Unity3d中的Input 和手机端的硬件按钮关联起来

// 返回键
if ( Application.platform == RuntimePlatform.Android &&(Input.GetKeyDown(KeyCode.Escape)))
{
//....
}
// Home键

if ( Application.platform == RuntimePlatform.Android &&(Input.GetKeyDown(KeyCode.Home) ))
{
//.....
}