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
<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 = "\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