This is a Flutter plugin for WearOS devices

Features

• Helps in getting the shape (square or round) of the watch face
• Handles the mode changes, Active Mode and Ambient Mode

More features will be arriving soon.

EXAMPLE APP

NOTE: The project is not using Fluter Embedding v2

Usage

• Add the dependency flutter_wear to your pubspec.yaml file.

• Go to <project root>/android/app/build.gradle and set the minSdkVersion to 23:

  minSdkVersion 23

• Also add the following dependencies to the same file:

  dependencies {
    // Wear dependencies
    implementation 'com.android.support:wear:27.1.1'
    implementation 'com.google.android.support:wearable:2.3.0'
    compileOnly 'com.google.android.wearable:wearable:2.3.0'
  }

• Go to <project root>/android/app/src/main/AndroidManifest.xml and add the following inside the manifest tag:

  <!-- Required for ambient mode support -->
  <uses-permission android:name="android.permission.WAKE_LOCK" />
  
  <!-- Flags the app as a Wear app -->
  <uses-feature android:name="android.hardware.type.watch" />

• Inside the same file, update the contents of the application tag like this:

  <!-- KEEP THE application tag ATTRIBUTES AS IT IS -->
  <application
        android:name="io.flutter.app.FlutterApplication"
        android:label="wear_demo"
        android:icon="@mipmap/ic_launcher">
  
        <!-- REPLACE THE PART STARTING FROM BELOW -->
        <!-- Flags that the app doesn't require a companion phone app -->
        <meta-data
        android:name="com.google.android.wearable.standalone"
        android:value="true" />
  
        <activity
            android:name=".MainActivity"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize">
  
            <meta-data
              android:name="io.flutter.app.android.NormalTheme"
              android:resource="@style/NormalTheme"
              />
  
            <meta-data
              android:name="io.flutter.app.android.SplashScreenDrawable"
              android:resource="@drawable/launch_background"
              />
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <!-- TILL THE ABOVE LINE -->
    </application>

• Go to <project root>/android/app/src/main/kotlin/<app_id>/MainActivity.kt and update the MainActivity code as following:

  // Except the package name
  // Replace everything
  
  import android.os.Bundle
  
  // Do not import this package: 
  // io.flutter.embedding.android.FlutterActivity
  
  // Make sure that you import the exact same packages here
  import io.flutter.app.FlutterActivity
  import io.flutter.plugins.GeneratedPluginRegistrant
  
  import androidx.wear.ambient.AmbientMode
  
  // Here, replace the app id with yours or, 
  // just open the android folder using Android Studio & 
  // import the following two packages
  import com.souvikbiswas.flutter_wear.FlutterAmbientCallback
  import com.souvikbiswas.flutter_wear.getChannel
  
  class MainActivity: FlutterActivity(), AmbientMode.AmbientCallbackProvider {
      override fun onCreate(savedInstanceState: Bundle?) {
          super.onCreate(savedInstanceState)
          GeneratedPluginRegistrant.registerWith(this)
  
          // Wire up the activity for ambient callbacks
          AmbientMode.attachAmbientSupport(this)
      }
  
      override fun getAmbientCallback(): AmbientMode.AmbientCallback {
          return FlutterAmbientCallback(getChannel(flutterView))
      }
  }

Widgets

There are three primary widgets:

• WearShape: Determines the shape of the watch face, whether it is square or round.
• WearMode: Determines the current mode of the watch (Active Mode or Ambient Mode). The widgets inside it rebuilds whenever the mode changes.
• WearInheritedShape: It can be used for passing the shape of the watch down the widget tree.

Example

import 'package:flutter/material.dart';
import 'package:flutter_wear/mode.dart';
import 'package:flutter_wear/shape.dart';
import 'package:flutter_wear/wear_mode.dart';
import 'package:flutter_wear/wear_shape.dart';

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  Color _containerColor;
  Color _textColor;

  @override
  void initState() {
    super.initState();

    _containerColor = Colors.white;
    _textColor = Colors.black;
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: WearShape(
            builder: (context, shape) => WearMode(builder: (context, mode) {
              if (mode == Mode.active) {
                _containerColor = Colors.white;
                _textColor = Colors.black;
              } else {
                _containerColor = Colors.black;
                _textColor = Colors.white;
              }
              return Container(
                color: _containerColor,
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    Row(),
                    FlutterLogo(size: 100),
                    Text(
                      'Shape: ${shape == Shape.round ? 'round' : 'square'}',
                      style: TextStyle(color: _textColor),
                    ),
                    Text(
                      'Mode: ${mode == Mode.active ? 'Active' : 'Ambient'}',
                      style: TextStyle(color: _textColor),
                    ),
                  ],
                ),
              );
            }),
          ),
        ),
      ),
    );
  }
}

License

Copyright (c) 2020 Souvik Biswas

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.