首先有这方面需要的请到https://github.com/xiangzhihong/andfixDemo/tree/master下载例子
对于网上提供的热补丁修复就不多说了,主要有这3种方式可以实现(至于其他的方式,暂不清楚)
1.dexposed github https://github.com/alibaba/dexposed
2.andfix github https://github.com/alibaba/AndFix
3.bsdiff
dexposed和andfix是alibaba的开源项目,都是apk增量更新的实现框架,目前dexposed的兼容性较差,只有2.3,4.0~4.4兼容,其他Android版本不兼容或未测试,详细可以去dexposed的github项目主页查看,而andfix则兼容2.3~6.0,所以就拿这个项目来实现增量更新吧。至于bsdiff,只是阅览了一下,还没研究过。
首先 git clone github https://github.com/alibaba/AndFix,将andfix项目下载下来,Android studio可以在build.gradle里导入andfix,
compile 'com.alipay.euler:andfix:0.3.1'
但是我是使用module的方式添加andfix,这样可以直接查看编辑源码,而且直接gradle导入的话还有个问题,后面再说。
我看了下官网的demo主要是在android装载到内存的时候去加载我们新的dex的包,然后加载到内存,要研究原理的请到这个地址去查看:
下面主要说实现:
andfix里有些文件夹不用导入的,例如tools,doc等,记得新建jniLibs文件夹,libs里的so文件移到jniLibs里。
接下来我们参照官网的demo
public class MainApplication extends Application {
private static final String TAG = "euler";
private static final String APATCH_PATH = "/out.apatch";
private static final String DIR = "apatch";//补丁文件夹
/**
* patch manager
*/
private PatchManager mPatchManager;
@Override
public void onCreate() {
super.onCreate();
// initialize
mPatchManager = new PatchManager(this);
mPatchManager.init("1.0");
Log.d(TAG, "inited.");
// load patch
mPatchManager.loadPatch();
// Log.d(TAG, "apatch loaded.");
// add patch at runtime
try {
// .apatch file path
String patchFileString = Environment.getExternalStorageDirectory()
.getAbsolutePath() + APATCH_PATH;
mPatchManager.addPatch(patchFileString);
Log.d(TAG, "apatch:" + patchFileString + " added.");
//这里我加了个方法,复制加载补丁成功后,删除sdcard的补丁,避免每次进入程序都重新加载一次
File f = new File(this.getFilesDir(), DIR + APATCH_PATH);
if (f.exists()) {
boolean result = new File(patchFileString).delete();
if (!result)
Log.e(TAG, patchFileString + " delete fail");
}
} catch (IOException e) {
Log.e(TAG, "", e);
}
}
刚刚说的直接在gradle里导入andfix会有个问题,是在原来的项目中,加载一次补丁后,out.apatch文件会copy到getFilesDir目录下的/apatch文件夹中,在下次补丁更新时,会检测补丁是否已经添加在apatch文件夹下,已存在就不会复制加载sdcard的out.apatch。
原来的addpath方法
public void addPatch(String path) throws IOException {
File src = new File(path);
File dest = new File(mPatchDir, src.getName());
if(!src.exists()){
throw new FileNotFoundException(path);
}
if (dest.exists()) {
Log.d(TAG, "patch [" + path + "] has be loaded.");
return;
}
FileUtil.copyFile(src, dest);// copy to patch's directory
Patch patch = addPatch(dest);
if (patch != null) {
loadPatch(patch);
}
}
修改后,判断apatch下的out.apatch存在即删除掉,重新复制加载sdcard下的out.apatch
public void addPatch(String path) throws IOException {
File src = new File(path);
File dest = new File(mPatchDir, src.getName());
if (!src.exists()) {
throw new FileNotFoundException(path);
}
if (dest.exists()) {
Log.d(TAG, "patch [" + src.getName() + "] has be loaded.");
boolean deleteResult = dest.delete();
if (deleteResult)
Log.e(TAG, "patch [" + dest.getPath() + "] has be delete.");
else {
Log.e(TAG, "patch [" + dest.getPath() + "] delete error");
return;
}
}
FileUtil.copyFile(src, dest);// copy to patch's directory
Patch patch = addPatch(dest);
if (patch != null) {
loadPatch(patch);
}
}
还有源码混淆
-optimizationpasses 5 # 指定代码的压缩级别
-dontusemixedcaseclassnames # 是否使用大小写混合
-dontskipnonpubliclibraryclasses # 是否混淆第三方jar
-dontpreverify # 混淆时是否做预校验
-verbose # 混淆时是否记录日志
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/* # 混淆时所采用的算法
#重要,別忘了這些,不混淆andfix包,不混淆native方法
-dontwarn android.annotation
-dontwarn com.alipay.euler.**
-keep class com.alipay.euler.** {*;}
-keep class * extends java.lang.annotation.Annotation
-keepclasseswithmembernames class * {
native <methods>;
}
下面我们打包:
cmd输入命令,具体参数看usage
apkpatch.bat -f new.apk -t old.apk -o output1 -k suning.keystore -p Suning1234 -a suning -e Suning1234 【完整命令】
上面这个命令有点问题,用下面的:
apkpatch -f new.apk -t old.apk -o output -k xzh.jks -p 19881205 -a keyalias -e 19881205
解释下这个意思,apkpatch -f <new apk> -t <old.apk> -o<输出位置> -k <keystore> -p<password> -a <key alias> -e <password>
这里的keystore就是你签名包
如无错误,编译后会生成一个apatch文件,改名成out.apatch
里面的smali列出了不同的文件,diff.dex就是android 虚拟机加载运行的不同的文件。
安装打开1.apk
关闭app,将out.apatch放sdcard根目录后,重新打开app,toast方法改变了
2) 几个开源热修复或插件化解决方案(排名不分先后)
https://github.com/lzyzsd/AndroidHotFixExamples
https://github.com/simpleton/dalvik_patch
https://github.com/dodola/HotFix
https://github.com/jasonross/Nuwa
https://github.com/alibaba/AndFix
https://github.com/rovo89/Xposed
https://github.com/alibaba/dexposed
https://github.com/bunnyblue/DroidFix
https://github.com/CtripMobile/DynamicAPK
3) 技术原理博客(排名不分先后)
http://bugly.qq.com/blog/?p=781(QQ空间的解决方案)
(Android Dex分包方案)
http://lirenlong.github.io/hotfix/(浅析xposed、dexposed和AndFix的原理)
(鸿洋)
(android反编译)