/**
 * indicate current running platform
 */
export declare const isAndroid: boolean;
/**
 * display ios-style action sheet
 * @param optionTextArray such : ['从相册选择','拍摄']
 * @param onClickItem invoke when user click option with clicked index
 * @param cancelText as the name
 */
export declare function displayIosNativeActionSheet(optionTextArray: string[], onClickItem: (buttonIndex: number) => void, cancelText?: string): void;
/**
 * display toast in different platform , the implementation is different
 * toast in android platform can be overwrite
 * @param message which message you want to display
 * @param durationSecond showing duration of the message
 */
export declare function showToast(message: string, durationSecond?: number): void;
/**
 * use this function open system setting and jump to correspond application
 */
export declare function jumpToApplicationSetting(): void;