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Findbugs android gradle plugin

Posted by: admin June 15, 2020 Leave a comment


I have an android project. I want to introduce findbugs in my project as a gradle plugin. I tried to edit the project’s build.gradle as below.

buildscript {
    repositories {
        maven { url 'https://maven.fabric.io/public' }
dependencies {
    classpath 'com.android.tools.build:gradle:1.0.0+'
    classpath 'io.fabric.tools:gradle:1.+'


apply plugin: "java"
apply plugin: "findbugs"
findbugs {
  toolVersion = "2.0.1"
  sourceSets = [sourceSets.main]
  ignoreFailures = false
  reportsDir = file("$project.buildDir/findbugsReports")
  effort = "max"
  reportLevel = "high"
  includeFilter =     file("$rootProject.projectDir/config/findbugs/includeFilter.xml")
  excludeFilter = file("$rootProject.projectDir/config/findbugs/excludeFilter.xml")

Is this plugin correct?
Does anything neeed to be added or removed?
Now what should I do to get the results of this findbugs check?
What gradle command should I use?

How to&Answers:

Just place this in your modules build.gradle.

apply plugin: 'findbugs'

task customFindbugs(type: FindBugs) {
    ignoreFailures = false
    effort = "max"
    reportLevel = "low"
    classes = files("$project.buildDir/intermediates/classes")

    // Use this only if you want exclude some errors
    excludeFilter = file("$rootProject.rootDir/config/findbugs/exclude.xml")

    source = fileTree('src/main/java/')
    classpath = files()

    reports {
        xml.enabled = false
        xml.withMessages = true
        html.enabled = !xml.isEnabled()
        xml.destination "$project.buildDir/outputs/findbugs/findbugs-output.xml"
        html.destination "$project.buildDir/outputs/findbugs/findbugs-output.html"

build.dependsOn customFindbugs

Then after changing directory to your project path from command line, use

./gradlew build

The error report will be in $project.buildDir/outputs/findbugs/findbugs-output.html


I modified a little bit Nevin Raj Victor’s answer.

This version generates a findbug task for each build variant, and (more importantly) it correctly creates dependencies on their respective compilation tasks. Indeed, findbugs requires the code to be compiled before it can be analyzed.

// findbug tasks for each variant
apply plugin: 'findbugs'

android.applicationVariants.all { variant ->
    task("findbugs${variant.name.capitalize()}", type: FindBugs) {
        description "Analyze ${variant.name} code with the findbugs tool"
        group "Verification"

        ignoreFailures = true
        effort = "default"
        reportLevel = "medium"

        classes = files("$project.buildDir/intermediates/classes/${variant.dirName}")
        excludeFilter = file("$rootProject.rootDir/findbugs/findbugs-filter.xml")
        source = variant.javaCompile.source
        classpath = variant.javaCompile.classpath

        reports {
            // Only one of HTML or XML can be turned on at the same time
            html.enabled = true
            xml.enabled = !html.enabled
            xml.withMessages = true

            html.destination = "$project.buildDir/outputs/findbugs/findbugs-${variant.name}-output.html"
            xml.destination = "$project.buildDir/outputs/findbugs/findbugs-${variant.name}-output.xml"

        dependsOn "compile${variant.name.capitalize()}JavaWithJavac"

After this, you can run

./gradlew findbugsDebug
./gradlew findbugsRelease

Or other findbugs tasks on different variants, depending on your configuration.


Please take a look at this project https://github.com/Piasy/AndroidCodeQualityConfig.

This project including lint, pmd, findbugs, checkstyle, jacoco code coverage.And support project with submodules.


I see some problems with your configuration:

  • instead of 2.0.1 version use latest 3.0.1
  • set reportLevel to low instead of high to report all the violations
  • for the first analysis you don’t need to configure any includeFilter or excludeFilter – these are only whitelist and blacklists of checks if you need some customization

To run analysis just invoke gradle findbugsMain. Results should be visible in the output.