Using latest Dex2Jar : Seeing this failure " Failed resolution of: Lres/Hex "

[vramasam]

Hello @ThexXTURBOXx

When we try to use https://mvnrepository.com/artifact/com.squareup.okhttp3/okhttp/4.9.3 in the apk. It results in following error.

Process: com.sampleapp, PID: 13211
java.lang.NoClassDefFoundError: Failed resolution of: Lres/Hex;
at okhttp3.internal.http2.Huffman.$d2j$hex$c61541e3$decode_I(Unknown Source:16)
at okhttp3.internal.http2.Huffman.(Unknown Source:17)
at okhttp3.internal.http2.Hpack$Writer.writeByteString(Unknown Source:11)
at okhttp3.internal.http2.Hpack$Writer.writeHeaders(Unknown Source:264)
at okhttp3.internal.http2.Http2Writer.headers(Unknown Source:12)
at okhttp3.internal.http2.Http2Connection.newStream(Unknown Source:82)
at okhttp3.internal.http2.Http2Connection.newStream(Unknown Source:6)
at okhttp3.internal.http2.Http2ExchangeCodec.writeRequestHeaders(Unknown Source:25)
at okhttp3.internal.connection.Exchange.writeRequestHeaders(Unknown Source:16)
at okhttp3.internal.http.CallServerInterceptor.intercept(Unknown Source:29)
at okhttp3.internal.http.RealInterceptorChain.proceed(Unknown Source:80)
at okhttp3.internal.connection.ConnectInterceptor.intercept(Unknown Source:32)
at okhttp3.internal.http.RealInterceptorChain.proceed(Unknown Source:80)
at okhttp3.internal.cache.CacheInterceptor.intercept(Unknown Source:192)
at okhttp3.internal.http.RealInterceptorChain.proceed(Unknown Source:80)
at okhttp3.internal.http.BridgeInterceptor.intercept(Unknown Source:171)
at okhttp3.internal.http.RealInterceptorChain.proceed(Unknown Source:80)
at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(Unknown Source:37)
at okhttp3.internal.http.RealInterceptorChain.proceed(Unknown Source:80)
at okhttp3.internal.connection.RealCall.getResponseWithInterceptorChain$okhttp(Unknown Source:119)
at okhttp3.internal.connection.RealCall.execute(Unknown Source:27)

How we are calling the OkHttpClient from code: The problem is with 4.x.x http library

private static final String URL_STRING = "https://www.google.com/";
private void okHttpLib()
{
try {
new Thread(new Runnable()
{
@OverRide
public void run()
{
try {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(URL_STRING)
.build();
Response response = client.newCall(request).execute();
Log.i(LOG_TAG, "OK HTTP, " + URL_STRING + ", status code: " + response.code());
response.body().string();
}
catch (Exception e) {
Log.e(LOG_TAG, "Exception while making okhttp call");
}
}
}).start();
}
catch (Exception e) {
Log.e(LOG_TAG, "Exception", e);
}
}

Can you please check this issue?

[vramasam]

Not seeing this exception specific to okHttp library. Observed the same issue in another apk.
Process: com.hdfc.techapp, PID: 9828
java.lang.NoClassDefFoundError: Failed resolution of: Lres/Hex;
at androidx.appcompat.R$styleable.$d2j$hex$b9a46b2b$decode_I(Unknown Source:16)
at androidx.appcompat.R$styleable.(Unknown Source:115)
at androidx.appcompat.app.AppCompatDelegateImpl.createView(Unknown Source:8)
at

Tried the same with the old version of Dex2Jar there this issue is not happening. Can you please look into it?

[ThexXTURBOXx]

Hello, sorry for not responding for quite some time. I needed to finish some work for University and academic purposes.
What exactly are you trying to do? It seems like you are trying to disassemble a dex file into a jar and reassembling it into Dalvik and then trying to run the apk/dex file on an Android phone. Is that correct?

I searched for the res/Hex file everywhere, but no matter what, I can't find it. Even if you run jadx on an APK file with okhttp included, there is no res/Hex class file.

[vramasam]

@ThexXTURBOXx No problem. Thank you for the response back.

Yes your understanding is correct, we are disassemble the dex file in to jar and then reassembling the Dalvik .

Here as you said this file "res/Hex" is not available in the final apk.
We tried including the "dex-translator/src/test/java/res/Hex.java" in the final dex file, then this error is not coming. or We have to change IR2JConverter MAX_FILL_ARRAY_BYTES to Integer.MAX

Ideally my understanding, in this class dex-translator/src/main/java/com/googlecode/d2j/dex/Dex2Asm.java addHexDecodeMethod suppose to do that. But it didn't happen. I may be wrong here, I thought it will give you idea where to look out. Sorry If I am wrong here.

We also observed this is not happening with Dex2Jar first version for the same apk. It's happening because of the changes done with Dex2Jar latest changes.

[ThexXTURBOXx]

@vramasam Thanks for additional information. Please try out v47 where I believe I have fixed this issue :)

[ThexXTURBOXx]

For future reference:
Introduced bug in: 62eba63
Fixed in: 0e26919 (additional fix in 8496704)

[vramasam]

@vramasam Thanks for additional information. Please try out v47 where I believe I have fixed this issue :)

Sure. Thank you. Will test and update the results here.

[ThexXTURBOXx]

@vramasam Do you have any news on this or are there still any errors occurring regarding this?

[vramasam]

Hello @ThexXTURBOXx

We observed below exception:
2022-03-31 16:17:48.090 20215-20215/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.hdfc.techapp, PID: 20215
java.lang.NoSuchMethodError: No static method decode_B(Ljava/lang/String;)[B in class Landroidx/appcompat/R$styleable; or its super classes (declaration of 'androidx.appcompat.R$styleable' appears in /data/app/~~aQ9x9aGc8JPDrjAM226nIA==/com.xxx.xxxx-qkeGzcHRj9s7g-NO1EajHw==/base.apk)
at androidx.appcompat.R$styleable.$d2j$hex$497c133b$decode_I(Unknown Source:22)
at androidx.appcompat.R$styleable.(Unknown Source:115)
at androidx.appcompat.app.AppCompatDelegateImpl.createView(Unknown Source:8)

[ThexXTURBOXx]

Ah I see! I forgot one small thing. Give me a second :)

[ThexXTURBOXx]

Try again using version v48. Now, the method name should also be properly changed.

[vramasam]

Okay @ThexXTURBOXx . Thank you. Will test and let you know

[ThexXTURBOXx]

@vramasam Any news on this? :)

[vramasam]

Hello @ThexXTURBOXx

Sorry for the delay response. The above error got resolved. We are seeing the following exception.

2022-04-07 12:30:05.898 21597-21597/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.xx.xxxx, PID: 21597
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xxx.techapp/com.xxxx.xxxx.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3763)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3939)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2278)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:246)
at android.app.ActivityThread.main(ActivityThread.java:8429)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:596)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor(Unknown Source:438)
at androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor(Unknown Source:5)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(Unknown Source:0)
at androidx.appcompat.app.AppCompatActivity.setContentView(Unknown Source:7)

[ThexXTURBOXx]

Thanks for your feedback! Nice to hear that this issue has been resolved.
I will take a look at the new issue as soon as possible