在Android Nougat中打开时的PDF文件显示空白屏幕 [英] PDF file when opening in Android Nougat is showing blank screen

问题描述

我正在创建PDF文件并将其保存在本地存储中.尝试打开它时，它在Android N之外的所有设备上均能完美运行.我能够使用FileProvider在Android N中打开PDF文件，但它显示为空白.

I am creating a PDF file and saving it in local storage. When trying to open it, it is working perfect in all devices except in Android N. I am able to open PDF file in Android N using FileProvider, but it is displaying as blank.

这是我的URI

content://com.products.provider/external_storage_root/Android/data/com.products/in_17052017_170502_1_1001.pdf

这是我的代码

Uri path;

File pdfFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/"
                + "Android" + "/" + "data" + "/" + "com.products" + "/" + file);

if (Build.VERSION.SDK_INT >= 24) {
            path = FileProvider.getUriForFile(getActivity(), "com.products.provider", pdfFile);
        } else {
            path = Uri.fromFile(pdfFile);
        }

        // Setting the intent for pdf reader
        Intent pdfIntent = new Intent(Intent.ACTION_VIEW);
        pdfIntent.setDataAndType(path, "application/pdf");
        pdfIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        pdfIntent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);

        try {
            startActivity(pdfIntent);
        } catch (ActivityNotFoundException e) {
            Toast.makeText(getActivity(), "Can't read pdf file", Toast.LENGTH_SHORT).show();
        }

推荐答案

问题在于您如何在意图上设置标志

The problem is with how you are setting the flags on the intent

pdfIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
pdfIntent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);

相反，请尝试以下操作:

Instead, try this:

pdfIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
pdfIntent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);

这篇关于在Android Nougat中打开时的PDF文件显示空白屏幕的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！