Android中Layout转成Java代码

android中总是要给控件指定一个id，然后还要在代码中写一个控件名称，两者要对应起来，这个工作本身就是体力劳动。这里我自己写了一个小的代码生成工具类，将anroid的xml布局文件生成为java文件，通过控制台输出。同时支持findViewById模式的，和xutils模式的。xml的解析使用到了pull解析器。demo中已包含jar文件了。举个例子：

假设有这样一个布局文件名字叫做empty.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"              android:id="@+id/empty"              android:layout_width="match_parent"              android:layout_height="match_parent"              android:gravity="center">    <ProgressBar android:id="@+id/loading_pb"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 style="@android:style/Widget.ProgressBar.Small.Inverse"/>    <TextView android:id="@+id/tv_loading"              android:layout_width="wrap_content"              android:layout_height="wrap_content"              android:layout_toRightOf="@+id/loading_pb"              android:text="加载中..."/>LinearLayout>

通过我的工具类XMLGen.java，直接输出依据id生成的控件名称。从控制台copy一下到代码中就行了。

import org.xmlpull.v1.XmlPullParser;import org.xmlpull.v1.XmlPullParserException;import org.xmlpull.v1.XmlPullParserFactory;import java.io.ByteArrayInputStream;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.util.ArrayList;/** * 传入一个xml字符串，转换成 */public class XMLGen {    private static String xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"            + "\n"            + "            + "              android:id=\"@+id/empty\"\n"            + "              android:layout_width=\"match_parent\"\n"            + "              android:layout_height=\"match_parent\"\n"            + "              android:gravity=\"center\">\n"            + "                + "                 android:layout_width=\"wrap_content\"\n"            + "                 android:layout_height=\"wrap_content\"\n"            + "                 style=\"@android:style/Widget.ProgressBar.Small.Inverse\"/>\n"            + "                + "              android:layout_width=\"wrap_content\"\n"            + "              android:layout_height=\"wrap_content\"\n"            + "              android:layout_toRightOf=\"@+id/loading_pb\"\n"            + "              android:text=\"加载中...\"/>\n" + "";    private static String xmlpath = "empty.xml";    private static String viewInject = "@ViewInject(R.id.%s)\n";    private static String findViewById = "%s = (%s) %sfindViewById(R.id.%s);\n";    private static String viewName = "private %s %s;\n";    private static XmlPullParserFactory factory;    private static XmlPullParser parser;    public static void main(String[] args) {        try {            factory = XmlPullParserFactory.newInstance();            parser = factory.newPullParser();            parserXMLNormal(new ByteArrayInputStream(xml.getBytes()), null);            System.out                    .println("-==============================================================");            parserXML(new ByteArrayInputStream(xml.getBytes()));            System.out                    .println("*****************************************************************");            parserXMLNormal(new FileInputStream(new File(xmlpath)), null);            System.out                    .println("-==============================================================");            parserXML(new FileInputStream(new File(xmlpath)));        } catch (Exception e) {            e.printStackTrace();            System.out.println("出错啦，蛋疼啊，就不能一次跑通吗？？");        }    }    /**     * 依赖于xutis的ioc     *      * @param is     * @throws XmlPullParserException     * @throws IOException     */    private static void parserXML(InputStream is)            throws XmlPullParserException, IOException {        parser.setInput(is, "UTF-8"); // 设置输入流 并指明编码方式        StringBuffer sb = new StringBuffer();        int eventType = parser.getEventType();        while (eventType != XmlPullParser.END_DOCUMENT) {            eventType = parser.next();            if (eventType == XmlPullParser.START_TAG) {                for (int i = 0, count = parser.getAttributeCount(); i < count; i++) {                    if (parser.getAttributeName(i).equals("android:id")) {                        String id = parser.getAttributeValue(i).replace(                                "@+id/", "");                        sb.append(String.format(viewInject, id));                        StringBuffer idSb = new StringBuffer();                        // 将所有_开头的首字母大写                        if (id.contains("_")) {                            String[] args = id.split("_");                            for (String s : args) {                                idSb.append(toUpperCaseFirstOne(s));                            }                        } else {                            idSb.append(toUpperCaseFirstOne(id));                        }                        idSb.insert(0, "m");                        sb.append(String.format(viewName, parser.getName(),                                idSb.toString()));                    }                }            }            if (eventType == XmlPullParser.END_DOCUMENT) {                System.out.println(sb.toString());            }        }    }    /**     * 普通方式生成findViewById     *      * @param is     * @param valueName     * @throws XmlPullParserException     * @throws IOException     */    private static void parserXMLNormal(InputStream is, String valueName)            throws XmlPullParserException, IOException {        parser.setInput(is, "UTF-8"); // 设置输入流 并指明编码方式        if (valueName == null) {            valueName = "";        }        if (!valueName.contains(".") && valueName.length() > 0) {            valueName.replace(valueName, valueName + ".");        }        ArrayList ids = new ArrayList();        ArrayList views = new ArrayList();        int eventType = parser.getEventType();        while (eventType != XmlPullParser.END_DOCUMENT) {            eventType = parser.next();            if (eventType == XmlPullParser.START_TAG) {                for (int i = 0, count = parser.getAttributeCount(); i < count; i++) {                    if (parser.getAttributeName(i).equals("android:id")) {                        String id = parser.getAttributeValue(i).replace(                                "@+id/", "");                        StringBuffer idSb = new StringBuffer();                        // 将所有_开头的首字母大写                        if (id.contains("_")) {                            String[] args = id.split("_");                            for (String s : args) {                                idSb.append(toUpperCaseFirstOne(s));                            }                        } else {                            idSb.append(toUpperCaseFirstOne(id));                        }                        idSb.insert(0, "m");                        views.add(String.format(viewName, parser.getName(),                                idSb.toString()));                        ids.add(String.format(findViewById, idSb.toString(),                                parser.getName(), valueName, id));                    }                }            }            if (eventType == XmlPullParser.END_DOCUMENT) {                for (String s : views) {                    System.out.print(s);                }                for (String s : ids) {                    System.out.print(s);                }            }        }    }    // 首字母转大写    public static String toUpperCaseFirstOne(String s) {        if (Character.isUpperCase(s.charAt(0)))            return s;        else            return (new StringBuilder())                    .append(Character.toUpperCase(s.charAt(0)))                    .append(s.substring(1)).toString();    }}

