1 在android studio 下新建android project ，编译没有问题。

而导入已经存在的项目时，一直报错：Connection refused。

这个时候就要考虑是配置哪里跟自己android studio 本地的不一样，果然：

问题出在 build.gradle:


classpath'com.android.tools.build:gradle:com.android.tools.build:gradle:2.2.3'

这个要跟自己local一致才可以。

2

执行 android studio可以编译项目但是在命令行./gradlew 则报错：


Downloading https://services.gradle.org/distributions/gradle-2.14.1-all.zip


Exception in thread "main" java.lang.RuntimeException: java.net.ConnectException: Connection timed out

at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:78)


需要配置projectgradle.properties,添加

systemProp.http.proxyHost=proxyidsystemProp.http.nonProxyHosts=192.168.*,systemProp.http.proxyPort=3128systemProp.https.proxyHost=proxyidsystemProp.https.nonProxyHosts=192.168.*,systemProp.https.proxyPort=3128

因为download 用的是https, 而直接用studio 编译好像用的是http


3 andorid studio 升级后，直接安装apk使用 multiple slice apks 的方式，即

adbinstall-multiple-rcode/app/build/outputs/apk/app-debug.apkcode/app/build/intermediates/split-apk/debug/slices/slice_3.apkcode/app/build/intermediates/split-apk/debug/slices/slice_9.apkcode/app/build/intermediates/split-apk/debug/slices/slice_2.apkcode/app/build/intermediates/split-apk/debug/slices/slice_0.apkcode/app/build/intermediates/split-apk/debug/slices/slice_1.apkcode/app/build/intermediates/split-apk/debug/slices/slice_4.apkcode/app/build/intermediates/split-apk/debug/slices/slice_8.apkcode/app/build/intermediates/split-apk/debug/slices/slice_5.apkcode/app/build/intermediates/split-apk/debug/slices/slice_6.apkcode/app/build/intermediates/split-apk/debug/slices/slice_7.apkSplitAPKsinstalled

但是编译出来的

app-debug.apk

直接安装就会报错，所以想使用adb install方式安装的话需要

disable instant run.

具体 File->settings->searchbox(type instant run)-> select disable option.

4 apk安装不上，报错： INSTALL_FAILED_TEST_ONLY: installPackageLI.

原因：　android studio ,gradle plugin, gradle tool是beta版本，版本配置不对导致的


inapp/gradle/wrapper/gradle-wrapper.properties:


distributionUrl=https\://services.gradle.org/distributions/gradle-4.0-rc-1-all.zip

app/build.gradle

dependencies {

classpath 'com.android.tools.build:gradle:3.0.0-alpha4'

}

都需要修改，再编译即可。

5 在命令行编译app ,

./gradlew clean assemble：

得到错误：

FAILURE:Buildfailedwithanexception.*Whatwentwrong:Aproblemoccurredconfiguringrootproject'FacebookTestPlan'.>Couldnotresolveallfilesforconfiguration':classpath'.>3.0.0-alpha4.Searchedinthefollowinglocations:https://jcenter.bintray.com/com/android/tools/build/gradle/3.0.0-alpha4/gradle-3.0.0-alpha4.pomhttps://jcenter.bintray.com/com/android/tools/build/gradle/3.0.0-alpha4/gradle-3.0.0-alpha4.jarRequiredby:project:


原因：看起来是下载组件不成功。

在project/build.gradle中

a)buildscript 和allprojects都需要添加

maven {

url 'https://maven.google.com'

// Alternative URL is 'https://dl.google.com/dl/android/maven2/'

}


两个都需要根据数据下载相应插件，

b)allprojects 并不包括buildscript.buildscript只是给build的组件用的。

The buildscript block is where you configure the repositories and dependencies for Gradle itself--meaning, you should not include dependencies
for your modules here.

The allprojects block is where you configure the repositories and
* dependencies used by all modules in your project, such as third-party plugins
* or libraries. Dependencies that are not required by all the modules in the
* project should be configured in module-level build.gradle files.

c) 写在app/build.gradle里面和写在allprojects是一样的。

related URL :https://developer.android.com/studio/build/index.html

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