diff --git a/src/main/java/com/reandroid/lib/apk/StringPoolBuilder.java b/src/main/java/com/reandroid/lib/apk/StringPoolBuilder.java
index 457434a..db08600 100644
--- a/src/main/java/com/reandroid/lib/apk/StringPoolBuilder.java
+++ b/src/main/java/com/reandroid/lib/apk/StringPoolBuilder.java
@@ -31,9 +31,9 @@ import java.io.IOException;
 import java.util.*;
 
 public class StringPoolBuilder {
-    private final Map<Byte, Set<String>> mSpecNameMap;
+    private final Map<Integer, Set<String>> mSpecNameMap;
     private final Set<String> mTableStrings;
-    private byte mCurrentPackageId;
+    private int mCurrentPackageId;
     private JSONArray mStyledStrings;
     public StringPoolBuilder(){
         this.mSpecNameMap = new HashMap<>();
@@ -41,7 +41,7 @@ public class StringPoolBuilder {
     }
     public void apply(TableBlock tableBlock){
         applyTableString(tableBlock.getTableStringPool());
-        for(byte pkgId:mSpecNameMap.keySet()){
+        for(int pkgId:mSpecNameMap.keySet()){
             PackageBlock packageBlock=tableBlock.getPackageArray().getOrCreate(pkgId);
             applySpecString(packageBlock.getSpecStringPool());
         }
@@ -52,7 +52,7 @@ public class StringPoolBuilder {
         stringPool.refresh();
     }
     private void applySpecString(SpecStringPool stringPool){
-        byte pkgId= (byte) stringPool.getPackageBlock().getId();
+        int pkgId = stringPool.getPackageBlock().getId();
         stringPool.addStrings(getSpecString(pkgId));
         stringPool.refresh();
     }
@@ -86,7 +86,7 @@ public class StringPoolBuilder {
     public Set<String> getTableString(){
         return mTableStrings;
     }
-    public Set<String> getSpecString(byte pkgId){
+    public Set<String> getSpecString(int pkgId){
         return mSpecNameMap.get(pkgId);
     }
     private void scan(JSONObject jsonObject){
@@ -100,7 +100,7 @@ public class StringPoolBuilder {
             }
             return;
         }else if(jsonObject.has(PackageBlock.NAME_package_id)){
-            mCurrentPackageId= (byte) jsonObject.getInt(PackageBlock.NAME_package_id);
+            mCurrentPackageId = jsonObject.getInt(PackageBlock.NAME_package_id);
         }
         Set<String> keyList = jsonObject.keySet();
         for(String key:keyList){
@@ -143,7 +143,7 @@ public class StringPoolBuilder {
         if(name==null){
             return;
         }
-        byte pkgId=mCurrentPackageId;
+        int pkgId=mCurrentPackageId;
         if(pkgId==0){
             throw new IllegalArgumentException("Current package id is 0");
         }
diff --git a/src/main/java/com/reandroid/lib/apk/TableBlockJsonBuilder.java b/src/main/java/com/reandroid/lib/apk/TableBlockJsonBuilder.java
index 2b76b90..89f32c0 100644
--- a/src/main/java/com/reandroid/lib/apk/TableBlockJsonBuilder.java
+++ b/src/main/java/com/reandroid/lib/apk/TableBlockJsonBuilder.java
@@ -58,10 +58,9 @@ public class TableBlockJsonBuilder {
         }
         FileInputStream inputStream=new FileInputStream(pkgFile);
         JSONObject jsonObject=new JSONObject(inputStream);
-        int id = jsonObject.getInt(PackageBlock.NAME_package_id);
-        String name=jsonObject.optString(PackageBlock.NAME_package_name);
-        PackageBlock pkg=tableBlock.getPackageArray().getOrCreate((byte) id);
-        pkg.setName(name);
+        PackageBlock pkg=tableBlock.getPackageArray()
+                .getOrCreate(jsonObject.getInt(PackageBlock.NAME_package_id));
+        pkg.setName(jsonObject.optString(PackageBlock.NAME_package_name));
         if(jsonObject.has(PackageBlock.NAME_staged_aliases)){
             JSONArray stagedJson = jsonObject.getJSONArray(PackageBlock.NAME_staged_aliases);
