Kadb is a Kotlin Multiplatform ADB client library for talking directly to adbd.

It is intended for apps and tools that need shell, sync, install, pairing, or port forwarding without embedding the full adb CLI or server stack.

Platform Notes · mDNS Discovery · Host Identity · Docs Index

• Direct Kotlin API for adbd
• Android and JVM targets
• Wireless pairing, shell, file transfer, install, and TCP forwarding
• AOSP-aligned host behavior where practical

Kadb is not a full adb server replacement. USB discovery, transport brokering, and server-style device tracking are out of scope.

dependencies {
    implementation("com.flyfishxu:kadb:2.1.3")
}

Optional mDNS discovery:

dependencies {
    implementation("com.flyfishxu:kadb-mdns:2.1.3")
}

Connect to an existing device transport:

Kadb.create("127.0.0.1", 5555).use { kadb ->
    val response = kadb.shell("echo hello")
    check(response.exitCode == 0)
    check(response.output == "hello\n")
}

Pair with a new Android 11+ device:

Kadb.pair("10.0.0.175", 37755, "643102")

Discover wireless debugging endpoints with the optional mDNS artifact:

val mdns = KadbMdnsAndroid(context)
mdns.start()

val mdns = KadbMdnsJvm()
mdns.start()

Discovered endpoints can be passed to Kadb.create(host, port) or Kadb.pair(host, port, code).

Install an APK:

Kadb.create("127.0.0.1", 5555).use { kadb ->
    kadb.install(apkFile)
}

Push a file:

Kadb.create("127.0.0.1", 5555).use { kadb ->
    kadb.push(localFile, "/data/local/tmp/remote.txt")
}

Forward a TCP port:

Kadb.create("127.0.0.1", 5555).tcpForward(
    hostPort = 7001,
    targetPort = 7001
).use {
    // localhost:7001 now forwards to the device's port 7001
}

• Android target support starts at minSdk 23
• Basic connect / shell / sync / install flows do not require the full adb binary
• Pairing has stricter requirements than ordinary client operations
• JVM pairing requires conscrypt-openjdk-uber
• Android 6 to 8 usually need a custom Conscrypt dependency for pairing

Example JVM pairing dependency:

dependencies {
    implementation("com.flyfishxu:kadb:2.1.3")
    implementation("org.conscrypt:conscrypt-openjdk-uber:2.5.2")
}

More detail: docs/platform.md

• Kadb is a direct client library, not a full adb server
• USB transport discovery still requires external tooling

• Documentation Index
• Platform Notes
• mDNS Discovery
• KadbCert

• Dadb
• libadb-android
• spake2-java