对于热修复也学习了2天，基本了解它是怎么操作与实现的，自己在做的时候也遇到了一些坑，看到好的文庄总是忍不住要收藏，要学习，下面这篇文章内容写的很好，借此分享非大家！
转载地址：
http://blog.csdn.net/qq_34306963/article/details/76926930
官方文档：https://github.com/Tencent/tinker
下面我们按照官方文档和这个里面的tinker-sample-android来进行集成Tinker。
注意说明，
官方demo的使用https://github.com/Tencent/tinker/wiki/Tinker-接入指南里面的使用步骤详解
热加载
简单的说 如果Android要加载一个类 就会调用ClassLoader的findClass方法 在dex中查找这个类 找到后加载到内存
而我们要做的就是在findClass的时候让类加载找到的是我们修复过后的类，而不是未修复的类。
这里写图片描述
至于是如何做到的暂时还没有深究，个人理解大概是通过反射替换了ClassLoader，通过自定义的ClassLoader去加载更新之后的类文件从而完成替换
直接上手
关于热更新介绍和机制，网上很多介绍，这里简单记录一下小白使用Tinker热更新的经历
跑通demo，稍后再说导入
https://github.com/Tencent/tinker
-
将tinker-sample-android 导入
这里要注意的是
20170808173726600.png
需要将app 下的gradle 中 gitRev 字段自己赋值，因为在没有配置git的情况下，无法获取，这个值作为Tinker 的Id，我好像没感觉这个玩意有啥用，应该是唯一的即可，然后这个项目就可以根据编译打包啦（即带有bug需要修复的线上版本）
- 修改Bug
比如给随便一个按钮点击事件中多打印一个Toast
- 打差异包
首先在Gradle中配置带有bug的apk路径，以及资源文件txt路径，以便让Tinker新老apk进行比较，生成差异包
这里写图片描述
在AS自带命令行中输入 gradlew tinkerPatchDebug，如果其中报错
Warning:ignoreWarning is false, but resources.arsc is changed, you should use applyResourceMapping mode to build the new apk, otherwise, it may be crash at some times
com.tencent.tinker.build.util.TinkerPatchException: ignoreWarning is false, but resources.arsc is changed, you should use applyResourceMapping mode to build the new apk, otherwise, it may be crash at some times
FAILURE: Build failed with an exception.
What went wrong:
Could not dispatch a message to the daemon.Try:
Run with –stacktrace option to get the stack trace. Run with –info or –debug option to get more log output.
，可在Gradle中尝试打开警告忽略
20170808175604998.png
4.将生成的Patch包导入代码中的加载路径，默认项目中MainActivity中写死了，在存储卡根目录
TinkerInstaller.onReceiveUpgradePatch(getApplicationContext(), Environment.getExternalStorageDirectory().getAbsolutePath() + “/patch_signed_7zip.apk”);
patch默认生成在
20170808180945296.png
5.最后一步，调用
TinkerInstaller.onReceiveUpgradePatch(getApplicationContext(), Environment.getExternalStorageDirectory().getAbsolutePath() + "/patch_signed_7zip.apk");
即可，然后将程序关闭，重新打开，就执行的是新的代码啦~
导入到自己的工程
推荐使用Gradle导入
在app下添加
apply plugin: 'com.tencent.tinker.patch'
compile('com.tencent.tinker:tinker-android-anno:1.7.11')
//tinker的核心库
compile('com.tencent.tinker:tinker-android-lib:1.7.11')
compile "com.android.support:multidex:1.0.1"
project.gradle
classpath ('com.tencent.tinker:tinker-patch-gradle-plugin:1.7.11')
附上我的完整gradle文件，注意，一定要配置签名文件
apply plugin: 'com.android.application'
apply plugin: 'com.tencent.tinker.patch'
def gitSha() {
try {
// String gitRev = 'git rev-parse --short HEAD'.execute(null, project.rootDir).text.trim()
String gitRev = "fushuang666"
if (gitRev == null) {
throw new GradleException("can't get git rev, you should add git to system path or just input test value, such as 'testTinkerId'")
}
return gitRev
} catch (Exception e) {
throw new GradleException("can't get git rev, you should add git to system path or just input test value, such as 'testTinkerId'")
}
}
def javaVersion = JavaVersion.VERSION_1_7
def bakPath = file("${buildDir}/bakApk/")
/**
* you can use assembleRelease to build you base apk
* use tinkerPatchRelease -POLD_APK= -PAPPLY_MAPPING= -PAPPLY_RESOURCE= to build patch
* add apk from the build/bakApk
*/
ext {
//for some reason, you may want to ignore tinkerBuild, such as instant run debug build?
