Question

我正在使用expo开发应用程序。我想使用expo-notifications在我的应用程序中发送和接收推送通知。我已经集成了expo-notification，并且已成功接收通知，但没有声音和弹出警报。我总是必须向下滚动通知面板，然后才能看到通知。这是我的通知注册代码

async function registerForPushNotificationsAsync() {
    let token;
    if (Constants.isDevice) {
        const { status: existingStatus } = await Permissions.getAsync(Permissions.NOTIFICATIONS);
        let finalStatus = existingStatus;
        if (existingStatus !== 'granted') {
            const { status } = await Permissions.askAsync(Permissions.NOTIFICATIONS);
            finalStatus = status;
        }
        if (finalStatus !== 'granted') {
            alert('Failed to get push token for push notification!');
            return;
        }
        token = (await Notifications.getExpoPushTokenAsync()).data;
        console.log(token);
    } else {
        alert('Must use physical device for Push Notifications');
    }

    if (Platform.OS === 'android') {
        Notifications.setNotificationChannelAsync('default', {
            name: 'default',
            importance: Notifications.AndroidImportance,
            vibrationPattern: [0, 250, 250, 250],
            lightColor: '#FF231F7C',
        });
    }
    return token;
}

这是我的UseEffect，用于注册和监听通知

useEffect(() => {
    _gettingRestaurants();

    registerForPushNotificationsAsync().then(token => setExpoPushToken(token));

    // This listener is fired whenever a user taps on or interacts with a notification (works when app is foregrounded, backgrounded, or killed)
    Notifications.addNotificationReceivedListener((notification)=>{
        alert(notification);
    });
    Notifications.addNotificationResponseReceivedListener((response)=>{
        alert(response);
    });
    
}, [isDataFetched])

还有一件事，这些听众也无法正常工作。我没有从这两个警报中看到任何警报。请帮帮我。

谢谢！

Answer 1

为使听众正常工作，请尝试：

将此添加到您的app.json

{
  "expo": {
    ...
    "android": {
      ...
      "useNextNotificationsApi": true,
    }
  }
}

起初我不起作用，但是在指定权限后，它起作用了：

{
  "expo": {
    ...
    "android": {
      ...
      "useNextNotificationsApi": true,
      "permissions": ["RECEIVE_BOOT_COMPLETED"]
    }
  }
}

而且，如果它不起作用（不是针对我的Main项目，而是针对另一个项目），则可以尝试使用使用addListener的旧式通知系统：

import * as Notifications from 'expo-notifications';
import { Notifications as Notifications2 } from 'expo';

Notifications.addNotificationReceivedListener((notification) => {
  // New Notifications. Didn't work sometimes
});

Notifications2.addListener((data) => {
  // Legacy notifications. You get a deprecation warning, but works when the new Notifications don't
});

还检查当后台关闭应用程序时（在导入通知之后），是否可以帮助您获取通知

Notifications.setNotificationHandler({
  handleNotification: async () => ({
    shouldShowAlert: true,
    shouldPlaySound: true,
    shouldSetBadge: false,
  }),
});

要获取声音通知： 如果在应用程序处于后台时期望它们，则需要使用setNotificationHandler定义shouldPlaySound: true。您还需要在通知中指定要播放的声音，如下所示：

const message = {
    to: expoPushToken,
    sound: 'default', // <== the values are 'default' (sound) or null (silent)
    title: 'Original Title',
    body: 'And here is the body!',
    data: { data: 'goes here' },
  };

我记得还有一个选项可以设置通知的优先级。发挥这些价值，直到获得所需的东西。在此页面中搜索“优先级”：https://docs.expo.io/versions/latest/sdk/notifications/

警报和声音在博览会推送通知中不起作用

1 个答案: