使用 NativeScript 開發(fā)實(shí)時(shí)應(yīng)用程序：實(shí)現(xiàn)推送通知

tns create fitApp --appid "com.yourname.fitApp" 

tns plugin add nativescript-geolocation tns plugin add nativescript-google-maps-sdk tns plugin add nativescript-sqlite tns plugin add nativescript-plugin-firebase 

npm install --save fecha 

{     "using_ios": false,     "using_android": true,     "remote_config": false,     "messaging": true,     "crash_reporting": false,     "storage": false,     "facebook_auth": true,     "google_auth": false,     "admob": false,     "invites": false } 

<application ...><service android:name="org.nativescript.plugins.firebase.MyFirebaseInstanceIDService"><intent-filter><action android:name="com.google.firebase.INSTANCE_ID_EVENT"></action></intent-filter></service><service android:name="org.nativescript.plugins.firebase.MyFirebaseMessagingService"><intent-filter><action android:name="com.google.firebase.MESSAGING_EVENT"></action></intent-filter></service></application>

tns platform remove android tns run android 

npm install -g firebase-tools 

npm install firebase-functions@latest --save 

firebase init functions 

const functions = require('firebase-functions');  // // Create and Deploy Your First Cloud Functions // // https://firebase.google.com/docs/functions/write-firebase-functions // // exports.helloWorld = functions.https.onRequest((request, response) => { //  response.send("Hello from Firebase!"); // }); 

exports.helloWorld = functions.https.onRequest((request, response) => {     response.send("Hello from Firebase!"); }); 

firebase deploy --only functions 

const functions = require('firebase-functions'); // for listening to http triggers const admin = require('firebase-admin'); // for accessing the realtime database admin.initializeApp(functions.config().firebase); // initialize the Firebase Admin SDK 

exports.init_push = functions.https.onRequest((request, response) => {          if(request.method == 'POST'){          var id = request.body.id; // ID of the user who made the request (Firebase Auth ID)         var steps = parseInt(request.body.steps); // latest steps, not recorded yet         var friend_ids = request.body.friend_ids.split(',');           friend_ids.push(id); // also include the ID of the current user          // next: add code for getting the user and friends data     }  }); 

admin.database().ref('/users')     .orderByChild('id')     .limitToFirst(1)     .equalTo(id)     .once('value').then(snapshot => {          var user_data = snapshot.val();      if(user_data){         // get all users from the database         admin.database().ref('/users')             .once('value').then(snapshot => {             // next: add code for getting the current user's data and their friends data         });     } }); 

var friends_data = []; var current_user_data = null; var notification_data = {}; var has_notification = false;  var users = snapshot.val(); for(var key in users){     var user_id = users[key].id;          if(friend_ids.indexOf(user_id) != -1 && id != user_id){ // the current user's friends         friends_data.push(users[key]);     }else if(id == user_id){ // the current user         current_user_data = users[key];     } }  // sort in descending order by the number of steps var sorted_friends_data = friends_data.sort(function(a, b) {     return b.steps - a.steps; });   // next: add code for constructing the notification payload 

if(steps > sorted_friends_data[0].steps){     // notify friend who was overtaken     var diff_steps = steps - sorted_friends_data[0].steps;     notification_data = {         payload: {             title: 'One of your friends beat your record',             body: 'Too bad, your friend ' + current_user_data.user_name + ' just overtook you by ' + diff_steps + ' steps'         },         device_token: sorted_friends_data[0].device_token     };     has_notification = true;      }else if(steps > current_user_data.steps){     // notify current user     var diff_steps = steps - current_user_data.steps;     notification_data = {         payload: {             title: 'You beat your record!',             body: 'Congrats! You beat your current record by ' + diff_steps + ' steps!'          },         device_token: current_user_data.device_token     };     has_notification = true; }  // next: add code for sending push notification 

if(has_notification){          var payload = {       notification: notification_data.payload     };          // send push notification     admin.messaging().sendToDevice(notification_data.device_token, payload).then(function(res) {                  response.send(JSON.stringify({'has_notification': true})); // inform the app that a notification was sent     })     .catch(function(error) {         response.send(JSON.stringify(error)); // send the push notification error to the app     });  }else{     response.send(JSON.stringify({'has_notification': false})); // inform the app that a notification was not sent } 

onPushTokenReceivedCallback: function(token) {     // temporarily save it to application settings until such time that      // the user logs in for the first time     applicationSettings.setString('device_token', token); }, 

onMessageReceivedCallback: function(message) {     dialogs.alert({         title: message.title,         message: message.body,         okButtonText: "ok"     }); }, 

if(firebase_result.value == null){       var device_token = applicationSettings.getString('device_token');      var user_data = {         'uid': fb_result.uid,         'user_name': fb_result.name,         'profile_photo': fb_result.profileImageURL,         'device_token': device_token      };  } 

// extracting the friend IDs from the Facebook result var friends_ids = r.data.map(function(obj){     return obj.id; });  // save the friend IDs applicationSettings.setString('friends_ids', JSON.stringify(friends_ids));  friends_ids.push(user[user_key].id); 

// construct the user data for updating the user's distance and steps var user_key = applicationSettings.getString('user_key'); var user = applicationSettings.getString('user'); var user_data = JSON.parse(user); user_data[user_key].distance = total_distance; user_data[user_key].steps = total_steps;  // get friend IDs var friends_ids = JSON.parse(applicationSettings.getString('friends_ids'));  var request_data = {     'id': user_data[user_key].id,     'friend_ids': friends_ids.join(','),     'steps': total_steps }; 

http.request({      url: "https://us-central1-pushapp-ab621.cloudfunctions.net/init_push",      method: "POST",     headers: { "Content-Type": "application/json" },     content: JSON.stringify(request_data)  }).then(function (response) {         var statusCode = response.statusCode;     if(statusCode == 200){         // update the user's data on Firebase         firebase.update(             '/users',             user_data         );       }  }, function (e) {     console.log('Error occurred while initiating push: ', e); }); 

onPushTokenReceivedCallback: function(token) {     applicationSettings.setString('device_token', token);     console.log('device token: ', device_token); //  <p>當(dāng)設(shè)備令牌在 NativeScript 控制臺(tái)中輸出時(shí)，將其復(fù)制，點(diǎn)擊 Firebase 應(yīng)用信息中心上的<strong>數(shù)據(jù)庫</strong>菜單，并將其作為設(shè)備令牌添加給應(yīng)用的所有用戶。使用 device_token 作為屬性名稱。</p> <p>要觸發(fā)推送通知，您可以使用 curl 向 Firebase 函數(shù)端點(diǎn)發(fā)出 POST 請求：</p> <pre class="brush:plaintext;toolbal:false;">curl -X POST -H "Content-Type:application/json" YOUR_FIREBASE_FUNCTION_ENDPOINT -d '{"id":"ID OF A FIREBASE USER", "steps":NUMBER_OF_STEPS, "friend_ids":"COMMA,SEPARATED,FIREBASE,USER_IDs"}' 

{"id":"ID OF A FIREBASE USER", "steps":NUMBER_OF_STEPS, "friend_ids":"COMMA,SEPARATED,FIREBASE,USER_IDs"}