Develop Reference

Adding Back Tracks Does Not Work on WebRTC

We create an app with React Native WebRTC and Janus Gateway. It works as wanted. Our app is based on push to talk. So when an users in listen mode need to break microphone for other apps. And take back when anyone press to speak button.
Breaking Mic:
if (!globalTrack) {
globalTracks = config.myStream.getTracks();
}
config.myStream.getTracks().forEach(t => {
config.myStream.removeTrack(t);
});
Get Back the Tracks:
globalTracks.forEach(t => {
config.myStream.addTrack(t);
});
pluginHandle.createOffer({
media: { addVideo: true },
success: function(jsep) {
Janus.debug(jsep);
pluginHandle.send({message: {audio: true, video: false}, "jsep": jsep });
},
error: function(error) {
console.log("WebRTC error... " + JSON.stringify(error));
}
});
// also I have try this:
devices = await mediaDevices.getUserMedia({audio: true, video: false})
// devices output https://pastebin.ubuntu.com/p/KQqBq2QRy3/
devices._tracks.forEach(t => {
config.myStream.addTrack(t);
});
pluginHandle.createOffer({
media: {audio: {deviceId: devices._tracks[0]['id']}, replaceAudio: true},
success: function(jsep) {
pluginHandle.send({message: {audio: true, video: false}, "jsep": jsep});
},
error: function(error) {
console.log(("WebRTC error... " + JSON.stringify(error));
}
});
Problem:
Problem: E.g: when a call came to the phone and answered it. The user's voice does not pass anymore even after restarting the app.
On Janus Gateway every things is normal. I think problem is about renegotiation.
Problem occurred only on Android phones. And works after force stopping the app.
Janus Gateway Log which when I speak at room:
There's a message for JANUS AudioBridge plugin
Setting muted property: true (room 20, user 2301490876606211)
Notifying participant 329012611897879 (kardan)
Sending event to transport...
>> 0 (Success)

We can not find a generic solution.
For now restarting app is works with react-native-restart

Ionic 2 / Ionic 3 : How to get current location of a device

None of the answers on stackoverflow worked for me. A lot of them are for Ionic 1 or those answers are deprecated or they are not working for android device.
I have seen a lot of solutions on stackoverflow about getting current location of device but non of them seems to be working for Android .
what i have tried:-
using geolocation.getCurrentPosition() , which is working for IOS and browser but not for Android.
using this.geolocation.watchPosition() , which is working for IOS and browser but not for Android.
using navigator.geolocation.getCurrentPosition(),which is working for IOS and browser but not for Android.
using fiddle solution provided by this question getCurrentPosition() and watchPosition() are deprecated on insecure origins
Anyway , all of these are deprecated by google due to :-
getCurrentPosition() and watchPosition() are deprecated on insecure
origins, and support will be removed in the future. You should
consider switching your application to a secure origin, such as HTTPS.
See goo.gl/rStTGz for more details.
what worked for me is (https://ionicframework.com/docs/native/background-geolocation/ ) & (https://www.joshmorony.com/adding-background-geolocation-to-an-ionic-2-application/ ) both of these are based on background-geolocation plugin but,it's taking almost 50-55 sec on Android device, again it's working fine for ios
The problem with joshmorony(https://www.joshmorony.com/adding-background-geolocation-to-an-ionic-2-application/ ) solution is foreground is not working for Android physical devices but working fine for browser and ios. Background tracking is working fine , which is taking almost 50 sec to give lat & lng for the first time.
Please help me with this. I want a way to get current location in minimum time. For your info, I am using google javascript map sdk / api .

I tried every solution provided by all of you and others also on internet. Finally i found a solution.You can try this plugin cordova-plugin-advanced-geolocation (https://github.com/Esri/cordova-plugin-advanced-geolocation ) from ESRI . But this plugin will work for Android not IOS. For ios you can go with same old approach . i.e - using this.geolocation.getCurrentPosition(...) or this.geolocation.watchPosition(..).
Add cordova-plugin-advanced-geolocation Plugin Like this :-
cordova plugin add https://github.com/esri/cordova-plugin-advanced-geolocation.git
then Add below line at the top of Class / Component
declare var AdvancedGeolocation:any; //at the top of class
Now add these lines inside relevant function of component ( P.S. - I have included code for both Android & IOS)
//**For Android**
if (this.platform.is('android')) {
this.platform.ready().then(() => {
AdvancedGeolocation.start((success) => {
//loading.dismiss();
// this.refreshCurrentUserLocation();
try {
var jsonObject = JSON.parse(success);
console.log("Provider " + JSON.stringify(jsonObject));
switch (jsonObject.provider) {
case "gps":
console.log("setting gps ====<<>>" + jsonObject.latitude);
this.currentLat = jsonObject.latitude;
this.currentLng = jsonObject.longitude;
break;
case "network":
console.log("setting network ====<<>>" + jsonObject.latitude);
this.currentLat = jsonObject.latitude;
this.currentLng = jsonObject.longitude;
break;
case "satellite":
//TODO
break;
case "cell_info":
//TODO
break;
case "cell_location":
//TODO
break;
case "signal_strength":
//TODO
break;
}
}
catch (exc) {
console.log("Invalid JSON: " + exc);
}
},
function (error) {
console.log("ERROR! " + JSON.stringify(error));
},
{
"minTime": 500, // Min time interval between updates (ms)
"minDistance": 1, // Min distance between updates (meters)
"noWarn": true, // Native location provider warnings
"providers": "all", // Return GPS, NETWORK and CELL locations
"useCache": true, // Return GPS and NETWORK cached locations
"satelliteData": false, // Return of GPS satellite info
"buffer": false, // Buffer location data
"bufferSize": 0, // Max elements in buffer
"signalStrength": false // Return cell signal strength data
});
});
} else {
// **For IOS**
let options = {
frequency: 1000,
enableHighAccuracy: false
};
this.watch = this.geolocation.watchPosition(options).filter((p: any) => p.code === undefined).subscribe((position: Geoposition) => {
// loading.dismiss();
console.log("current location at login" + JSON.stringify(position));
// Run update inside of Angular's zone
this.zone.run(() => {
this.currentLat = position.coords.latitude;
this.currentLng = position.coords.longitude;
});
});
}
EDIT : First installation is always going fine. But Sometimes you might get errors for no reason in subsequent installations. To make this error (any error with this plugin ) go away.Follow these steps :
1. Remove this plugin from your project (including config.xml and package.json).
2. Delete/Remove android platform.
3. Delete plugins folder.
4. Now reinstall this plugin again, following the steps above.