             StagedAlias stagedAlias = new StagedAlias();
@@ -78,11 +77,12 @@ public class TableBlockJsonBuilder {
     private void loadType(PackageBlock packageBlock, File typeJsonFile) throws IOException{
         FileInputStream inputStream=new FileInputStream(typeJsonFile);
         JSONObject jsonObject=new JSONObject(inputStream);
-        int id= jsonObject.getInt("id");
+        // TODO: change json names to use from static field
         JSONObject configObj=jsonObject.getJSONObject("config");
         ResConfig resConfig=new ResConfig();
         resConfig.fromJson(configObj);
-        TypeBlock typeBlock=packageBlock.getSpecTypePairArray().getOrCreate((byte) id, resConfig);
+        TypeBlock typeBlock=packageBlock.getSpecTypePairArray()
+                .getOrCreate(((byte)(0xff & jsonObject.getInt("id"))), resConfig);
         typeBlock.fromJson(jsonObject);
     }
 }
diff --git a/src/main/java/com/reandroid/lib/arsc/array/PackageArray.java b/src/main/java/com/reandroid/lib/arsc/array/PackageArray.java
index f7bb1e0..63f6f8a 100755
--- a/src/main/java/com/reandroid/lib/arsc/array/PackageArray.java
+++ b/src/main/java/com/reandroid/lib/arsc/array/PackageArray.java
@@ -43,6 +43,9 @@ public class PackageArray extends BlockArray<PackageBlock>
         sort(this);
     }
     public PackageBlock getOrCreate(byte pkgId){
+        return getOrCreate(0xff & pkgId);
+    }
+    public PackageBlock getOrCreate(int pkgId){
         PackageBlock packageBlock=getPackageBlockById(pkgId);
         if(packageBlock!=null){
             return packageBlock;
@@ -53,6 +56,9 @@ public class PackageArray extends BlockArray<PackageBlock>
         return packageBlock;
     }
     public PackageBlock getPackageBlockById(byte pkgId){
+        return getPackageBlockById(0xff & pkgId);
+    }
+    public PackageBlock getPackageBlockById(int pkgId){
         Iterator<PackageBlock> itr=iterator(true);
         while (itr.hasNext()){
             PackageBlock packageBlock=itr.next();
diff --git a/src/main/java/com/reandroid/lib/arsc/chunk/PackageBlock.java b/src/main/java/com/reandroid/lib/arsc/chunk/PackageBlock.java
index 58e0d1a..0bda698 100755
--- a/src/main/java/com/reandroid/lib/arsc/chunk/PackageBlock.java
+++ b/src/main/java/com/reandroid/lib/arsc/chunk/PackageBlock.java
@@ -156,6 +156,9 @@ package com.reandroid.lib.arsc.chunk;
     public int getId(){
         return mPackageId.get();
     }
+     public void setId(byte id){
+         setId(0xff & id);
+     }
     public void setId(int id){
         mPackageId.set(id);
     }
diff --git a/src/main/java/com/reandroid/lib/arsc/chunk/TableBlock.java b/src/main/java/com/reandroid/lib/arsc/chunk/TableBlock.java
index 32130c3..c8684f9 100755
--- a/src/main/java/com/reandroid/lib/arsc/chunk/TableBlock.java
+++ b/src/main/java/com/reandroid/lib/arsc/chunk/TableBlock.java
@@ -54,7 +54,7 @@ public class TableBlock extends BaseChunk implements JSONConvert<JSONObject> {
     public TableStringPool getTableStringPool(){
         return mTableStringPool;
     }
-    public PackageBlock getPackageBlockById(byte pkgId){
+    public PackageBlock getPackageBlockById(int pkgId){
         return getPackageArray().getPackageBlockById(pkgId);
     }
     public PackageArray getPackageArray(){
@@ -112,7 +112,7 @@ public class TableBlock extends BaseChunk implements JSONConvert<JSONObject> {
         }
         int pkgId=resourceId>>24;
         pkgId=pkgId&0xff;
-        PackageBlock packageBlock=getPackageBlockById((byte) pkgId);
+        PackageBlock packageBlock=getPackageBlockById(pkgId);
         if(packageBlock!=null){
             EntryGroup entryGroup=packageBlock.getEntryGroup(resourceId);
             if(entryGroup!=null){
