I'm having some difficulty on hooking a lib created by me (.jar)
Apparently Xposed can't see the lib's package.
I'm using this code to see the packages hooked by the xposed and to hook my class:
Code:
public void handleLoadPackage(final LoadPackageParam lpparam) throws Throwable {
Log.v("LogModule", lpparam.packageName);
findAndHookMethod("com.example.ClassTest", lpparam.classLoader, "lock", new XC_MethodHook() {
@Override
protected void beforeHookedMethod(MethodHookParam param) throws Throwable{
Log.v("LogModule", "Hooked");
Log.v("LogModule", param.thisObject.toString());
}
});
is there any issue in hooking an .jar class?
Thks
I'm guessing libraries are loaded as part of other apps and thus their package isn't shown in lpparam.packageName
you can create a dummy app, without any libraries except your own (create a ClassTest object), and in xposed print all its methods (full path). look for ClassTest
Related
I want to hook the constructor with xposed , and the code is as follows ，but there is some wrong.
Code:
XposedHelpers.findAndHookConstructor("java.io.File",
lpparam.classLoader, new XC_MethodHook() {
@Override
protected void beforeHookedMethod(MethodHookParam param)
throws Throwable {
}
@Override
protected void afterHookedMethod(MethodHookParam param)
throws Throwable {
System.out.println("file interception" + "-------------->"
+ param.args[0]);
}
});
Error content:
java.lang.NoSuchMethodError: java.io.File()#exact
Thanks
That's because there is no File() constructor. To hook e.g. File(String filename), you need to use:
Code:
XposedHelpers.findAndHookConstructor("java.io.File",
lpparam.classLoader, [COLOR="Red"][B]String.class, [/B][/COLOR]new XC_MethodHook() {
or simply
Code:
XposedHelpers.findAndHookConstructor(File.class, [COLOR="Red"][B]String.class, [/B][/COLOR]new XC_MethodHook() {
Be careful with such generic classes though, you can easily get lots of calls to it.
rovo89 said:
That's because there is no File() constructor. To hook e.g. File(String filename), you need to use:
Code:
XposedHelpers.findAndHookConstructor("java.io.File",
lpparam.classLoader, [COLOR="Red"][B]String.class, [/B][/COLOR]new XC_MethodHook() {
or simply
Code:
XposedHelpers.findAndHookConstructor(File.class, [COLOR="Red"][B]String.class, [/B][/COLOR]new XC_MethodHook() {
Be careful with such generic classes though, you can easily get lots of calls to it.
Click to expand...
Click to collapse
It works, thanks you very much .
I'm trying to hook GLES API with Xposed. But met some problems. Xposed can work well when i use it for some other things except the GLES API.
The module:
...
public class Tutorial implements IXposedHookLoadPackage {
public void handleLoadPackage(final LoadPackageParam lpparam) throws Throwable {
XposedBridge.log("Loaded app: " + lpparam.packageName);
if (lpparam.packageName.equals("android"))
{
XposedBridge.log("Mark !");
findAndHookMethod("android.opengl.GLES20", lpparam.classLoader, "glFinish", new XC_MethodHook() {
@override
protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
XposedBridge.log("glFinish GLES20");
}
@override
protected void afterHookedMethod(MethodHookParam param) throws Throwable {
XposedBridge.log("glFinish GLES20");
}
});
}
...
And i wrote an app with some glFinish() calls in it. When i run the app, i can't get "glFinish GLES20" at the log file.
I can get "Mark !", and no error in the log file.
Can any one help me? Thanks!
Hi,
I was trying to hook a method of the Google Keyboard. The method is in the com.android.inputmethod.keyboard.Key.java class, and it's definied as
Code:
public final Drawable selectBackgroundDrawable(final Drawable keyBackground, final Drawable functionalKeyBackground, final Drawable spacebarBackground)
I try to hook this method with this snippet of code:
Code:
@Override
public void handleLoadPackage(LoadPackageParam lpparam) throws Throwable {
if(!(lpparam.packageName.equals("com.android.inputmethod.latin") || lpparam.packageName.equals("com.android.inputmethod.keyboard")))
return;
findAndHookMethod("com.android.inputmethod.keyboard.Key", lpparam.classLoader,
"selectBackgroundDrawable", Drawable.class, Drawable.class, Drawable.class,
new XC_MethodHook() {
@Override
protected void beforeHookedMethod(MethodHookParam param)
throws Throwable {
XposedBridge.log("hooked");
}
});
}
But when I run my emulator (genymotion: Custom Phone with android 4.4.4) I get the error "NoSuchMethodError".
