(摘) flutter第三方组件

Flutter Login

https://pub.dev/packages/flutter_login
效果不错的登陆界面

看起来不错，然尔我却没有运行起来。

Animate do

https://pub.dev/packages/animate_do/
动画库

Onboarding overlay

https://pub.dev/packages/onboarding_overlay
新手引导功能

path_provider 文件读写

网文

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:path_provider/path_provider.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {

  String name = "Jimi";

  /// 获取文档目录文件
  Future<File> _getLocalDocumentFile() async {
    final dir = await getApplicationDocumentsDirectory();
    return File('${dir.path}/str.txt');
  }

  /// 获取临时目录文件
  Future<File> _getLocalTemporaryFile() async {
    final dir = await getTemporaryDirectory();
    return File('${dir.path}/str.txt');
  }

  /// 获取应用程序目录文件
  Future<File> _getLocalSupportFile() async {
    final dir = await getApplicationSupportDirectory();
    return File('${dir.path}/str.txt');
  }

  /// 读取值
  Future<void> readString() async {
    try {

      final file = await _getLocalDocumentFile();
      final result  = await file.readAsString();
      print("result-----$result");

      final file1 = await _getLocalTemporaryFile();
      final result1  = await file1.readAsString();
      print("result1-----$result1");

      final file2 = await _getLocalSupportFile();
      final result2  = await file2.readAsString();
      print("result2-----$result2");


    } catch (e) {
      print(e);
    }
  }

  /// 写入数据
  Future<void> writeString(String str) async {
    final file = await _getLocalDocumentFile();
    await file.writeAsString(name);
    print(file.path);

    final file1 = await _getLocalTemporaryFile();
    await file1.writeAsString(name);
    print(file1.path);


    final file2 = await _getLocalSupportFile();
    await file2.writeAsString(name);
    print(file2.path);

    print("写入成功");
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        appBar: AppBar(title: Text("path_provider"),),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Text(name,
                style: const TextStyle(
                    color: Colors.pink,
                    fontSize: 30
                ),
              ),
              const SizedBox(height: 20),
              ElevatedButton(
                onPressed: (){
                  writeString(name);
                },
                child: const Text("存入本地目录"),
              ),
              ElevatedButton(
                onPressed: (){
                  readString();
                },
                child: Text("读取值"),
              ),
            ],
          ),
        ),
      )
    );
  }
}

BottomNavyBar

精美动感的底部导航

import 'package:bottom_navy_bar/bottom_navy_bar.dart';
import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _currentIndex = 0;
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Flutter Demo")),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text('You have pushed the button this many times:'),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
      bottomNavigationBar: BottomNavyBar(
        selectedIndex: _currentIndex,
        showElevation: true,
        itemCornerRadius: 24,
        curve: Curves.easeIn,
        onItemSelected: (index) => setState(() => _currentIndex = index),
        items: <BottomNavyBarItem>[
          BottomNavyBarItem(
            icon: Icon(Icons.apps),
            title: Text('Home'),
            activeColor: Colors.red,
            textAlign: TextAlign.center,
          ),
          BottomNavyBarItem(
            icon: Icon(Icons.people),
            title: Text('Users'),
            activeColor: Colors.purpleAccent,
            textAlign: TextAlign.center,
          ),
          BottomNavyBarItem(
            icon: Icon(Icons.message),
            title: Text(
              'Messages test for mes teset test test ',
            ),
            activeColor: Colors.pink,
            textAlign: TextAlign.center,
          ),
          BottomNavyBarItem(
            icon: Icon(Icons.settings),
            title: Text('Settings'),
            activeColor: Colors.blue,
            textAlign: TextAlign.center,
          ),
        ],
      ),
    );
  }
}