学习着网上的android热修复技术自己写了了测试的，在高版本手机可以成功运行，可是在低版本api18下运行报错，提示：invalid drawable tag vector 错误，google了很多资料，总是找不到原因

Question

用的gradle版本是：

classpath 'com.android.tools.build:gradle:1.3.0' 

build.gradle:

android {
    compileSdkVersion 23  buildToolsVersion "23.0.1"  defaultConfig { applicationId "com.example.andhotfixex"  minSdkVersion 14  targetSdkVersion 23  versionCode 1  versionName "1.0"  testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"  }
    buildTypes {
        release { minifyEnabled false  proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'  }
    }
    applicationVariants.all { variant ->
        variant.dex.dependsOn << processWithJavassist // 在执行dx命令之前将代码打入到class中  }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'  })
    compile 'com.android.support:appcompat-v7:23.0.1'  testCompile 'junit:junit:4.12'  compile project(':hotfixlib')
    compile project(':hackdex')
}

报的关键错误：

org.xmlpull.v1.XmlPullParserException: Binary XML file line #17<vector> tag requires viewportWidth > 0

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.andhotfixex/com.example.andhotfixex.MainActivity}: android.content.res.Resources$NotFoundException: File res/drawable/abc_vector_test.xml from drawable resource ID #0x7f02004f

Caused by: android.content.res.Resources$NotFoundException: File res/drawable/abc_vector_test.xml from drawable resource ID #0x7f02004f

Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #17: invalid drawable tag vector

Answer 1

你用的哪个热修复框架，就去看下他们的文档，应该是会有支持版本的信息。

如果低版本不支持热修复，那你就在代码判断版本是否执行热修复就好了

Answer 2

Android高版本对比低版本，会加入组件或者bug修复，一般建议仔细阅读版本差异