project-dir", "/home/redloaded/Work/hello-tauri/src-tauri/gen/android"] exited with code 1
 ELIFECYCLE  Command failed with exit code 1.

With verbose flag enabled, I was able to spot this

Caching disabled for task ':app:minifyUniversalReleaseWithR8' because:
  Build cache is disabled
Task ':app:minifyUniversalReleaseWithR8' is not up-to-date because:
  Task has failed previously.
R8 is a new Android code shrinker. If you experience any issues, please file a bug at
https://issuetracker.google.com, using 'Shrinker (R8)' as component name.
Current version is: 8.5.27 (build 9a5bef1f7f3530a8944fd7505683ce6b7c3a7a1f from go/r8bot (luci-r8-custom-ci-archive-0-5spf)).

file or directory '/home/redloaded/Work/hello-tauri/src-tauri/gen/android/app/build/intermediates/generated_proguard_file/universalRelease/mergeUniversalReleaseGeneratedProguardFiles/proguard.txt', not found
ERROR: /home/redloaded/Work/hello-tauri/src-tauri/gen/android/app/proguard-tauri.pro:3:13: R8: Class name expected at /home/redloaded/Work/hello-tauri/src-tauri/gen/android/app/proguard-tauri.pro:3:13
-keep class `in`.amirth24.tauriapp.TauriActivity {
            ^
ERROR: /home/redloaded/Work/hello-tauri/src-tauri/gen/android/app/src/main/java/in/amirth24/tauriapp/generated/proguard-wry.pro:7:13: R8: Class name expected at /home/redloaded/Work/hello-tauri/src-tauri/gen/android/app/src/main/java/in/amirth24/tauriapp/generated/proguard-wry.pro:7:13
-keep class `in`.amirth24.tauriapp.* {
            ^
Could not execute [report metric STATISTICS_COLLECT_METRICS_OVERHEAD]
Could not execute [report metric STATISTICS_COLLECT_METRICS_OVERHEAD]

Reproduction

1. Create a new tauri project with any ways I guess, I tried only with cargo and once again with pnpm.

   • pnpm create tauri-app
   • cd hello-tauri
   • pnpm install

2. Initialize the android support.

   • NDK_HOME=~/Android/Sdk/ndk/28.0.12433566 pnpm tauri android init
   • NDK_HOME=~/Android/Sdk/ndk/28.0.12433566 pnpm tauri android build

Expected behavior

No response

Full tauri info output

> [email protected] tauri /home/redloaded/Work/hello-tauri
> tauri "info"


[✔] Environment
    - OS: Pop!_OS 22.4.0 x86_64 (X64)
    ✔ webkit2gtk-4.1: 2.44.3
    ✔ rsvg2: 2.52.5
    ✔ rustc: 1.81.0 (eeb90cda1 2024-09-04)
    ✔ cargo: 1.81.0 (2dbb1af80 2024-08-20)
    ✔ rustup: 1.27.1 (54dd3d00f 2024-04-24)
    ✔ Rust toolchain: stable-x86_64-unknown-linux-gnu (default)
    - node: 20.18.0
    - pnpm: 9.12.1
    - npm: 10.8.2
    - bun: 1.1.10

[-] Packages
    - tauri 🦀: 2.0.2
    - tauri-build 🦀: 2.0.1
    - wry 🦀: 0.44.1
    - tao 🦀: 0.30.3
    - @tauri-apps/api : 2.0.2
    - @tauri-apps/cli : 2.0.2

[-] Plugins
    - tauri-plugin-shell 🦀: 2.0.1
    - @tauri-apps/plugin-shell : 2.0.0

[-] App
    - build-type: bundle
    - CSP: unset
    - frontendDist: ../dist
    - devUrl: http://localhost:1420/
    - framework: SolidJS
    - bundler: Vite

Stack trace

No response

Additional context

No response

[shenshouer]

I encountered the same issue. How can I resolve it? @lucasfernog @amrbashir ,

% ANDROID_HOME=/Users/sope/Library/Android/sdk NDK_HOME=/Users/sope/Library/Android/sdk/ndk/28.0.12674087 JAVA_HOME=/Applications/Android\ Studio.app/Contents/jbr/Contents/Home cargo tauri android dev

and 

% cargo tauri android dev 

output: 
BUILD FAILED in 4s
    Error Failed to assemble APK: command ["/Users/sope/workspaces/js/svelte/music-svelte/src-tauri/gen/android/gradlew", "--project-dir", "/Users/sope/workspaces/js/svelte/music-svelte/src-tauri/gen/android"] exited with code 1:

# But it's ok with pnpm command
% ANDROID_HOME=/Users/sope/Library/Android/sdk NDK_HOME=/Users/sope/Library/Android/sdk/ndk/28.0.12674087 JAVA_HOME=/Applications/Android\ Studio.app/Contents/jbr/Contents/Home pnpm tauri android dev

tauri info:

% cargo tauri info

[✔] Environment
    - OS: Mac OS 15.1.1 arm64 (X64)
    ✔ Xcode Command Line Tools: installed
    ✔ rustc: 1.84.0 (9fc6b4312 2025-01-07)
    ✔ cargo: 1.84.0 (66221abde 2024-11-19)
    ✔ rustup: 1.27.1 (54dd3d00f 2024-04-24)
    ✔ Rust toolchain: stable-aarch64-apple-darwin (environment override by RUSTUP_TOOLCHAIN)
    - node: 22.11.0
    - pnpm: 9.15.3
    - yarn: 1.22.21
    - npm: 10.9.0

[-] Packages
    - tauri 🦀: 2.2.1
    - tauri-build 🦀: 2.0.5
    - wry 🦀: 0.48.0
    - tao 🦀: 0.31.1
    - tauri-cli 🦀: 2.0.2
    - @tauri-apps/api : 2.2.0
    - @tauri-apps/cli : 2.0.2 (outdated, latest: 2.2.4)

[-] Plugins

[-] App
    - build-type: bundle
    - CSP: unset
    - frontendDist: ../build
    - devUrl: http://localhost:1420/
    - framework: Svelte
    - bundler: Vite