如何在android地图中获取我当前的位置？

实际上我的问题是我没有得到当前位置的纬度和经度我尝试了很多方法。我知道这个问题已经问过所以我也尝试过这些答案仍然没有得到答案。请帮助我。

我想在 Map 中获取我当前的位置并将其设置在 location 变量中

这是我的代码：

- onCreate 方法

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_your_location);
    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);

    infoTextView = (TextView) findViewById(R.id.infoTextView);
    requestKorsaButton = (Button) findViewById(R.id.requestKorsa);

    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    provider = locationManager.getBestProvider(new Criteria(), true);
    if(provider == null) {
        Toast.makeText(this, "No Location for you", Toast.LENGTH_SHORT).show();
    }

    if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(
                this,
                new String[]{android.Manifest.permission.ACCESS_COARSE_LOCATION, android.Manifest.permission.ACCESS_FINE_LOCATION},
                PERMISSION_LOCATION_REQUEST_CODE);
    }
    locationManager.requestLocationUpdates(provider, 400, 1, this);
}

- onMapReady 方法

   @Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;

    if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(
                this,
                new String[]{android.Manifest.permission.ACCESS_COARSE_LOCATION, android.Manifest.permission.ACCESS_FINE_LOCATION},
                PERMISSION_LOCATION_REQUEST_CODE);
    }
    mMap.setMyLocationEnabled(true);

    location = locationManager.getLastKnownLocation(provider);
    if (location != null) {
        updateLocation(location);
    }

}