Using Cydia substrate to implement Android hooks

Using Cydia substrate to implement Android hooks, the article comes from an official tutorial.

1, install Cydia substrate frame apk, the phone must be root.

2, code writing;

In the manifest file, declare the following:

<application        android:allowbackup= "true"        android:icon= "@drawable/ic_launcher"         Android:label= "@string/app_name"        android:theme= "@style/apptheme" >        <meta-  Data            android:name= "Com.saurik.substrate.main"            android:value= ". Main "/></application><uses-permission android:name=" Cydia.permission.SUBSTRATE "/>

The code for the main class is as follows:

 Public classMain { Public Static voidInitialize () {hooksaygoer (); }        Static voidHookrescolor () {ms.hookclassload ("Android.content.res.Resources",                NewMS. Classloadhook () {@Override Public voidClassloaded (class<?>Resources) {Method GetColor=NULL; Try{GetColor= Resources.getdeclaredmethod ("GetColor", Integer.type); } Catch(nosuchmethodexception e) {e.printstacktrace (); }                        if(GetColor! =NULL) {Ms.hookmethod (Resources,getcolor,NewMs. Methodalteration<resources, integer>() {                                         PublicInteger invoked (resources resources, Object ... args) throwsThrowable {returninvoke (resources, args)& ~0X0000FF00 | 0x00ff0000;                        }                                    });    }                    }                }); }    }

where Initialize () is equivalent to the entry function, the code is implemented as follows:

Personal feeling cydia substrate is based on class loading, method invocation, key or dependent on Java reflection, Android system source readable can certainly be modified, if it is a third-party program code obfuscation or encryption, then Java reflection Invalidation, this framework is also useful?

Using Cydia substrate to implement Android hooks