在Android中生成PDF，无需任何第三方库 [英] Generate PDF in Android without any 3rd party Library

问题描述

我需要使用API​​ 19中引入的 PdfDocument 类从我的应用程序生成PDF。我不想使用任何第三方库。

以下是我的工作

I need to generate PDF from my application using PdfDocument class introduced in API 19. I don't want to use any 3rd party library.
Here is what I have done

PdfDocument document = new PdfDocument();
PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(300, 300, 1).create();
PdfDocument.Page page = document.startPage(pageInfo);
View content = findViewById(R.id.testText);
content.draw(page.getCanvas());
document.finishPage(page);
String fullPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/AppName";
File dir = new File(fullPath);
File file = new File(fullPath, "TripReport.PDF");
if (!dir.exists())
    dir.mkdirs();
if (file.exists())
    file.delete();
file.createNewFile();
FileOutputStream os = new FileOutputStream(file);
document.writeTo(os);
document.close();
os.flush();
os.close();

任何人都可以建议我做错了吗？

Can anyone please suggest what I am doing wrong?

推荐答案

我有简单的解决方案，它也有效.........

I have simple solution and it also worked.........

try{                
    File docfile=new File(""+getExternalFilesDir("parent dir"),"filename.pdf");
    Intent intent = new Intent(Intent.ACTION_VIEW);

    intent.setDataAndType(Uri.fromFile(docfile), "application/pdf");                
    startActivity(intent);
}
catch (Exception e) {}

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