android 屏幕适配1 ——dimens.xml的适配
1.如果是才开始做项目，已经有设计图：720*1280
1).默认values文件夹：1dp=1px
values/dimens_x.xml：
name: x1~x720 value:1px~720px
<dimen name="x1">1.0px</dimen>
values/dimens_y.xml
name: y1~y1280 value:1px~1280px
<dimen name="y1">1.0px</dimen>
2).720*1280像素对应的values-w720dp文件: 1dp=2px
values-w720dp/dimens_x.xml:
name: x1~x720 value:2px~1440px
<dimen name="x1">2.0px</dimen>
values-w720dp/dimens_y.xml
name: y1~y1280 value:2px~2560px
<dimen name="y1">2.0px</dimen>
2).1080*1920像素对应的values-w1080dp文件: 【以720*1280位基准数作倍数换算】
values-w1080dp/dimens_x.xml:
name: x1~x720 value:3px~1080px Width:1080 baseW:720
<dimen name="x1">3.0px</dimen> 倍数换算：倍数=Width/baseW=1080/720=1.5 value=1.5*2px=3.0px
values-w1080dp/dimens_y.xml：
name: y1~y1280 value:3px~3840px Height:1920 baseH:1280
<dimen name="y1">3px</dimen> 倍数换算：倍数=Height/baseH=1920/1280=1.5 value=1.5*2px=3.0px
备注：
1.倍数即屏幕像素密度：例子中用的是常用的手机像素密度，但市面上手机像素密度参差不齐，跟你测试的实际手机像素密度可能不一样，但一般用常用的像素密度来换算
2.若以dp为单位
1).values下的文件，如下：
values/dimens_x.xml
name: x1~x720 value:1.0dp~720.0dp
<dimen name="x1">1.0dp</dimen>
......
<dimen name="x720">720.0dp</dimen>
values/dimens_y.xml
name:y1~y1280 value:1dp~1280.0dp
<dimen name="y1">1dp</dimen>
......
<dimen name="y1280">1280.0dp</dimen>
2).values-w720dp下，如下：
values-w720dp/dimens_x.xml
name: x1~x720 value:0.5dp~360.0dp
<dimen name="x1">0.5dp</dimen>
......
<dimen name="x720">360.0dp</dimen>
values-720dp/dimens_y.xml
name:y1~y1280 value:0.5dp~640.0dp
<dimen name="y1">0.5dp</dimen>
......
<dimen name="y1280">640.0dp</dimen>
2.项目完成之后，则将values下面的dimens.xml 文件
按照不同分辩率的手机生成对应倍数的不同像素的dimens.xml文件
eg：以720*1280为例子
values/dimens.xml ：1dp=1px
<dimen name="x1">1dp</dimen>
values-w720dp/dimens.xml ： 【720*1280】
<dimen name="x1">0.5dp</dimen> 倍数换算： 1dp=2px 720px=360dp 倍数=360/720=0.5
values-w1080dp/dimens.xml ： 【1080*1920】
<dimen name="x1">0.75dp</dimen> 倍数换算【以720作基准】：1080/720*0.5=0.75dp
附：自动生成dimens.xml的代码：
1.项目才开始，生成竖屏的代码
package com.charlie.volley.utils; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.PrintWriter; /** * 屏幕适配，自动生成dimens.xml * @author Charlie * */ public class GenerateValueFiles { private int baseW; private int baseH; private String dirStr = "./res"; private final static String WTemplate = "<dimen name=\"x{0}\">{1}dp</dimen>\n"; private final static String HTemplate = "<dimen name=\"y{0}\">{1}dp</dimen>\n"; /** * {0}-HEIGHT */ private final static String VALUE_TEMPLATE = "values-{0}x{1}"; private final static String VALUE_TEMPLATE1 = "values"; private static final String SUPPORT_DIMESION = "720,1280;1536,2048;1080,1920"; /** * 单位为px:倍数与屏幕分辨率有关，2.0f对应屏幕像素为：720*1280，生成的文件对应放在values-w720dp下面 * 单位为dp：multiple=0.5f，对应屏幕像素为：720*1280，生成的文件对应放在values-w720dp下面 */ private final static float multiple=0.5f; private String supportStr = SUPPORT_DIMESION; public GenerateValueFiles(int baseX, int baseY, String supportStr) { this.baseW = baseX; this.baseH = baseY; if (!this.supportStr.contains(baseX + "," + baseY)) { this.supportStr += baseX + "," + baseY + ";"; } this.supportStr += validateInput(supportStr); System.out.println(supportStr); File dir = new File(dirStr); if (!dir.exists()) { dir.mkdir(); } System.out.println(dir.getAbsoluteFile()); } /** * @param supportStr * w,h_...w,h; * @return */ private String validateInput(String supportStr) { StringBuffer sb = new StringBuffer(); String[] vals = supportStr.split("_"); int w = -1; int h = -1; String[] wh; for (String val : vals) { try { if (val == null || val.trim().length() == 0) continue; wh = val.split(","); w = Integer.parseInt(wh[0]); h = Integer.parseInt(wh[1]); } catch (Exception e) { System.out.println("skip invalidate params : w,h = " + val); continue; } sb.append(w + "," + h + ";"); } return sb.toString(); } public void generate() { String[] vals = supportStr.split(";"); for (String val : vals) { String[] wh = val.split(","); if(Integer.parseInt(wh[0])==baseW){ float multiple=1.0f; generateBaseXmlFile(Integer.parseInt(wh[0]), Integer.parseInt(wh[1]),multiple); } generateXmlFile(Integer.parseInt(wh[0]), Integer.parseInt(wh[1])); } } private void generateBaseXmlFile(int w, int h,float multiple) { StringBuffer sbForWidth = new StringBuffer(); sbForWidth.