控制台输出模版：

private LinearLayout mEmpty;private ProgressBar mLoadingPb;private TextView mTvLoading;mEmpty = (LinearLayout) findViewById(R.id.empty);mLoadingPb = (ProgressBar) findViewById(R.id.loading_pb);mTvLoading = (TextView) findViewById(R.id.tv_loading);-==============================================================@ViewInject(R.id.empty)private LinearLayout mEmpty;@ViewInject(R.id.loading_pb)private ProgressBar mLoadingPb;@ViewInject(R.id.tv_loading)private TextView mTvLoading;*****************************************************************private LinearLayout mEmpty;private ProgressBar mLoadingPb;private TextView mTvLoading;mEmpty = (LinearLayout) findViewById(R.id.empty);mLoadingPb = (ProgressBar) findViewById(R.id.loading_pb);mTvLoading = (TextView) findViewById(R.id.tv_loading);-==============================================================@ViewInject(R.id.empty)private LinearLayout mEmpty;@ViewInject(R.id.loading_pb)private ProgressBar mLoadingPb;@ViewInject(R.id.tv_loading)private TextView mTvLoading;

这里只是为了方便自己的开发，减少劳动量，所以代码写的不咋样，能用就好了。有兴趣的朋友可以自己改改。最后给出demo下载地址： http://www.oschina.net/code/snippet_924286_44839

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