将iText创建的PDF保存为内部存储器，为MODE_WORLD_READABLE [英] Save iText created PDF to internal memory as MODE_WORLD_READABLE

问题描述

文件生成正常。我决定添加一些逻辑来处理设备是否没有外部存储器，或者外部存储器是否设置为只读;在这种情况下，我会尝试将文件保存到我的应用程序的文件系统中的特定目录。这也很好。问题是当试图让第三方应用程序显示该文件时。我知道我应该将文件保存为Mode_World_Readable，但是无法通过我找到的示例将其保存。

The file is generating fine. I decided to add some logic to handle if the device didn't have an external storage, or if the external storage was set to read-only; in which case, I would try to save the file to a specific directory in my app's filesystem. This works fine, too. The problem is when trying to get the third party app to show the file. I understand that I should be saving the file as Mode_World_Readable, but just can't get it to work from the examples I have found.

以下是我的代码的摘录：

Here is an excerpt of my code:

//Build a filename from the data provided
String reportTitle = args.getFromDate() + "_" + args.getToDate() + ".pdf";

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} else {
   //Something else is wrong. 
   //Maybe there isn't a SD Card
   //It may be one of many other states, but all we need
   //to know is we can neither read nor write to external storage
   mExternalStorageAvailable = mExternalStorageWriteable = false;
   try {

      //Get the absolute path to the filesystem directory 
      //where the internal files are saved. 
      File painReportFolder = ctx.getFilesDir();
      //The string of the sub directory we want to access
      String filename = "Reports/PainReports/";
      //Create a new 'file' to build the directory
      File file = new File(painReportFolder, filename);
      //Make the directory if it doesn't exist
      file.mkdirs();

      //Build a FileOutputStream with the filename appended
      theFile = new FileOutputStream(file + java.io.File.separator + reportTitle);

      //This is what the examples suggest,
      //But it doesn't work.
      //In this configuration, at least
      //FileOutputStream fos = openFileOutput(filename, Context.MODE_WORLD_READABLE);

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// creation of the different writers
PdfWriter writer;
if(mExternalStorageAvailable == false &&  mExternalStorageWriteable == false){
   //if no sd card, or sd card is read-only,
   //write to specific directory in internal
   writer = PdfWriter.getInstance(document, theFile );
}else{
   //otherwise, write to a dir on the sd card
   writer = PdfWriter.getInstance(document, new FileOutputStream(currentDirectory + java.io.File.separator + reportTitle));
}

所以PdfWriter.getInstance（）会接受FileOutputStream，但它不会接受由openFileOutput创建的FileOutputStream我无法将MODE_WORLD_READABLE添加到'theFile'

So PdfWriter.getInstance() will accept a FileOutputStream, but it wont accept the FileOutputStream created by openFileOutput and I can't add MODE_WORLD_READABLE to 'theFile'

我在过去一周一直在研究这个问题，并尝试不同的代码变体。我在Stackoverflow或其他任何地方找到的任何内容都没有直接回复我的查询。

I've been researching this for the past week, and trying out different variations of code. Nothing I've found on Stackoverflow or anywhere else directly answers my query.

推荐答案

不知道为什么这是downvoted，或者由谁（可能是一些巨魔，因为没有留下任何评论），但进一步的研究表明我没有解决方案。

Don't know why this was downvoted, or by whom (probably some troll, as no comment was left), but further research has shown to me that there is no solution.

为什么？

取出你的SD卡并尝试拍照;它说它需要一张卡片 - 它不会保存到内部;这是一个捆绑的应用程序。

Take out your sd card and try to take a photo; it says that it needs a card - it wont save to internal; and this is a bundled app.

所以我回滚了所有的sd检查代码：

So I've rolled-back all of my sd checking code:

如果有sd;保存

如果有sd，但它是只读的;显示错误页面

If there is sd, but it is read-only; show error page

如果没有sd;显示错误页面

If there is no sd; show error page

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