core: rename fields and methods in deobfuscation pass.

jadx-core/src/main/java/jadx/api/JavaField.java

@@ -16,12 +16,12 @@ public final class JavaField implements JavaNode {
 
 	@Override
 	public String getName() {
-		return field.getName();
+		return field.getAlias();
 	}
 
 	@Override
 	public String getFullName() {
-		return parent.getFullName() + "." + field.getName();
+		return parent.getFullName() + "." + getName();
 	}
 
 	@Override

jadx-core/src/main/java/jadx/api/JavaMethod.java

@@ -17,7 +17,7 @@ public final class JavaMethod implements JavaNode {
 
 	@Override
 	public String getName() {
-		return mth.getName();
+		return mth.getAlias();
 	}
 
 	@Override

jadx-core/src/main/java/jadx/core/Jadx.java

@@ -108,9 +108,7 @@ public class Jadx {
 
 			passes.add(new DependencyCollector());
 
-			if (args.isDeobfuscationOn()) {
-				passes.add(new RenameVisitor());
-			}
+			passes.add(new RenameVisitor());
 		}
 		return passes;
 	}

jadx-core/src/main/java/jadx/core/ProcessClass.java

@@ -53,10 +53,6 @@ public final class ProcessClass {
 
 	static void processDependencies(ClassNode cls, List<IDexTreeVisitor> passes) {
 		for (ClassNode depCls : cls.getDependencies()) {
-			if (cls.getTopParentClass() == cls) {
-				// ignore inner classes of this class
-				continue;
-			}
 			process(depCls, passes, null);
 		}
 	}

jadx-core/src/main/java/jadx/core/codegen/ClassGen.java

@@ -337,7 +337,7 @@ public class ClassGen {
 			code.startLine(f.getAccessFlags().makeString());
 			useType(code, f.getType());
 			code.add(' ');
-			code.add(f.getName());
+			code.add(f.getAlias());
 			FieldValueAttr fv = f.get(AType.FIELD_VALUE);
 			if (fv != null) {
 				code.add(" = ");

jadx-core/src/main/java/jadx/core/codegen/InsnGen.java

@@ -157,7 +157,7 @@ public class InsnGen {
 		if (fieldNode != null) {
 			code.attachAnnotation(fieldNode);
 		}
-		code.add(field.getName());
+		code.add(field.getAlias());
 	}
 
 	public static void makeStaticFieldAccess(CodeWriter code, FieldInfo field, ClassGen clsGen) {
@@ -179,7 +179,7 @@ public class InsnGen {
 		if (fieldNode != null) {
 			code.attachAnnotation(fieldNode);
 		}
-		code.add(field.getName());
+		code.add(field.getAlias());
 	}
 
 	protected void staticField(CodeWriter code, FieldInfo field) {
@@ -612,7 +612,7 @@ public class InsnGen {
 		if (callMthNode != null) {
 			code.attachAnnotation(callMthNode);
 		}
-		code.add(callMth.getName());
+		code.add(callMth.getAlias());
 		generateMethodArguments(code, insn, k, callMthNode);
 	}
 

jadx-core/src/main/java/jadx/core/codegen/MethodGen.java

@@ -90,7 +90,7 @@ public class MethodGen {
 		} else {
 			classGen.useType(code, mth.getReturnType());
 			code.add(' ');
-			code.add(mth.getName());
+			code.add(mth.getAlias());
 		}
 		code.add('(');
 

jadx-core/src/main/java/jadx/core/codegen/RegionGen.java

@@ -245,7 +245,7 @@ public class RegionGen extends InsnGen {
 				if (k instanceof FieldNode) {
 					FieldNode fn = (FieldNode) k;
 					if (fn.getParentClass().isEnum()) {
-						code.add(fn.getName());
+						code.add(fn.getAlias());
 					} else {
 						staticField(code, fn.getFieldInfo());
 						// print original value, sometimes replace with incorrect field

