flutter中如何实现deeplink

安卓支持两种app links 和deep links
app links需要是scheme需要指定https，并且要增加hosts文件assetlinks.json，还需要服务端配合。
deep links可以自定义scheme，也不要服务端的验证
为了支持deeplink, 需要在android/app/src/main/AndroidManifest.xml中加入如下代码：
```
<manifest ...>

  <!-- Deep Links -->
  <intent-filter>
    <action android:name="android.intent.action.VIEW" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />
    <!-- Accepts URIs that begin with YOUR_SCHEME://YOUR_HOST -->
    <data
      android:scheme="[YOUR_SCHEME]"
      android:host="[YOUR_HOST]" />
  </intent-filter>

  <!-- App Links -->
  <intent-filter android:autoVerify="true">
    <action android:name="android.intent.action.VIEW" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />
    <!-- Accepts URIs that begin with https://YOUR_HOST -->
    <data
      android:scheme="https"
      android:host="[YOUR_HOST]" />
  </intent-filter>
</activity>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <!-- ... other keys -->
  <key>com.apple.developer.associated-domains</key>
  <array>
    <string>applinks:[YOUR_HOST]</string>
  </array>
  <!-- ... other keys -->
</dict>
</plist>

<?xml ...>
<!-- ... other tags -->
<plist>
<dict>
  <!-- ... other tags -->
  <key>CFBundleURLTypes</key>
  <array>
    <dict>
      <key>CFBundleTypeRole</key>
      <string>Editor</string>
      <key>CFBundleURLName</key>
      <string>[ANY_URL_NAME]</string>
      <key>CFBundleURLSchemes</key>
      <array>
        <string>[YOUR_SCHEME]</string>
      </array>
    </dict>
  </array>
  <!-- ... other tags -->
</dict>
</plist>

    // Uri parsing may fail, so we use a try/catch FormatException.
    try {
      final initialUri = await getInitialUri();
      // Use the uri and warn the user, if it is not correct,
      // but keep in mind it could be `null`.
    } on FormatException {
      // Handle exception by warning the user their action did not succeed
      // return?
    }
    // ... other exception handling like PlatformException

```dart
#### 监听链接变化
import 'dart:async';
import 'dart:io';

import 'package:uni_links/uni_links.dart';

// ...

  StreamSubscription _sub;

  Future<void> initUniLinks() async {
    // ... check initialLink

    // Attach a listener to the stream
    _sub = linkStream.listen((String? link) {
      // Parse the link and warn the user, if it is not correct
    }, onError: (err) {
      // Handle exception by warning the user their action did not succeed
    });

    // NOTE: Don't forget to call _sub.cancel() in dispose()
  }

// ...