skip jar compression & decompression when decoding resources, run apktool on multiple thread

Author: oraveczandrew

pom.xml

@@ -14,7 +14,7 @@
 
         <!-- Dependency versions -->
         <annotations.version>24.1.0</annotations.version>
-        <apktool.version>2.9.3</apktool.version>
+        <apktool.version>2.11.0</apktool.version>
         <asm.version>9.7</asm.version>
         <bined.version>0.2.1</bined.version>
         <byteanalysis.version>1.0bcv</byteanalysis.version>

src/main/java/the/bytecode/club/bytecodeviewer/resources/importing/impl/APKResourceImporter.java

@@ -48,9 +48,8 @@ public void open(File file) throws Exception
         // APK Resource Decoding Here
         if (BytecodeViewer.viewer.decodeAPKResources.isSelected())
         {
-            File decodedResources = new File(TEMP_DIRECTORY + FS + MiscUtils.randomString(32) + ".apk");
-            APKTool.decodeResources(tempCopy, decodedResources, container);
-            container.resourceFiles = JarUtils.loadResources(decodedResources);
+            APKTool.decodeResources(tempCopy, container);
+            container.resourceFiles = JarUtils.loadResourcesFromFolder(APKTool.DECODED_RESOURCES, container.APKToolContents);
         }
 
         container.resourceFiles.putAll(JarUtils.loadResources(tempCopy)); // copy and rename

src/main/java/the/bytecode/club/bytecodeviewer/util/APKTool.java

@@ -32,28 +32,28 @@
  */
 public class APKTool
 {
+    public static final String DECODED_RESOURCES = "Decoded Resources";
 
-    public static synchronized void decodeResources(File input, File output, ResourceContainer container)
+
+    public static synchronized void decodeResources(File input, ResourceContainer container)
     {
         try
         {
-            File dir = new File(TEMP_DIRECTORY + FS + MiscUtils.randomString(32) + FS + "Decoded Resources");
+            File dir = new File(TEMP_DIRECTORY + FS + MiscUtils.randomString(32) + FS + DECODED_RESOURCES);
             dir.mkdirs();
 
             File tempAPKPath = new File(TEMP_DIRECTORY + FS + MiscUtils.randomString(12));
             tempAPKPath.mkdirs();
 
-            brut.apktool.Main.main(new String[]{"r",
+            brut.apktool.Main.main(new String[] {
+                "r",
                 "--frame-path", tempAPKPath.getAbsolutePath(),
                 "d", input.getAbsolutePath(),
                 "-o", dir.getAbsolutePath(),
-                "-f"});
-
-            File zip = new File(TEMP_DIRECTORY + FS + MiscUtils.randomString(12) + ".zip");
-            ZipUtils.zipFolderAPKTool(dir.getAbsolutePath(), zip.getAbsolutePath());
-
-            if (zip.exists())
-                zip.renameTo(output);
+                "-f",
+                "-jobs",
+                String.valueOf(Runtime.getRuntime().availableProcessors())
+            });
 
             container.APKToolContents = dir;
             tempAPKPath.delete();

src/main/java/the/bytecode/club/bytecodeviewer/util/JarUtils.java

@@ -230,6 +230,49 @@ public static List<ClassNode> loadClasses(File jarFile) throws IOException
         return classes;
     }
 
+    /**
+     * Loads resources only, just for .APK
+     *
+     * @param resourcesFolder the input resources folder
+     * @throws IOException
+     */
+    public static Map<String, byte[]> loadResourcesFromFolder(String pathPrefix, File resourcesFolder) throws IOException
+    {
+        if (!resourcesFolder.exists())
+            return new LinkedHashMap<>(); // just ignore (don't return null for null-safety!)
+
+        Map<String, byte[]> files = new LinkedHashMap<>();
+
+        String rootPath = resourcesFolder.getAbsolutePath();
+        loadResourcesFromFolderImpl(rootPath, pathPrefix, files, resourcesFolder);
+
+        return files;
+    }
+
+    private static void loadResourcesFromFolderImpl(String rootPath, String pathPrefix, Map<String, byte[]> files, File folder) throws IOException
+    {
+        for (File file : folder.listFiles())
+        {
+            if (file.isDirectory())
+                loadResourcesFromFolderImpl(rootPath, pathPrefix, files, file);
+            else
+            {
+                final String name = file.getName();
+                if (!name.endsWith(".class") && !name.endsWith(".dex"))
+                {
+                    String relativePath = pathPrefix + file.getAbsolutePath().substring(rootPath.length());
+                    try (InputStream in = new FileInputStream(file))
+                    {
+                        files.put(relativePath, MiscUtils.getBytes(in));
+                    } catch (Exception e)
+                    {
+                        BytecodeViewer.handleException(e);
+                    }
+                }
+            }
+        }
+    }
+
     /**
      * Loads resources only, just for .APK
      *