自動生成Android屏幕適配的dimens.xml

最近團隊再做Android App的屏幕適配，按照官方的辦法是layout文件引用dimen變量，  變量放在多個不同分辨率下的dimens.xml文件中，分別放在不同的目錄下，

    ./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  

人工處理這些dimens.xml，感覺比較麻煩，就是個體力活，于是做了個工具類按比例自動化生成dimens.xml文件，效率瞬間提高了很多倍，如果需要特殊定義尺寸，放到另一個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>  </pre><br />

工具類代碼，直接運行即可 

    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;


/** 
 * 根據values/dimens.xml, 自動計算比例并生成不同分辨率的dimens.xml 
 * 注意用dp和sp，不要用dip，否則生成可能會出錯；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;  
            // 一次讀入一行，直到讀入null為文件結束  

            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();  
    }  
}  </pre><br />

來自：http://blog.csdn.net/offbye/article/details/48658097