Question

我正在谷歌地图上工作，我需要在我自己的应用程序中的两个位置（我当前的位置和目的地位置）之间的谷歌地图驾驶方向我不想打开任何谷歌地图应用程序。所以请建议我如何做到这一点。到目前为止，我已经完成了整合谷歌地图，缩放到我当前的位置，在目的地拉长的地方放置一个标记。

我的java文件：

public class GoogleMapActivity extends FragmentActivity implements
    OnMapReadyCallback, GoogleMap.OnMarkerClickListener, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {

Location mLastLocation;
GoogleApiClient mGoogleApiClient;
private GoogleMap mMap;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_google_map);

    SupportMapFragment mapFragment =
            (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
    Log.d("Tag", "in onc control in try");
    buildGoogleApiClient();
}

protected void onStart() {
    mGoogleApiClient.connect();
    super.onStart();
}

protected void onStop() {
    mGoogleApiClient.disconnect();
    super.onStop();
}

protected synchronized void buildGoogleApiClient() {
    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
    mGoogleApiClient.connect();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        // TODO: Consider calling
        //    ActivityCompat#requestPermissions
        // here to request the missing permissions, and then overriding
        //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
        //                                          int[] grantResults)
        // to handle the case where the user grants the permission. See the documentation
        // for ActivityCompat#requestPermissions for more details.
        return;
    }
    mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
            mGoogleApiClient);
    if (mLastLocation != null) {
        Log.d("TAG","lat"+mLastLocation.getLatitude());
        Log.d("TAG","lng"+mLastLocation.getLongitude());
        ToastHelper.blueToast(getApplicationContext(), "location is " + mLastLocation.getLatitude() + " " + mLastLocation.getLongitude());
        mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude()), 12.0f));
        LatLng destination = new LatLng(14.880499, 79.988847);
        mMap.addMarker(new MarkerOptions().position(destination).title("Destination"));
    }
    else {
        Log.d("TAG","mLastLocation is null");
    }
}

@Override
public void onConnectionSuspended(int i) {
}

/**
 * Called when the map is ready.
 */
@Override
public void onMapReady(GoogleMap map) {
    mMap = map;
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        // TODO: Consider calling
        //    ActivityCompat#requestPermissions
        // here to request the missing permissions, and then overriding
        //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
        //                                          int[] grantResults)
        // to handle the case where the user grants the permission. See the documentation
        // for ActivityCompat#requestPermissions for more details.
        return;
    }
    mMap.setMyLocationEnabled(true);
}
/**
 * Called when the user clicks a marker.
 */
@Override
public boolean onMarkerClick(final Marker marker) {
    // Retrieve the data from the marker.
    // Return false to indicate that we have not consumed the event and that we wish
    // for the default behavior to occur (which is for the camera to move such that the
    // marker is centered and for the marker's info window to open, if it has one).
    return false;
}

@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

}

}

Answer 1

Google提供了一个用于指导的网络服务公共API。据我所知，它没有与Android API捆绑在一起。

在这里，您可以使用link来开始

Answer 2

查看这个令人敬畏且易于使用的库： https://github.com/jd-alexander/Google-Directions-Android

此库允许您计算两个位置之间的路线并将其显示在地图上。
它为您提供了一个路线点列表，您可以在Google地图中绘制该路线点以显示路线和路线。

Answer 3

我不知道你项目的最终目标。但是，如果您的目的是获得从A点到B点的路线，那么Google Roads Api可以为您提供在地图上绘制路线所需的数据或任何您想要的数据。

它为您提供原始点，甚至是特定路段的速度。它会处理可能导致您通过建筑物绘制方向的冗余数据。

Answer 4

终于得到了结果：使用此API链接： http://maps.googleapis.com/maps/api/directions/json?origin=(origin)&destination=(destination）

它将返回JSON作为包含纬度和经度的响应，并将它们存储在一个数组中，并使用谷歌地图中的那些拉长点来绘制折线

Google Map在我自己的应用程序中的两个位置之间的行车路线

4 个答案: