pdf extracting with iText error occured

Question

I want to extract the text from a pdf-file on the internet to a string in java using iText. This is my code:

package me.moop.mytwitter;

import java.io.IOException;
import java.text.ParseException;

import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.parser.PdfTextExtractor;

import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import android.app.Activity;
import android.app.ProgressDialog;

public class MainActivity extends Activity {

    Button mBtnCheck;
    EditText mEtxtGroup;
    ProgressDialog mProgressDialog;
    TextView mTxtv1;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.nicelayout3);

        mBtnCheck = (Button) findViewById(R.id.btnCheck);
        mEtxtGroup = (EditText) findViewById(R.id.etxtGroup);
        mTxtv1 = (TextView) findViewById(R.id.textView1);

    }

      public void checkScheduleChange(View view){
        if (view == mBtnCheck){
            String group;
            group = mEtxtGroup.getText().toString();
            if (group.length() > 0){
                mProgressDialog = new ProgressDialog(this);
                mProgressDialog.setMessage("Bezig met checken voor roosterwijzigingen...");
                mProgressDialog.show();
                new CheckScheduleChangeTask().execute();
            }
            else{
                Toast.makeText(this, "Voer een klas in", Toast.LENGTH_LONG).show();
            }
        }
    }

    private class CheckScheduleChangeTask extends AsyncTask<Void, Void, Void> {

        String content;

        @Override
        protected Void doInBackground(Void... args) {

            PdfReader reader = null;
            try {
                reader = new PdfReader("http://www.augustinianum.eu/roosterwijzigingen/14062012.pdf");
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            try {
                content = PdfTextExtractor.getTextFromPage(reader, 1);
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            return null;
        }

        @Override
        protected void onPostExecute(Void arg) {
            mProgressDialog.dismiss();

                String group = mEtxtGroup.getText().toString();
                if (content.contains(group)){
                    Toast.makeText(MainActivity.this, "U hebt een roosterwijziging", Toast.LENGTH_LONG).show();
                }   
                mTxtv1.setText(content);
        }
    }
}

For the people in a hurry, here's the iText part:

private class CheckScheduleChangeTask extends AsyncTask<Void, Void, Void> {

    String content;

    @Override
    protected Void doInBackground(Void... args) {

        PdfReader reader = null;
        try {
            reader = new PdfReader("http://www.augustinianum.eu/roosterwijzigingen/14062012.pdf");
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try {
            content = PdfTextExtractor.getTextFromPage(reader, 1);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return null;
    }

    @Override
    protected void onPostExecute(Void arg) {
    // more code
    }

Whenever I launch this in my emulator I'm getting a fore close after calling the class: CheckScheduleChangeTask. This is the log:

