android屏幕适配，自动生成不同的dimens.xml详解

package com.example.qunzhang.testdemo; 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; import java.text.DecimalFormat; public class DimenTool { public static void gen() { //以此文件夹下的dimens.xml文件内容为初始值参照 File file = new File("./app/src/main/res/values/dimens.xml"); BufferedReader reader = null; StringBuilder sw240 = new StringBuilder(); StringBuilder sw320 = new StringBuilder(); StringBuilder sw360 = new StringBuilder(); StringBuilder sw480 = new StringBuilder(); StringBuilder sw600 = new StringBuilder(); StringBuilder sw720 = new StringBuilder(); StringBuilder sw800 = new StringBuilder(); StringBuilder sw820 = 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); //截取<dimen></dimen>标签内的内容，从>右括号开始，到左括号减2，取得配置的数字 Double num = Double.parseDouble (tempString.substring(tempString.indexOf(">") + 1, tempString.indexOf("</dimen>") - 2)); //根据不同的尺寸，计算新的值，拼接新的字符串，并且结尾处换行。 sw240.append(start).append(getNum(num * 0.75)).append(end).append("\r\n"); sw320.append(start).append(getNum(num * 1)).append(end).append("\r\n"); sw360.append(start).append(getNum(num * 1.125)).append(end).append("\r\n"); sw480.append(start).append(getNum(num * 1.5)).append(end).append("\r\n"); sw600.append(start).append(getNum(num * 1.875)).append(end).append("\r\n"); sw720.append(start).append(getNum(num * 2.25)).append(end).append("\r\n"); sw800.append(start).append(getNum(num * 2.5)).append(end).append("\r\n"); sw820.append(start).append(getNum(num * 2.562)).append(end).append("\r\n"); } else { sw240.append(tempString).append(""); sw320.append(tempString).append(""); sw360.append(tempString).append(""); sw480.append(tempString).append(""); sw600.append(tempString).append(""); sw720.append(tempString).append(""); sw800.append(tempString).append(""); sw820.append(tempString).append(""); } line++; } reader.close(); System.out.println("<!-- sw240 -->"); System.out.println(sw240); System.out.println("<!-- sw320 -->"); System.out.println(sw320); System.out.println("<!-- sw360 -->"); System.out.println(sw360); 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 sw240file = "./app/src/main/res/values-sw240dp/dimens.xml"; String sw320file = "./app/src/main/res/values-sw320dp/dimens.xml"; String sw360file = "./app/src/main/res/values-sw360dp/dimens.xml"; String sw480file = "./app/src/main/res/values-sw480dp/dimens.xml"; String sw600file = "./app/src/main/res/values-sw600dp/dimens.xml"; String sw720file = "./app/src/main/res/values-sw720dp/dimens.xml"; String sw800file = "./app/src/main/res/values-sw800dp/dimens.xml"; String sw820file = "./app/src/main/res/values-sw820dp/dimens.xml"; //将新的内容，写入到指定的文件中去 writeFile(sw240file, sw240.toString()); writeFile(sw320file, sw320.toString()); writeFile(sw360file, sw360.toString()); writeFile(sw480file, sw480.toString()); writeFile(sw600file, sw600.toString()); writeFile(sw720file, sw720.toString()); writeFile(sw800file, sw800.toString()); writeFile(sw820file, sw820.toString()); } catch (IOException e) { e.printStackTrace(); } finally { if (reader != null) { try { reader.close(); } catch (IOException e1) { e1.printStackTrace(); } } } } private static double getNum(double num){ DecimalFormat df = new DecimalFormat("#####0.0"); return Double.parseDouble(df.format(num)); } /** * 写入方法 */ 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(); } }