I have gone through the problem and find the solution.
the best way to get geolocation of the user is to use this plugin https://ionicframework.com/docs/native/geolocation/
do not forget to add this is app.moudle.ts as its a provider.
by simply adding this code in app component i was able to get location( do not forget to import and add in constructor)
this.geolocation.getCurrentPosition({ enableHighAccuracy: true }).then((resp) => {
console.log(resp);
}, Error => {
console.log(Error);
}).catch(Error => {
console.log(Error);
})
i only have the same error while i was using ionic cordova run
android --livereload that is insecure origin
but when i use ionic serve i can see the response in browser and also after
using ionic cordova run android
just to confirm response in android i check the chrome debugger.

It works for me
import { Geolocation } from '#ionic-native/geolocation/ngx';
import { NativeGeocoder, NativeGeocoderOptions, NativeGeocoderResult } from '#ionic-native/native-geocoder/ngx';
geoencoderOptions: NativeGeocoderOptions = {
useLocale: true,
maxResults: 5
};
constructor(
private geolocation: Geolocation,
private nativeGeocoder: NativeGeocoder
) {
getCurrentLocation() {
this.geolocation.getCurrentPosition()
.then((resp) => {
this.getGeoencoder(resp.coords.latitude, resp.coords.longitude);
}).catch((error) => {
console.log('Error getting location', error);
});
}
//geocoder method to fetch address from coordinates passed as arguments
getGeoencoder(latitude, longitude) {
this.nativeGeocoder.reverseGeocode(latitude, longitude, this.geoencoderOptions)
.then((result: NativeGeocoderResult[]) => {
const address = this.generateAddress(result[0]);
})
.catch((error: any) => {
// alert('Error getting location' + JSON.stringify(error));
});
}
//Return Comma saperated address
generateAddress(addressObj) {
let obj = [];
let address = "";
for (let key in addressObj) {
obj.push(addressObj[key]);
}
obj.reverse();
for (let val in obj) {
if (obj[val].length)
address += obj[val] + ', ';
}
return address.slice(0, -2);
}

you need to provide the permission for Android app as follows:
<feature name="Geolocation">
<param name="android-package" value="org.apache.cordova.GeoBroker" />
</feature>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />

I ran into a similar problem. When I build from the terminal with the --prod flag, I no longer see this error since it is now requesting position over https.
Built without --prod flag
Built using the --prod flag
Edit: Sorry for the format, I hope that this makes a little more sense. I used the following function in a service that I could call from anywhere to get the latitude, longitude, accuracy, and timestamp. The key though is using the --prod flag in the terminal when building the app.
this.geolocation.getCurrentPosition().then(position => {
let locationObj = {
lat: position.coords.latitude,
lon: position.coords.longitude,
timestamp: position.timestamp,
accuracy: position.coords.accuracy
};
resolve(locationObj);
})

this method is working for bot android and browser
watchLocation() {
this.watchLocationUpdates = this.geolocation.watchPosition({ maximumAge: 60000, timeout: 25000, enableHighAccuracy: true })
.subscribe(resp => {
this.latitude = resp.coords.latitude;
this.longitude = resp.coords.longitude;
this.altitude = resp.coords.altitude;
this.accuracy = resp.coords.accuracy;
this.altAccuracy = resp.coords.altitudeAccuracy;
this.heading = resp.coords.heading;
this.speed = resp.coords.speed;
this.timestamp = new Date(resp.timestamp);
});
}

I found solution for me: use google api https://www.googleapis.com/geolocation/v1/geolocate?key={API_KEY}
If platform Android I use google api.

