fix: improve resource type detection and remove deprecated method

jadx-gui/src/main/java/jadx/gui/JadxWrapper.java

@@ -143,11 +143,6 @@ public class JadxWrapper {
 		return decompiler.getResources();
 	}
 
-	@Deprecated
-	public File getOpenFile() {
-		return openPaths.get(0).toFile();
-	}
-
 	public List<Path> getOpenPaths() {
 		return openPaths;
 	}

jadx-gui/src/main/java/jadx/gui/treemodel/ApkSignature.java

@@ -15,6 +15,8 @@ import org.slf4j.LoggerFactory;
 
 import com.android.apksig.ApkVerifier;
 
+import jadx.api.ResourceFile;
+import jadx.api.ResourceType;
 import jadx.gui.JadxWrapper;
 import jadx.gui.utils.CertificateManager;
 import jadx.gui.utils.NLS;
@@ -33,11 +35,20 @@ public class ApkSignature extends JNode {
 	public static ApkSignature getApkSignature(JadxWrapper wrapper) {
 		// Only show the ApkSignature node if an AndroidManifest.xml is present.
 		// Without a manifest the Google ApkVerifier refuses to work.
-		if (wrapper.getResources().stream().noneMatch(r -> "AndroidManifest.xml".equals(r.getOriginalName()))) {
+		File apkFile = null;
+		for (ResourceFile resFile : wrapper.getResources()) {
+			if (resFile.getType() == ResourceType.MANIFEST) {
+				ResourceFile.ZipRef zipRef = resFile.getZipRef();
+				if (zipRef != null) {
+					apkFile = zipRef.getZipFile();
+					break;
+				}
+			}
+		}
+		if (apkFile == null) {
 			return null;
 		}
-		File openFile = wrapper.getOpenFile();
-		return new ApkSignature(openFile);
+		return new ApkSignature(apkFile);
 	}
 
 	public ApkSignature(File openFile) {