android 反编译的一些问题

 今天反编译了一个apk，结果资源文件都被在java文件中都是十进制。这咋办?

 还好发现一个values文件夹下 发现个 public.xml。 这个文件是资源被便宜成十六进制的文件。

我取个节点出来看看就明白了

<public type="attr" name="backColor" id="0x7f010000" />
<public type="attr" name="textColor" id="0x7f010001" />
<public type="attr" name="backAlpha" id="0x7f010002" />

 

0x7f010000 就是对应的backColor，把0x去了就是7f010000，这个是十六进制

转化成十进制就是2130771968，那就找到了对应的文件了，呵呵，就是R.drawable.backColor

贴上代码

复制代码import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.InputStream; import java.math.BigInteger; import java.util.HashMap; import java.util.Map; import java.util.regex.Matcher; import java.util.regex.Pattern; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; public class FindReplace { public Map<String, String> resources = new HashMap<String, String>(); // key:id value:R.id.bg public static File xml = new File("C:/test4/code/res/values/public.xml"); //XML路径 public static File file = new File("D:/php/Android/study/calldisplay/src/com/ningbin/calldisplay"); //待替换的源码文件夹 public static void main(String[] args) { long start = System.currentTimeMillis(); FindReplace replace = new FindReplace(); replace.findReplace(replace.findReplaceXml(xml), file); System.out.println("用时:" + (System.currentTimeMillis() - start)); } /** * 生成十六进制转成十进制的资源文件 * @param file * @return */ public File findReplaceXml(File file) { FileReader fr = null; FileWriter fw = null; File fileTemp = new File(file.getParent(), "re"+file.getName()); try { fr = new FileReader(file); fw = new FileWriter(fileTemp); BufferedReader bf = new BufferedReader(fr); String str = null;// 取一行 while ((str = bf.readLine()) != null) { // 一行一行的读取全部内容 // 显示行号 int index = str.lastIndexOf("id="0x"); if (index != -1) { index = index + 6; String s = str.substring(index, index + 8); str = str.replace("0x" + s, hexToDecimal(s)); } fw.write(str); fw.write("rn");// 写入换行 } fw.close(); } catch (Exception e) { e.printStackTrace(); } return fileTemp; } /** * 十六进制转成十进制 * @param hexString * @return */ private static String hexToDecimal(String hexString) { BigInteger bi = null; bi = new BigInteger(hexString, 16); String show = bi.toString(10); return show; } /** * 查找替换 * @param xml * @param fileDir */ public void findReplace(File xml, File fileDir) { InputStream inStream = null; try { initMap(new FileInputStream(xml)); findFileList(fileDir); } catch (FileNotFoundException e) { e.printStackTrace(); } finally { if (inStream != null) try { inStream.close(); } catch (IOException e) { e.printStackTrace(); } } } /** * 正则表达式查找替换 */ private String matcher(String regex) { Matcher m = Pattern.compile("[0-9]\d{9}").matcher(regex); while (m.find()) { String recource = resources.get(m.group()); if(recource!=null){ System.out.println(m.group() + ":"+recource); regex = regex.replaceAll(m.group(), recource); } } return regex; } /** * 递归遍历目录文件 * * @param file * @param resourceContent * @param replaceContent */ public void findFileList(File file) { File[] files = file.listFiles(); if (files == null) { return; } for (File f : files) { if (f.isDirectory()) { findFileList(f); } else { if (f.getName().endsWith(".java")) { transferFile(f); // 查找替换 } } } } /** * 保存到原文件 * @param file */ private void transferFile(File file) { try { FileReader reader = new FileReader(file); char[] dates = new char[1024]; int count = 0; StringBuilder sb = new StringBuilder(); while ((count = reader.read(dates)) > 0) { String str = String.valueOf(dates, 0, count); sb.append(str); } reader.close(); // 从构造器中生成字符串，并替换搜索文本 String fileContent = matcher(sb.toString()); FileWriter writer = new FileWriter(file); writer.write(fileContent.toCharArray()); writer.close(); } catch (Exception e) { e.printStackTrace(); } } /** * 从流中初始化资源集合 * // R.attr.name 2130771968 * @param inStream */ public void initMap(InputStream inStream) { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); try { DocumentBuilder builder = factory.newDocumentBuilder(); Document dom = builder.parse(inStream); Element root = dom.getDocumentElement(); NodeList items = root.getElementsByTagName("public");// 查找所有person节点 System.out.println("XML文件中有记录:" + items.getLength()); for (int i = 0; i < items.getLength(); i++) { // 得到public节点 Element publicNode = (Element) items.item(i); resources.put(publicNode.getAttribute("id"), "R." + publicNode.getAttribute("type") + "." + publicNode.getAttribute("name")); } System.out.println("添加记录："+resources.size()); inStream.close(); } catch (Exception e) { e.printStackTrace(); } } }

