使用Android中的打印管理器将字节数组打印为PDF

// 创建PrintDocumentAdapter对象
PrintDocumentAdapter printAdapter = new PrintDocumentAdapter() {
    @Override
    public void onWrite(PageRange[] pages, ParcelFileDescriptor destination, CancellationSignal cancellationSignal, WriteResultCallback callback) {
        // 将字节数组写入打印输出流
        try {
            FileOutputStream output = new FileOutputStream(destination.getFileDescriptor());
            output.write(byteArray); // byteArray为待打印的字节数组
            callback.onWriteFinished(new PageRange[]{PageRange.ALL_PAGES});
        } catch (IOException e) {
            // 处理异常
        }
    }

    @Override
    public void onLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes, CancellationSignal cancellationSignal, LayoutResultCallback callback, Bundle extras) {
        // 不需要布局，直接传递打印内容
        callback.onLayoutFinished(new PrintDocumentInfo.Builder("print_output.pdf").setContentType(PrintDocumentInfo.CONTENT_TYPE_DOCUMENT).build(), false);
    }
};

// 创建PrintAttributes对象
PrintAttributes attributes = new PrintAttributes.Builder()
        .setMediaSize(PrintAttributes.MediaSize.ISO_A4)
        .setResolution(new PrintAttributes.Resolution("pdf", "pdf", 300, 300))
        .setColorMode(PrintAttributes.COLOR_MODE_COLOR)
        .build();

// 调用PrintManager的print()方法开始打印
PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
printManager.print("print_job_name", printAdapter, attributes);