android多屏适配
现在通用的多屏适配有如下三种
1.match_parent
2.weight
3.多个文件夹（small，normal，large，and extra large），然后分别给出（计算）控件大小第一个和第二个比较好理解,但是应用范围比较窄.比如我需要一个长宽均为屏幕一半的button并且要在屏幕正中间.用match_parent肯定不行,用weight可以倒是可以,但是不觉得还要多用好几个控件把空白地方撑满不方便吗?这只是个demo,如果在项目中呢?那么就只能采用第三种
参考文章: http://blog.csdn.net/lmj623565791/article/details/45460089 http://www.cnblogs.com/soaringEveryday/p/4835839.html
接下来我就讲讲具体怎么做
1.计算屏幕的宽和高
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int width = dm.widthPixels; // 得到宽度
int height = dm.heightPixels; // 得到高度
Log.e("DisplayMetrics", height + "*" + width);2.用GenerateValueFiles.java（Java工程）生成对应的values文件夹
这个文件我是从参考文章中拿下来并且修改过的.为了区分横屏还是竖屏,我把竖屏的文件夹名字添加了land标记 输入一次w和h 输出两个文件夹values-h*w(竖屏专用)和values-land-w*h(横屏)，每次只要选一个就行
3.把values文件夹copy进android工程
接下来我用虚拟机演示一下
（1）横屏
这里写图片描述
数据显示w=2560,h=1504 GenerateValueFiles文件的main函数指明了参数的规则
这里写图片描述
所以
private static final String SUPPORT_DIMESION = "2560,1504;";生成的文件夹如下
这里写图片描述
由于这是横屏，所以只需要values-land-2560x1504这个文件夹
（2）竖屏
ctrl+F11切换竖屏
这里写图片描述
GenerateValueFiles文件里面
private static final String SUPPORT_DIMESION = "2560,1504;1600,2464;";生成的文件夹
这里写图片描述
这次我只需要黑色的文件夹
（3）展示
android工程的文件夹res目录如下，就是多了两个对应的文件夹
这里写图片描述
布局文件如下
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
tools:context="com.example.multiscreen.MainActivity" >
<Button
android:layout_width="@dimen/x160"
android:layout_height="@dimen/y240"
android:gravity="center"
android:text="Button" />
</RelativeLayout>参考文章里说的很清楚，把宽度分成320分，那么160份就是整个屏幕的一半
运行看效果
这里写图片描述
这里写图片描述
忘了把GenerateValueFiles.java代码贴出来
public class GenerateValueFiles {
private int baseW;
private int baseH;
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";
/**
* {0}-HEIGHT
*/
private final static String POTARIT_VALUE_TEMPLATE = "values-{0}x{1}";
/**
* {0}-WIDTH
*/
private final static String LAND_VALUE_TEMPLATE = "values-land-{0}x{1}";
private static final String SUPPORT_DIMESION = "2560,1504;1600,2464;";
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(",");
generatePotraitXmlFile(Integer.parseInt(wh[0]),
Integer.parseInt(wh[1]));
generateLandXmlFile(Integer.parseInt(wh[0]),
Integer.parseInt(wh[1]));
}
}
/**
* 竖屏
*/
private void generatePotraitXmlFile(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(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>");
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) + ""));
}
sbForHeight.append(HTemplate.replace("{0}", baseH + "").replace("{1}",
h + ""));
sbForHeight.append("</resources>");
File fileDir = new File(dirStr + File.separator
+ POTARIT_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();
}
}
/**
* 横屏
*/
private void generateLandXmlFile(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(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>");
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) + ""));
}
sbForHeight.append(HTemplate.replace("{0}", baseH + "").replace("{1}",
h + ""));
sbForHeight.append("</resources>");
File fileDir = new File(dirStr + File.separator
+ LAND_VALUE_TEMPLATE.replace("{0}", w + "")//
.replace("{1}", h + ""));
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) {
int baseW = 320;
int baseH = 480;
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();
}
}本文参与 腾讯云自媒体分享计划，分享自作者个人站点/博客。
原始发表：2016年11月09日，如有侵权请联系 cloudcommunity@tencent.com 删除
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