如何从Flutter应用程序中打开应用程序? [英] How to open an application from a Flutter app?

问题描述

我正在开发Flutter应用程序，需要在其中向用户显示导航.那么，如何像在Android中使用外部意图那样从Flutter应用程序中打开地图应用程序?

I am developing a Flutter app, in which I need to show navigation to the user for a place. So, how can I open a map application from my Flutter app like we do using external intent in Android?

还是他们有任何Flutter插件?

Or their is any flutter-plugin for it?

推荐答案

我建议您使用 url_launcher 飞镖包.

通过这种方式，您可以使用所有url模式(如您的情况那样打开phone，sms甚至maps).

In this way you can use all url schemas to open (phone, sms, and even maps as in your case).

要在Android和iOS中打开Goog​​le Maps，您可以使用常规Android Maps Hemanth Raj所建议的URI模式.

In order to open Google Maps either in Android and iOS you could use the general Android Maps URI schema as suggested by Hemanth Raj.

_openMap() async {
    const url = 'https://www.google.com/maps/search/?api=1&query=52.32,4.917';
    if (await canLaunch(url)) {
      await launch(url);
    } else {
      throw 'Could not launch $url';
    }
  }

如果要在Android上做出选择，则可以使用常规的 geo: URI模式.

If you want to give a choice on Android you could use the general geo: URI schema.

如果要专门打开iOS Maps API，可以使用

If you want specifically open iOS Maps API you can use Cupertino Maps URI schema.

如果您选择区分Android和iOS(不对所有平台使用Google Maps Api架构)，则还必须在打开的地图调用中按以下方式进行操作:

If you choose to distinguish between Android and iOS (not using Google Maps Api schema for all platform) you have to do it also in your open map call in a way like this:

_openMap() async {
    // Android
    const url = 'geo:52.32,4.917';
    if (await canLaunch(url)) {
      await launch(url);
    } else {
      // iOS
      const url = 'http://maps.apple.com/?ll=52.32,4.917';
      if (await canLaunch(url)) {
        await launch(url);
      } else {
        throw 'Could not launch $url';
      }
    }
  }

或者您可以使用 dart.io库Platform类:

Or you can check the OS at runtime with dart.io library Platform class:

import 'dart:io';

_openMap() async {
    // Android
    var url = 'geo:52.32,4.917';
    if (Platform.isIOS) {
      // iOS
      url = 'http://maps.apple.com/?ll=52.32,4.917';
    }
    if (await canLaunch(url)) {
      await launch(url);
    } else {
      throw 'Could not launch $url';
    }
  }

现在我完成了软管维护(真正的工作……没有一些代码重构……^^')，我可以完成我的回答了.

Now that I finished hosekeeping (the real one... not some code refactoring... ^^') I can finish my answer.

正如我在开始使用url_launcher时告诉您的那样，您可以使用所有URI模式来进行呼叫，发送短信，发送电子邮件等.

As I tell you at the beginning with url_launcher you can use all URI Schemas in order to call, send sms, send e-mail etc.

这里有一些代码可以做到这一点:

Here some code to do that:

_sendMail() async {
    // Android and iOS
    const uri = 'mailto:[e-mail]?subject=Greetings&body=Hello%20World';
    if (await canLaunch(uri)) {
      await launch(uri);
    } else {
    throw 'Could not launch $uri';
    }
  }

  _callMe() async {
    // Android
    const uri = 'tel:[phone]';
    if (await canLaunch(uri)) {
      await launch(uri);
    } else {
      // iOS
      const uri = 'tel:[phone]';
      if (await canLaunch(uri)) {
        await launch(uri);
      } else {
        throw 'Could not launch $uri';
      }
    }
  }

  _textMe() async {
    // Android
    const uri = 'sms:[phone]';
    if (await canLaunch(uri)) {
      await launch(uri);
    } else {
      // iOS
      const uri = 'sms:0039-222-060-888';
      if (await canLaunch(uri)) {
        await launch(uri);
      } else {
        throw 'Could not launch $uri';
      }
    }
  }

即使 URI 模式也应该是标准(RFC)，有时authority和其中的某些部分在不同的框架(Android或iOS)之间可能会有所不同.

Even if URI schema should be standards (RFC) sometimes the authority and path parts of them could differ between frameworks (Android or iOS).

所以在这里我例外地管理不同的操作系统，但是，您可以使用

So here I manage the different OSes with exception but, you could do it better with dart.io library Platform class:

import 'dart:io'

，然后输入代码:

if (Platform.isAndroid) {

} else if (Platform.isIOS) {

}

我建议您始终在两种环境中对其进行测试.

I suggest you always test them in both environments.

您可以在此处检查Android和iOS架构文档:

You can check the Android and iOS schema documenation here:

• Android

• Android
• iOS

如果您想在Android中类似于startActivity(但仅适用于Android平台)，则可以使用dart包

If you wanna something similar to startActivity in Android (but that works only for Android platform) you can use the dart package android_intent.

这篇关于如何从Flutter应用程序中打开应用程序?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！