执行ionic build android和ionic run android命令时报以下错误：
Error: Failed to find 'ANDROID_HOME' environment variable. Try setting setting it manually. Failed to find 'android' command in your 'PATH'. Try update your 'PATH' to include path to valid SDK directory.
配置如下环境变量：
ANDROID_HOME=D:\Program Files\Android\android-sdk
PATH=%ANDROID_HOME%\tools;%ANDROID_HOME%\platform-tools
