core: fix decoding UTF-8 strings in xml resources

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

@@ -36,13 +36,13 @@ public enum ResourceType {
 			case CODE:
 			case ARSC:
 			case LIB:
-			case XML:
 			case FONT:
 			case IMG:
 			case UNKNOWN:
 				return false;
 
 			case MANIFEST:
+			case XML:
 				return true;
 		}
 		return false;

jadx-core/src/main/java/jadx/core/xmlgen/ParserStream.java

+package jadx.core.xmlgen;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+public class ParserStream {
+
+	private final InputStream input;
+	private long readPos = 0;
+
+	public ParserStream(InputStream inputStream) {
+		this.input = inputStream;
+	}
+
+	public long getPos() {
+		return readPos;
+	}
+
+	public int readInt8() throws IOException {
+		readPos++;
+		return input.read();
+	}
+
+	public int readInt16() throws IOException {
+		readPos += 2;
+		int b1 = input.read();
+		int b2 = input.read();
+		return (b2 & 0xFF) << 8 | (b1 & 0xFF);
+	}
+
+	public int readInt32() throws IOException {
+		readPos += 4;
+		InputStream in = input;
+		int b1 = in.read();
+		int b2 = in.read();
+		int b3 = in.read();
+		int b4 = in.read();
+		return b4 << 24 | (b3 & 0xFF) << 16 | (b2 & 0xFF) << 8 | (b1 & 0xFF);
+	}
+
+	public byte[] readArray(int count) throws IOException {
+		readPos += count;
+		byte[] arr = new byte[count];
+		int pos = input.read(arr, 0, count);
+		while (pos < count) {
+			int read = input.read(arr, pos, count - pos);
+			if (read == -1) {
+				throw new IOException("No data, can't read " + count + " bytes");
+			}
+			pos += read;
+		}
+		return arr;
+	}
+
+	public void skip(long count) throws IOException {
+		readPos += count;
+		long pos = input.skip(count);
+		while (pos < count) {
+			long skipped = input.skip(count - pos);
+			if (skipped == -1) {
+				throw new IOException("No data, can't skip " + count + " bytes");
+			}
+			pos += skipped;
+		}
+	}
+
+	public int decodeLength8() throws IOException {
+		int len = readInt8();
+		if ((len & 0x80) != 0) {
+			len = ((len & 0x7F) << 8) | readInt8();
+		}
+		return len;
+	}
+
+	public int decodeLength16() throws IOException {
+		int len = readInt16();
+		if ((len & 0x8000) != 0) {
+			len = ((len & 0x7FFF) << 16) | readInt16();
+		}
+		return len;
+	}
+}

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

@@ -144,7 +144,6 @@ public class JResource extends JNode implements Comparable<JResource> {
 	private boolean isSupportedForView(ResourceType type) {
 		switch (type) {
 			case CODE:
-			case XML:
 			case ARSC:
 			case FONT:
 			case IMG:
@@ -152,6 +151,7 @@ public class JResource extends JNode implements Comparable<JResource> {
 				return false;
 
 			case MANIFEST:
+			case XML:
 			case UNKNOWN:
 				return true;
 		}