pdf_text 0.1.1

A Flutter plugin used to extract text from PDF documents.

example/lib/main.dart

import 'dart:io';
import 'dart:math';

import 'package:file_picker/file_picker.dart';
import 'package:flutter/material.dart';
import 'dart:async';

import 'package:pdf_text/pdf_text.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {

  PDFDoc _pdfDoc;
  String _text = "";

  bool _buttonsEnabled = true;

  @override
  void initState() {
    super.initState();
  }



  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('PDF Text Example'),
        ),
        body: Container(
          alignment: Alignment.center,
          padding: EdgeInsets.all(10),
          child: ListView(
            children: <Widget>[
              FlatButton(
                child: Text("Pick PDF document",
                  style: TextStyle(color: Colors.white),),
                color: Colors.blueAccent,
                onPressed: _pickPDFText,
                padding: EdgeInsets.all(5),
              ),
              FlatButton(
                child: Text("Read random page",
                  style: TextStyle(color: Colors.white),),
                color: Colors.blueAccent,
                onPressed: _buttonsEnabled ? _readRandomPage : () {},
                padding: EdgeInsets.all(5),
              ),
              FlatButton(
                child: Text("Read whole document",
                  style: TextStyle(color: Colors.white),),
                color: Colors.blueAccent,
                onPressed: _buttonsEnabled ? _readWholeDoc : () {},
                padding: EdgeInsets.all(5),
              ),

              Padding(
                child: Text(_pdfDoc == null ? "Pick a new PDF document and wait for it to load..."
                    : "PDF document loaded, ${_pdfDoc.length} pages\n",
                  style: TextStyle(fontSize: 18),
                  textAlign: TextAlign.center,),
                padding: EdgeInsets.all(15),
              ),
              Padding(
                child: Text(_text == "" ? "" : "Text:",
                  style: TextStyle(fontSize: 18),
                  textAlign: TextAlign.center,),
                padding: EdgeInsets.all(15),
              ),
              Text(_text),


            ],
          ),
        )

      ),
    );
  }

  /// Picks a new PDF document from the device
  Future _pickPDFText() async {
    File file = await FilePicker.getFile();
    _pdfDoc = await PDFDoc.fromFile(file);
    setState(() {});
  }

  /// Reads a random page of the document
  Future _readRandomPage() async {
    if (_pdfDoc == null) {
      return;
    }
    setState(() {
      _buttonsEnabled = false;
    });

    String text = await _pdfDoc.pageAt(Random().nextInt(_pdfDoc.length)+1).text;

    setState(() {
      _text = text;
      _buttonsEnabled = true;
    });
  }

  /// Reads the whole document
  Future _readWholeDoc() async {
    if (_pdfDoc == null) {
      return;
    }
    setState(() {
      _buttonsEnabled = false;
    });

    String text = await _pdfDoc.text;

    setState(() {
      _text = text;
      _buttonsEnabled = true;
    });
  }

}