mattermost-mobile/android/build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext {
        buildToolsVersion = "28.0.3"
        minSdkVersion = 24
        compileSdkVersion = 28
        targetSdkVersion = 26
        supportLibVersion = "28.0.0"
    }
    repositories {
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.3.1'
        classpath 'com.google.gms:google-services:4.2.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

subprojects {
    afterEvaluate {
        android {
            compileSdkVersion rootProject.ext.compileSdkVersion
            buildToolsVersion rootProject.ext.buildToolsVersion
            defaultConfig {
                minSdkVersion rootProject.ext.minSdkVersion
                targetSdkVersion rootProject.ext.targetSdkVersion
            }
        }
    }
}

allprojects {
    repositories {
        google()
        mavenLocal()
        jcenter()
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
            url "$rootDir/../node_modules/react-native/android"
        }
        maven {
            // Local Maven repo containing AARs with JSC library built for Android
            url "$rootDir/../node_modules/jsc-android/dist"
        }
    }
}