How can I solve this?
Are you trying to target the Google Keyboard that you can download from the Play store? I'm showing it having a different package name:
package:/data/app/com.google.android.inputmethod.latin-1/base.apk=com.google.android.inputmethod.latin
The keyboard in my emulator may have the package name "com.android.inputmethod.latin" (I re.ember that I checked it yesterday, but I don't believe in my memory ). I will try the module with both keyboards.
Thanks for the answer
Argh, the package name was com.android.inputmethod.latin as expected...
I decompiled the latinIME.apk file that I found in my emulator...and then I discovered that there isn't a method called "selectBackgroundDrawable" in the class Key.... I don't know what is the android version of the keyboard that I downloaded before. Thanks for your answers
I'am trying to create an Xposed module which hooks into the tranceive methods of nfc to find out what is transfered. But sadly the hook doesn't seam to work. I've created a sample app which sends data over the tranceive method but the logs are not written. Here is my code:
Code:
if (!lpparam.packageName.equals("android"))
return;
findAndHookMethod("android.nfc.tech.BasicTagTechnology", lpparam.classLoader, "transceive", "byte[]", "boolean", new XC_MethodHook() {
@Override
protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
XposedBridge.log("before");
}
@Override
protected void afterHookedMethod(MethodHookParam param) throws Throwable {
XposedBridge.log("after");
}
});
I've also tried to hook into the service, but no logs either:
Code:
if (!lpparam.packageName.equals("com.android.nfc"))
return;
findAndHookMethod("com.android.nfc.NfcService", lpparam.classLoader, "doTransceiveNoLock", "int", "byte[]", new XC_MethodHook() {
.....
Am I doing something wrong or is it simply not possible to hook into these methods?
I found a solution for my problem. I have to hook the transceive method of com.android.nfc.NfcService$TagService to get access to every tag transmission.
I'm not able to change the return values of a method. The hook is working. Even the logs are correct - but when i actually call the method in another app the real information is shown.
Code:
findAndHookMethod("android.net.wifi.WifiInfo", lpparam.classLoader, "getSSID",new XC_MethodHook() {
@Override
protected void afterHookedMethod(MethodHookParam param) throws Throwable {
XposedBridge.log("getSSID1 "+(String) param.getResult());
param.setResult("\"Changed\"");
XposedBridge.log("getSSID2 "+(String) param.getResult());
}
@Override
protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
}
});
Output:
Code:
getSSID1 "realSSID"
getSSID2 "Changed"
In app the call actually produces: "realSSID"
Can you help me with that?
what about when you setResult in beforeHookedMethod instead (thus the getSSID won't be called)?
have you ensured that the app calls getSSID to receive this information, and not from cache or something?
I tried beforeHookedMethod and MethodReplacement - same result. And getSSID is called because i can see the XposedBridge logs.
is it an app you wrote? i see from this answer that it can also be retrieved from getBSSID, and it could be the app was checking the string returned by getSSID or was using it for something else
Yes i use an own app for checking if it works. So i'm 100% sure i'm calling getSSID() - the method i've hooked.
the following works for me:
in module:
Code:
if (lpparam.packageName.equals("gitfib.hooks.sdaccounts")) {
XposedHelpers.findAndHookMethod("android.net.wifi.WifiInfo", lpparam.classLoader,
"getSSID",
new XC_MethodHook() {
@Override
protected void afterHookedMethod(MethodHookParam param) throws Throwable {
super.afterHookedMethod(param);
param.setResult("ssid");
}
});
}
in activity (same package in onCreate):
Code:
WifiInfo info = ((WifiManager) getSystemService(WIFI_SERVICE)).getConnectionInfo();
Log.i("wifiinfo", info.getSSID());
before rebooting it showed actual ssid