07-27 09:15:08.354: D/ddm-heap(222): Got feature list request
07-27 09:15:12.994: E/dalvikvm(222): Could not find class 'com.itextpdf.text.pdf.PdfReader', referenced from method me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground
07-27 09:15:13.004: W/dalvikvm(222): VFY: unable to resolve new-instance 410 (Lcom/itextpdf/text/pdf/PdfReader;) in Lme/moop/mytwitter/MainActivity$CheckScheduleChangeTask;
07-27 09:15:13.004: D/dalvikvm(222): VFY: replacing opcode 0x22 at 0x0002
07-27 09:15:13.004: D/dalvikvm(222): Making a copy of Lme/moop/mytwitter/MainActivity$CheckScheduleChangeTask;.doInBackground code (137 bytes)
07-27 09:15:13.004: E/dalvikvm(222): Could not find class 'com.itextpdf.text.pdf.parser.PdfReaderContentParser', referenced from method me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground
07-27 09:15:13.004: W/dalvikvm(222): VFY: unable to resolve new-instance 411 (Lcom/itextpdf/text/pdf/parser/PdfReaderContentParser;) in Lme/moop/mytwitter/MainActivity$CheckScheduleChangeTask;
07-27 09:15:13.004: D/dalvikvm(222): VFY: replacing opcode 0x22 at 0x000a
07-27 09:15:13.045: W/dalvikvm(222): threadid=15: thread exiting with uncaught exception (group=0x4001b188)
07-27 09:15:13.045: E/AndroidRuntime(222): Uncaught handler: thread AsyncTask #1 exiting due to uncaught exception
07-27 09:15:13.135: E/AndroidRuntime(222): java.lang.RuntimeException: An error occured while executing doInBackground()
07-27 09:15:13.135: E/AndroidRuntime(222):  at android.os.AsyncTask$3.done(AsyncTask.java:200)
07-27 09:15:13.135: E/AndroidRuntime(222):  at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
07-27 09:15:13.135: E/AndroidRuntime(222):  at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
07-27 09:15:13.135: E/AndroidRuntime(222):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
07-27 09:15:13.135: E/AndroidRuntime(222):  at java.util.concurrent.FutureTask.run(FutureTask.java:137)
07-27 09:15:13.135: E/AndroidRuntime(222):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
07-27 09:15:13.135: E/AndroidRuntime(222):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
07-27 09:15:13.135: E/AndroidRuntime(222):  at java.lang.Thread.run(Thread.java:1096)
07-27 09:15:13.135: E/AndroidRuntime(222): Caused by: java.lang.NoClassDefFoundError: com.itextpdf.text.pdf.PdfReader
07-27 09:15:13.135: E/AndroidRuntime(222):  at me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground(MainActivity.java:84)
07-27 09:15:13.135: E/AndroidRuntime(222):  at me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground(MainActivity.java:1)
07-27 09:15:13.135: E/AndroidRuntime(222):  at android.os.AsyncTask$2.call(AsyncTask.java:185)
07-27 09:15:13.135: E/AndroidRuntime(222):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
07-27 09:15:13.135: E/AndroidRuntime(222):  ... 4 more
07-27 09:15:13.164: I/dalvikvm(222): threadid=7: reacting to signal 3
07-27 09:15:13.394: I/dalvikvm(222): Wrote stack trace to '/data/anr/traces.txt'
07-27 09:15:16.894: I/Process(222): Sending signal. PID: 222 SIG: 9
07-27 09:17:59.094: E/dalvikvm(252): Could not find class 'com.itextpdf.text.pdf.PdfReader', referenced from method me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground
07-27 09:17:59.094: W/dalvikvm(252): VFY: unable to resolve new-instance 410 (Lcom/itextpdf/text/pdf/PdfReader;) in Lme/moop/mytwitter/MainActivity$CheckScheduleChangeTask;
07-27 09:17:59.094: D/dalvikvm(252): VFY: replacing opcode 0x22 at 0x0002
07-27 09:17:59.094: D/dalvikvm(252): Making a copy of Lme/moop/mytwitter/MainActivity$CheckScheduleChangeTask;.doInBackground code (137 bytes)
07-27 09:17:59.094: E/dalvikvm(252): Could not find class 'com.itextpdf.text.pdf.parser.PdfReaderContentParser', referenced from method me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground
07-27 09:17:59.094: W/dalvikvm(252): VFY: unable to resolve new-instance 411 (Lcom/itextpdf/text/pdf/parser/PdfReaderContentParser;) in Lme/moop/mytwitter/MainActivity$CheckScheduleChangeTask;
07-27 09:17:59.094: D/dalvikvm(252): VFY: replacing opcode 0x22 at 0x000a
07-27 09:17:59.124: W/dalvikvm(252): threadid=15: thread exiting with uncaught exception (group=0x4001b188)
07-27 09:17:59.124: E/AndroidRuntime(252): Uncaught handler: thread AsyncTask #1 exiting due to uncaught exception
07-27 09:17:59.134: E/AndroidRuntime(252): java.lang.RuntimeException: An error occured while executing doInBackground()
07-27 09:17:59.134: E/AndroidRuntime(252):  at android.os.AsyncTask$3.done(AsyncTask.java:200)
07-27 09:17:59.134: E/AndroidRuntime(252):  at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
07-27 09:17:59.134: E/AndroidRuntime(252):  at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
07-27 09:17:59.134: E/AndroidRuntime(252):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
07-27 09:17:59.134: E/AndroidRuntime(252):  at java.util.concurrent.FutureTask.run(FutureTask.java:137)
07-27 09:17:59.134: E/AndroidRuntime(252):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
07-27 09:17:59.134: E/AndroidRuntime(252):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
07-27 09:17:59.134: E/AndroidRuntime(252):  at java.lang.Thread.run(Thread.java:1096)
07-27 09:17:59.134: E/AndroidRuntime(252): Caused by: java.lang.NoClassDefFoundError: com.itextpdf.text.pdf.PdfReader
07-27 09:17:59.134: E/AndroidRuntime(252):  at me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground(MainActivity.java:70)
07-27 09:17:59.134: E/AndroidRuntime(252):  at me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground(MainActivity.java:1)
07-27 09:17:59.134: E/AndroidRuntime(252):  at android.os.AsyncTask$2.call(AsyncTask.java:185)
07-27 09:17:59.134: E/AndroidRuntime(252):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
07-27 09:17:59.134: E/AndroidRuntime(252):  ... 4 more
07-27 09:17:59.521: I/dalvikvm(252): threadid=7: reacting to signal 3
07-27 09:17:59.794: I/dalvikvm(252): Wrote stack trace to '/data/anr/traces.txt'
