我正在使用React-Native构建应用程序,并且需要根据要求进行位置访问。
我尝试过使用react-native-fused-location
,如下所示。
FusedLocation.setLocationInterval(20000);
FusedLocation.setFastestLocationInterval(15000);
FusedLocation.setSmallestDisplacement(10);
FusedLocation.setLocationPriority(
FusedLocation.Constants.HIGH_ACCURACY
);
FusedLocation.startLocationUpdates();
FusedLocation.getFusedLocation().then(location => {
if (location != null) {
let initialPosition = JSON.stringify(location);
this.state.latitude = location.latitude;
this.state.longitude = location.longitude;
this.state.timestamp = location.timestamp;
this.state.initialPosition = initialPosition;
} else {
alert("Location unavailable, please try later");
}
}).catch(error => { // fused location catch
console.log("location retrieval failed");
});
对于Oreo 8.0.0,我收到的唯一输出是上面的代码,E / request:100。
也尝试了另一种方式如下
navigator.geolocation.watchPosition(
location => {
console.log("inside watchPosition location");
if (location != null) {
console.log("location is not null");
let initialPosition = JSON.stringify(location.coords);
this.state.latitude = location.coords.latitude;
this.state.longitude = location.coords.longitude;
this.state.timestamp = location.coords.timestamp;
this.state.initialPosition = initialPosition;
} else {
alert("Location unavailable, please try later");
}
},
error => {
console.log("calling ShowHideActivityIndicator, getLocationWithNavigate (ios)");
this.ShowHideActivityIndicator(false);
alert("location retrieval failed");
console.log(error);
},
{ timeout: 20000, enableHighAccuracy: true, distanceFilter: 10 }
);
但是在上述两个代码中获得相同的输出,无法在Android Oreo 8.0.0中获得该位置。即使是检索回调的位置也不会被调用。虽然在其他版本中,包括Oreo 8.1.0和较低版本的设备,包括Marshmallow和Nougat,但似乎工作正常。
但是,如果我在Oreo 8.0.0中打开假GPS,那么它似乎能够获得该位置。我无法弄明白,我错过了什么。
提到谷歌文件:
为了降低功耗,Android 8.0(API级别26)限制了后台应用程序检索用户当前位置的频率。应用每小时只能收到几次位置更新.Background Location Limits