class Delete(IScript):
    def __init__(self):
        self.ctx = None
        self.mainProject = None
        self.ddd = None

    def run(self, ctx):
        self.ctx = ctx
        self.mainProject = ctx.getMainProject()
        self.createNullCall()

        for unit in self.mainProject.findUnits(IJavaSourceUnit):
            c = unit.getClassElement()
            if c.getName() != "La/a/a/b;":
                continue
            for m in c.getMethods():
                self.decryptMethodStrings(m)
                self.displayTree(m)
            unit.notifyGenericChange()

    def createNullCall(self):
        dex = self.mainProject.findUnit(IDexUnit)
        print(dex)
        m = dex.addMethod("La/a/a/b;->null2()V")
        dexDecompilerUnit = DecompilerHelper.getDecompiler(dex)
        javaMethod = dexDecompilerUnit.decompileMethod("La/a/a/b;->null2()V")
        javaMethod = dexDecompilerUnit.getMethod("La/a/a/b;->null2()V", False)
        u = self.mainProject.findUnit(IJavaSourceUnit)
        print(u)
        self.cstbuilder = u.getFactories()
        self.nullcall = self.cstbuilder.createCall(javaMethod, 3)
        print(self.nullcall)

    def decryptMethodStrings(self, javaMethod):
        block = javaMethod.getBody()
        i = 0
        while i < block.size():
            stm = block.get(i)
            self.checkElement(block, stm)
            i += 1

    def checkElement(self, parent, e):
        if isinstance(e, IJavaCall):
            r = parent.replaceSubElement(e, self.nullcall)
            print("replace", e, r)
        for subelt in e.getSubElements():
            self.checkElement(e, subelt) 
    def dealElem(self, m, e):
        if e.getElementType() == JavaElementType.Call:
            r = m.replaceSubElement(e, self.cstbuilder.createBlock())
            # r = e.replaceSubElement(e, self.cstbuilder.createBlock())
            print(e, r)
            return
        for item in e.getSubElements():
            self.dealElem(m, item)

扣破脑子写的代码, 用空函数替换掉垃圾指令 但是执行会崩溃