jadx-core/src/main/java/jadx/core/deobf/DeobfClsInfo.java

+package jadx.core.deobf;
+
+import jadx.core.dex.nodes.ClassNode;
+
+class DeobfClsInfo {
+	private final Deobfuscator deobfuscator;
+	private final ClassNode cls;
+	private final PackageNode pkg;
+	private final String alias;
+
+	public DeobfClsInfo(Deobfuscator deobfuscator, ClassNode cls, PackageNode pkg, String alias) {
+		this.deobfuscator = deobfuscator;
+		this.cls = cls;
+		this.pkg = pkg;
+		this.alias = alias;
+	}
+
+	public String makeNameWithoutPkg() {
+		String prefix;
+		ClassNode parentClass = cls.getParentClass();
+		if (parentClass != cls) {
+			DeobfClsInfo parentDeobfClsInfo = deobfuscator.getClsMap().get(parentClass.getClassInfo());
+			if (parentDeobfClsInfo != null) {
+				prefix = parentDeobfClsInfo.makeNameWithoutPkg();
+			} else {
+				prefix = deobfuscator.getNameWithoutPackage(parentClass.getClassInfo());
+			}
+			prefix += Deobfuscator.INNER_CLASS_SEPARATOR;
+		} else {
+			prefix = "";
+		}
+		return prefix + (this.alias != null ? this.alias : this.cls.getShortName());
+	}
+
+	public String getFullName() {
+		return pkg.getFullAlias() + Deobfuscator.CLASS_NAME_SEPARATOR + makeNameWithoutPkg();
+	}
+
+	public ClassNode getCls() {
+		return cls;
+	}
+
+	public PackageNode getPkg() {
+		return pkg;
+	}
+
+	public String getAlias() {
+		return alias;
+	}
+}

jadx-core/src/main/java/jadx/core/deobf/DeobfPresets.java

+package jadx.core.deobf;
+
+import jadx.core.dex.info.ClassInfo;
+import jadx.core.dex.info.FieldInfo;
+import jadx.core.dex.info.MethodInfo;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.commons.io.FileUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+class DeobfPresets {
+	private static final Logger LOG = LoggerFactory.getLogger(DeobfPresets.class);
+
+	private static final String MAP_FILE_CHARSET = "UTF-8";
+
+	private final Deobfuscator deobfuscator;
+	private final File deobfMapFile;
+
+	private final Map<String, String> clsPresetMap = new HashMap<String, String>();
+	private final Map<String, String> fldPresetMap = new HashMap<String, String>();
+	private final Map<String, String> mthPresetMap = new HashMap<String, String>();
+
+	public DeobfPresets(Deobfuscator deobfuscator, File deobfMapFile) {
+		this.deobfuscator = deobfuscator;
+		this.deobfMapFile = deobfMapFile;
+	}
+
+	/**
+	 * Loads deobfuscator presets
+	 */
+	public void load() {
+		if (!deobfMapFile.exists()) {
+			return;
+		}
+		LOG.info("Loading obfuscation map from: {}", deobfMapFile.getAbsoluteFile());
+		try {
+			List<String> lines = FileUtils.readLines(deobfMapFile, MAP_FILE_CHARSET);
+			for (String l : lines) {
+				l = l.trim();
+				if (l.isEmpty() || l.startsWith("#")) {
+					continue;
+				}
+				String[] va = splitAndTrim(l);
+				if (va.length != 2) {
+					continue;
+				}
+				String origName = va[0];
+				String alias = va[1];
+				if (l.startsWith("p ")) {
+					deobfuscator.addPackagePreset(origName, alias);
+				} else if (l.startsWith("c ")) {
+					clsPresetMap.put(origName, alias);
+				} else if (l.startsWith("f ")) {
+					fldPresetMap.put(origName, alias);
+				} else if (l.startsWith("m ")) {
+					mthPresetMap.put(origName, alias);
+				}
+			}
+		} catch (IOException e) {
+			LOG.error("Failed to load deobfuscation map file '{}'", deobfMapFile.getAbsolutePath(), e);
+		}
+	}
+
+	private static String[] splitAndTrim(String str) {
+		String[] v = str.substring(2).split("=");
+		for (int i = 0; i < v.length; i++) {
+			v[i] = v[i].trim();
+		}
+		return v;
+	}
+
+	public void save(boolean forceSave) {
+		try {
+			if (deobfMapFile.exists()) {
+				if (forceSave) {
+					dumpMapping();
+				} else {
+					LOG.warn("Deobfuscation map file '{}' exists. Use command line option '--deobf-rewrite-cfg' to rewrite it",
+							deobfMapFile.getAbsolutePath());
+				}
+			} else {
+				dumpMapping();
+			}
+		} catch (IOException e) {
+			LOG.error("Failed to load deobfuscation map file '{}'", deobfMapFile.getAbsolutePath(), e);
+		}
+	}
+
+	/**
+	 * Saves DefaultDeobfuscator presets
+	 */
+	private void dumpMapping() throws IOException {
+		List<String> list = new ArrayList<String>();
+		// packages
+		for (PackageNode p : deobfuscator.getRootPackage().getInnerPackages()) {
+			for (PackageNode pp : p.getInnerPackages()) {
+				dfsPackageName(list, p.getName(), pp);
+			}
+			if (p.hasAlias()) {
+				list.add(String.format("p %s = %s", p.getName(), p.getAlias()));
+			}
+		}
+		// classes
+		for (DeobfClsInfo deobfClsInfo : deobfuscator.getClsMap().values()) {
+			if (deobfClsInfo.getAlias() != null) {
+				list.add(String.format("c %s = %s",
+						deobfClsInfo.getCls().getClassInfo().getFullName(), deobfClsInfo.getAlias()));
+			}
+		}
+		for (FieldInfo fld : deobfuscator.getFldMap().keySet()) {
+			list.add(String.format("f %s = %s", fld.getFullId(), fld.getAlias()));
+		}
+		for (MethodInfo mth : deobfuscator.getMthMap().keySet()) {
+			list.add(String.format("m %s = %s", mth.getFullId(), mth.getAlias()));
+		}
+		Collections.sort(list);
+		FileUtils.writeLines(deobfMapFile, MAP_FILE_CHARSET, list);
+		list.clear();
+	}
+
+	private static void dfsPackageName(List<String> list, String prefix, PackageNode node) {
+		for (PackageNode pp : node.getInnerPackages()) {
+			dfsPackageName(list, prefix + '.' + node.getName(), pp);
+		}
+		if (node.hasAlias()) {
+			list.add(String.format("p %s.%s = %s", prefix, node.getName(), node.getAlias()));
+		}
+	}
+
+	public String getForCls(ClassInfo cls) {
+		return clsPresetMap.get(cls.getFullName());
+	}
+
+	public String getForFld(FieldInfo fld) {
+		return fldPresetMap.get(fld.getFullId());
+	}
+
+	public String getForMth(MethodInfo mth) {
+		return mthPresetMap.get(mth.getFullId());
+	}
+
+	public void clear() {
+		clsPresetMap.clear();
+		fldPresetMap.clear();
+		mthPresetMap.clear();
+	}
+
+	public Map<String, String> getClsPresetMap() {
+		return clsPresetMap;
+	}
+
+	public Map<String, String> getFldPresetMap() {
+		return fldPresetMap;
+	}
+
+	public Map<String, String> getMthPresetMap() {
+		return mthPresetMap;
+	}
+}

