自动生成Android不同分辨率下的图片

Android屏幕分辨率适配的图标处理比较麻烦，让UI做不同尺寸的图片也挺浪费时间的，并且容易出错，于是用Python写了个工具自动化处理图片，UI只需要做好1080*1920分辨率下的图片就可以了，其它分辨率的图片自动生成。

import os.path
import sys
from PIL import Image

"""
自动生成不同分辨率下的App图片
UI设计1080*1920分辨率图片，放在drawable-xxhdpi目录下，自动生成其它的分辨率图片
"""

__author__ = [‘"Xitao":<[email protected]>‘]

def image_resize(img_file, target, percent):
    """resize image and save to target path
    :param img_file: image file path
    :param target: save path
    :param percent: resize percent
    :return:
    """
    img = Image.open(img_file)
    print(img.size)
    width, height = img.size
    target_img = img.resize((int(width * percent), int(height * percent)), Image.ANTIALIAS)
    target_img.save(target)
    img.close()
    target_img.close()
    print(" save target image to " + target)

def path_resize(src, target, percent):
    if not os.path.isdir(src):
        print(src + " must be a dir")
        return -1

    os.chdir(src)
    cwd = os.getcwd()
    dirs = os.listdir(cwd)
    for file_name in dirs:
        print file_name
        if file_name.endswith(‘.9.png‘):
            continue

        src_file = os.path.join(cwd, file_name)

        if not os.path.exists(target):
            os.mkdir(target)
        image_resize(src_file, target + ‘/‘ + file_name, percent)

def android(res_dir):
    xxhdpi_path = res_dir + "/drawable-xxhdpi/"

    if not os.path.isdir(xxhdpi_path):
        print("xxhdpi_path must be a dir")
        return -1

    path_resize(xxhdpi_path, res_dir + ‘/drawable-xhdpi‘, 0.667)
    path_resize(xxhdpi_path, res_dir + ‘/drawable-hdpi‘, 0.444)
    path_resize(xxhdpi_path, res_dir + ‘/drawable-mdpi‘, 0.296)

if __name__ == "__main__":
    print(‘please input your androd res dir path‘)
    print(sys.argv)
    if sys.argv[1]:
        android(sys.argv[1])