用dimens去实现 屏幕适配

版权声明：本文为博主原创文章，未经博主允许不得转载。

屏幕适配很简单

没想到到现在了还有人在各种问屏幕适配的问题。我真是服了。

15年的时候国内就有很多大神分享了各种屏幕适配的方法。

最近突然被十几个人问。我依然为了应付回答来写博客了。哈哈

我们公司就是dimens方法。最low、最简单、最实用。

下面是代码直上代码。这个代码运行一下就会出现一堆res文件。然后复制到 工程里面就好了

<code class="hljs java has-numbering"><span class="hljs-keyword">package</span> com.example;

<span class="hljs-keyword">import</span> java.io.File;
<span class="hljs-keyword">import</span> java.io.FileNotFoundException;
<span class="hljs-keyword">import</span> java.io.FileOutputStream;
<span class="hljs-keyword">import</span> java.io.PrintWriter;

<span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">GenerateValueFiles</span> {</span>

<span class="hljs-keyword">private</span> <span class="hljs-keyword">int</span> baseW;
<span class="hljs-keyword">private</span> <span class="hljs-keyword">int</span> baseH;

<span class="hljs-keyword">private</span> String dirStr = <span class="hljs-string">"./res"</span>;

<span class="hljs-keyword">private</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">static</span> String WTemplate = <span class="hljs-string">"<dimen name=\"x{0}\">{1}px</dimen>\n"</span>;
<span class="hljs-keyword">private</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">static</span> String HTemplate = <span class="hljs-string">"<dimen name=\"y{0}\">{1}px</dimen>\n"</span>;

<span class="hljs-javadoc">/**
* {0}-HEIGHT
*/</span>
<span class="hljs-keyword">private</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">static</span> String VALUE_TEMPLATE = <span class="hljs-string">"values-{0}x{1}"</span>;

<span class="hljs-keyword">private</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">final</span> String SUPPORT_DIMESION =
<span class="hljs-string">"320,480;480,800;480,854;540,960;"</span> +
<span class="hljs-string">"600,1024;720,1184;720,1196;720,1280;768,1024;"</span> +
<span class="hljs-string">"768,1280;800,1280;1080,1812;1080,1920;1440,2560;"</span>;

<span class="hljs-keyword">private</span> String supportStr = SUPPORT_DIMESION;

<span class="hljs-keyword">public</span> <span class="hljs-title">GenerateValueFiles</span>(<span class="hljs-keyword">int</span> baseX, <span class="hljs-keyword">int</span> baseY, String supportStr) {
<span class="hljs-keyword">this</span>.baseW = baseX;
<span class="hljs-keyword">this</span>.baseH = baseY;

<span class="hljs-keyword">if</span> (!<span class="hljs-keyword">this</span>.supportStr.contains(baseX + <span class="hljs-string">","</span> + baseY)) {
<span class="hljs-keyword">this</span>.supportStr += baseX + <span class="hljs-string">","</span> + baseY + <span class="hljs-string">";"</span>;
}

<span class="hljs-keyword">this</span>.supportStr += validateInput(supportStr);

System.out.println(supportStr);

File dir = <span class="hljs-keyword">new</span> File(dirStr);
<span class="hljs-keyword">if</span> (!dir.exists()) {
dir.mkdir();

}
System.out.println(dir.getAbsoluteFile());

}

<span class="hljs-javadoc">/**
*<span class="hljs-javadoctag"> @param</span> supportStr w,h_...w,h;
*<span class="hljs-javadoctag"> @return</span>
*/</span>
<span class="hljs-keyword">private</span> String <span class="hljs-title">validateInput</span>(String supportStr) {
StringBuffer sb = <span class="hljs-keyword">new</span> StringBuffer();
String[] vals = supportStr.split(<span class="hljs-string">"_"</span>);
<span class="hljs-keyword">int</span> w = -<span class="hljs-number">1</span>;
<span class="hljs-keyword">int</span> h = -<span class="hljs-number">1</span>;
String[] wh;
<span class="hljs-keyword">for</span> (String val : vals) {
<span class="hljs-keyword">try</span> {
<span class="hljs-keyword">if</span> (val == <span class="hljs-keyword">null</span> || val.trim().length() == <span class="hljs-number">0</span>)
<span class="hljs-keyword">continue</span>;

wh = val.split(<span class="hljs-string">","</span>);
w = Integer.parseInt(wh[<span class="hljs-number">0</span>]);
h = Integer.parseInt(wh[<span class="hljs-number">1</span>]);
} <span class="hljs-keyword">catch</span> (Exception e) {
System.out.println(<span class="hljs-string">"skip invalidate params : w,h = "</span> + val);
<span class="hljs-keyword">continue</span>;
}
sb.append(w + <span class="hljs-string">","</span> + h + <span class="hljs-string">";"</span>);
}

<span class="hljs-keyword">return</span> sb.toString();
}

<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">generate</span>() {
String[] vals = supportStr.split(<span class="hljs-string">";"</span>);
<span class="hljs-keyword">for</span> (String val : vals) {
String[] wh = val.split(<span class="hljs-string">","</span>);
generateXmlFile(Integer.parseInt(wh[<span class="hljs-number">0</span>]), Integer.parseInt(wh[<span class="hljs-number">1</span>]));
}

}

<span class="hljs-keyword">private</span> <span class="hljs-keyword">void</span> <span class="hljs-title">generateXmlFile</span>(<span class="hljs-keyword">int</span> w, <span class="hljs-keyword">int</span> h) {

