配置AndroidStudio让编译更快
在个人.gradle文件夹下添加 gradle.properties 文件:
文件内容如下:
org.gradle.daemon=true
修改Android项目更目录中的gradle.properties文件:
文件内容如下:
# Project-wide Gradle settings. # IDE (e.g. Android Studio) users: # Settings specified in this file will override any Gradle settings # configured through the IDE. # For more details on how to configure your build environment visit # http://www.gradle.org/docs/current/userguide/build_environment.html # The Gradle daemon aims to improve the startup and execution time of Gradle. # When set to true the Gradle daemon is to run the build. # TODO: disable daemon on CI, since builds should be clean and reliable on servers org.gradle.daemon=true# Specifies the JVM arguments used for the daemon process. # The setting is particularly useful for tweaking memory settings. # Default value: -Xmx10248m -XX:MaxPermSize=256morg.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8# When configured, Gradle will run in incubating parallel mode. # This option should only be used with decoupled projects. More details, visit # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects org.gradle.parallel=true# Enables new incubating mode that makes Gradle selective when configuring projects. # Only relevant projects are configured which results in faster builds for large multi-projects. # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:configuration_on_demand org.gradle.configureondemand=true
解决方法数超过65535问题
错误描述
一般情况下一款简单的Android应用的方法数不会超过65535,但是随着大量优秀的开源项目导入到项目中,方法数一般会超过这个数,这时如果你再编译应用,则会报错。
NoClassDefFoundError //某个方法找不到//错误情况大致如下Could not find class ‘xxxx’ , referenced from method ‘xxxxx’
解决办法
(1)在app/build.gradle中添加:
dependencies { //multidex support compile 'com.android.support:multidex:1.0.0'}
(2)让自定义的类继承自 MultiDexApplication,并修改onCreate()方法如下:
@Overridepublic void onCreate() { //MultiDex 支持 65535 方法数量限制,注意,此方法要在super.onCreate()之前调用 MultiDex.install(getApplicationContext()); super.onCreate(); }
三方包的导入及build.gradle配置
android{ //添加.so库依赖 sourceSets { main { jniLibs.srcDirs = ['libs'] } } }// 为了让编译器能在libs 目录下找到引用的 .aar 文件repositories { flatDir { dirs 'libs' //this way we can find the .aar file in libs folder } }dependencies { //引用远程仓库包 compile 'com.squareup.picasso:picasso:2.5.2' //引用app/libs 目录下包 compile files('libs/gson-2.2.4.jar') //引用项目库文件 文件结构 /app /stickyListView ,注意配置 setting.gradle 文件 : include ':app',':stickyListView' compile project(':stickyListView') //引入aar库文件 compile(name:'aar_library_name', ext:'aar') //改.aar文件位于app/libs目录下,并且已经配置repositories}
Android常用命令
ADB相关命令
(1)获取连接到的手机序列号
adb get-serialno
(2)查看当前连接的设备
adb devices
(3)重启adb server
adb kill-serveradb start-server
秘钥相关命令
(1)查看keystore的信息
keytool -list -v -keystore xp.jks 或者: keytool -list -keystore (keystore文件) -alias (key的别名) -v
(2)查看keystore的公钥证书信息
keytool -list -keystore (keystore文件) -alias (key的别名) -rfc (注:获取Base64格式的公钥证书,RFC 1421)
(3)查看apk的签名信息
jarsigner -verify -verbose -certs <your_apk_path.apk>
(4)生成keystore
创建keystore,需要用到keytool.exe (位于jdk_xx\jre\bin目录下),具体做法如下:
keytool -genkey -alias mykey -keyalg RSA -validity 40000 -keystore demo.keystore#说明:# -genkey 产生密钥# -alias mykey 别名 mykey# -keyalg RSA 使用RSA算法对签名加密# -validity 40000 有效期限4000天# -keystore demo.keystore
(5)对apk签名
使用产生的keystore对apk签名,使用到的是jarsigner.exe ,该工具位于jdk_xx\bin目录下,命令如下:
jarsigner -verbose -keystore demo.keystore -signedjar test_signed.apk test.apk mykey# test_signed.apk是签名之后的文件 # test.apk是需要签名的文件
另外需要注意的是,如果你的jdk版本在1.7以上,你在对apk签名时,需要加上这个参数:
-digestalg SHA1 -sigalg MD5withRSA
否则同样会出现:Failure [INSTALL_PARSE_FAILED_NO_CERTIFICATES]的错误。
推荐:非常有用的开发工具之Android Studio插件:http://www.apkbus.com/blog-705730-61414.html