frida test

dakvik-test.js

script = session.create_script('''
Dalvik.perform(function () {
    var Activity = Dalvik.use("com.example.myapp.MyActivity");
    Activity.hookMe.overload("java.lang.String").implementation = function () {
        Activity.hookMe.overload("java.lang.String").call(args[0], "foo");//comment out this line won't crash
        return "foo";
    };
});
''')
// This result in immediate crash
// Question: Is args[0] refer to this? How do I refer args, like accessing arg in hookMe?

//Test Android Code
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(getApplicationContext(), hookMe("test"), Toast.LENGTH_SHORT).show();
            }
        });
    }


    public String hookMe(String arg)
    {
        return arg+"I'm memeda";
    }