jadx-core/src/main/java/jadx/core/deobf/Deobfuscator.java

@@ -4,21 +4,22 @@ import jadx.api.IJadxArgs;
 import jadx.core.dex.attributes.AType;
 import jadx.core.dex.attributes.nodes.SourceFileAttr;
 import jadx.core.dex.info.ClassInfo;
+import jadx.core.dex.info.FieldInfo;
+import jadx.core.dex.info.MethodInfo;
 import jadx.core.dex.nodes.ClassNode;
 import jadx.core.dex.nodes.DexNode;
+import jadx.core.dex.nodes.FieldNode;
+import jadx.core.dex.nodes.MethodNode;
 
 import java.io.File;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.TreeSet;
 
-import org.apache.commons.io.FileUtils;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -27,56 +28,60 @@ public class Deobfuscator {
 
 	private static final boolean DEBUG = false;
 
-	private static final String MAP_FILE_CHARSET = "UTF-8";
-	private static final String CLASS_NAME_SEPARATOR = ".";
-	private static final String INNER_CLASS_SEPARATOR = "$";
+	public static final String CLASS_NAME_SEPARATOR = ".";
+	public static final String INNER_CLASS_SEPARATOR = "$";
 
-	private final Map<ClassInfo, DeobfClsInfo> clsMap = new HashMap<ClassInfo, DeobfClsInfo>();
 	private final IJadxArgs args;
-	private final File deobfMapFile;
 	@NotNull
 	private final List<DexNode> dexNodes;
+	private final DeobfPresets deobfPresets;
+
+	private final Map<ClassInfo, DeobfClsInfo> clsMap = new HashMap<ClassInfo, DeobfClsInfo>();
+	private final Map<FieldInfo, String> fldMap = new HashMap<FieldInfo, String>();
+	private final Map<MethodInfo, String> mthMap = new HashMap<MethodInfo, String>();
+
+	private final PackageNode rootPackage = new PackageNode("");
+	private final Set<String> pkgSet = new TreeSet<String>();
 
 	private final int maxLength;
 	private final int minLength;
 	private int pkgIndex = 0;
 	private int clsIndex = 0;
-
-	private final PackageNode rootPackage = new PackageNode("");
-	private final Set<String> pkgSet = new TreeSet<String>();
-	private Map<String, String> preLoadClsMap = Collections.emptyMap();
+	private int fldIndex = 0;
+	private int mthIndex = 0;
 
 	public Deobfuscator(IJadxArgs args, @NotNull List<DexNode> dexNodes, File deobfMapFile) {
 		this.args = args;
 		this.dexNodes = dexNodes;
-		this.deobfMapFile = deobfMapFile;
 
