Android中Layout轉成Java代碼

標籤：

android中總是要給控制項指定一個id，然後還要在代碼中寫一個控制項名稱，兩者要對應起來，這個工作本身就是體力勞動。這裡我自己寫了一個小的代碼產生工具類，將anroid的xml布局檔案產生為java檔案，通過控制台輸出。同時支援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檔案了。舉個例子：

假設有這樣一個布局檔案名稱字叫做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="載入中..."/></LinearLayout>

通過我的工具類XMLGen.java，直接輸出依據id產生的控制項名稱。從控制台copy一下到代碼中就行了。

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;/** * 傳入一個xml字串，轉換成 */public class XMLGen {private static String xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"+ "\n"+ "<LinearLayout xmlns:android=\"http://schemas.android.com/apk/res/android\"\n"+ "              android:id=\"@+id/empty\"\n"+ "              android:layout_width=\"match_parent\"\n"+ "              android:layout_height=\"match_parent\"\n"+ "              android:gravity=\"center\">\n"+ "    <ProgressBar android:id=\"@+id/loading_pb\"\n"+ "                 android:layout_width=\"wrap_content\"\n"+ "                 android:layout_height=\"wrap_content\"\n"+ "                 style=\"@android:style/Widget.ProgressBar.Small.Inverse\"/>\n"+ "    <TextView android:id=\"@+id/tv_loading\"\n"+ "              android:layout_width=\"wrap_content\"\n"+ "              android:layout_height=\"wrap_content\"\n"+ "              android:layout_toRightOf=\"@+id/loading_pb\"\n"+ "              android:text=\"載入中...\"/>\n" + "</LinearLayout>";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("出錯啦，蛋疼啊，就不能一次跑通嗎？？");}}/** * 依賴於xutis的ioc *  * @param is * @throws XmlPullParserException * @throws IOException */private static void parserXML(InputStream is)throws XmlPullParserException, IOException {parser.setInput(is, "UTF-8"); // 設定輸入資料流 並指明編碼方式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();// 將所有_開頭的首字母大寫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());}}}/** * 普通方式產生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"); // 設定輸入資料流 並指明編碼方式if (valueName == null) {valueName = "";}if (!valueName.contains(".") && valueName.length() > 0) {valueName.replace(valueName, valueName + ".");}ArrayList<String> ids = new ArrayList<String>();ArrayList<String> views = new ArrayList<String>();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();// 將所有_開頭的首字母大寫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);}}}}// 首字母轉大寫public static String toUpperCaseFirstOne(String s) {if (Character.isUpperCase(s.charAt(0)))return s;elsereturn (new StringBuilder()).append(Character.toUpperCase(s.charAt(0))).append(s.substring(1)).toString();}}

控制台輸出模版：

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;

這裡只是為了方便自己的開發，減少勞動量，所以代碼寫的不咋樣，能用就好了。有興趣的朋友可以自己改改。最後給出demo： http://www.oschina.net/code/snippet_924286_44839

Android中Layout轉成Java代碼