if you believe you have a JDK installed and it was not properly recognized,simply set an environment variable JAVA_HOME to point it |
检查HOME设置
（转载请标注：源自;Phodal's Blog)
JDK_HOME
C:\Program Files\Java\jdk1.7.0_21
JAVA_HOME
C:\Program Files\Java\jre7
ANDROID_STUDO_SDK
D:\Program Files (x86)\Android\android-studio