get_android_service_call_numbers.sh

#!/bin/bash

ADBShell () { adb ${2+-s }$2 shell "$1" | tr -d '\r'
}

GetAndroidVersion () {
    local ALL_TAGS=$(wget -qO - "$GOOGLE_SOURCE/$REPO/+refs/tags/?format=text" | \
    tr -d '^{}' | cut -d/ -f3 | sort -u | grep -vE -- '-(cts|sdk)-' | grep -v "_r0")
    TAG=${1:-$(ADBShell 'getprop ro.build.version.release')}
    echo -e "ANDROID_SERIAL=$ANDROID_SERIAL\nro.build.version.release=$TAG" 1>&2
    TAG=$(echo "$ALL_TAGS" | grep -- "android-${TAG//./\.}" | head -n 1)
    echo -e "TAG=$TAG" 1>&2
    [ "-$TAG" != "-"  ] && return 0
    echo -e "TAG not valid!\n\nList of valid tags: "$ALL_TAGS 1>&2
    exit 1
}

GetServicePackageName () {
    SERVICE_PACKAGE=$(ADBShell 'service list' | grep "\s$1: \[" | head -n 1 | tr '[]' '""' | cut -d\" -f2)
    echo -e "SERVICE=$1\nSERVICE_PACKAGE=$SERVICE_PACKAGE" 1>&2
}

GetGoogleSourceFile () {
    #echo -e "\t\E[31mdownloading\E[0m $GOOGLE_SOURCE/$REPO/+/$1/$2" 1>&2
    [ "-$1" == "-" ] && return 1
    wget -qO - "$GOOGLE_SOURCE/$REPO/+/$1/$2?format=text" | base64 -d
}

GetAllServices () {
    ALL_SERVICES=$(GetGoogleSourceFile "$TAG" "Android.mk" | tr -d ' \\\t' | grep "\.aidl$" | \
    sort -u | grep -v "^gen:")
}

ParseServiceAIDL () {
    GetGoogleSourceFile "$TAG" $(echo "$ALL_SERVICES" | grep "${SERVICE_PACKAGE//.//}\.aidl$" | head -n 1) | \
    gcc -P -E - | tr '{};\n\r' '\n\n\n  ' | grep -v ^$ | sed -e '1,/interface\s/ d' | cat -n
}

AbortIfExecutableMissing () {
    BIN=($@)
    MISSINGBIN=$(for B in ${BIN[@]}; do [ "$(which $B 2>/dev/null)-" == "-" ] && echo $B; done)
    [ "${MISSINGBIN}-" == "-" ] && return 0
    echo -e "Can't find the following executables: "$MISSINGBIN
    exit 1
}

AbortIfExecutableMissing "adb wget gcc tr sed awk cut grep basename dirname head base64"

GOOGLE_SOURCE="https://android.googlesource.com"
REPO="platform/frameworks/base"

GetAndroidVersion
GetAllServices
GetServicePackageName $1

ParseServiceAIDL

exit 0

Based on your guys' work, I wrote a small utility to make it easier to find and call service methods etc: https://github.com/T-vK/android-svc

Now you can simply do

android-svc call 'android.media.IAudioService.setMasterMute(false, 0, "com.termux", 0);'
#or
android-svc call 'audio.setMasterMute(false, 0, "com.termux", 0);'

instead of

service call audio 11 i32 0 i32 0 s16 'com.termux' i32 0

Works both from a Linux host over adb as well as on an Android device directly. I can't verify if it works from a Mac OS machine though.

Just FYI, you (that includes all forks) have what I would call a critical bug in your ParseServiceAIDL function. That caused the incorrect method index to be returned in some cases. I have fixed that in my GetMethodIndex. Feel free to copy whatever you need.

In Android 9 you can parse Android.bp instead of Android.mk for the aidl sources. Starting with Android 11 you have to actually search through the entire directory tree to find them all. I got that working in android-svc here:

https://github.com/T-vK/android-svc/blob/7c9d9c590e7ecbe8170086f3aafde54fe5ffd1ce/android-svc-lib.sh#L260