This method will change the application’s execute files,
that’s dex and/or apk files. The changing will happen before
the installation or after the installation. Before the installation,
we can change the package file:apk file; after installtion we
must change the corresponding dex file in the directory dalvikcache
which is in the target machine. The first kind of change
can be executed in pc client. The principle of this method is
that after changing the code, re-compute the checksum and reassign
the file to avoid the detection of Android. The main
steps are