RNDatecsPrinterModule.java 文件源码

/**
    * Feed paper to the printer (roll out blank paper)
    *
    * @param linesQuantity
    * @param promise
    */
@ReactMethod
public void feedPaper(int linesQuantity, Promise promise) {
    if (linesQuantity < 0 || linesQuantity > 255) {
        promise.reject("AMOUNT_LINES_0_255");
        return;
    }
    try {
        mPrinter.feedPaper(linesQuantity);
        mPrinter.flush();

        promise.resolve("PAPER_FED");
    } catch (Exception e) {
        promise.reject("Erro: " + e.getMessage());
    }
}