Script to select one connected device or emulator when running adb

android-select-device

#! /bin/bash
#=====================================================================
# Selects an android device
# Copyright (C) 2012-2022 Diego Torres Milano. All rights reserved.
#
# The simplest way to invoke this script is creating a function like
# this one in your shell startup file:
#
# ```
# adb ()
# {
#    command adb $(android-select-device "$@") "$@"
# }
#
# ```
#
# See:
#    - http://dtmilano.blogspot.ca/2013/01/android-select-device.html
#    - http://dtmilano.blogspot.ca/2012/03/selecting-adb-device.html
# for details on usage.
#=====================================================================

get_adb_devices() {
    command adb $ADB_SERVER devices $LONG 2>&1 | tail -n +2 | sed '/^$/d'
}

git_pull() {
    [[ "$UNAME" == 'Linux' ]] && OPT=-e
    ASD=$(readlink $OPT $0)
    if [[ -n "$ASD" ]]
    then
        DIR=$(dirname $ASD)
        if [[ -n "$DIR" && -d "$DIR/.git" ]]
        then
            (cd $DIR && git pull --no-rebase)
        fi
    fi
}

PROGNAME=$(basename $0)
VERSION="3.6.0"
UNAME=$(uname)
DEVICE_OPT=
LONG=
ADB_SERVER=

git_pull > /dev/null

for ((i=1; i<=$#; ++i))
do
    opt="${@:i:1}"
    case "$opt" in
        -d|-e|-s|-t)
            DEVICE_OPT=$opt
            ;;
        
        -l|--long)
            LONG=-l
            ;;

        start-server|kill-server|connect|pair|devices|-help)
            exit 0
            ;;

        forward)
            if [[ "${@:i+1:1}" == '--list' ]]
            then
                exit 0
            fi
            ;;

        -V|--version)
            echo "$PROGNAME version $VERSION"
            exit 0
            ;;
    esac
done
[ -n "$DEVICE_OPT" ] && exit 0
DEV=$(get_adb_devices)
if [ -z "$DEV" ]
then
    echo "$PROGNAME: ERROR: There's no locally connected devices." >&2
    read -p "Do you want to connect to a remote adb server? [Y/n]: " REPLY
    case "$REPLY" in
        n|N)
            exit 1
            ;;

        y|Y|"")
            read -p "ADB server IP: " IP
            ADB_SERVER="-H $IP"
            DEV=$(get_adb_devices)
            ;;
    esac
elif grep -q 'daemon started successfully' <<<"$DEV"
then
    # try again
    DEV=$(get_adb_devices)
fi
N=$(wc -l <<<"$DEV" | sed 's/ //g')

case "$N" in
1)
    # only one device detected
    D=$DEV
    ;;

*)
    # more than one device detected
    OLDIFS=$IFS
    IFS="
"
    PS3="Select the device to use, <Q> to quit: "
    select D in $DEV
    do
        [ "$REPLY" = 'q' -o "$REPLY" = 'Q' ] && exit 2
        [ -n "$D" ] && break
    done < /dev/tty

    IFS=$OLDIFS
    ;;
esac

if [ -z "$D" ]
then
    echo "$PROGNAME: ERROR: target device couldn't be determined" >&2
    exit 1
fi

# this didn't work on Darwin
# echo "-s ${D%% *}"
printf -- '-s %s\n' "$(echo ${D} | sed 's/ .*$//')"

Sorry, but how to find the adb ip? I tried serval ip addresses like 127.0.0.1 and the address from 'adb shell ip -f inet addr show wlan0'. but none of these work. Thanks a lot

If the device is connected through adb over wifi as described at https://developer.android.com/studio/command-line/adb#connect-to-a-device-over-wi-fi-android-11+, it will show up in the list with its IP or hostname.
If this is not the case then you should have to review your settings and follow the steps provided in the page.