 		this.minLength = args.getDeobfuscationMinLength();
 		this.maxLength = args.getDeobfuscationMaxLength();
+
+		this.deobfPresets = new DeobfPresets(this, deobfMapFile);
 	}
 
 	public void execute() {
-		if (deobfMapFile.exists() && !args.isDeobfuscationForceSave()) {
-			try {
-				load();
-			} catch (IOException e) {
-				LOG.error("Failed to load deobfuscation map file '{}'", deobfMapFile.getAbsolutePath(), e);
-			}
+		if (!args.isDeobfuscationForceSave()) {
+			deobfPresets.load();
+			initIndexes();
 		}
 		process();
-		try {
-			if (deobfMapFile.exists()) {
-				if (args.isDeobfuscationForceSave()) {
-					save();
-				} else {
-					LOG.warn("Deobfuscation map file '{}' exists. Use command line option '--deobf-rewrite-cfg' to rewrite it",
-							deobfMapFile.getAbsolutePath());
-				}
-			} else {
-				save();
+		deobfPresets.save(args.isDeobfuscationForceSave());
+		clear();
+	}
+
+	private void initIndexes() {
+		pkgIndex = pkgSet.size();
+		clsIndex = deobfPresets.getClsPresetMap().size();
+		fldIndex = deobfPresets.getFldPresetMap().size();
+		mthIndex = deobfPresets.getMthPresetMap().size();
+	}
+
+	private void preProcess() {
+		for (DexNode dexNode : dexNodes) {
+			for (ClassNode cls : dexNode.getClasses()) {
+				doClass(cls);
 			}
-		} catch (IOException e) {
-			LOG.error("Failed to load deobfuscation map file '{}'", deobfMapFile.getAbsolutePath(), e);
 		}
 	}
 
@@ -85,20 +90,47 @@ public class Deobfuscator {
 		if (DEBUG) {
 			dumpAlias();
 		}
-		preLoadClsMap.clear();
-		preLoadClsMap = Collections.emptyMap();
-
 		for (DexNode dexNode : dexNodes) {
-			for (ClassNode classNode : dexNode.getClasses()) {
-				ClassInfo clsInfo = classNode.getClassInfo();
-				String fullName = getClassFullName(clsInfo);
-				if (!fullName.equals(clsInfo.getFullName())) {
-					clsInfo.rename(dexNode, fullName);
-				}
+			for (ClassNode cls : dexNode.getClasses()) {
+				processClass(dexNode, cls);
 			}
 		}
 	}
 
+	void clear() {
+		deobfPresets.clear();
+		clsMap.clear();
+		fldMap.clear();
+		mthMap.clear();
+	}
+
+	private void processClass(DexNode dex, ClassNode cls) {
+		ClassInfo clsInfo = cls.getClassInfo();
+		String fullName = getClassFullName(clsInfo);
+		if (!fullName.equals(clsInfo.getFullName())) {
+			clsInfo.rename(dex, fullName);
+		}
+		for (FieldNode field : cls.getFields()) {
+			FieldInfo fieldInfo = field.getFieldInfo();
+			String alias = getFieldAlias(field);
+			if (alias != null) {
+				fieldInfo.setAlias(alias);
+			}
+		}
+		for (MethodNode mth : cls.getMethods()) {
+			MethodInfo methodInfo = mth.getMethodInfo();
+			String alias = getMethodAlias(mth);
+			if (alias != null) {
+				methodInfo.setAlias(alias);
+			}
+		}
+	}
+
+	public void addPackagePreset(String origPkgName, String pkgAlias) {
+		PackageNode pkg = getPackageNode(origPkgName, true);
+		pkg.setAlias(pkgAlias);
+	}
+
 	/**
 	 * Gets package node for full package name
 	 *
@@ -134,41 +166,7 @@ public class Deobfuscator {
 		return result;
 	}
 
