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I’m trying to implement a way to create pdf files in my app. Currently I’m using PDF Writer APW for that. I followed the instruction from jguerinet and pasted all necessary files to the project (as new package). But when I run the code, I always get the below exception. I also tried to use File downloads = Environment.getExternalStorageDirectory(); instead of File downloads = Environment.getDataDirectory(); wihtout any sucess. Can someone please tell me, what I’m doing wrong?

2018-11-10 12:52:38.843 31238-31238/com.abc.systeminfo I/PDF: Writing file to /data/PDFWriterAPW.pdf
2018-11-10 12:52:38.845 31238-31238/com.abc.systeminfo W/PDF IOException: java.io.IOException: Permission denied
 at java.io.UnixFileSystem.createFileExclusively0(Native Method)
 at java.io.UnixFileSystem.createFileExclusively(UnixFileSystem.java:281)
 at java.io.File.createNewFile(File.java:1000)
 at com.abc.systeminfo.CreateFile.outputToFile(CreateFile.java:72)
 at com.abc.systeminfo.CreateFile.<init>(CreateFile.java:28)
 at com.abc.systeminfo.ActivityStart$1.onClick(ActivityStart.java:54)
 at android.view.View.performClick(View.java:6256)
 at android.view.View$PerformClick.run(View.java:24701)
 at android.os.Handler.handleCallback(Handler.java:789)
 at android.os.Handler.dispatchMessage(Handler.java:98)
 at android.os.Looper.loop(Looper.java:164)
 at android.app.ActivityThread.main(ActivityThread.java:6541)
 at java.lang.reflect.Method.invoke(Native Method)
 at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

CreateFile.java

package com.abc.systeminfo;

import android.os.Environment;
import android.util.Log;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import crl.android.pdfwriter.PDFWriter;
import crl.android.pdfwriter.StandardFonts;
import crl.android.pdfwriter.Transformation;

public class CreateFile 

 PDFWriter mPDFWriter;
 String pdfcontent;
 String encoding = "ISO-8859-1";
 String fileName = "PDFWriterAPW.pdf";

 public CreateFile(String pdfcontent) 
 mPDFWriter = new PDFWriter();
 this.pdfcontent = pdfcontent; // will be used later instead of String s
 String s = generateHelloWorldPDF();

 outputToFile(fileName, s, encoding);
 

 public String generateHelloWorldPDF() 
 mPDFWriter.setFont(StandardFonts.SUBTYPE, StandardFonts.TIMES_ROMAN);
 mPDFWriter.addRawContent("1 0 0 rgn");
 mPDFWriter.addTextAsHex(70, 50, 12, "68656c6c6f20776f726c6420286173206865782921");
 mPDFWriter.setFont(StandardFonts.SUBTYPE, StandardFonts.COURIER, StandardFonts.WIN_ANSI_ENCODING);
 mPDFWriter.addRawContent("0 0 0 rgn");
 mPDFWriter.addText(30, 90, 10, "� CRL", Transformation.DEGREES_270_ROTATION);

 mPDFWriter.newPage();
 mPDFWriter.addRawContent(" 0 dn");
 mPDFWriter.addRawContent("1 wn");
 mPDFWriter.addRawContent("0 0 1 RGn");
 mPDFWriter.addRawContent("0 1 0 rgn");
 mPDFWriter.addRectangle(40, 50, 280, 50);
 mPDFWriter.addText(85, 75, 18, "Code Research Laboratories");

 mPDFWriter.newPage();
 mPDFWriter.setFont(StandardFonts.SUBTYPE, StandardFonts.COURIER_BOLD);
 mPDFWriter.addText(150, 150, 14, "http://coderesearchlabs.com");
 mPDFWriter.addLine(150, 140, 270, 140);

 int pageCount = mPDFWriter.getPageCount();
 for (int i = 0; i < pageCount; i++) 
 mPDFWriter.setCurrentPage(i);
 mPDFWriter.addText(10, 10, 8, Integer.toString(i + 1) + " / " + Integer.toString(pageCount));
 

 String s = mPDFWriter.asString();
 return s;
 

 private void outputToFile(String fileName, String pdfContent, String encoding) 
 File downloads = Environment.getDataDirectory();
 //File downloads = Environment.getExternalStorageDirectory();
 if (!downloads.exists() && !downloads.mkdirs())
 throw new RuntimeException("Could not create download folder");

 File newFile = new File(downloads, fileName);
 Log.i("PDF", "Writing file to " + newFile);

 try 
 newFile.createNewFile();
 try 
 FileOutputStream pdfFile = new FileOutputStream(newFile);
 pdfFile.write(pdfContent.getBytes(encoding));
 pdfFile.close();
 catch (FileNotFoundException e) 
 Log.w("PDF FileNotFound ", e);
 
 catch (IOException e) 
 Log.w("PDF IOException", e);
 
 

AndroidManifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.abc.systeminfo">

 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

 <application
 android:allowBackup="true"
 android:icon="@mipmap/ic_launcher"
 android:label="@string/app_name"
 android:roundIcon="@mipmap/ic_launcher_round"
 android:supportsRtl="true"
 android:theme="@style/AppTheme">
 <activity android:name=".ActivityStart">
 <intent-filter>
 <action android:name="android.intent.action.MAIN" />

 <category android:name="android.intent.category.LAUNCHER" />
 </intent-filter>
 </activity>
 </application>

</manifest>

You need to request permission in runtime before doing that operation like below (this is needed for devices which use lollipop and above android os)

if (ContextCompat.checkSelfPermission(thisActivity,Manifest.permission.WRITE_EXTERNAL_STORAGE)!= PackageManager.PERMISSION_GRANTED) 
 // Permission is not granted
 if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
 Manifest.permission.WRITE_EXTERNAL_STORAGE)) 
 // Show an explanation to the user *asynchronously* -- don't block
 // this thread waiting for the user's response! After the user
 // sees the explanation, try again to request the permission.
 else 
 // No explanation needed; request the permission
 ActivityCompat.requestPermissions(thisActivity,
 new StringManifest.permission.WRITE_EXTERNAL_STORAGE,
 MY_PERMISSIONS_WRITE_EXTERNAL_STORAGE);