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); sbForWidth.append("<resources>\n"); float cellw = w * multiple / baseW; System.out.println("width : " + w + "," + baseW + "," + cellw); for (int i = 1; i <= baseW; i++) { sbForWidth.append("\t"+WTemplate.replace("{0}", i + "").replace("{1}", change(cellw * i) + "")); } // sbForWidth.append("\t"+WTemplate.replace("{0}", baseW + "").replace("{1}", // w + "")); sbForWidth.append("</resources>"); StringBuffer sbForHeight = new StringBuffer(); sbForHeight.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); sbForHeight.append("<resources>\n"); float cellh = h *multiple/ baseH; System.out.println("height : "+ h + "," + baseH + "," + cellh); for (int i = 1; i <= baseH; i++) { sbForHeight.append("\t"+HTemplate.replace("{0}", i + "").replace("{1}", change(cellh * i) + "")); } // sbForHeight.append("\t"+HTemplate.replace("{0}", baseH + "").replace("{1}", // h + "")); sbForHeight.append("</resources>"); File fileDir = new File(dirStr + File.separator + VALUE_TEMPLATE1); fileDir.mkdir(); File layxFile = new File(fileDir.getAbsolutePath(), "ch_dimens_x.xml"); File layyFile = new File(fileDir.getAbsolutePath(), "ch_dimens_y.xml"); System.out.println(fileDir.toString()); try { PrintWriter pw = new PrintWriter(new FileOutputStream(layxFile)); pw.print(sbForWidth.toString()); pw.close(); pw = new PrintWriter(new FileOutputStream(layyFile)); pw.print(sbForHeight.toString()); pw.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } } private void generateXmlFile(int w, int h) { StringBuffer sbForWidth = new StringBuffer(); sbForWidth.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); sbForWidth.append("<resources>\n"); float cellw = w * multiple / baseW; System.out.println("width : " + w + "," + baseW + "," + cellw); for (int i = 1; i <= baseW; i++) { sbForWidth.append("\t"+WTemplate.replace("{0}", i + "").replace("{1}", change(cellw * i) + "")); } // sbForWidth.append("\t"+WTemplate.replace("{0}", baseW + "").replace("{1}", // w + "")); sbForWidth.append("</resources>"); StringBuffer sbForHeight = new StringBuffer(); sbForHeight.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); sbForHeight.append("<resources>\n"); float cellh = h *multiple/ baseH; System.out.println("height : "+ h + "," + baseH + "," + cellh); for (int i = 1; i <= baseH; i++) { sbForHeight.append("\t"+HTemplate.replace("{0}", i + "").replace("{1}", change(cellh * i) + "")); } // sbForHeight.append("\t"+HTemplate.replace("{0}", baseH + "").replace("{1}", // h + "")); sbForHeight.append("</resources>"); File fileDir = new File(dirStr + File.separator + VALUE_TEMPLATE.replace("{0}", h + "")// .replace("{1}", w + "")); fileDir.mkdir(); File layxFile = new File(fileDir.getAbsolutePath(), "ch_dimens_x.xml"); File layyFile = new File(fileDir.getAbsolutePath(), "ch_dimens_y.xml"); try { PrintWriter pw = new PrintWriter(new FileOutputStream(layxFile)); pw.print(sbForWidth.toString()); pw.close(); pw = new PrintWriter(new FileOutputStream(layyFile)); pw.print(sbForHeight.toString()); pw.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } } public static float change(float a) { int temp = (int) (a * 100); return temp / 100f; } public static void main(String[] args) { int baseW = 720; int baseH = 1280; String addition = ""; try { if (args.length >= 3) { baseW = Integer.parseInt(args[0]); baseH = Integer.parseInt(args[1]); addition = args[2]; } else if (args.length >= 2) { baseW = Integer.parseInt(args[0]); baseH = Integer.parseInt(args[1]); } else if (args.length >= 1) { addition = args[0]; } } catch (NumberFormatException e) { System.err .println("right input params : java -jar xxx.jar width height w,h_w,h_..._w,h;"); e.printStackTrace(); System.exit(-1); } new GenerateValueFiles(baseW, baseH, addition).generate(); } }
2.项目才开始，生成横屏的代码
