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dexload's Introduction

原理

类似MultiDex,不过在加载过程中对一些系统函数做了hook加载,这样可以让加载更为安全一点 第一次加载可能略慢,提供了两个方案

  • hook 优化函数,每次执行都不进行优化,这样每次启动的速度时间不会相差太大(这种方法兼容性差)
  • 第一次启动进行优化加载,并对加载dex进行优化(并对优化后文件进行加密),第一次启动时间可能略慢。 启动时间和MultiDex相差不大。

动态加载方案

比如,要求某个dex插件在某个时间点加载,也可以用这个方法加载。这样可以,并且也有一定的安全性(对优化后的文件进行加密)

使用方法

  • encrypt.x.dex 复制到Assets文件夹内(加密的)

参考

MultiDex的实现方法

存在问题

  • art 模式下在首次启动时间可能会比较长(dvm不存在这种问题),这是因为首次启动需要dex2oat 优化,但比正常的优化稍微快一点,再次启动app后,几乎没明显影响 以下做了测试: 加载三个dex分别
第一个 807kb 首次启动0.8秒左右
第二个 2.6m 首次启动2s 左右
第三个 8.5m 4秒左右
三个一起使用:5.3秒 左右
  • 另外由于国内 各种os 系统改的七花八门,兼容性可能会差一点,后期慢慢优化

写在最后:

c语言比较菜,只能写成这样,后期慢慢优化。

dexload's People

Contributors

xiaobaiyey avatar

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