android - intent.setType ("application/pdf") 允许选择任何文件

Question

我正在制作一个应用程序，我想在其中提供上传 pdf 文件的选项。我已经编写了这段代码，但它允许选择任何类型的文档。我只想允许选择pdf文件。我的目标是 API 级别 28。

 case 2:
   Intent pickPdf = new Intent(Intent.ACTION_GET_CONTENT);
   pickPdf.setType("application/pdf");
   pickPdf.addCategory(Intent.CATEGORY_OPENABLE);
   myBundle.putString("type",type);
   try {
     startActivityForResult(Intent.createChooser(pickPdf, "Select a File to Upload"),103);
   } catch (ActivityNotFoundException e) {
     Toast.makeText(GuarantorDocsupload.this, "Please Install a File Manager",Toast.LENGTH_SHORT).show();
   }
   break;

Answer 1

这对我有用。

private static final int STORAGE_PERMISSION_CODE = 123;

      Intent intent = new Intent();
      intent.setAction(Intent.ACTION_GET_CONTENT);
      intent.addCategory(Intent.CATEGORY_OPENABLE);
      intent.setType("application/pdf");
      intent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT);
      intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);

try {
     startActivityForResult(Intent.createChooser(intent, "Select Your .pdf File"), PICK_PDF_REQUEST);
   } catch (ActivityNotFoundException e) {
     Toast.makeText(GuarantorDocsupload.this, "Please Install a File Manager",Toast.LENGTH_SHORT).show();
   }

也许这会对你有所帮助。