pdf_text 0.3.0

This plugin for Flutter allows you to read the text content of PDF documents and convert it into strings. It works on iOS and Android.

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;
    });
  }
}