core: fix imports for inner classes

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

@@ -462,13 +462,14 @@ public class ClassGen {
 		if (fallback) {
 			return fullName;
 		}
-		fullName = extClsInfo.getFullName();
 		String shortName = extClsInfo.getShortName();
 		if (extClsInfo.getPackage().equals("java.lang") && extClsInfo.getParentClass() == null) {
 			return shortName;
-		} else {
-			// don't add import if this class inner for current class
-			if (isClassInnerFor(extClsInfo, useCls)) {
+		}
+		if (isClassInnerFor(useCls, extClsInfo)) {
+			return shortName;
+		}
+		if (isBothClassesInOneTopClass(useCls, extClsInfo)) {
 			return shortName;
 		}
 		// don't add import if this class from same package
@@ -500,7 +501,6 @@ public class ClassGen {
 		addImport(extClsInfo);
 		return shortName;
 	}
-	}
 
 	private void addImport(ClassInfo classInfo) {
 		if (parentGen != null) {
@@ -518,6 +518,16 @@ public class ClassGen {
 		}
 	}
 
+	private static boolean isBothClassesInOneTopClass(ClassInfo useCls, ClassInfo extClsInfo) {
+		ClassInfo a = useCls.getTopParentClass();
+		ClassInfo b = extClsInfo.getTopParentClass();
+		if (a != null) {
+			return a.equals(b);
+		}
+		// useCls - is a top class
+		return useCls.equals(b);
+	}
+
 	private static boolean isClassInnerFor(ClassInfo inner, ClassInfo parent) {
 		if (inner.isInner()) {
 			ClassInfo p = inner.getParentClass();

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

@@ -95,12 +95,13 @@ public final class ClassInfo {
 			parentClass = null;
 		}
 		this.name = clsName;
-		this.fullName = makeFullClsName(clsName);
+		this.fullName = makeFullClsName(clsName, false);
 	}
 
-	public String makeFullClsName(String shortName) {
+	public String makeFullClsName(String shortName, boolean raw) {
 		if (parentClass != null) {
-			return parentClass.fullName + "." + shortName;
+			String innerSep = raw ? "$" : ".";
+			return parentClass.makeFullClsName(parentClass.getShortName(), raw) + innerSep + shortName;
 		}
 		return pkg.isEmpty() ? shortName : pkg + "." + shortName;
 	}

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

@@ -32,12 +32,11 @@ public class RenameVisitor extends AbstractVisitor {
 		if (deobfuscationOn) {
 			// TODO: check classes for case sensitive names (issue #24)
 			deobfuscator.execute();
-		} else {
+		}
 		for (ClassNode classNode : root.getClasses(true)) {
 			checkClassName(classNode);
 		}
 	}
-	}
 
 	@Override
 	public boolean visit(ClassNode cls) throws JadxException {
@@ -60,7 +59,7 @@ public class RenameVisitor extends AbstractVisitor {
 			newShortName = "C" + clsName;
 		}
 		if (newShortName != null) {
-			classInfo.rename(cls.dex(), classInfo.makeFullClsName(newShortName));
+			classInfo.rename(cls.dex(), classInfo.makeFullClsName(newShortName, true));
 		}
 	}
 

jadx-core/src/test/java/jadx/tests/integration/inner/TestAnonymousClass2.java

@@ -3,7 +3,6 @@ package jadx.tests.integration.inner;
 import jadx.core.dex.nodes.ClassNode;
 import jadx.tests.api.IntegrationTest;
 
-import org.junit.Ignore;
 import org.junit.Test;
 
 import static org.hamcrest.CoreMatchers.containsString;
@@ -48,7 +47,6 @@ public class TestAnonymousClass2 extends IntegrationTest {
 	}
 
 	@Test
-	@Ignore
 	public void test() {
 		ClassNode cls = getClassNode(TestCls.class);
 		String code = cls.getCode().toString();

jadx-core/src/test/java/jadx/tests/integration/inner/TestAnonymousClass4.java

@@ -3,7 +3,6 @@ package jadx.tests.integration.inner;
 import jadx.core.dex.nodes.ClassNode;
 import jadx.tests.api.IntegrationTest;
 
-import org.junit.Ignore;
 import org.junit.Test;
 
 import static jadx.tests.api.utils.JadxMatchers.containsOne;
@@ -33,7 +32,6 @@ public class TestAnonymousClass4 extends IntegrationTest {
 	}
 
 	@Test
-	@Ignore
 	public void test() {
 		ClassNode cls = getClassNode(TestCls.class);
 		String code = cls.getCode().toString();