-	private final class DeobfClsInfo {
-		public final ClassNode cls;
-		public final PackageNode pkg;
-		public final String alias;
-
-		public DeobfClsInfo(ClassNode cls, PackageNode pkg, String alias) {
-			this.cls = cls;
-			this.pkg = pkg;
-			this.alias = alias;
-		}
-
-		public String makeNameWithoutPkg() {
-			String prefix;
-			ClassNode parentClass = cls.getParentClass();
-			if (parentClass != cls) {
-				DeobfClsInfo parentDeobfClsInfo = clsMap.get(parentClass.getClassInfo());
-				if (parentDeobfClsInfo != null) {
-					prefix = parentDeobfClsInfo.makeNameWithoutPkg();
-				} else {
-					prefix = getNameWithoutPackage(parentClass.getClassInfo());
-				}
-				prefix += INNER_CLASS_SEPARATOR;
-			} else {
-				prefix = "";
-			}
-
-			return prefix + (this.alias != null ? this.alias : this.cls.getShortName());
-		}
-
-		public String getFullName() {
-			return pkg.getFullAlias() + CLASS_NAME_SEPARATOR + makeNameWithoutPkg();
-		}
-	}
-
-	private String getNameWithoutPackage(ClassInfo clsInfo) {
+	String getNameWithoutPackage(ClassInfo clsInfo) {
 		String prefix;
 		ClassInfo parentClsInfo = clsInfo.getParentClass();
 		if (parentClsInfo != null) {
@@ -191,18 +189,17 @@ public class Deobfuscator {
 		PackageNode pkg = getPackageNode(pkgFullName, true);
 		doPkg(pkg, pkgFullName);
 
-		String fullName = classInfo.getFullName();
-		if (preLoadClsMap.containsKey(fullName)) {
-			String alias = preLoadClsMap.get(fullName);
-			clsMap.put(classInfo, new DeobfClsInfo(cls, pkg, alias));
+		String alias = deobfPresets.getForCls(classInfo);
+		if (alias != null) {
+			clsMap.put(classInfo, new DeobfClsInfo(this, cls, pkg, alias));
 			return;
 		}
 		if (clsMap.containsKey(classInfo)) {
 			return;
 		}
 		if (shouldRename(classInfo.getShortName())) {
-			String alias = makeClsAlias(cls);
-			clsMap.put(classInfo, new DeobfClsInfo(cls, pkg, alias));
+			alias = makeClsAlias(cls);
+			clsMap.put(classInfo, new DeobfClsInfo(this, cls, pkg, alias));
 		}
 	}
 
@@ -224,6 +221,54 @@ public class Deobfuscator {
 		return String.format("C%04d%s", clsIndex++, makeName(clsName));
 	}
 
+	@Nullable
+	public String getFieldAlias(FieldNode field) {
+		FieldInfo fieldInfo = field.getFieldInfo();
+		String alias = fldMap.get(fieldInfo);
+		if (alias != null) {
+			return alias;
+		}
+		alias = deobfPresets.getForFld(fieldInfo);
+		if (alias != null) {
+			fldMap.put(fieldInfo, alias);
+			return alias;
+		}
+		if (shouldRename(field.getName())) {
+			return makeFieldAlias(field);
+		}
+		return null;
+	}
+
+	@Nullable
+	public String getMethodAlias(MethodNode mth) {
+		MethodInfo methodInfo = mth.getMethodInfo();
+		String alias = mthMap.get(methodInfo);
+		if (alias != null) {
+			return alias;
+		}
+		alias = deobfPresets.getForMth(methodInfo);
+		if (alias != null) {
+			mthMap.put(methodInfo, alias);
+			return alias;
+		}
+		if (shouldRename(mth.getName())) {
+			return makeMethodAlias(mth);
+		}
+		return null;
+	}
+
+	public String makeFieldAlias(FieldNode field) {
+		String alias = String.format("f%d%s", fldIndex++, makeName(field.getName()));
+		fldMap.put(field.getFieldInfo(), alias);
+		return alias;
+	}
+
+	public String makeMethodAlias(MethodNode mth) {
+		String alias = String.format("m%d%s", mthIndex++, makeName(mth.getName()));
+		mthMap.put(mth.getMethodInfo(), alias);
+		return alias;
+	}
+
 	private void doPkg(PackageNode pkg, String fullName) {
 		if (pkgSet.contains(fullName)) {
 			return;
@@ -246,14 +291,6 @@ public class Deobfuscator {
 		}
 	}
 
-	private void preProcess() {
-		for (DexNode dexNode : dexNodes) {
-			for (ClassNode cls : dexNode.getClasses()) {
-				doClass(cls);
-			}
-		}
-	}
-
 	private boolean shouldRename(String s) {
 		return s.length() > maxLength
 				|| s.length() < minLength
@@ -305,80 +342,6 @@ public class Deobfuscator {
 		}
 	}
 
