自动生成Android屏幕适配的dimens.xml

来源：互联网发布：仿真分析软件编辑：程序博客网时间：2024/05/12 06:15

最近团队再做Android App的屏幕适配，按照官方的办法是layout文件引用dimen变量，变量放在多个不同分辨率下的dimens.xml文件中，分别放在不同的目录下，

 ./app/src/main/res/values-sw480dp-land/dimens.xml ./app/src/main/res/values-sw600dp-land/dimens.xml ./app/src/main/res/values-sw720dp-land/dimens.xml ./app/src/main/res/values-sw800dp-land/dimens.xml ./app/src/main/res/values-w820dp/dimens.xml

人工处理这些dimens.xml，感觉比较麻烦，就是个体力活，于是做了个工具类按比例自动化生成dimens.xml文件，效率瞬间提高了很多倍，如果需要特殊定义尺寸，放到另一个xml文件里面就行了。

values/dimens.xml 文件示例

<resources>    <!-- Default screen margins, per the Android Design guidelines. -->    <dimen name="activity_horizontal_margin">14dp</dimen>    <dimen name="activity_vertical_margin">14dp</dimen>    <dimen name="action_bar_height">50dp</dimen>    <dimen name="tab_height">81dp</dimen>    <dimen name="content_margin">18dp</dimen>    <dimen name="list_title_height">63dp</dimen>    <dimen name="report_table_header_height">54dp</dimen>    <dimen name="report_category_height">54dp</dimen>    <dimen name="fab_size_normal">72dp</dimen>    <dimen name="fab_margin">14dp</dimen>

工具类代码，直接运行即可

import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.io.PrintWriter;/** * 根据values/dimens.xml, 自动计算比例并生成不同分辨率的dimens.xml * 注意用dp和sp，不要用dip，否则生成可能会出错；xml值不要有空格 * Created by zhangxitao on 15/9/22. */public class DimenTool {    public static void gen() {        File file = new File("./app/src/main/res/values/dimens.xml");        BufferedReader reader = null;        StringBuilder sw480 = new StringBuilder();        StringBuilder sw600 = new StringBuilder();        StringBuilder sw720 = new StringBuilder();        StringBuilder sw800 = new StringBuilder();        StringBuilder w820 = new StringBuilder();        try {            System.out.println("生成不同分辨率：");            reader = new BufferedReader(new FileReader(file));            String tempString;            int line = 1;            // 一次读入一行，直到读入null为文件结束            while ((tempString = reader.readLine()) != null) {                if (tempString.contains("</dimen>")) {                    //tempString = tempString.replaceAll(" ", "");                    String start = tempString.substring(0, tempString.indexOf(">") + 1);                    String end = tempString.substring(tempString.lastIndexOf("<") - 2);                    int num = Integer.valueOf(tempString.substring(tempString.indexOf(">") + 1, tempString.indexOf("</dimen>") - 2));                    sw480.append(start).append((int) Math.round(num * 0.6)).append(end).append("\n");                    sw600.append(start).append((int) Math.round(num * 0.75)).append(end).append("\n");                    sw720.append(start).append((int) Math.round(num * 0.9)).append(end).append("\n");                    sw800.append(tempString).append("\n");                    w820.append(tempString).append("\n");                } else {                    sw480.append(tempString).append("\n");                    sw600.append(tempString).append("\n");                    sw720.append(tempString).append("\n");                    sw800.append(tempString).append("\n");                    w820.append(tempString).append("\n");                }                line++;            }            reader.close();            System.out.println("<!--  sw480 -->");            System.out.println(sw480);            System.out.println("<!--  sw600 -->");            System.out.println(sw600);            System.out.println("<!--  sw720 -->");            System.out.println(sw720);            System.out.println("<!--  sw800 -->");            System.out.println(sw800);            String sw480file = "./app/src/main/res/values-sw480dp-land/dimens.xml";            String sw600file = "./app/src/main/res/values-sw600dp-land/dimens.xml";            String sw720file = "./app/src/main/res/values-sw720dp-land/dimens.xml";            String sw800file = "./app/src/main/res/values-sw800dp-land/dimens.xml";            String w820file = "./app/src/main/res/values-w820dp/dimens.xml";            writeFile(sw480file, sw480.toString());            writeFile(sw600file, sw600.toString());            writeFile(sw720file, sw720.toString());            writeFile(sw800file, sw800.toString());            writeFile(w820file, w820.toString());        } catch (IOException e) {            e.printStackTrace();        } finally {            if (reader != null) {                try {                    reader.close();                } catch (IOException e1) {                    e1.printStackTrace();                }            }        }    }    public static void writeFile(String file, String text) {        PrintWriter out = null;        try {            out = new PrintWriter(new BufferedWriter(new FileWriter(file)));            out.println(text);        } catch (IOException e) {            e.printStackTrace();        }        out.close();    }    public static void main(String[] args) {        gen();    }}

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