tinkerEnabled = true
//for normal build
//old apk file to build patch apk
tinkerOldApkPath = "${bakPath}/app-debug-0808-17-04-26.apk"
//proguard mapping file to build patch apk
tinkerApplyMappingPath = "${bakPath}/app-debug-1018-17-32-47-mapping.txt"
//resource R.txt to build patch apk, must input if there is resource changed
tinkerApplyResourcePath = "${bakPath}/app-debug-0808-17-04-26.txt"
//only use for build all flavor, if not, just ignore this field
tinkerBuildFlavorDirectory = "${bakPath}/app-1018-17-32-47"
}
def getOldApkPath() {
return hasProperty("OLD_APK") ? OLD_APK : ext.tinkerOldApkPath
}
def getApplyMappingPath() {
return hasProperty("APPLY_MAPPING") ? APPLY_MAPPING : ext.tinkerApplyMappingPath
}
def getApplyResourceMappingPath() {
return hasProperty("APPLY_RESOURCE") ? APPLY_RESOURCE : ext.tinkerApplyResourcePath
}
def getTinkerIdValue() {
return hasProperty("TINKER_ID") ? TINKER_ID : gitSha()
}
def buildWithTinker() {
return hasProperty("TINKER_ENABLE") ? TINKER_ENABLE : ext.tinkerEnabled
}
def getTinkerBuildFlavorDirectory() {
return ext.tinkerBuildFlavorDirectory
}
if (buildWithTinker()) {
apply plugin: 'com.tencent.tinker.patch'
tinkerPatch {
/**
* necessary，default 'null'
* the old apk path, use to diff with the new apk to build
* add apk from the build/bakApk
*/
oldApk = getOldApkPath()
/**
* optional，default 'false'
* there are some cases we may get some warnings
* if ignoreWarning is true, we would just assert the patch process
* case 1: minSdkVersion is below 14, but you are using dexMode with raw.
* it must be crash when load.
* case 2: newly added Android Component in AndroidManifest.xml,
* it must be crash when load.
* case 3: loader classes in dex.loader{} are not keep in the main dex,
* it must be let tinker not work.
* case 4: loader classes in dex.loader{} changes,
* loader classes is ues to load patch dex. it is useless to change them.
* it won't crash, but these changes can't effect. you may ignore it
* case 5: resources.arsc has changed, but we don't use applyResourceMapping to build
*/
ignoreWarning = true
/**
* optional，default 'true'
* whether sign the patch file
* if not, you must do yourself. otherwise it can't check success during the patch loading
* we will use the sign config with your build type
*/
useSign = true
/**
* optional，default 'true'
* whether use tinker to build
*/
tinkerEnable = buildWithTinker()
/**
* Warning, applyMapping will affect the normal android build!
*/
buildConfig {
/**
* optional，default 'null'
* if we use tinkerPatch to build the patch apk, you'd better to apply the old
* apk mapping file if minifyEnabled is enable!
* Warning:
* you must be careful that it will affect the normal assemble build!
*/
applyMapping = getApplyMappingPath()
/**
* optional，default 'null'
* It is nice to keep the resource id from R.txt file to reduce java changes
*/
applyResourceMapping = getApplyResourceMappingPath()
/**
* necessary，default 'null'
* because we don't want to check the base apk with md5 in the runtime(it is slow)
* tinkerId is use to identify the unique base apk when the patch is tried to apply.
* we can use git rev, svn rev or simply versionCode.
* we will gen the tinkerId in your manifest automatic
*/
tinkerId = getTinkerIdValue()
/**
* if keepDexApply is true, class in which dex refer to the old apk.
* open this can reduce the dex diff file size.
*/
keepDexApply = false
/**
* optional, default 'false'
* Whether tinker should treat the base apk as the one being protected by app
* protection tools.
* If this attribute is true, the generated patch package will contain a
* dex including all changed classes instead of any dexdiff patch-info files.
*/
isProtectedApp = false
}
dex {
/**
* optional，default 'jar'
* only can be 'raw' or 'jar'. for raw, we would keep its original format
* for jar, we would repack dexes with zip format.
