1.Unable to find the layout for Action Bar.
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2.adb server version (31) doesn't match this client (36); killing...
error: could not install *smartsocket* listener: cannot bind to 127.0.0.1:5037:
通常每个套接字地址(协议/网络地址/端口)只允许使用一次。 (10048)
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3.Connecting to the target VM, address: 'localhost:8600', transport: 'socket'
in android studio: tools->android->enable adb integration(this should be checked) uncheck this, then check again. this solved me this problem. (it restarts the adb integration)
4.
uiautomatorviewer。第一次使用出现报错：Unable to connect to adb. Check if adb is installed correctly。
解决办法如下：
1、打开uiautomatorviewer.bat，找到uiautomatorviewer.bat文件最后一行：
call "%java_exe%" "-Djava.ext.dirs=%javaextdirs%" "-Dcom.android.uiautomator.bindir=%prog_dir%" -jar %jarpath% %*2、将 %prog_dir% 修改为SDK的platform-tools所在路径。
3、修改后的最后一行为：
call "%java_exe%" "-Djava.ext.dirs=%javaextdirs%" "-Dcom.android.uiautomator.bindir=D:\AndroidSDK\platform-tools" -jar %jarpath% %*4、再次启动工具uiautomatorviewer：
5.Android Studio 加入aar 资源包 报Failed to resolve:
repositories{
flatDir{
dirs 'libs'
}
}
添加 aar资源包报Failed to resolve：xxxx，则需要build.gradle 添加上述代码块
6.Cannot find System Java Compiler. Ensure that you have installed a JDK (not just a JRE) and configured your JAVA_HOME system variable to point to the according directory.
详细报错信息如下
Error:Execution failed for task ':app:compileDebugJavaWithJavac'.
> Cannot find System Java Compiler. Ensure that you have installed a JDK (not just a JRE) and configured your JAVA_HOME system variable to point to the according directory.原因
你要导入项目的gradle版本不对，要么过高要么过低，建议将gradle版本改为新建项目的gradle版本
解决方案
在找到project下面的build.gradle，修改gradle版本。如果不知道具体是哪个版本，可以直接复制新建项目的build.gradle版本。比如：将classpath ‘com.android.tools.build:gradle:1.3.0’修改为classpath ‘com.android.tools.build:gradle:2.2.3’