Question

我正在尝试让应用程序输入纬度和经度，并计算到位置之间的距离，并在标记位置之间绘制折线，但折线未完全绘制到其他目的地。这是我的代码`

strtod

//这里我将Polyline添加到Onclick

public class MainActivity extends AppCompatActivity implements OnMapReadyCallback {
private TextView source;
private TextView destination;
private EditText sLatitude1;
private EditText sLongtiude1;
private EditText dLatitude2;
private EditText dLongtiude2;
private Button button;
private GoogleMap mMap;
boolean mapReady = false;
MarkerOptions place1;
MarkerOptions place2;
Location location;
double lati1;
double longi1;
double lati2;
double longi2;
TextView textView;
 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // find text that display distance
    textView = (TextView) findViewById(R.id.distance);
    MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
    // find edit text and text view
    source = (TextView) findViewById(R.id.sourc);
    destination = (TextView) findViewById(R.id.destination);
    sLatitude1 = (EditText) findViewById(R.id.lat1);
    sLongtiude1 = (EditText) findViewById(R.id.long1);
    dLatitude2 = (EditText) findViewById(R.id.lat2);
    dLongtiude2 = (EditText) findViewById(R.id.long2);
    // find button
    button = (Button) findViewById(R.id.getDistance);

//我不知道为什么不完成

Answer 1

你以错误的方式添加了折线！

 mMap.addPolyline(new PolylineOptions().geodesic(true)
                    .add(new LatLng(lati1, longi1))
                    .add(new LatLng(lati2, lati2)));

在lat2，lat2中添加了一个点！

 mMap.addPolyline(new PolylineOptions().geodesic(true)
                    .add(new LatLng(lati1, longi1))
                    .add(new LatLng(lati2, longi2)));

折线未完成到谷歌地图上的目的地

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