如何通过反射使用奇巧4.4打印API我打印的WebView？ [英] How do I print a WebView using KitKat 4.4 print API via reflection?

问题描述

我需要支持打印的奇巧设备，但我的目标SDK是13（改变不是一个选项）。

I need to support printing on KitKat devices but my target SDK is 13 (changing is not an option).

我特别需要打印的WebView。

Specifically I need to print a webview.

这是用于打印的WebView的API： http://developer.android.com/training/printing/html-docs.html

This is the API for printing a webview: http://developer.android.com/training/printing/html-docs.html

推荐答案

这是一个旧的，但印刷是一种有用的所以这可能是不错的正常工作。 （无反射;））

It's an old one but printing is kind of usefull so this could be good to work correctly. (Without reflection ;))

一个更好的方式与设备的版本工作。不需要的try-catch，只需要在返回之前添加一些信息，或者你只是隐藏按钮/菜单/ ...根据相同的条件。

A better way to work with devices version. No try-catch needed, just need to add some messages before the return or you just hide the button/menu/... depending on the same condition.

@TargetApi(Build.VERSION_CODES.KITKAT)
    private void createWebPrintJob(WebView webView) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) 
            return;

        // Get a PrintManager instance
        PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);

        // Get a print adapter instance
        PrintDocumentAdapter printAdapter = webView.createPrintDocumentAdapter();

        // Create a print job with name and adapter instance
        String jobName = getString(R.string.app_name) + " Document";
        printManager.print(jobName, printAdapter,
                new PrintAttributes.Builder().build());

    }

将打印作业将只用SDK为19及以上

The printJob will be execute only with SDK 19 and above

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