如果我的 GPS 未打开，如何设置条件

Question

如何设置如果我的 GPS 没有打开，我的应用会先打开 GPS 选项，然后在打开我的 GPS 后，它会继续搜索我的位置。请帮助并提前感谢您的答案。

这是我的 .java 文件

static final LatLng HAMBURG = new LatLng(53.558, 9.927);
 static final LatLng KIEL = new LatLng(53.551, 9.993);

GoogleMap googlemap;
@Override
protected void onCreate(Bundle savedInstanceState) {



    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_map);
    int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());
    if(status!=ConnectionResult.SUCCESS){
        int requestCode = 10;
        Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode);
        dialog.show();
    }
    else{
        SupportMapFragment mf = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
        googlemap = mf.getMap();
        googlemap.setMyLocationEnabled(true);
        // Getting LocationManager object from System Service LOCATION_SERVICE
        LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

        // Creating a criteria object to retrieve provider
        Criteria criteria = new Criteria();

        // Getting the name of the best provider
        String provider = locationManager.getBestProvider(criteria, true);

        // Getting Current Location
        Location location = locationManager.getLastKnownLocation(provider);

        if(location!=null){
            onLocationChanged(location);
        }
        locationManager.requestLocationUpdates(provider, 20000, 0, this);

    }
}
@Override
public void onLocationChanged(Location location) {


    // Getting latitude of the current location
    double latitude = location.getLatitude();

    // Getting longitude of the current location
    double longitude = location.getLongitude();

    // Creating a LatLng object for the current location
    LatLng latLng = new LatLng(latitude, longitude);

    // Showing the current location in Google Map
    googlemap.moveCamera(CameraUpdateFactory.newLatLng(latLng));

    // Zoom in the Google Map

    googlemap.animateCamera(CameraUpdateFactory.zoomTo(15));
    googlemap.addMarker(new MarkerOptions()
    .position(new LatLng(latitude, longitude))
    .title("Your Here!"));

       }


@Override
public void onProviderDisabled(String arg0) {
    // TODO Auto-generated method stub

}
@Override
public void onProviderEnabled(String arg0) {
    // TODO Auto-generated method stub

}
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
    // TODO Auto-generated method stub

}









}

Answer 1

我把它推到一个方法如下：

/**
 * Sets up the devices location services to report location and updates the lat and long of the device if available
 */
public void initialiseLocationServices() {
    // Initialise objects
    locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
    boolean gps_enabled = false;
    boolean network_enabled = false;
    boolean hasLocation;

    try {
        gps_enabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
    } catch (Exception ignored) {

    }

    try {
        network_enabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
    } catch (Exception ignored) {

    }

    //  I am only interested in at least one being on.
    // hasLocation = gps_enabled || network_enabled;
    //if(hasLocation) { my way of doing things

    // You want to do it like this:
    if(!gps_enabled) {
        Intent gpsOptionsIntent = new Intent(  
        android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);  
        startActivity(gpsOptionsIntent);
    } else {
        SupportMapFragment mf = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
        googlemap = mf.getMap();
        googlemap.setMyLocationEnabled(true);

        // Creating a criteria object to retrieve provider
        Criteria criteria = new Criteria();

        // Getting the name of the best provider
        String provider = locationManager.getBestProvider(criteria, true);

        // Getting Current Location
        Location location = locationManager.getLastKnownLocation(provider);

        if(location!=null){
            onLocationChanged(location);
        }
        locationManager.requestLocationUpdates(provider, 20000, 0, this);
    }

注意：这只是伪代码，您需要处理 GPS 设置等的更改，我尚未测试此代码。

Answer 2

您可以为此使用位置管理器

private LocationManager locationManager;
public boolean isGPSEnabled;

locationManager = (LocationManager)mContext.getSystemService(LOCATION_SERVICE);
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

if(isGPSEnabled)
{
    if(locationManager != null)
    {
        //TODO
    }
}