根据UI提供标注图的标注尺寸，设置baseW（基准宽度）和baseH（基准高度）
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;
public class GenerateValueFiles {
private static int baseW = 360;//基准宽度
private static int baseH = 800;//基准高度
private String dirStr = "./res";
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";
private final static String VALUE_TEMPLATE = "values-{0}x{1}";
private static final String SUPPORT_DIMESION = "320,480;"
+ "480,800;480,854;"
+ "540,854;540,960;"
+ "600,800;600,1024;"
+ "640,960;"
+ "720,1184;720,1196;720,1208;720,1280;"
+ "768,1024;768,1280;"
+ "800,1280;"
+ "1080,1700;1080,1776;1080,1794;1080,1800;1080,1812;1080,1920;"
+ "1440,2416;1440,2560;"
+ "1600,2560;";
private String supportStr = SUPPORT_DIMESION;
public GenerateValueFiles(String supportStr) {
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(",");
generateXmlFile(Integer.parseInt(wh[0]), Integer.parseInt(wh[1]));
}
generateDefaultXmlFile(baseW,baseH);
}
private void generateXmlFile(int w, int h) {
StringBuffer sbForWidth = new StringBuffer();
sbForWidth.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
sbForWidth.append("<resources>");
float cellw = w * 1.0f / baseW;
System.out.println("width : " + w + "," + baseW + "," + cellw);
for (int i = 1; i <=baseW; i++) {
sbForWidth.append(WTemplate.replace("{0}", i + "").replace("{1}",
change(cellw * i) + ""));
}
sbForWidth.append("</resources>");
StringBuffer sbForHeight = new StringBuffer();
sbForHeight.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
sbForHeight.append("<resources>");
float cellh = w *1.0f/ baseW;
System.out.println("height : "+ h + "," + baseH + "," + cellh);
for (int i = 1; i <= baseH; i++) {
sbForHeight.append(HTemplate.replace("{0}", i + "").replace("{1}",
change(cellh * i) + ""));
}
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(), "lay_x.xml");
File layyFile = new File(fileDir.getAbsolutePath(), "lay_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();
}
}
private void generateDefaultXmlFile(int w, int h){
StringBuffer sbForWidth = new StringBuffer();
sbForWidth.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
sbForWidth.append("<resources>");
float cellw = w * 1.0f / baseW;
System.out.println("width : " + w + "," + baseW + "," + cellw);
for (int i = 1; i < baseW; i++) {
sbForWidth.append(WTemplate.replace("{0}", i + "").replace("{1}",
change(cellw * i) + "").replace("px", "dp"));
}
sbForWidth.append(WTemplate.replace("{0}", baseW + "").replace("{1}",
w + "").replace("px", "dp"));
sbForWidth.append("</resources>");
StringBuffer sbForHeight = new StringBuffer();
sbForHeight.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
sbForHeight.append("<resources>");
float cellh = h *1.0f/ baseH;
System.out.println("height : "+ h + "," + baseH + "," + cellh);
for (int i = 1; i < baseH; i++) {
sbForHeight.append(HTemplate.replace("{0}", i + "").replace("{1}",
change(cellh * i) + "").replace("px", "dp"));
}
sbForHeight.append(HTemplate.replace("{0}", baseH + "").replace("{1}",
h + "").replace("px", "dp"));
sbForHeight.append("</resources>");
File fileDir = new File(dirStr + File.separator
+ VALUE_TEMPLATE.substring(0, 6));
fileDir.mkdir();
File layxFile = new File(fileDir.getAbsolutePath(), "lay_x.xml");
File layyFile = new File(fileDir.getAbsolutePath(), "lay_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) {
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(addition).generate();
}
}
运行以上代码，会得到 res/values-x-x 文件，直接复制到项目的res路径下即可。
如何使用？
xml中指定width和height时，直接使用UI标注图中的尺寸，如UI标注128（不区分是宽度或高度，它们等效的），xml中就可以使用lay_x128。
lay_y和lay_x是一样的内容，不需要的可以删除所有的lay_x文件，唯一区别是lay_y的范围可以自由设置（比如800），在UI中如果有一个控件的UI标注尺寸为400，在lay_x中并没有lay_x400，这时你就可以使用lay_y400了。
有虚拟导航条的手机屏幕适配问题？
比如一款手机屏幕的物理尺寸为1920*1080，如果没有虚拟导航条它适配了values-1920x1080，但是有虚拟导航条时，它所适配的values文件就不是values-1920x1080了，而是高度减去虚拟导航条的values文件，比如虚拟导航条的高度为108，这时它适配的就是values-1812x1080。需要注意的是，虚拟导航条可以手动设置为隐藏，当隐藏状态下时，它适配的就是values-1920x1080了。
那么我们怎么知道虚拟导航条的高度？
可以写一个测试demo运行在这款手机上，执行如下代码：
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.Display;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
DisplayMetrics dm = new DisplayMetrics();
Display display = getWindowManager().getDefaultDisplay();
display.getMetrics(dm);
TextView mTextView = (TextView) findViewById(R.id.main_tv);
mTextView.setText("width:"+dm.widthPixels+",height:"+dm.heightPixels);
}
}
运行该app就可以在textview中显示当前状态下适配屏幕所需要的宽和高了。
如果SUPPORT_DIMESION 中没有你想要适配屏幕的尺寸，你可以自行添加进去（格式为 宽，高）。
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