android - 在 Flutter 应用程序中创建自定义文本选择操作

Question

我想将在其他应用中选择的文本传输到我的 Flutter 应用。

例如我正在阅读网站、电子书阅读器或其他应用程序中的一些文本，我从应用程序中选择一段文本，然后通过单击选择后出现的上下文菜单中的自定义元素将其发送到我的应用程序

在许多资源中，我发现这可以通过使用 ACTION_PROCESS_TEXT 在 Android 中完成，但问题是我不知道如何在我的应用程序中集成和使用此功能。

我找到并安装了 Intent假装能够添加此功能的包(here 他们写道他们支持它)

在下图中，您可以在上下文菜单中看到“Web Search”和“Search Wikipedia”——我想要的是能够添加“My App Action”，这将打开我的 Flutter 应用程序并使用选定的文本。

我当前的 main.dart 应用的代码:

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

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.deepOrange,
      ),
      home: MyHomePage(title: 'My Words'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

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

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          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),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

附言我刚开始学习 Flutter 和移动应用程序开发，所以请不要苛刻地评判我。

Answer 1

我做了一个插件来实现这个。

请查看:action_process_text Plugin .

首先，将其包含在您的项目中。

dependencies:
  action_process_text: <latest version>

运行 pub get 并获取包。

将此添加到 android\app\src\main\ 文件夹中的 AndroidManifest.xml。

 <activity android:name="com.example.action_process_text.ActionProcessTextPlugin"
            android:label="Action_Text" android:theme="@style/LaunchTheme">
            <intent-filter>
                <action android:name="android.intent.action.PROCESS_TEXT" />
                <data android:mimeType="text/plain"/>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
   </activity>

将 android:label 从 Action_Text 更改为您要显示的操作文本。

然后导入包即可使用。

import 'package:action_process_text/action_process_text.dart';

现在，使用小部件的构造函数来初始化 action_process_text。 ActionProcessText.getInputText 用于从 android 操作中获取选定的文本。

示例 fragment :

class MainPage extends StatefulWidget {
  @override
  _MainPageState createState() => _MainPageState();
}

class _MainPageState extends State<MainPage> {
  _MainPageState() {
    initActionProcessText();
  }

  Future<void> initActionProcessText() async {
    inputText = await ActionProcessText.getInputText;
    setState(() {});
  }

  String inputText = '';

  @override
  Widget build(BuildContext context) {
    return Scaffold();
  }
  }

并查看我关于此插件的文章:Article on action_process_text .

请通过让其他 flutter 开发人员了解它来支持这个包，并随时在我的 github 存储库上打开问题/错误和 PR:action_process_text Source .