关于屏幕适配的一些看法

因为分辨率不一样,所以不能用px;因为屏幕宽度不一样,所以要小心的用dp,那么我们可不可以用另外一种方法来统一单位,不管分辨率是多大,屏幕宽度用一个固定的值的单位来统计呢?

答案是:当然可以。

我们假设手机屏幕的宽度都是320某单位,那么我们将一个屏幕宽度的总像素数平均分成320份,每一份对应具体的像素就可以了

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]
";
    private final static String HTemplate = "[dimen name="y{0}"]{1}px[/dimen]
";
  
    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"?]
");
        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"?]
");
        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;
    }
}

代码应该很好懂,我们将一个屏幕宽度分为320份,高度480份,然后按照实际像素对每一个单位进行复制,放在对应values-widthxheight文件夹下面的lax.xml和lay.xml里面,这样就可以统一所有你想要的分辨率的单位了,下面是生成的一个320*480分辨率的文件,因为宽高分割之后总分数和像素数相同,所以x1就是1px,以此类推。

原文地址:https://www.cnblogs.com/zhujiabin/p/5128845.html