我正在使用cordova后台模式插件在后台执行服务。它工作正常，直到应用程序最小化，但一旦应用程序从任务栏中删除或完全关闭，服务停止不应发生。 即使应用程序已关闭，该服务也应该运行。
帮助将不胜感激。 在此先感谢!!!!
答案 0 :(得分：0)
这是我正在使用的以下代码
cordova.plugins.backgroundMode.enable();
cordova.plugins.backgroundMode.setDefaults({
title: 'Osprey',
ticker: '',
text: 'App is running in background!!!'
});
cordova.plugins.backgroundMode.onactivate = function() {
cordova.plugins.diagnostic.isLocationEnabled(function(enabled) {
if (enabled) {
var marker;
var db = $cordovaSQLite.openDB("my.db"); //mobile
//var db = window.openDatabase("my.db", '1', 'auto', 1024 * 1024 * 100);
//$cordovaSQLite.execute(db,"DROP TABLE IF EXISTS Location;"); //drop a table
$cordovaSQLite.execute(db, "CREATE TABLE IF NOT EXISTS Location (id INTEGER PRIMARY KEY AUTOINCREMENT, latitude DOUBLE, longitude DOUBLE, date NUMERIC)");
var options = {timeout: 20000, enableHighAccuracy: false};
$cordovaGeolocation.getCurrentPosition(options).then(function(position){
var latLng = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
lat = position.coords.latitude;
long = position.coords.longitude;
var mapOptions = {
center: latLng,
zoom: 15,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
$scope.map = new google.maps.Map(document.getElementById("map"), mapOptions);
$http.get('http://maps.googleapis.com/maps/api/geocode/json?latlng='+lat+','+long+'&sensor=true').
then(function(data){
console.log(data);
$scope.address='Your current location is : ' +data.data.results[0].formatted_address;
});
google.maps.event.addListenerOnce($scope.map, 'idle', function(){
marker = new google.maps.Marker({
map: $scope.map,
animation: google.maps.Animation.DROP,
position: latLng,
draggable: true
});
var watchOptions = {maximumAge: 10000, timeout: 3000, enableHighAccuracy: false};
//var watchOptions = {frequency : 1000,timeout : 3000,enableHighAccuracy: false };
var watch = $cordovaGeolocation.watchPosition(watchOptions);
watch.then(
null,
function(err) {
console.log(err.message);
},
function(position) {
//start fetch tracking status
var data = {};
data.companyId = $window.localStorage['companyId'];
data.apiKey = $window.localStorage['apiKey'];
$http({
method: 'POST',
url: "http://192.241.86.4/api/fetch-tracking-status",
crossDomain:true,
data: data
}).success(function (response) {
var j = response.length - 1;
if (response[0].startTime === null || response[j].endTime === null) {
$cordovaToast
.show('No Tracking For Now!!!', 'long', 'center')
.then(function(success) {
console.log('success');
}, function (error) {
console.log('error');
});
} else {
console.log('tracking');
var latitude = position.coords.latitude;
var longitude = position.coords.longitude;
var new_marker_position = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
marker.setPosition(new_marker_position);
var query = "INSERT INTO Location (latitude, longitude, date) VALUES (?,?,Date('now'))";
$cordovaSQLite.execute(db, query, [position.coords.latitude, position.coords.longitude]).then(function(res) {
console.log("INSERT ID -> " + res.insertId);
}, function (err) {
console.log(err.message);
});
}
},function error(response) {
console.log("Error Saving Data");
});
}
);
//watch.clearWatch();
var infoWindow = new google.maps.InfoWindow({
content: $scope.address
});
google.maps.event.addListener(marker, 'click', function () {
infoWindow.open($scope.map, marker);
});
});
if (navigator.connection.type == Connection.NONE){
$ionicPopup.confirm({
title: "Internet Disconnected",
content: "The internet is disconnected on your device. Please Connect Internet"
})
} else {
var location = {};
location.locations = [];
setInterval(function(){
var query = "select * from Location";
location.apiKey = $window.localStorage['apiKey'];
$cordovaSQLite.execute(db, query)
.then(
function(result) {
if (result.rows.length > 0) {
for (var i=0; i < result.rows.length; i++) {
var object = {};
object.deviceId = $window.localStorage['imei'];
object.deviceName = $cordovaDevice.getModel();
object.phone = $window.localStorage['phone'];
object.companyId = $window.localStorage['companyId'];
object.createdDate = new Date().toUTCString();
object.batteryPercentage = $scope.showPercentage;
object.latitude = result.rows.item(i).latitude;
object.longitude = result.rows.item(i).longitude;
object.manual = "0";
location.locations.push(object);
}
$http({
method: 'POST',
url: "http://192.241.86.4/api/save-logs",
crossDomain:true,
data: location
}).success(function (response) {
$cordovaToast
.show('Successfully Saved Location', 'long', 'center')
.then(function(success) {
console.log('success');
var deleteQuery = "DELETE FROM Location";
$cordovaSQLite.execute(db, deleteQuery).then(function(res) {
console.log('deleted');
}, function (err) {
console.log(err.message);
});
}, function (error) {
console.log('error');
});
},function error(response) {
console.log("Error Saving Data");
});
} else {
console.log('No places tracked');
}
},
function(error) {
console.log(error.message);
}
);
},20000);
}
}, function(error){
console.log("Could not get location");
});
} else {
alert("Location is disabled");
window.location.reload();
}
}, function(error) {
console.log("The following error occurred: " + error);
});
}