Ionic + Cordova + Facebook login: 51 F02 FacebookConnectPlugin sClass not found

I am trying to add facebook login to my application. I followed the same process as mentioned in this blog of ionic "https://ionicthemes.com/tutorials/about/native-facebook-login-with-ionic-framework"
But somehow its not working.
Its failing at $cordovaFacebook.login. Its not going inside.
$scope.fbLogin = function(){
$cordovaFacebook.login(["public_profile", "email", "user_friends"]) //Failing in this step
.then(function(success) {
$cordovaFacebook.api("me?fields=id,name,picture", [])
.then(function(result){
var userData = {
id: result.id,
name: result.name,
pic: result.picture.data.url
}
//Do what you wish to do with user data. Here we are just displaying it in the view
$scope.fbData = JSON.stringify(userData, null, 4);
}, function(error){
// Error message
console.log(error);
})
}, function (error) {
console.log(error); // error comes as "Class not found"
});
}
What i am missing here. After debugging i found it says
51 F02 FacebookConnectPlugin sClass not found
See attached image. What is wrong here.

Damm...Issue is with cordova 5.4.1. I degraded to version 5.3.3 and it started working.

Cannot open files with FileOpener2, but not getting an error in Android

I am attempting to open a PDF file with FileOpener2 (through ng-cordova) with the following code:
$cordovaFile.checkFile(cordova.file.dataDirectory, attachmentPath)
.then((fileEntry) => {
// success
fileEntry.getMetadata((metadata) => {
// metadata.size is in bytes
var megabyteSize = metadata.size / 1048576;
if (megabyteSize > 5) {
var path = cordova.file.dataDirectory + attachmentPath;
console.log(path); // prints: file:///data/data/com.ionicframework.enhatch146189/files/attachments/CS-353ES_CS-420ES_Eng.pdf which is correct
$cordovaFileOpener2.open(path, 'application/pdf').then(() => {
console.log("Opened!") // prints
}, (error) => {
console.log(error);
usePDFJs(); // tries to render PDF in app with PDFJs
});
} else {
usePDFJs();
}
})
}, function (error) {
// error
console.error(error);
});
What happens confuses me: it prompts me with an "open this file in Adobe Reader?" and lists the other PDF viewers, and the console prints "Opened!"
However, no matter what I open ANY pdf in, I get some sort of error such as "cannot open this PDF file".
Can anyone see something wrong with this code?

Apparently, if you use cordova.file.dataDirectory on android you can't open those files in other applications or attach them to emails. Silly mistake -- coded too fast and read too little on the documentation. Using cordova.file.externalApplicationStorageDirectory solved the issue.

Cannot read property 'getPicture' of undefined - ionic camera

this code returns:
Cannot read property 'getPicture' of undefined
Have no idea what im doing wrong, can you please help me with the code?
My App:
angular.module('Todo', ['ionic', 'Todo.controllers','ngStorage',
'Todo.services', 'ngCordova'])
my Controller:
.controller('profileEditCtrl', function($scope,Camera, $localStorage,
$cordovaCamera)
{
$scope.$storage = $localStorage.$default({ data:[]});
$scope.takePicture = function()
{
navigator.camera.getPicture(onSuccess, onFail, { quality: 50,
destinationType: Camera.DestinationType.DATA_URL });
function onSuccess(imageData) {
var image = document.getElementById('myImage');
image.src ="data:image/jpeg;base64," + imageData;
}
function onFail(message) {
alert('Failed because: ' + message);
}
}});

Your code is correct, just add an html button with ng-click="takePicture()".
There is no problem here, It's sure that the browser "cannot read
property 'getPicture' of undefined" because it has no configuration
for a mobile camera that you defined, which means you should test your application on
a real device using:
> ionic run android.
Notice that the new update of Google Chrome has a new feature which
helps your test your device on the browser if it is connected to the
PC/laptop, for testing go to chrome's navigation panel >> More tools >> Inspect devices
or just go to this link:
chrome://inspect/#devices
I'm sure your camera will function normally if you have the plugin cordova plugin add org.apache.cordova.camera installed in the app,
I hope this helps you.

After trying various solutions with no luck for my cordova project, I simply went ahead to use the built-in JavaScript APIs. Essentially:
async function startCapturing() { // get ready to shoot
await getPermission('android.permission.CAMERA');
let stream = await navigator.mediaDevices.getUserMedia({ video: {width: 480, height: 320, facingMode:'environment' }, audio: false });
let video = document.getElementById("pVideo"); // a <video> element
video.srcObject = stream;
video.play();
video.style.display = "block";
}
function shootPhoto(){ // take a snapshot
let video = document.getElementById("pVideo");
let canvas = document.getElementById("pCanvas"); // a <canvas> element
let context = canvas.getContext('2d');
context.drawImage(video,0,0,480,320);
document.getElementById('fsPhotoI').src = Photo.current.src = canvas.toDataURL('image/png');
Photo.current.changed = Profile.current.changed = true;
video.style.display = "none";
}
In particular, some plugins did not work for me because they could't use the Android rear camera right away. The following in getUserMedia(...) does the trick:
facingMode:'environment'
Also make sure you have the CAMERA permission in your AndroidManifest.xml.