Nrthugu

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 String{Manifest.permission.WRITE_EXTERNAL_STORAGE},

                MY_PERMISSIONS_WRITE_EXTERNAL_STORAGE);

    }

}