repo_url="https://dl-ssl.google.com/android/repository"
#platforms_dir= "/path/to/android/platforms/"
platforms_dir="/home/serega/projects/android/android-sdk-linux_x86/platforms"
#zip_storage_dir="/path/where/you/going/to/store/zips"
zip_storage_dir="/home/serega/projects/android/android-sdk-linux_x86/zip"

if [ ! -d $zip_storage_dir ]; then mkdir $zip_storage_dir; fi

files_list="android-1.1_r1-linux.zip
android-1.5_r04-linux.zip
android-1.6_r03-linux.zip
android-2.0_r01-linux.zip
android-2.0.1_r01-linux.zip
android-2.1_r02-linux.zip
android-2.2_r02-linux.zip
samples-2.1_r01-linux.zip
samples-2.2_r01-linux.zip
samples-2.3_r01-linux.zip
android-2.3.1_r02-linux.zip
android-2.3.3_r01-linux.zip
samples-2.3.3_r01-linux.zip
android-3.0_r01-linux.zip
platform-tools_r03-linux.zip
tools_r10-linux.zip
samples-3.0_r01-linux.zip
docs-3.0_r01-linux.zip"


for i in $files_list;
do
    cd $zip_storage_dir
    if [ ! -e $i ]; then
        wget $repo_url/$i;
        mv $i $platforms_dir;
        cd $platforms_dir
        unzip $i;
        mv $i $zip_storage_dir
    fi
done