拦截系统函数出错 #8
Description
android o上尝试拦截 android.webkit.WebView的loadUrl方法
代码如下：
Class<?> webViewClass = getClassLoader().loadClass("android.webkit.WebView");
HookManager.findAndHookMethod(webViewClass, "loadUrl", String.class, new MethodCallback() {
@OverRide
protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
super.beforeHookedMethod(param);
Log.d("panda", "i'm in method " +param.method.getName()+" beforeHookedMethod");
}
@OverRide
protected void afterHookedMethod(MethodHookParam param) throws Throwable {
super.afterHookedMethod(param);
Log.d("panda", "i'm in method " +param.method.getName()+" afterHookedMethod");
}
});
异常如下：
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.panda.hook.andhook, PID: 17591
java.lang.VerifyError: Verifier rejected class com.panda.hook.andhook.MainActivity: void com.panda.hook.andhook.MainActivity.onCreate(android.os.Bundle) failed to verify: void com.panda.hook.andhook.MainActivity.onCreate(android.os.Bundle): [0x4B] 'this' argument 'Reference: com.panda.hook.andhook.MyWebview' not instance of 'Reference: android_webkit_WebView' (declaration of 'com.panda.hook.andhook.MainActivity' appears in /data/app/com.panda.hook.andhook-jnxRzI9vY8XQW7tN8LeIQA==/split_lib_slice_0_apk.apk)
at java.lang.Class.newInstance(Native Method)
at android.app.Instrumentation.newActivity(Instrumentation.java:1174)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2669)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)