diff --git a/src/main/java/com/reandroid/lib/common/TableEntryStore.java b/src/main/java/com/reandroid/lib/common/TableEntryStore.java
index 23777e7..5f93257 100755
--- a/src/main/java/com/reandroid/lib/common/TableEntryStore.java
+++ b/src/main/java/com/reandroid/lib/common/TableEntryStore.java
@@ -24,7 +24,7 @@ import com.reandroid.lib.arsc.value.EntryBlock;
 import java.util.*;
 
 public class TableEntryStore implements EntryStore{
-    private final Map<Byte, Set<PackageBlock>> mPackagesMap;
+    private final Map<Integer, Set<PackageBlock>> mPackagesMap;
     public TableEntryStore(){
         this.mPackagesMap = new HashMap<>();
     }
@@ -58,15 +58,14 @@ public class TableEntryStore implements EntryStore{
         if(packageBlock==null){
             return;
         }
-        byte pkgId= (byte) packageBlock.getId();
-        Set<PackageBlock> packageBlockSet=getOrCreate(pkgId);
+        Set<PackageBlock> packageBlockSet=getOrCreate(packageBlock.getId());
         if(packageBlockSet.contains(packageBlock)){
             return;
         }
         packageBlockSet.add(packageBlock);
     }
-    private Set<PackageBlock> getOrCreate(byte packageId){
-        Byte id=packageId;
+    private Set<PackageBlock> getOrCreate(int packageId){
+        Integer id=packageId;
         Set<PackageBlock> packageBlockSet=mPackagesMap.get(id);
         if(packageBlockSet==null){
             packageBlockSet=new HashSet<>();
@@ -78,7 +77,7 @@ public class TableEntryStore implements EntryStore{
     public EntryGroup searchEntryGroup(String packageName, String type, String name) {
         return null;
     }
-    private Set<TableBlock> getTableBlocks(byte packageId) {
+    private Set<TableBlock> getTableBlocks(int packageId) {
         Set<TableBlock> results=new HashSet<>();
         Set<PackageBlock> packageBlockSet = mPackagesMap.get(packageId);
         if(packageBlockSet!=null){
@@ -92,7 +91,7 @@ public class TableEntryStore implements EntryStore{
     @Override
     public List<EntryGroup> getEntryGroups(int resourceId) {
         List<EntryGroup> results=new ArrayList<>();
-        byte pkgId= (byte) ((resourceId>>24)&0xff);
+        int pkgId = (resourceId>>24)&0xff;
         Set<PackageBlock> packageBlockSet = mPackagesMap.get(pkgId);
         if(packageBlockSet==null){
             return results;
@@ -107,7 +106,7 @@ public class TableEntryStore implements EntryStore{
     }
     @Override
     public EntryGroup getEntryGroup(int resourceId) {
-        byte pkgId= (byte) ((resourceId>>24)&0xff);
+        int pkgId = (resourceId>>24)&0xff;
         Set<PackageBlock> packageBlockSet = mPackagesMap.get(pkgId);
         if(packageBlockSet==null){
             return null;
@@ -123,7 +122,7 @@ public class TableEntryStore implements EntryStore{
     @Override
     public List<PackageBlock> getPackageBlocks(byte packageId) {
         List<PackageBlock> results=new ArrayList<>();
-        Set<PackageBlock> packageBlockSet = mPackagesMap.get(packageId);
+        Set<PackageBlock> packageBlockSet = mPackagesMap.get(0xff & packageId);
         if(packageBlockSet!=null){
             results.addAll(packageBlockSet);
         }
@@ -132,7 +131,7 @@ public class TableEntryStore implements EntryStore{
     @Override
     public List<TableString> getTableStrings(byte packageId, int stringReference) {
         List<TableString> results=new ArrayList<>();
-        Set<TableBlock> tableBlockSet=getTableBlocks(packageId);
+        Set<TableBlock> tableBlockSet=getTableBlocks(0xff & packageId);
         for(TableBlock tableBlock:tableBlockSet){
             TableString tableString=tableBlock.getTableStringPool().get(stringReference);
             if(tableString!=null){