Android基础逆向如何实现

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第一步：试玩。

自己玩

第二步：反编译，搜索关键字。

1.搜索"成功"

这里搜索到了三条数据

点进去之后是这样一个方法：

.method public static d()V    .locals 4    const/4 v3, 0x1    const/4 v2, 0x0    sget v0, Lcom/xy/kom/d/bk;->i:I    invoke-static {v0}, Lcom/xy/kom/g/p;->b(I)Z    sget v0, Lcom/xy/kom/d/bk;->h:I    invoke-static {v0}, Lcom/xy/kom/g/p;->c(I)Z    sget-boolean v0, Lcom/xy/kom/d/bk;->G:Z    if-eqz v0, :cond_4    sget-object v0, Lcom/xy/kom/GameActivity;->A:Lcom/xy/kom/GameActivity;    iget-object v0, v0, Lcom/xy/kom/GameActivity;->m:Lcom/xy/kom/g/p;    invoke-virtual {v0}, Lcom/xy/kom/g/p;->x()Ljava/util/ArrayList;    move-result-object v0    invoke-static {}, Lcom/xy/kom/g/f;->l()Lcom/xy/kom/g/f;    move-result-object v1    invoke-virtual {v0, v1}, Ljava/util/ArrayList;->add(Ljava/lang/Object;)Z    :goto_0    sget-object v0, Lcom/xy/kom/GameActivity;->A:Lcom/xy/kom/GameActivity;    iget-object v0, v0, Lcom/xy/kom/GameActivity;->m:Lcom/xy/kom/g/p;    invoke-virtual {v0}, Lcom/xy/kom/g/p;->t()V    sget-object v0, Lcom/xy/kom/GameActivity;->A:Lcom/xy/kom/GameActivity;    iget-object v0, v0, Lcom/xy/kom/GameActivity;->r:Lcom/xy/kom/d/ei;    if-eqz v0, :cond_0    sget-object v0, Lcom/xy/kom/GameActivity;->A:Lcom/xy/kom/GameActivity;    iget-object v0, v0, Lcom/xy/kom/GameActivity;->r:Lcom/xy/kom/d/ei;    invoke-virtual {v0, v2}, Lcom/xy/kom/d/ei;->a(I)V    :cond_0    sget-object v0, Lcom/xy/kom/GameActivity;->A:Lcom/xy/kom/GameActivity;    const/4 v1, 0x6    invoke-virtual {v0, v1}, Lcom/xy/kom/GameActivity;->a(I)V    invoke-static {}, Lcom/xy/kom/d/bk;->h()V    sget-object v0, Lcom/xy/kom/GameActivity;->A:Lcom/xy/kom/GameActivity;    const-string v1, "\u8d2d\u4e70\u6210\u529f\uff01\u9053\u5177\u5df2\u53d1\u653e"    invoke-static {v0, v1, v2}, Landroid/widget/Toast;->makeText(Landroid/content/Context;Ljava/lang/CharSequence;I)Landroid/widget/Toast;    move-result-object v0    invoke-virtual {v0}, Landroid/widget/Toast;->show()V    sget-object v0, Lcom/xy/kom/GameActivity;->N:Lcom/xy/kom/e/a;    invoke-virtual {v0, v3}, Lcom/xy/kom/e/a;->a(I)V    sput-boolean v3, Lcom/xy/kom/GameActivity;->M:Z    invoke-static {}, Lcom/xy/kom/a/h;->f()I    move-result v0    const/16 v1, 0xd    if-ne v0, v1, :cond_2    sget v0, Lcom/xy/kom/GameActivity;->h:I    const/4 v1, 0x2    if-ne v0, v1, :cond_2    sget-object v0, Lcom/xy/kom/GameActivity;->A:Lcom/xy/kom/GameActivity;    iget-object v0, v0, Lcom/xy/kom/GameActivity;->m:Lcom/xy/kom/g/p;    invoke-virtual {v0}, Lcom/xy/kom/g/p;->w()Ljava/util/ArrayList;    move-result-object v0    invoke-interface {v0}, Ljava/util/List;->size()I    move-result v1    sget-object v2, Lcom/xy/kom/GameActivity;->A:Lcom/xy/kom/GameActivity;    iget-object v2, v2, Lcom/xy/kom/GameActivity;->m:Lcom/xy/kom/g/p;    invoke-virtual {v2}, Lcom/xy/kom/g/p;->l()I    move-result v2    if-ne v1, v2, :cond_1    sget-object v1, Lcom/xy/kom/GameActivity;->A:Lcom/xy/kom/GameActivity;    iget-object v1, v1, Lcom/xy/kom/GameActivity;->r:Lcom/xy/kom/d/ei;    invoke-interface {v0}, Ljava/util/List;->size()I    move-result v2    add-int/lit8 v2, v2, -0x1    invoke-interface {v0, v2}, Ljava/util/List;->get(I)Ljava/lang/Object;    move-result-object v0    check-cast v0, Lcom/xy/kom/g/f;    invoke-virtual {v1, v0}, Lcom/xy/kom/d/ei;->b(Lcom/xy/kom/g/f;)V    :cond_1    sget-object v0, Lcom/xy/kom/GameActivity;->A:Lcom/xy/kom/GameActivity;    iget-object v0, v0, Lcom/xy/kom/GameActivity;->r:Lcom/xy/kom/d/ei;    sget-object v1, Lcom/xy/kom/d/bk;->d:Lcom/xy/kom/g/f;    invoke-virtual {v0, v1}, Lcom/xy/kom/d/ei;->a(Lcom/xy/kom/g/f;)V    invoke-static {}, Lcom/xy/kom/d/bk;->m()V    :cond_2    sget-boolean v0, Lcom/xy/kom/d/bk;->G:Z    if-nez v0, :cond_3    const/4 v0, 0x0    sput-object v0, Lcom/xy/kom/d/bk;->d:Lcom/xy/kom/g/f;    :cond_3    return-void    :cond_4    sget-object v0, Lcom/xy/kom/GameActivity;->A:Lcom/xy/kom/GameActivity;    iget-object v0, v0, Lcom/xy/kom/GameActivity;->m:Lcom/xy/kom/g/p;    invoke-virtual {v0}, Lcom/xy/kom/g/p;->x()Ljava/util/ArrayList;    move-result-object v0    sget-object v1, Lcom/xy/kom/d/bk;->d:Lcom/xy/kom/g/f;    invoke-virtual {v0, v1}, Ljava/util/ArrayList;->add(Ljava/lang/Object;)Z    goto/16 :goto_0.end method