StringBuffer sbForWidth = <span class="hljs-keyword">new</span> StringBuffer();
sbForWidth.append(<span class="hljs-string">"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"</span>);
sbForWidth.append(<span class="hljs-string">"<resources>"</span>);
<span class="hljs-keyword">float</span> cellw = w * <span class="hljs-number">1.0</span>f / baseW;

System.out.println(<span class="hljs-string">"width : "</span> + w + <span class="hljs-string">","</span> + baseW + <span class="hljs-string">","</span> + cellw);
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i = <span class="hljs-number">1</span>; i < baseW; i++) {
sbForWidth.append(WTemplate.replace(<span class="hljs-string">"{0}"</span>, i + <span class="hljs-string">""</span>).replace(<span class="hljs-string">"{1}"</span>,
change(cellw * i) + <span class="hljs-string">""</span>));
}
sbForWidth.append(WTemplate.replace(<span class="hljs-string">"{0}"</span>, baseW + <span class="hljs-string">""</span>).replace(<span class="hljs-string">"{1}"</span>,
w + <span class="hljs-string">""</span>));
sbForWidth.append(<span class="hljs-string">"</resources>"</span>);

StringBuffer sbForHeight = <span class="hljs-keyword">new</span> StringBuffer();
sbForHeight.append(<span class="hljs-string">"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"</span>);
sbForHeight.append(<span class="hljs-string">"<resources>"</span>);
<span class="hljs-keyword">float</span> cellh = h * <span class="hljs-number">1.0</span>f / baseH;
System.out.println(<span class="hljs-string">"height : "</span> + h + <span class="hljs-string">","</span> + baseH + <span class="hljs-string">","</span> + cellh);
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i = <span class="hljs-number">1</span>; i < baseH; i++) {
sbForHeight.append(HTemplate.replace(<span class="hljs-string">"{0}"</span>, i + <span class="hljs-string">""</span>).replace(<span class="hljs-string">"{1}"</span>,
change(cellh * i) + <span class="hljs-string">""</span>));
}
sbForHeight.append(HTemplate.replace(<span class="hljs-string">"{0}"</span>, baseH + <span class="hljs-string">""</span>).replace(<span class="hljs-string">"{1}"</span>,
h + <span class="hljs-string">""</span>));
sbForHeight.append(<span class="hljs-string">"</resources>"</span>);

File fileDir = <span class="hljs-keyword">new</span> File(dirStr + File.separator
+ VALUE_TEMPLATE.replace(<span class="hljs-string">"{0}"</span>, h + <span class="hljs-string">""</span>)<span class="hljs-comment">//</span>
.replace(<span class="hljs-string">"{1}"</span>, w + <span class="hljs-string">""</span>));
fileDir.mkdir();

File layxFile = <span class="hljs-keyword">new</span> File(fileDir.getAbsolutePath(), <span class="hljs-string">"lay_x.xml"</span>);
File layyFile = <span class="hljs-keyword">new</span> File(fileDir.getAbsolutePath(), <span class="hljs-string">"lay_y.xml"</span>);
<span class="hljs-keyword">try</span> {
PrintWriter pw = <span class="hljs-keyword">new</span> PrintWriter(<span class="hljs-keyword">new</span> FileOutputStream(layxFile));
pw.print(sbForWidth.toString());
pw.close();
pw = <span class="hljs-keyword">new</span> PrintWriter(<span class="hljs-keyword">new</span> FileOutputStream(layyFile));
pw.print(sbForHeight.toString());
pw.close();
} <span class="hljs-keyword">catch</span> (FileNotFoundException e) {
e.printStackTrace();
}
}

<span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">float</span> <span class="hljs-title">change</span>(<span class="hljs-keyword">float</span> a) {
<span class="hljs-keyword">int</span> temp = (<span class="hljs-keyword">int</span>) (a * <span class="hljs-number">100</span>);
<span class="hljs-keyword">return</span> temp / <span class="hljs-number">100</span>f;
}

<span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title">main</span>(String[] args) {
<span class="hljs-keyword">int</span> baseW = <span class="hljs-number">720</span> ;
<span class="hljs-keyword">int</span> baseH = <span class="hljs-number">1280</span>;
String addition = <span class="hljs-string">""</span>;
<span class="hljs-keyword">try</span> {
<span class="hljs-keyword">if</span> (args.length >= <span class="hljs-number">3</span>) {
baseW = Integer.parseInt(args[<span class="hljs-number">0</span>]);
baseH = Integer.parseInt(args[<span class="hljs-number">1</span>]);
addition = args[<span class="hljs-number">2</span>];
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (args.length >= <span class="hljs-number">2</span>) {
baseW = Integer.parseInt(args[<span class="hljs-number">0</span>]);
baseH = Integer.parseInt(args[<span class="hljs-number">1</span>]);
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (args.length >= <span class="hljs-number">1</span>) {
addition = args[<span class="hljs-number">0</span>];
}
} <span class="hljs-keyword">catch</span> (NumberFormatException e) {

System.err
.println(<span class="hljs-string">"right input params : java -jar xxx.jar width height w,h_w,h_..._w,h;"</span>);
e.printStackTrace();
System.exit(-<span class="hljs-number">1</span>);
}

<span class="hljs-keyword">new</span> GenerateValueFiles(baseW, baseH, addition).generate();
}

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运行完之后出现res文件夹，他下面会出现一堆values文件。直接复制到as里面这样的



这个方法立竿见影。直接用就好了。不懂得看看代码也能明白

尊重原创：http://write.blog.csdn.net/mdeditor#!postId=51131403