-	/**
-	 * Loads deobfuscator presets
-	 *
-	 * @throws IOException
-	 */
-	private void load() throws IOException {
-		if (!deobfMapFile.exists()) {
-			return;
-		}
-		LOG.info("Loading obfuscation map from: {}", deobfMapFile.getAbsoluteFile());
-		List<String> lines = FileUtils.readLines(deobfMapFile, MAP_FILE_CHARSET);
-		for (String l : lines) {
-			l = l.trim();
-			if (l.startsWith("p ")) {
-				String[] va = splitAndTrim(l);
-				if (va.length == 2) {
-					PackageNode pkg = getPackageNode(va[0], true);
-					pkg.setAlias(va[1]);
-				}
-			} else if (l.startsWith("c ")) {
-				String[] va = splitAndTrim(l);
-				if (va.length == 2) {
-					if (preLoadClsMap.isEmpty()) {
-						preLoadClsMap = new HashMap<String, String>();
-					}
-					preLoadClsMap.put(va[0], va[1]);
-				}
-			}
-		}
-	}
-
-	private static String[] splitAndTrim(String str) {
-		String[] v = str.substring(2).split("=");
-		for (int i = 0; i < v.length; i++) {
-			v[i] = v[i].trim();
-		}
-		return v;
-	}
-
-	private static void dfsPackageName(List<String> list, String prefix, PackageNode node) {
-		for (PackageNode pp : node.getInnerPackages()) {
-			dfsPackageName(list, prefix + '.' + node.getName(), pp);
-		}
-		if (node.hasAlias()) {
-			list.add(String.format("p %s.%s=%s", prefix, node.getName(), node.getAlias()));
-		}
-	}
-
-	/**
-	 * Saves DefaultDeobfuscator presets
-	 */
-	private void save() throws IOException {
-		List<String> list = new ArrayList<String>();
-		// packages
-		for (PackageNode p : rootPackage.getInnerPackages()) {
-			for (PackageNode pp : p.getInnerPackages()) {
-				dfsPackageName(list, p.getName(), pp);
-			}
-			if (p.hasAlias()) {
-				list.add(String.format("p %s=%s", p.getName(), p.getAlias()));
-			}
-		}
-		// classes
-		for (DeobfClsInfo deobfClsInfo : clsMap.values()) {
-			if (deobfClsInfo.alias != null) {
-				list.add(String.format("c %s=%s",
-						deobfClsInfo.cls.getClassInfo().getFullName(), deobfClsInfo.alias));
-			}
-		}
-		Collections.sort(list);
-		FileUtils.writeLines(deobfMapFile, MAP_FILE_CHARSET, list);
-		list.clear();
-	}
-
 	private String getPackageName(String packageName) {
 		final PackageNode pkg = getPackageNode(packageName, false);
 		if (pkg != null) {
@@ -406,4 +369,20 @@ public class Deobfuscator {
 		}
 		return getPackageName(clsInfo.getPackage()) + CLASS_NAME_SEPARATOR + getClassName(clsInfo);
 	}
+
+	public Map<ClassInfo, DeobfClsInfo> getClsMap() {
+		return clsMap;
+	}
+
+	public Map<FieldInfo, String> getFldMap() {
+		return fldMap;
+	}
+
+	public Map<MethodInfo, String> getMthMap() {
+		return mthMap;
+	}
+
+	public PackageNode getRootPackage() {
+		return rootPackage;
+	}
 }

jadx-core/src/main/java/jadx/core/deobf/NameMapper.java

@@ -88,10 +88,11 @@ public class NameMapper {
 	}
 
 	public static boolean isAllCharsPrintable(String str) {
-		for (int i = 0; i < str.length(); i++) {
-			 if (!isPrintableChar(str.charAt(i))) {
-				 return false;
-			 }
+		int len = str.length();
+		for (int i = 0; i < len; i++) {
+			if (!isPrintableChar(str.charAt(i))) {
+				return false;
+			}
 		}
 		return true;
 	}

jadx-core/src/main/java/jadx/core/deobf/PackageNode.java

@@ -7,11 +7,11 @@ import java.util.Stack;
 
 public class PackageNode {
 
+	private static final char SEPARATOR_CHAR = '.';
+
 	private PackageNode parentPackage;
 	private List<PackageNode> innerPackages = Collections.emptyList();
 
-	private static final char separatorChar = '.';
-
 	private final String packageName;
 	private String packageAlias;
 
@@ -34,7 +34,7 @@ public class PackageNode {
 			StringBuilder result = new StringBuilder();
 			result.append(pp.pop().getName());
 			while (pp.size() > 0) {
-				result.append(separatorChar);
+				result.append(SEPARATOR_CHAR);
 				result.append(pp.pop().getName());
 			}
 			cachedPackageFullName = result.toString();
@@ -63,7 +63,7 @@ public class PackageNode {
 			StringBuilder result = new StringBuilder();
 			result.append(pp.pop().getAlias());
 			while (pp.size() > 0) {
-				result.append(separatorChar);
+				result.append(SEPARATOR_CHAR);
 				result.append(pp.pop().getAlias());
 			}
 			cachedPackageFullAlias = result.toString();

jadx-core/src/main/java/jadx/core/dex/info/FieldInfo.java

 package jadx.core.dex.info;
 
