Question

我想在Button按下获取Location对象。我知道LocationListener回调，但它们只在特定时间或距离后执行。我想立即获得位置。有没有办法这样做。

Answer 1

public class GPSHelper {

    private Context context;
    // flag for GPS Status
    private boolean isGPSEnabled = false;
    // flag for network status
    private boolean isNetworkEnabled = false;
    private LocationManager locationManager;
    private Location location;
    private double latitude;
    private double longitude;

    public GPSHelper(Context context) {
        this.context = context;

        locationManager = (LocationManager) context
                .getSystemService(Context.LOCATION_SERVICE);

    }   public void getMyLocation() {
        List<String> providers = locationManager.getProviders(true);

        Location l = null;
        for (int i = 0; i < providers.size(); i++) {
            l = locationManager.getLastKnownLocation(providers.get(i));
            if (l != null)
                break;
        }
        if (l != null) {
            latitude = l.getLatitude();
            longitude = l.getLongitude();
        }
    }

    public boolean isGPSenabled() {
        isGPSEnabled = locationManager
                .isProviderEnabled(LocationManager.GPS_PROVIDER);

        // getting network status
        isNetworkEnabled = locationManager
                .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

        return (isGPSEnabled || isNetworkEnabled);
    }

    /**
     * Function to get latitude
     */
    public double getLatitude() {
        return latitude;
    }

    /**
     * Function to get longitude
     */
    public double getLongitude() {
        return longitude;
    }

Answer 2

欢迎您致电getLastKnownLocation()上的LocationManager来检索您所请求的位置提供商的最后一个已知位置。但是：

该位置可能已旧
该位置可能为null

因此，您的代码需要能够应对这两种情况。

Answer 3

使用LocationManager类：

locationManager = (LocationManager)this.getSystemService(LOCATION_SERVICE);
location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
    latitude=location.getLatitude();
    longitude=location.getLongitude();
    Log.d("old","lat :  "+latitude);
    Log.d("old","long :  "+longitude);
    this.onLocationChanged(location);
}

Answer 4

请尝试以下操作： https://github.com/delight-im/Android-SimpleLocation

如果启用了您的位置信息，则只需3行代码：

usersSelected: boolean = false;

myMethod(): void {
    this.usersSelected = false;
}

Answer 5

您可以使用FusedLocationProviderClient获取最新的已知位置

有非常简单的步骤来获取当前的纬度，经度，海拔和方位

在SDK Manager中将Google Play服务更新或安装为最新版本。

在项目清单中添加“位置”权限。

将此行添加到“活动/片段”中：

（i） Kotlin代码

private lateinit var fusedLocationClient: FusedLocationProviderClient

fusedLocationClient = LocationServices.getFusedLocationProviderClient(this)

fusedLocationClient.lastLocation
                .addOnSuccessListener { location: Location? ->
                    Log.d(TAG, "latitude:" + location?.latitude)
                    Log.d(TAG, "longitude:" + location?.longitude)
                    Log.d(TAG, "altitude:" + location?.altitude)
                    Log.d(TAG, "bearing:" + location?.bearing)
                }

（ii）JAVA代码

 private FusedLocationProviderClient fusedLocationClient;
 fusedLocationClient = LocationServices.getFusedLocationProviderClient(this);

fusedLocationClient.getLastLocation()
        .addOnSuccessListener(this, new OnSuccessListener<Location>() {
            @Override
            public void onSuccess(Location location) {
                if (location != null) {
                     Log.d(TAG,location.getLatitude) 
                     Log.d(TAG,location.getLongitude) 
                }
            }
        });

就是这样。运行您的代码，您可以在Logcat中检查您的当前位置。不要忘记从模拟器或Android手机接受位置权限。

使用FusedLocationProviderClient无法获得适当的高度和方位。

快乐编码：）

获取当前lat长的android

5 个答案: