screen adaptation

Idea: The total pixels of the screen width are divided into 320 equal parts, and the total pixels of the screen height are divided into 480 equal parts

 

Create a "layoutroot" adaptation file on the computer desktop:

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;

public class MakeXml {

    private final static String rootPath = "C:\\Users\\Administrator\\Desktop\\layoutroot\\values-{0}x{1}\\";

    private final static float dw = 320f;
    private final static float dh = 480f;

    private final static String WTemplate = "<dimen name=\"x{0}\">{1}px</dimen>\n";
    private final static String HTemplate = "<dimen name=\"y{0}\">{1}px</dimen>\n";

    public static void main(String[] args) {
        makeString(320, 480);
        makeString(480,800);
        makeString(480, 854);
        makeString(540, 960);
        makeString(600, 1024);
        makeString(720, 1184);
        makeString(720, 1196);
        makeString(720, 1280);
        makeString(768, 1024);
        makeString(800, 1280);
        makeString(1080, 1812);
        makeString(1080, 1920);
        makeString(1440, 2560);
    }

    public static void makeString(int w, int h) {

        StringBuffer sb = new StringBuffer();
        sb.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
        sb.append("<resources>");
        float cellw = w / dw;
        for (int i = 1; i < 320; i++) {
            sb.append(WTemplate.replace("{0}", i + "").replace("{1}",
                    change(cellw * i) + ""));
        }
        sb.append(WTemplate.replace("{0}", "320").replace("{1}", w + ""));
        sb.append("</resources>");

        StringBuffer sb2 = new StringBuffer();
        sb2.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
        sb2.append("<resources>");
        float cellh = h / dh;
        for (int i = 1; i < 480; i++) {
            sb2.append(HTemplate.replace("{0}", i + "").replace("{1}",
                    change(cellh * i) + ""));
        }
        sb2.append(HTemplate.replace("{0}", "480").replace("{1}", h + ""));
        sb2.append("</resources>");

        String path = rootPath.replace("{0}", h + "").replace("{1}", w + "");
        File rootFile = new File(path);
        if (!rootFile.exists()) {
            rootFile.mkdirs();
        }
        File layxFile = new File(path + "lay_x.xml");
        File layyFile = new File(path + "lay_y.xml");
        try {
            PrintWriter pw = new PrintWriter(new FileOutputStream(layxFile));
            pw.print(sb.toString());
            pw.close();
            pw = new PrintWriter(new FileOutputStream(layyFile));
            pw.print(sb2.toString());
            pw.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace ();
        }

    }

    public static float change(float a) {
        int temp = (int) (a * 100);
        return temp / 100f;
    }
}

 

For mobile phones that do not generate corresponding resolution files, the default values ​​folder will be used, and corresponding files will also be created in the default values, but the data inside is not easy to handle, because the resolution is not known, so the default value is x1=1dp to ensure compatibility as much as possible .

 

Original link: Android screen adaptation guide (the most authoritative official adaptation guide)