* if you want to support below 14, you must use jar
* or you want to save rom or check quicker, you can use raw mode also
*/
dexMode = "jar"
/**
* necessary，default '[]'
* what dexes in apk are expected to deal with tinkerPatch
* it support * or ? pattern.
*/
pattern = ["classes*.dex",
"assets/secondary-dex-?.jar"]
/**
* necessary，default '[]'
* Warning, it is very very important, loader classes can't change with patch.
* thus, they will be removed from patch dexes.
* you must put the following class into main dex.
* Simply, you should add your own application {@code tinker.sample.android.SampleApplication}
* own tinkerLoader, and the classes you use in them
*
*/
loader = [
//use sample, let BaseBuildInfo unchangeable with tinker
"tinker.sample.android.app.BaseBuildInfo"
]
}
lib {
/**
* optional，default '[]'
* what library in apk are expected to deal with tinkerPatch
* it support * or ? pattern.
* for library in assets, we would just recover them in the patch directory
* you can get them in TinkerLoadResult with Tinker
*/
pattern = ["lib/*/*.so"]
}
res {
/**
* optional，default '[]'
* what resource in apk are expected to deal with tinkerPatch
* it support * or ? pattern.
* you must include all your resources in apk here,
* otherwise, they won't repack in the new apk resources.
*/
pattern = ["res/*", "assets/*", "resources.arsc", "AndroidManifest.xml"]
/**
* optional，default '[]'
* the resource file exclude patterns, ignore add, delete or modify resource change
* it support * or ? pattern.
* Warning, we can only use for files no relative with resources.arsc
*/
ignoreChange = ["assets/sample_meta.txt"]
/**
* default 100kb
* for modify resource, if it is larger than 'largeModSize'
* we would like to use bsdiff algorithm to reduce patch file size
*/
largeModSize = 100
}
packageConfig {
/**
* optional，default 'TINKER_ID, TINKER_ID_VALUE' 'NEW_TINKER_ID, NEW_TINKER_ID_VALUE'
* package meta file gen. path is assets/package_meta.txt in patch file
* you can use securityCheck.getPackageProperties() in your ownPackageCheck method
* or TinkerLoadResult.getPackageConfigByName
* we will get the TINKER_ID from the old apk manifest for you automatic,
* other config files (such as patchMessage below)is not necessary
*/
configField("patchMessage", "tinker is sample to use")
/**
* just a sample case, you can use such as sdkVersion, brand, channel...
* you can parse it in the SamplePatchListener.
* Then you can use patch conditional!
*/
configField("platform", "all")
/**
* patch version via packageConfig
*/
configField("patchVersion", "1.0")
}
//or you can add config filed outside, or get meta value from old apk
//project.tinkerPatch.packageConfig.configField("test1", project.tinkerPatch.packageConfig.getMetaDataFromOldApk("Test"))
//project.tinkerPatch.packageConfig.configField("test2", "sample")
/**
* if you don't use zipArtifact or path, we just use 7za to try
*/
sevenZip {
/**
* optional，default '7za'
* the 7zip artifact path, it will use the right 7za with your platform
*/
zipArtifact = "com.tencent.mm:SevenZip:1.1.10"
/**
* optional，default '7za'
* you can specify the 7za path yourself, it will overwrite the zipArtifact value
*/
// path = "/usr/local/bin/7za"
}
}
List<String> flavors = new ArrayList<>();
project.android.productFlavors.each {flavor ->
flavors.add(flavor.name)
}
boolean hasFlavors = flavors.size() > 0
def date = new Date().format("MMdd-HH-mm-ss")
/**
* bak apk and mapping
*/
android.applicationVariants.all { variant ->
/**
* task type, you want to bak
*/
def taskName = variant.name
tasks.all {
if ("assemble${taskName.capitalize()}".equalsIgnoreCase(it.name)) {
it.doLast {
copy {
def fileNamePrefix = "${project.name}-${variant.baseName}"
def newFileNamePrefix = hasFlavors ? "${fileNamePrefix}" : "${fileNamePrefix}-${date}"
def destPath = hasFlavors ? file("${bakPath}/${project.name}-${date}/${variant.flavorName}") : bakPath
from variant.outputs.outputFile
into destPath
rename { String fileName ->
fileName.replace("${fileNamePrefix}.apk", "${newFileNamePrefix}.apk")