这里找到一个调用成功的方法。我们继续溯源查看。

发现是一个onResult方法。

解决方法：
（1）覆盖switch失败转为成功。
（2）更改switch跳转
（3）最后一种我最喜欢作用，思路最明确，使用goto进行跳转。跳转到成功即可。

恩，改完之后汇编，整个游戏就破解好了。
没什么好说的。

测试成果。

是成功的，懒的玩。不想发图，自己测试吧，有疑问可以找我。

实例分析（2）

之前没有找好，现在去找找。
找练习的APK的时候主要注意三点。
（1）最好是单机
（2）选择大小的时候选小一点的，恩，反编译快。我们的目的是为了练习。
（3）无壳，现阶段可定脱不了壳。

找到了一个什么酷跑什么的游戏。
三步走

第一步 试玩

原版apk：练习传送门在这里找，编号：2002

拿到游戏，首先就要玩一下是不，人家怎么购买的你总要知道吧。说不定会有新的发现。

反编译破解

搜索关键字"成功失败"

点开之后进去，发现，原来还是一个onResult。

.method public onResult(ILjava/lang/String;Ljava/lang/Object;)V    .locals 3    .param p1, "paramAnonymousInt"    # I    .param p2, "paramAnonymousString"    # Ljava/lang/String;    .param p3, "paramAnonymousObject"    # Ljava/lang/Object;    .prologue    goto :pswitch_0    .line 26    packed-switch p1, :pswitch_data_0    .line 37    const-string v0, "Unity"    new-instance v1, Ljava/lang/StringBuilder;    const-string v2, "\u8d2d\u4e70\u9053\u5177\uff1a["    invoke-direct {v1, v2}, Ljava/lang/StringBuilder;->(Ljava/lang/String;)V    invoke-virtual {v1, p2}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;    move-result-object v1    const-string v2, "]\u53d6\u6d88\uff01"    invoke-virtual {v1, v2}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;    move-result-object v1    invoke-virtual {v1}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;    move-result-object v1    invoke-static {v0, v1}, Landroid/util/Log;->v(Ljava/lang/String;Ljava/lang/String;)I    .line 38    invoke-static {}, Lcom/huibang/paopao/MainActivity;->access$0()Ljava/lang/String;    move-result-object v0    invoke-static {}, Lcom/huibang/paopao/MainActivity;->access$1()Ljava/lang/String;    move-result-object v1    const-string v2, "cancel"    invoke-static {v0, v1, v2}, Lcom/unity3d/player/UnityPlayer;->UnitySendMessage(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V    .line 41    :goto_0    return-void    .line 29    :pswitch_0    const-string v0, "Unity"    new-instance v1, Ljava/lang/StringBuilder;    const-string v2, "\u8d2d\u4e70\u9053\u5177\uff1a["    invoke-direct {v1, v2}, Ljava/lang/StringBuilder;->(Ljava/lang/String;)V    invoke-virtual {v1, p2}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;    move-result-object v1    const-string v2, "]  \u6210\u529f\uff01"    invoke-virtual {v1, v2}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;    move-result-object v1    invoke-virtual {v1}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;    move-result-object v1    invoke-static {v0, v1}, Landroid/util/Log;->v(Ljava/lang/String;Ljava/lang/String;)I    .line 30    invoke-static {}, Lcom/huibang/paopao/MainActivity;->access$0()Ljava/lang/String;    move-result-object v0    invoke-static {}, Lcom/huibang/paopao/MainActivity;->access$1()Ljava/lang/String;    move-result-object v1    const-string v2, "success"    invoke-static {v0, v1, v2}, Lcom/unity3d/player/UnityPlayer;->UnitySendMessage(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V    goto :goto_0    .line 33    :pswitch_1    const-string v0, "Unity"    new-instance v1, Ljava/lang/StringBuilder;    const-string v2, "\u8d2d\u4e70\u9053\u5177\uff1a["    invoke-direct {v1, v2}, Ljava/lang/StringBuilder;->(Ljava/lang/String;)V    invoke-virtual {v1, p2}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;    move-result-object v1    const-string v2, "] \u5931\u8d25\uff01"    invoke-virtual {v1, v2}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;    move-result-object v1    invoke-virtual {v1}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;    move-result-object v1    invoke-static {v0, v1}, Landroid/util/Log;->v(Ljava/lang/String;Ljava/lang/String;)I    .line 34    invoke-static {}, Lcom/huibang/paopao/MainActivity;->access$0()Ljava/lang/String;    move-result-object v0    invoke-static {}, Lcom/huibang/paopao/MainActivity;->access$1()Ljava/lang/String;    move-result-object v1    const-string v2, "fail"    invoke-static {v0, v1, v2}, Lcom/unity3d/player/UnityPlayer;->UnitySendMessage(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V    goto :goto_0    .line 26    nop    :pswitch_data_0    .packed-switch 0x1        :pswitch_0        :pswitch_1    .end packed-switch.end method

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