package com.charlie.volley.utils; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.PrintWriter; /** * 屏幕适配，自动生成dimens.xml * @author Charlie * */ public class GenerateValueFiles_land { private int baseW; private int baseH; private String dirStr = "./res"; private final static String WTemplate = "<dimen name=\"x{0}\">{1}dp</dimen>\n"; private final static String HTemplate = "<dimen name=\"y{0}\">{1}dp</dimen>\n"; /** * {0}-HEIGHT */ private final static String VALUE_TEMPLATE = "values-{0}x{1}"; private final static String VALUE_TEMPLATE1 = "values"; private static final String SUPPORT_DIMESION = "1280,720;2048,1536;"; /** * 单位为px:倍数与屏幕分辨率有关，2.0f对应屏幕像素为：720*1280，生成的文件对应放在values-w720dp下面 * 单位为dp：multiple=0.5f，对应屏幕像素为：720*1280，生成的文件对应放在values-w720dp下面 */ private final static float multiple=0.5f; private String supportStr = SUPPORT_DIMESION; public GenerateValueFiles_land(int baseX, int baseY, String supportStr) { this.baseW = baseX; this.baseH = baseY; if (!this.supportStr.contains(baseX + "," + baseY)) { this.supportStr += baseX + "," + baseY + ";"; } this.supportStr += validateInput(supportStr); System.out.println(supportStr); File dir = new File(dirStr); if (!dir.exists()) { dir.mkdir(); } System.out.println(dir.getAbsoluteFile()); } /** * @param supportStr * w,h_...w,h; * @return */ private String validateInput(String supportStr) { StringBuffer sb = new StringBuffer(); String[] vals = supportStr.split("_"); int w = -1; int h = -1; String[] wh; for (String val : vals) { try { if (val == null || val.trim().length() == 0) continue; wh = val.split(","); w = Integer.parseInt(wh[0]); h = Integer.parseInt(wh[1]); } catch (Exception e) { System.out.println("skip invalidate params : w,h = " + val); continue; } sb.append(w + "," + h + ";"); } return sb.toString(); } public void generate() { String[] vals = supportStr.split(";"); for (String val : vals) { String[] wh = val.split(","); if(Integer.parseInt(wh[0])==baseW){ float multiple=1.0f; generateBaseXmlFile(Integer.parseInt(wh[0]), Integer.parseInt(wh[1]),multiple); } generateXmlFile(Integer.parseInt(wh[0]), Integer.parseInt(wh[1])); } } private void generateBaseXmlFile(int w, int h,float multiple) { StringBuffer sbForWidth = new StringBuffer(); sbForWidth.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); sbForWidth.append("<resources>\n"); float cellw = w * multiple / baseW; System.out.println("width : " + w + "," + baseW + "," + cellw); for (int i = 1; i <= baseW; i++) { sbForWidth.append("\t"+WTemplate.replace("{0}", i + "").replace("{1}", change(cellw * i) + "")); } // sbForWidth.append("\t"+WTemplate.replace("{0}", baseW + "").replace("{1}", // w + "")); sbForWidth.append("</resources>"); StringBuffer sbForHeight = new StringBuffer(); sbForHeight.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); sbForHeight.append("<resources>\n"); float cellh = h *multiple/ baseH; System.out.println("height : "+ h + "," + baseH + "," + cellh); for (int i = 1; i <= baseH; i++) { sbForHeight.append("\t"+HTemplate.replace("{0}", i + "").replace("{1}", change(cellh * i) + "")); } // sbForHeight.append("\t"+HTemplate.replace("{0}", baseH + "").replace("{1}", // h + "")); sbForHeight.append("</resources>"); File fileDir = new File(dirStr + File.separator + VALUE_TEMPLATE1+"-land"); fileDir.mkdir(); File layxFile = new File(fileDir.getAbsolutePath(), "ch_dimens_x.xml"); File layyFile = new File(fileDir.getAbsolutePath(), "ch_dimens_y.xml"); System.out.println(fileDir.toString()); try { PrintWriter pw = new PrintWriter(new FileOutputStream(layxFile)); pw.print(sbForWidth.toString()); pw.close(); pw = new PrintWriter(new FileOutputStream(layyFile)); pw.print(sbForHeight.toString()); pw.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } } private void generateXmlFile(int w, int h) { StringBuffer sbForWidth = new StringBuffer(); sbForWidth.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); sbForWidth.append("<resources>\n"); float cellw = w * multiple / baseW; System.out.println("width : " + w + "," + baseW + "," + cellw); for (int i = 1; i <= baseW; i++) { sbForWidth.append("\t"+WTemplate.replace("{0}", i + "").replace("{1}", change(cellw * i) + "")); } // sbForWidth.append("\t"+WTemplate.replace("{0}", baseW + "").replace("{1}", // w + "")); sbForWidth.append("</resources>"); StringBuffer sbForHeight = new StringBuffer(); sbForHeight.