+import jadx.core.codegen.TypeGen;
 import jadx.core.dex.instructions.args.ArgType;
 import jadx.core.dex.nodes.DexNode;
 
@@ -10,11 +11,13 @@ public final class FieldInfo {
 	private final ClassInfo declClass;
 	private final String name;
 	private final ArgType type;
+	private String alias;
 
 	private FieldInfo(ClassInfo declClass, String name, ArgType type) {
 		this.declClass = declClass;
 		this.name = name;
 		this.type = type;
+		this.alias = name;
 	}
 
 	public static FieldInfo from(DexNode dex, ClassInfo declClass, String name, ArgType type) {
@@ -42,6 +45,22 @@ public final class FieldInfo {
 		return declClass;
 	}
 
+	public String getAlias() {
+		return alias;
+	}
+
+	public void setAlias(String alias) {
+		this.alias = alias;
+	}
+
+	public String getFullId() {
+		return declClass.getFullName() + "." + name + ":" + TypeGen.signature(type);
+	}
+
+	public boolean isRenamed() {
+		return !name.equals(alias);
+	}
+
 	@Override
 	public boolean equals(Object o) {
 		if (this == o) {

jadx-core/src/main/java/jadx/core/dex/info/MethodInfo.java

@@ -17,10 +17,12 @@ public final class MethodInfo {
 	private final List<ArgType> args;
 	private final ClassInfo declClass;
 	private final String shortId;
+	private String alias;
 
 	private MethodInfo(DexNode dex, int mthIndex) {
 		MethodId mthId = dex.getMethodId(mthIndex);
 		name = dex.getString(mthId.getNameIndex());
+		alias = name;
 		declClass = ClassInfo.fromDex(dex, mthId.getDeclaringClassIndex());
 
 		ProtoId proto = dex.getProtoId(mthId.getProtoIndex());
@@ -91,6 +93,18 @@ public final class MethodInfo {
 		return name.equals("<clinit>");
 	}
 
+	public String getAlias() {
+		return alias;
+	}
+
+	public void setAlias(String alias) {
+		this.alias = alias;
+	}
+
+	public boolean isRenamed() {
+		return !name.equals(alias);
+	}
+
 	@Override
 	public int hashCode() {
 		int result = declClass.hashCode();

jadx-core/src/main/java/jadx/core/dex/nodes/FieldNode.java

@@ -42,6 +42,10 @@ public class FieldNode extends LineAttrNode {
 		return fieldInfo.getName();
 	}
 
+	public String getAlias() {
+		return fieldInfo.getAlias();
+	}
+
 	public ArgType getType() {
 		return type;
 	}

jadx-core/src/main/java/jadx/core/dex/nodes/MethodNode.java

@@ -369,6 +369,10 @@ public class MethodNode extends LineAttrNode implements ILoadable {
 		return mthInfo.getName();
 	}
 
+	public String getAlias() {
+		return mthInfo.getAlias();
+	}
+
 	public ClassNode getParentClass() {
 		return parentClass;
 	}

jadx-core/src/main/java/jadx/core/dex/visitors/DependencyCollector.java

@@ -2,6 +2,9 @@ package jadx.core.dex.visitors;
 
 import jadx.core.dex.attributes.AType;
 import jadx.core.dex.info.ClassInfo;
+import jadx.core.dex.info.FieldInfo;
+import jadx.core.dex.instructions.IndexInsnNode;
+import jadx.core.dex.instructions.InvokeNode;
 import jadx.core.dex.instructions.args.ArgType;
 import jadx.core.dex.instructions.args.InsnArg;
 import jadx.core.dex.instructions.args.InsnWrapArg;
@@ -73,6 +76,21 @@ public class DependencyCollector extends AbstractVisitor {
 				addDep(dex, depList, arg.getType());
 			}
 		}
+		processCustomInsn(dex, depList, insnNode);
+	}
+
+	private static void processCustomInsn(DexNode dex, Set<ClassNode> depList, InsnNode insn) {
+		if (insn instanceof IndexInsnNode) {
+			Object index = ((IndexInsnNode) insn).getIndex();
+			if (index instanceof FieldInfo) {
+				addDep(dex, depList, ((FieldInfo) index).getDeclClass());
+			} else if (index instanceof ArgType) {
+				addDep(dex, depList, (ArgType) index);
+			}
+		} else if (insn instanceof InvokeNode) {
+			ClassInfo declClass = ((InvokeNode) insn).getCallMth().getDeclClass();
+			addDep(dex, depList, declClass);
+		}
 	}
 