07-27 09:18:02.743: I/Process(252): Sending signal. PID: 252 SIG: 9
07-27 09:26:26.713: E/dalvikvm(280): Could not find class 'com.itextpdf.text.pdf.PdfReader', referenced from method me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground
07-27 09:26:26.723: W/dalvikvm(280): VFY: unable to resolve new-instance 410 (Lcom/itextpdf/text/pdf/PdfReader;) in Lme/moop/mytwitter/MainActivity$CheckScheduleChangeTask;
07-27 09:26:26.723: D/dalvikvm(280): VFY: replacing opcode 0x22 at 0x0001
07-27 09:26:26.723: D/dalvikvm(280): Making a copy of Lme/moop/mytwitter/MainActivity$CheckScheduleChangeTask;.doInBackground code (93 bytes)
07-27 09:26:26.723: I/dalvikvm(280): Could not find method com.itextpdf.text.pdf.parser.PdfTextExtractor.getTextFromPage, referenced from method me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground
07-27 09:26:26.723: W/dalvikvm(280): VFY: unable to resolve static method 2969: Lcom/itextpdf/text/pdf/parser/PdfTextExtractor;.getTextFromPage (Lcom/itextpdf/text/pdf/PdfReader;I)Ljava/lang/String;
07-27 09:26:26.723: D/dalvikvm(280): VFY: replacing opcode 0x71 at 0x000a
07-27 09:26:26.754: W/dalvikvm(280): threadid=15: thread exiting with uncaught exception (group=0x4001b188)
07-27 09:26:26.754: E/AndroidRuntime(280): Uncaught handler: thread AsyncTask #1 exiting due to uncaught exception
07-27 09:26:26.763: E/AndroidRuntime(280): java.lang.RuntimeException: An error occured while executing doInBackground()
07-27 09:26:26.763: E/AndroidRuntime(280):  at android.os.AsyncTask$3.done(AsyncTask.java:200)
07-27 09:26:26.763: E/AndroidRuntime(280):  at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
07-27 09:26:26.763: E/AndroidRuntime(280):  at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
07-27 09:26:26.763: E/AndroidRuntime(280):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
07-27 09:26:26.763: E/AndroidRuntime(280):  at java.util.concurrent.FutureTask.run(FutureTask.java:137)
07-27 09:26:26.763: E/AndroidRuntime(280):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
07-27 09:26:26.763: E/AndroidRuntime(280):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
07-27 09:26:26.763: E/AndroidRuntime(280):  at java.lang.Thread.run(Thread.java:1096)
07-27 09:26:26.763: E/AndroidRuntime(280): Caused by: java.lang.NoClassDefFoundError: com.itextpdf.text.pdf.PdfReader
07-27 09:26:26.763: E/AndroidRuntime(280):  at me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground(MainActivity.java:68)
07-27 09:26:26.763: E/AndroidRuntime(280):  at me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground(MainActivity.java:1)
07-27 09:26:26.763: E/AndroidRuntime(280):  at android.os.AsyncTask$2.call(AsyncTask.java:185)
07-27 09:26:26.763: E/AndroidRuntime(280):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
07-27 09:26:26.763: E/AndroidRuntime(280):  ... 4 more
07-27 09:26:27.063: I/dalvikvm(280): threadid=7: reacting to signal 3
07-27 09:26:27.404: I/dalvikvm(280): Wrote stack trace to '/data/anr/traces.txt'
07-27 09:46:50.573: E/dalvikvm(308): Could not find class 'com.itextpdf.text.pdf.PdfReader', referenced from method me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground
07-27 09:46:50.573: W/dalvikvm(308): VFY: unable to resolve new-instance 410 (Lcom/itextpdf/text/pdf/PdfReader;) in Lme/moop/mytwitter/MainActivity$CheckScheduleChangeTask;
07-27 09:46:50.573: D/dalvikvm(308): VFY: replacing opcode 0x22 at 0x0001
07-27 09:46:50.573: D/dalvikvm(308): Making a copy of Lme/moop/mytwitter/MainActivity$CheckScheduleChangeTask;.doInBackground code (97 bytes)
07-27 09:46:50.573: I/dalvikvm(308): Could not find method com.itextpdf.text.pdf.parser.PdfTextExtractor.getTextFromPage, referenced from method me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground
07-27 09:46:50.573: W/dalvikvm(308): VFY: unable to resolve static method 2969: Lcom/itextpdf/text/pdf/parser/PdfTextExtractor;.getTextFromPage (Lcom/itextpdf/text/pdf/PdfReader;I)Ljava/lang/String;
07-27 09:46:50.583: D/dalvikvm(308): VFY: replacing opcode 0x71 at 0x000a
07-27 09:46:50.624: W/dalvikvm(308): threadid=15: thread exiting with uncaught exception (group=0x4001b188)
07-27 09:46:50.624: E/AndroidRuntime(308): Uncaught handler: thread AsyncTask #1 exiting due to uncaught exception
07-27 09:46:50.634: E/AndroidRuntime(308): java.lang.RuntimeException: An error occured while executing doInBackground()
07-27 09:46:50.634: E/AndroidRuntime(308):  at android.os.AsyncTask$3.done(AsyncTask.java:200)
07-27 09:46:50.634: E/AndroidRuntime(308):  at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
07-27 09:46:50.634: E/AndroidRuntime(308):  at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
07-27 09:46:50.634: E/AndroidRuntime(308):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
07-27 09:46:50.634: E/AndroidRuntime(308):  at java.util.concurrent.FutureTask.run(FutureTask.java:137)
07-27 09:46:50.634: E/AndroidRuntime(308):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
07-27 09:46:50.634: E/AndroidRuntime(308):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
07-27 09:46:50.634: E/AndroidRuntime(308):  at java.lang.Thread.run(Thread.java:1096)
07-27 09:46:50.634: E/AndroidRuntime(308): Caused by: java.lang.NoClassDefFoundError: com.itextpdf.text.pdf.PdfReader
07-27 09:46:50.634: E/AndroidRuntime(308):  at me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground(MainActivity.java:68)
07-27 09:46:50.634: E/AndroidRuntime(308):  at me.moop.mytwitter.MainActivity$CheckScheduleChangeTask.doInBackground(MainActivity.java:1)
07-27 09:46:50.634: E/AndroidRuntime(308):  at android.os.AsyncTask$2.call(AsyncTask.java:185)
07-27 09:46:50.634: E/AndroidRuntime(308):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
07-27 09:46:50.634: E/AndroidRuntime(308):  ... 4 more
07-27 09:46:51.105: I/dalvikvm(308): threadid=7: reacting to signal 3
07-27 09:46:51.423: I/dalvikvm(308): Wrote stack trace to '/data/anr/traces.txt'
07-27 09:46:54.444: I/Process(308): Sending signal. PID: 308 SIG: 9