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); sbForHeight.append("<resources>\n"); float cellh = h *multiple/ baseH; System.out.println("height : "+ h + "," + baseH + "," + cellh); for (int i = 1; i <= baseH; i++) { sbForHeight.append("\t"+HTemplate.replace("{0}", i + "").replace("{1}", change(cellh * i) + "")); } // sbForHeight.append("\t"+HTemplate.replace("{0}", baseH + "").replace("{1}", // h + "")); sbForHeight.append("</resources>"); File fileDir = new File(dirStr + File.separator + VALUE_TEMPLATE.replace("{0}", w + "")// .replace("{1}", h + "")+"-land"); fileDir.mkdir(); File layxFile = new File(fileDir.getAbsolutePath(), "ch_dimens_x.xml"); File layyFile = new File(fileDir.getAbsolutePath(), "ch_dimens_y.xml"); try { PrintWriter pw = new PrintWriter(new FileOutputStream(layxFile)); pw.print(sbForWidth.toString()); pw.close(); pw = new PrintWriter(new FileOutputStream(layyFile)); pw.print(sbForHeight.toString()); pw.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } } public static float change(float a) { int temp = (int) (a * 100); return temp / 100f; } public static void main(String[] args) { int baseW = 1280; int baseH = 720; String addition = ""; try { if (args.length >= 3) { baseW = Integer.parseInt(args[0]); baseH = Integer.parseInt(args[1]); addition = args[2]; } else if (args.length >= 2) { baseW = Integer.parseInt(args[0]); baseH = Integer.parseInt(args[1]); } else if (args.length >= 1) { addition = args[0]; } } catch (NumberFormatException e) { System.err .println("right input params : java -jar xxx.jar width height w,h_w,h_..._w,h;"); e.printStackTrace(); System.exit(-1); } new GenerateValueFiles_land(baseW, baseH, addition).generate(); } }
3.项目已完成，作屏幕适配，根据已有的dimens.xml生成对应不同分辨率文件夹下的dimens.xml文件
package com.charlie.volley.utils; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileOutputStream; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; /** * eclipse下使用 * * 屏幕适配，自动生成dimens.xml * @author Charlie * * * 快速生成适配工具类 * 工具类代码，直接运行即可，（如果提示 Invalid layout of preloaded class 错误 项目设置如下即可 Project->Properties->Run/Debug Settings; Select your Class（DimenTool.java） and click "Edit"; Open the tab "Classpath" and remove Android Lib from "Bootstrap Entries"; Apply everything and Run the class again. */ public class DimensUtils { 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("./res/values/dimens.xml"); // File file = new File("./app/src/main/res/values/dimens.xml"); android studio BufferedReader reader = null; StringBuilder sw240 = new StringBuilder(); 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); //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( num * 0.75).append(end).append("\r\n"); sw480.append(start).append(num * 1.5).append(end).append("\r\n"); sw600.append(start).append(num * 1.87).append(end).append("\r\n"); sw720.append(start).append(num * 2.25).append(end).append("\r\n"); sw800.append(start).append(num * 2.5).append(end).append("\r\n"); w820.append(start).append(num * 2.56).append(end).append("\r\n"); } else { sw240.append(tempString).append(""); sw480.append(tempString).append(""); sw600.append(tempString).append(""); sw720.append(tempString).append(""); sw800.append(tempString).append(""); w820.append(tempString).append(""); } line++; } reader.close(); System.out.println("<!-- sw240 -->"); System.out.println(sw240); 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 = "./res/values-sw240dp/dimens.xml"; String sw480file = "./res/values-sw480dp/dimens.xml"; String sw600file = "./res/values-sw600dp/dimens.xml"; String sw720file = "./res/values-sw720dp/dimens.xml"; String sw800file = "./res/values-sw800dp/dimens.xml"; String w820file = "./res/values-w820dp/dimens.xml"; //将新的内容，写入到指定的文件中去 writeFile(sw240file, sw240.toString()); 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(); } } } } /** * 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); File fileDir = new File((String) file.subSequence(0, file.length()-11)); fileDir.mkdir(); out= new PrintWriter(new FileOutputStream(new File(file))); out.println(text); out.close(); } catch (IOException e) { e.printStackTrace(); } out.close(); } public static void main(String[] args) { gen(); } }