 	private static void addDep(DexNode dex, Set<ClassNode> depList, ArgType type) {
@@ -94,15 +112,14 @@ public class DependencyCollector extends AbstractVisitor {
 	private static void addDep(DexNode dex, Set<ClassNode> depList, ClassInfo clsInfo) {
 		if (clsInfo != null) {
 			ClassNode node = dex.resolveClass(clsInfo);
-			if (node != null) {
-				depList.add(node);
-			}
+			addDep(dex, depList, node);
 		}
 	}
 
 	private static void addDep(DexNode dex, Set<ClassNode> depList, ClassNode clsNode) {
 		if (clsNode != null) {
-			depList.add(clsNode);
+			// add only top classes
+			depList.add(clsNode.getTopParentClass());
 		}
 	}
 }

jadx-core/src/main/java/jadx/core/dex/visitors/RenameVisitor.java

 package jadx.core.dex.visitors;
 
+import jadx.api.IJadxArgs;
+import jadx.core.codegen.TypeGen;
 import jadx.core.deobf.Deobfuscator;
+import jadx.core.dex.attributes.AFlag;
+import jadx.core.dex.info.FieldInfo;
+import jadx.core.dex.info.MethodInfo;
+import jadx.core.dex.instructions.args.ArgType;
 import jadx.core.dex.nodes.ClassNode;
+import jadx.core.dex.nodes.FieldNode;
+import jadx.core.dex.nodes.MethodNode;
 import jadx.core.dex.nodes.RootNode;
 import jadx.core.utils.exceptions.JadxException;
 
 import java.io.File;
+import java.util.HashSet;
+import java.util.Set;
 
-import org.apache.commons.io.FilenameUtils;
+import org.jetbrains.annotations.NotNull;
 
 public class RenameVisitor extends AbstractVisitor {
 
+	@NotNull
 	private Deobfuscator deobfuscator;
 
 	@Override
 	public void init(RootNode root) {
-		String firstInputFileName = root.getDexNodes().get(0).getInputFile().getFile().getAbsolutePath();
-		String inputPath = FilenameUtils.getFullPathNoEndSeparator(firstInputFileName);
-		String inputName = FilenameUtils.getBaseName(firstInputFileName);
-
-		File deobfMapFile = new File(inputPath, inputName + ".jobf");
-		deobfuscator = new Deobfuscator(root.getArgs(), root.getDexNodes(), deobfMapFile);
-		// TODO: check classes for case sensitive names (issue #24)
-		// TODO: sometimes can be used source file name from 'SourceFileAttr'
-		deobfuscator.execute();
+		IJadxArgs args = root.getArgs();
+		File deobfMapFile = new File(args.getOutDir(), "deobf_map.jobf");
+		deobfuscator = new Deobfuscator(args, root.getDexNodes(), deobfMapFile);
+		if (args.isDeobfuscationOn()) {
+			// TODO: check classes for case sensitive names (issue #24)
+			deobfuscator.execute();
+		}
 	}
 
 	@Override
 	public boolean visit(ClassNode cls) throws JadxException {
-		// TODO: rename fields and methods
+		checkFields(cls);
+		checkMethods(cls);
+		for (ClassNode inner : cls.getInnerClasses()) {
+			visit(inner);
+		}
 		return false;
 	}
+
+	private void checkFields(ClassNode cls) {
+		Set<String> names = new HashSet<String>();
+		for (FieldNode field : cls.getFields()) {
+			FieldInfo fieldInfo = field.getFieldInfo();
+			if (!names.add(fieldInfo.getAlias())) {
+				fieldInfo.setAlias(deobfuscator.makeFieldAlias(field));
+			}
+		}
+	}
+
+	private void checkMethods(ClassNode cls) {
+		Set<String> names = new HashSet<String>();
+		for (MethodNode mth : cls.getMethods()) {
+			if (mth.contains(AFlag.DONT_GENERATE)) {
+				continue;
+			}
+			MethodInfo methodInfo = mth.getMethodInfo();
+			String signature = makeMethodSignature(methodInfo);
+			if (!names.add(signature)) {
+				methodInfo.setAlias(deobfuscator.makeMethodAlias(mth));
+			}
+		}
+	}
+
+	private static String makeMethodSignature(MethodInfo methodInfo) {
+		StringBuilder signature = new StringBuilder();
+		signature.append(methodInfo.getAlias());
+		signature.append('(');
+		for (ArgType arg : methodInfo.getArgumentsTypes()) {
+			signature.append(TypeGen.signature(arg));
+		}
+		signature.append(')');
+		return signature.toString();
+	}
 }