Reverse Engineering Asked by hanan on December 28, 2020
I wanted to hook the method A1f
in the below code but frida returns the following exceptions:
Found instance: MyHomeFragment{9bbd8d5} (0965bca9-4838-4ca1-a835-d99639ae15f1)}
java.lang.IllegalStateException: Fragment MyHomeFragment{9bbd8d5} (0965bca9-4838-4ca1-a835-d99639ae15f1)} not attached to an activity.
Found instance: MyHomeFragment{8e4752} (c7e2fb7a-bbcd-4b79-b9ff-ce1a06117e40) id=0x7f0a0e33}
java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
how can I call removeView()
through frida just to solve that exception? is it possible to do that?
additionally is there ways to hook? I am new to frida instrumentation.
Here is the method to hook:
public final class MyHomeFragment extends 1Id implements 1Ij, C4Z, 1Io, 2OS {
public 0ou A00;
public 65i A01;
public String A02;
public final View A1f(LayoutInflater layoutInflater, ViewGroup viewGroup, Bundle bundle) {
int A022 = 051.A02(1608567253);
65i r1 = this.A01;
Preconditions.checkNotNull(r1);
LithoView A07 = r1.A07(A0w());
FrameLayout frameLayout = new FrameLayout(A0m());
frameLayout.setLayoutParams(new ViewGroup.LayoutParams(-1, -1));
frameLayout.addView(A07);
051.A08(-871184214, A022);
return frameLayout;
}
}
and the frida script I tried to hook with:
Java.perform(function () {
Java.choose("com.myapp.perish.home.fragments.MyHomeFragment", {
onMatch: function (instance) {
//This function will be called for every instance found by frida
try {
var LayoutInflater = Java.use("android.view.LayoutInflater");
var ViewGroup = Java.use("android.view.ViewGroup");
var Bundle = Java.use("android.os.Bundle");
console.log("Found instance: " + instance);
console.log(JSON.stringify(instance.A1f(null, null, null)));
} catch (e) {
console.log(e.message);
}
},
onComplete: function () {},
});
});
previously I tried to pass LayoutInflater
ViewGroup
Bundle
arguments to A1f
method I got an exception depicting that .overload
method got differently what it expects. I don’t how to solve it. but when replaced all the three params with null
. I got that above exception that parentView should be removed! how can I solve this?
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