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import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

public class FindReplace {

	public Map<String, String> resources = new HashMap<String, String>(); // key:id value:R.id.bg

	public static File xml = new File("C:/test4/code/res/values/public.xml");	//XML路径
	public static File file = new File("D:/php/Android/study/calldisplay/src/com/ningbin/calldisplay");	//待替换的源码文件夹
	
	public static void main(String[] args) {
		long start = System.currentTimeMillis();
		FindReplace replace = new FindReplace();
		replace.findReplace(replace.findReplaceXml(xml), file);
		System.out.println("用时:" + (System.currentTimeMillis() - start));
	}
	
	/**
	 * 生成十六进制转成十进制的资源文件
	 * @param file
	 * @return
	 */
	public File findReplaceXml(File file) {
		FileReader fr = null;
		FileWriter fw = null;
		File fileTemp = new File(file.getParent(), "re"+file.getName());
		try {
			fr = new FileReader(file);
			
			fw = new FileWriter(fileTemp);

			BufferedReader bf = new BufferedReader(fr);
			String str = null;// 取一行
			while ((str = bf.readLine()) != null) { // 一行一行的读取全部内容
				// 显示行号
				int index = str.lastIndexOf("id="0x");
				if (index != -1) {
					index = index + 6;
					String s = str.substring(index, index + 8);
					str = str.replace("0x" + s, hexToDecimal(s));
				}
				fw.write(str);
				fw.write("rn");// 写入换行
			}
			fw.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return fileTemp;
	}
	
	/**
	 * 十六进制转成十进制
	 * @param hexString
	 * @return
	 */
	private static String hexToDecimal(String hexString) {
		BigInteger bi = null;
		bi = new BigInteger(hexString, 16);
		String show = bi.toString(10);
		return show;
	}

	/**
	 * 查找替换
	 * @param xml
	 * @param fileDir
	 */
	public void findReplace(File xml, File fileDir) {
		InputStream inStream = null;
		try {
			initMap(new FileInputStream(xml));
			findFileList(fileDir);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} finally {
			if (inStream != null)
				try {
					inStream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
		}
	}
	
	/**
	 * 正则表达式查找替换
	 */
	private String matcher(String regex) {
		Matcher m = Pattern.compile("[0-9]\d{9}").matcher(regex);
		while (m.find()) {
			String recource = resources.get(m.group());
			if(recource!=null){
				System.out.println(m.group() + ":"+recource);
				regex = regex.replaceAll(m.group(), recource);
			}
		}
		return regex;
	}
	
	/**
	 * 递归遍历目录文件
	 * 
	 * @param file
	 * @param resourceContent
	 * @param replaceContent
	 */
	public void findFileList(File file) {
		File[] files = file.listFiles();
		if (files == null) {
			return;
		}
		for (File f : files) {
			if (f.isDirectory()) {
				findFileList(f);
			} else {
				if (f.getName().endsWith(".java")) {
					transferFile(f); // 查找替换
				}
			}
		}
	}
	/**
	 * 保存到原文件
	 * @param file
	 */
	private void transferFile(File file) {
		try {
			FileReader reader = new FileReader(file);
			char[] dates = new char[1024];
			int count = 0;
			StringBuilder sb = new StringBuilder();
			while ((count = reader.read(dates)) > 0) {
				String str = String.valueOf(dates, 0, count);
				sb.append(str);
			}
			reader.close();
			// 从构造器中生成字符串，并替换搜索文本
			String fileContent = matcher(sb.toString());
			FileWriter writer = new FileWriter(file);
			writer.write(fileContent.toCharArray());
			writer.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 从流中初始化资源集合
	 *  // R.attr.name 2130771968
	 * @param inStream
	 */
	public void initMap(InputStream inStream) {
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		try {
			DocumentBuilder builder = factory.newDocumentBuilder();
			Document dom = builder.parse(inStream);
			Element root = dom.getDocumentElement();
			NodeList items = root.getElementsByTagName("public");// 查找所有person节点
			System.out.println("XML文件中有记录:" + items.getLength());
			for (int i = 0; i < items.getLength(); i++) {
				// 得到public节点
				Element publicNode = (Element) items.item(i);
				resources.put(publicNode.getAttribute("id"), "R." + publicNode.getAttribute("type") + "." + publicNode.getAttribute("name"));
			}
			System.out.println("添加记录："+resources.size());
			inStream.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}