Issue in PDFBox

Question

I am using PDFBox

    implementation 'org.apache.pdfbox:pdfbox:3.0.0'

This is my kotlin code:

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (requestCode == 101 && resultCode == RESULT_OK) {
            val uri = data?.data

            contentResolver.openFileDescriptor(uri!!, "r", null)
            val file = File(cacheDir, contentResolver.getFileName(uri))
            if (file.exists()) {
                Loader.loadFDF(file)
            }
        }
    }

And I am facing this error:

FATAL EXCEPTION: main Process: com.example.documnet.translator, PID: 31595 java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=101, result=-1, data=Intent { dat=content://com.android.providers.downloads.documents/document/msf:796 flg=0x1 }} to activity {com.example.documnet.translator/com.example.documnet.translator.DashboardActivity}: java.io.IOException: Error: Header doesn't contain versioninfo at android.app.ActivityThread.deliverResults(ActivityThread.java:5946) at android.app.ActivityThread.handleSendResult(ActivityThread.java:5985) at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:54) at android.app.servertransaction.ActivityTransactionItem.execute(ActivityTransactionItem.java:45) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2443) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loopOnce(Looper.java:226) at android.os.Looper.loop(Looper.java:313) at android.app.ActivityThread.main(ActivityThread.java:8751) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:571) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1135) Caused by: java.io.IOException: Error: Header doesn't contain versioninfo at org.apache.pdfbox.pdfparser.FDFParser.parse(FDFParser.java:98) at org.apache.pdfbox.Loader.loadFDF(Loader.java:79) at com.example.documnet.translator.DashboardActivity.onActivityResult(DashboardActivity.kt:221) at android.app.Activity.dispatchActivityResult(Activity.java:8659) at android.app.ActivityThread.deliverResults(ActivityThread.java:5939) at android.app.ActivityThread.handleSendResult(ActivityThread.java:5985)  at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:54)  at android.app.servertransaction.ActivityTransactionItem.execute(ActivityTransactionItem.java:45)  at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)  at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2443)  at android.os.Handler.dispatchMessage(Handler.java:106)  at android.os.Looper.loopOnce(Looper.java:226)  at android.os.Looper.loop(Looper.java:313)  at android.app.ActivityThread.main(ActivityThread.java:8751)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:571)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1135) 

Answer 1

Well, your stack trace says it all:

Caused by: java.io.IOException: Error: Header doesn't contain versioninfo
 at org.apache.pdfbox.pdfparser.FDFParser.parse(FDFParser.java:98)
 at org.apache.pdfbox.Loader.loadFDF(Loader.java:79)
 at com.example.documnet.translator.DashboardActivity.onActivityResult(DashboardActivity.kt:221)

Thus, the file you attempt to load here:

if (file.exists()) {
    Loader.loadFDF(file)
}

does not appear to be a valid FDF file.

---

In a comment you protest

It's pdf.

Please look again at the method you call: Loader.loadFDF. FDFs and PDFs are different (albeit related) file formats.

Thus, if you want to load a PDF, use a Loader.loadPDF overload instead.