}
from "${buildDir}/outputs/mapping/${variant.dirName}/mapping.txt"
into destPath
rename { String fileName ->
fileName.replace("mapping.txt", "${newFileNamePrefix}-mapping.txt")
}
from "${buildDir}/intermediates/symbols/${variant.dirName}/R.txt"
into destPath
rename { String fileName ->
fileName.replace("R.txt", "${newFileNamePrefix}-R.txt")
}
}
}
}
}
}
project.afterEvaluate {
//sample use for build all flavor for one time
if (hasFlavors) {
task(tinkerPatchAllFlavorRelease) {
group = 'tinker'
def originOldPath = getTinkerBuildFlavorDirectory()
for (String flavor : flavors) {
def tinkerTask = tasks.getByName("tinkerPatch${flavor.capitalize()}Release")
dependsOn tinkerTask
def preAssembleTask = tasks.getByName("process${flavor.capitalize()}ReleaseManifest")
preAssembleTask.doFirst {
String flavorName = preAssembleTask.name.substring(7, 8).toLowerCase() + preAssembleTask.name.substring(8, preAssembleTask.name.length() - 15)
project.tinkerPatch.oldApk = "${originOldPath}/${flavorName}/${project.name}-${flavorName}-release.apk"
project.tinkerPatch.buildConfig.applyMapping = "${originOldPath}/${flavorName}/${project.name}-${flavorName}-release-mapping.txt"
project.tinkerPatch.buildConfig.applyResourceMapping = "${originOldPath}/${flavorName}/${project.name}-${flavorName}-release-R.txt"
}
}
}
task(tinkerPatchAllFlavorDebug) {
group = 'tinker'
def originOldPath = getTinkerBuildFlavorDirectory()
for (String flavor : flavors) {
def tinkerTask = tasks.getByName("tinkerPatch${flavor.capitalize()}Debug")
dependsOn tinkerTask
def preAssembleTask = tasks.getByName("process${flavor.capitalize()}DebugManifest")
preAssembleTask.doFirst {
String flavorName = preAssembleTask.name.substring(7, 8).toLowerCase() + preAssembleTask.name.substring(8, preAssembleTask.name.length() - 13)
project.tinkerPatch.oldApk = "${originOldPath}/${flavorName}/${project.name}-${flavorName}-debug.apk"
project.tinkerPatch.buildConfig.applyMapping = "${originOldPath}/${flavorName}/${project.name}-${flavorName}-debug-mapping.txt"
project.tinkerPatch.buildConfig.applyResourceMapping = "${originOldPath}/${flavorName}/${project.name}-${flavorName}-debug-R.txt"
}
}
}
}
}
}
android {
compileSdkVersion 26
buildToolsVersion "26.0.0"
compileOptions {
sourceCompatibility javaVersion
targetCompatibility javaVersion
}
//recommend
dexOptions {
jumboMode = true
}
signingConfigs {
release {
try {
storeFile file("./keystore/key.jks")
storePassword "123456"
keyAlias "key"
keyPassword "123456"
} catch (ex) {
throw new InvalidUserDataException(ex.toString())
}
}
debug {
storeFile file("./keystore/key.jks")
storePassword "123456"
keyAlias "key"
keyPassword "123456"
}
}
defaultConfig {
applicationId "com.example.admin.tinker"
minSdkVersion 19
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
/**
* you can use multiDex and install it in your ApplicationLifeCycle implement
*/
multiDexEnabled true
/**
* buildConfig can change during patch!
* we can use the newly value when patch
*/
buildConfigField "String", "MESSAGE", "\"I am the base apk\""
// buildConfigField "String", "MESSAGE", "\"I am the patch apk\""
/**
* client version would update with patch
* so we can get the newly git version easily!
*/
buildConfigField "String", "TINKER_ID", "\"${getTinkerIdValue()}\""
buildConfigField "String", "PLATFORM", "\"all\""
}
buildTypes {
release {
minifyEnabled true
signingConfig signingConfigs.release
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
debug {
debuggable true
minifyEnabled false
signingConfig signingConfigs.debug
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:26.+'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
testCompile 'junit:junit:4.12'
//可选，用于生成application类
compile('com.tencent.tinker:tinker-android-anno:1.7.11')
//tinker的核心库
compile('com.tencent.tinker:tinker-android-lib:1.7.11')
compile "com.android.support:multidex:1.0.1"
}
将demo中的类导入
这里写图片描述
修改Manifast文件
这里写图片描述
好啦，你的工程可以和Demo工程一样愉快的使用了。具体加载Patch清除Patch 看Demo就可以了
githubDemo地址：https://github.com/fushuangdage/Tinker
