android-generator.sh

#!/bin/sh
###################################
#
# App Icon Generator v0.0.2
#
# Andrey A. Ugolnik
# https://www.ugolnik.info
# andrey@ugolnik.info
#
###################################

SRC_ICON="$1"
SRC_BANNER="$2"
DST_PATH="$3"

info() {
    local green="\033[1;32m"
    local normal="\033[0m"
    echo "[${green}INFO${normal}] $1"
}

error() {
    local red="\033[1;31m"
    local normal="\033[0m"
    echo "[${red}ERROR${normal}] $1"
}

usage() {
    cat <<EOF
USAGE:
    $0 SourceIcon SourceBanner DestPath

DESCRIPTION:
    This script aim to generate Android TV app icons easier and simply.

    SourceIcon   - The source png Icon. Preferably above 1024x1024.
    SourceBanner - The source png Banner. Preferably above 1280x720.
    DestPath     - The destination Path where the icons and banners generate to.

    This script is depend on ImageMagick. So you must install ImageMagick first
    You can use 'brew install ImageMagick' to install it

EXAMPLE:
    $0 Banner.png Icon.png Output/
EOF
}

# Check ImageMagick
command -v magick >/dev/null 2>&1 || {
    error >&2 "The ImageMagick is not installed. Please use brew to install it first."
    exit -1
}

# Check param
if [ $# != 3 ]; then
    usage
    exit -1
fi

makeIconTV() {
    local LOUTPATH="$DST_PATH/$1"
    local LSIZE="$2"

    # make destination path
    mkdir -p "$LOUTPATH"

    # make rect icon
    magick "$SRC_ICON" -resize $LSIZE! "$LOUTPATH/ic_launcher.png"
}

makeIconTV "mipmap-mdpi" "80x80"
makeIconTV "mipmap-hdpi" "120x120"
makeIconTV "mipmap-xhdpi" "160x160"
makeIconTV "mipmap-xxhdpi" "240x240"
makeIconTV "mipmap-xxxhdpi" "320x320"
info 'Android TV icons ready.'

makeBannerTV() {
    local LOUTPATH="$DST_PATH/$1"
    local LSIZE="$2"

    # make destination path
    mkdir -p "$LOUTPATH"

    # make rect icon
    magick "$SRC_BANNER" -resize $LSIZE! "$LOUTPATH/ic_banner.png"
}

makeBannerTV "mipmap-mdpi" "160x90"
makeBannerTV "mipmap-hdpi" "240x135"
makeBannerTV "mipmap-xhdpi" "320x180"
makeBannerTV "mipmap-xxhdpi" "480x270"
makeBannerTV "mipmap-xxxhdpi" "640x360"
info 'Android TV banners ready.'

makeIcon() {
    local LOUTPATH="$DST_PATH/$1"
    local LSIZE="$2"

    # make destination path
    mkdir -p "$LOUTPATH"

    # make rect icon
    magick "$SRC_ICON" -resize $LSIZE! "$LOUTPATH/ic_launcher.png"

    # make rect foreground icon
    if [ $# -ge 4 ]; then
        local FSIZE="$3"
        local ESIZE="$4"
        magick "$SRC_ICON" -resize $FSIZE^ -gravity center -background none -extent $ESIZE "$LOUTPATH/ic_launcher_foreground.png"
    fi

    # make rounded icon
    magick "$LOUTPATH/ic_launcher.png" \( +clone -threshold 101% -fill white -draw 'circle %[fx:int(w/2)],%[fx:int(h/2)] %[fx:int(w/2)],1' \) -channel-fx '| gray=>alpha' "$LOUTPATH/ic_launcher_round.png"
}

makeAnyDpi() {
    local XMLPATH="$1"
    local ANYDPIPATH="$DST_PATH/mipmap-anydpi-v26"

    # make destination path
    mkdir -p "$ANYDPIPATH"

    # write adaptive icon xml
    cat <<EOF >"$ANYDPIPATH/$XMLPATH.xml"
<?xml version="1.0" encoding="utf-8"?>
<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
    <background android:drawable="@color/ic_launcher_background"/>
    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
</adaptive-icon>
EOF
}

makeBackground() {
    local XMLPATH="$1"
    local ANYDPIPATH="$DST_PATH/colors"

    # make destination path
    mkdir -p "$ANYDPIPATH"

    # write adaptive icon xml
    cat <<EOF >"$ANYDPIPATH/$XMLPATH.xml"
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="ic_launcher_background">#000000</color>
</resources>
EOF
}

makeIcon "mipmap-mdpi" "48x48" "66x66" "108x108"
makeIcon "mipmap-hdpi" "72x72" "99x99" "162x162"
makeIcon "mipmap-xhdpi" "96x96" "132x132" "216x216"
makeIcon "mipmap-xxhdpi" "144x144" "198x198" "324x324"
makeIcon "mipmap-xxxhdpi" "192x192" "264x264" "432x432"

makeAnyDpi "ic_launcher"
makeAnyDpi "ic_launcher_round"
makeBackground "ic_launcher_background"

info 'Android icons ready.'

cat <<EOF

Add the following lines to your AndroidManifest.xml inside the <application> tag:
    android:icon="@mipmap/ic_launcher"
    android:roundIcon="@mipmap/ic_launcher_round"

EOF