code: function isAndroidCustomContentValid(customContent){
  
  	var isValid = true;
  
  	if(typeof customContent !== 'object'){
  		isValid = false;
  	}else{
  		for(var key in customContent){
  			if(typeof customContent[key] !== 'string'){
  				isValid = false;
  				break;
  			}
  		}
  	}
  
  	return isValid;
  }
docs: 检查customContent是否合法
  @param  {object} customContent 待检查的customContent对象
  @return {Boolean}              检查结果