It seems like there's something wrong with the imports. Does anyone know how to fix this?

THANK YOU!

@PadmaKumar I already did that, I did project>properties>java build path> add external JARs> itextpdf-5.3.0.jar. That's correct, isn't it? — Xander, Jul 28 '12 at 07:59
@PadmaKumar I only added the .jar file. Is there anything else I have to add? — Xander, Jul 28 '12 at 08:13

score 1 · Accepted Answer · edited May 23 '17 at 12:33

1

It did it using iText, it's extremely easy. However, if someone has a question about it, just ask me.

BTW The solution of the question above is here: https://stackoverflow.com/a/10046725/1289716

edited May 23 '17 at 12:33

Community

1
1

answered Aug 02 '12 at 18:48

Xander

5,487
14
49
77

Hello. I got a question about iText and its about Extracting Text same as your post but the difference the PDF-file is from the device. http://stackoverflow.com/questions/13005071/reading-pdf-document-using-itext-in-android this is my question. – Christian Eric Paran Oct 22 '12 at 05:33
@ChristianEricParan You've got an answer :) – Xander Oct 22 '12 at 18:31

Dhruvil Patel · Answer 2 · 2012-07-27T10:24:05.043

0

You can use this simple example of creating pdf from text :)

Use the library droidtext0.2jar .. available on the site .

Edited

you added your library to build path ? If not then add it .

edited Jul 27 '12 at 10:24

answered Jul 27 '12 at 10:10

Dhruvil Patel

2,910
2
22
39

That's not my question. My question is about extracting. – Xander Jul 27 '12 at 10:21
Yes, i did. I did: project>properties>java build path> add external JARs> itextpdf-5.3.0.jar. Is that correct? – Xander Jul 27 '12 at 10:27
Is my notation of the url maybe incorrect? Does it have to be a file which has already been downloaded? – Xander Jul 27 '12 at 10:42

score -1 · Answer 3 · answered Jul 27 '12 at 10:12

-1

You might need to import these as well:

import com.lowagie.text.BadElementException; 
import com.lowagie.text.Document; 
import com.lowagie.text.DocumentException; 
import com.lowagie.text.Image; 
import com.lowagie.text.pdf.BaseFont; 
import com.lowagie.text.pdf.PdfContentByte; 
import com.lowagie.text.pdf.PdfWriter;

answered Jul 27 '12 at 10:12

ricardoespsanto

1,000
10
34

The `com.lowagie` hierarchy was replaced by `com.itextpdf` in iText 5. Any import of a class in (a subpackage of) `com.lowagie` refers to a pre-5 version of iText. – Alexis Pigeon Jul 27 '12 at 10:50
Ok, I get it. So it won't matter if I use `com.lowagie` or `com.itextpdf` – Xander Jul 27 '12 at 18:00

pdf extracting with iText error occured

3 Answers3