Cannot read the property 'type' of undefined error in cordova network plugin

问题:

I am developing android application using cordova and ionic framework,using network plugin from here (https://github.com/apache/cordova-plugin-network-information). But the device ready alert fires off and then I get the the following error.

"TypeError: Cannot read property 'type' of undefined 

Here is navigator object

navigator.connection.type  

I will get error in following line.

回答1:

use mine

document.addEventListener("deviceready", onDeviceReady, false); // Cordova is ready function onDeviceReady() {     checkConnection() }  function checkConnection() {     networkState = navigator.connection.type;     var states = {};     states[Connection.UNKNOWN] = 'Unknown connection';     states[Connection.ETHERNET] = 'Ethernet connection';     states[Connection.WIFI] = 'WiFi connection';     states[Connection.CELL_2G] = 'Cell 2G connection';     states[Connection.CELL_3G] = 'Cell 3G connection';     states[Connection.CELL_4G] = 'Cell 4G connection';     states[Connection.CELL] = 'Cell generic connection';     states[Connection.NONE] = 'No network connection';     alert('Connection type: ' + states[networkState]); } 

回答2:

For some reason, the navigator.connection object is not ready at the same time as cordova is.

You have to use a timeout, such as this one - designed for Angular/Ionic

   setTimeout(function(){         var connection = connectionService.getConnection();         console.log("connection : "+connection);         $scope.connection = connection;         $scope.$apply()     }, 5000) 

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