Android：如何在新的谷歌地图服务中绘制位置变化的驾驶路径答案

【问题标题】：Android : How to draw driving path with location changing in new google map servicesAndroid：如何在新的谷歌地图服务中绘制位置变化的驾驶路径
【发布时间】：2019-07-17 12:04:30
【问题描述】：

我使用谷歌安卓地图来标记当前位置和另一个位置。我还想标记这些方向之间的驱动路径。但我只能在这两个位置之间画一条线。

这是我的步骤，

这是我的布局文件。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/content_roster_clock_out_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginBottom="5dp"
    android:layout_marginTop="3dp"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".RosterClockOutActivity"
    tools:showIn="@layout/app_bar_roster_clock_out">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5dp"
            android:layout_marginRight="5dp"
            android:orientation="vertical">

            <com.google.android.gms.maps.MapView
                android:id="@+id/roster_clock_out_map_view"
                android:layout_width="match_parent"
                android:layout_height="300dp"
                android:clickable="true"
                android:apiKey="my api key"
                android:layout_weight="1"/>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/roster_clock_out_map_view"
                android:layout_marginTop="4dp"
                android:layout_marginBottom="15dp"
                android:alpha="0.5"
                android:background="#765491"
                android:orientation="vertical">

                <TextView
                    android:id="@+id/roster_clock_out_date_text"
                    android:layout_width="match_parent"
                    android:layout_height="40dp"
                    android:layout_gravity="center"
                    android:paddingTop="7dp"
                    android:background="#563e6b"
                    android:paddingBottom="7dp"
                    android:text="5 th MAY 2017"
                    android:textAlignment="center"
                    android:textStyle="bold"
                    android:textColor="@android:color/white"
                    android:textSize="24sp" />

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="10dp"
                    android:orientation="horizontal">

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_weight="1"
                        android:text="START TIME"
                        android:textStyle="bold"
                        android:textAlignment="center"
                        android:textColor="@android:color/white"
                        android:textSize="14sp" />

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_weight="1"
                        android:text="END TIME"
                        android:textStyle="bold"
                        android:textAlignment="center"
                        android:textColor="@android:color/white"
                        android:textSize="14sp" />

                </LinearLayout>


                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal">

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:id="@+id/roster_clock_out_st_time_text"
                        android:layout_weight="1"
                        android:text="08.30 AM"
                        android:textStyle="bold"
                        android:textAlignment="center"
                        android:textColor="@android:color/white"
                        android:textSize="20sp" />

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:id="@+id/roster_clock_out_ed_time_text"
                        android:layout_weight="1"
                        android:text="05.30 PM"
                        android:textStyle="bold"
                        android:textAlignment="center"
                        android:textColor="@android:color/white"
                        android:textSize="20sp" />

                </LinearLayout>

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:id="@+id/roster_clock_out_location_text"
                    android:layout_marginRight="35dp"
                    android:layout_marginLeft="35dp"
                    android:layout_marginTop="8dp"
                    android:drawablePadding="5dp"
                    android:drawableLeft="@drawable/ic_place_small"
                    android:textAlignment="center"
                    android:maxLines="3"
                    android:lines="3"
                    android:clickable="true"
                    android:textSize="14sp"
                    android:text="Australian Strategic Partnership\n#9, School Lane, Kollpity, Colombo 3"
                    android:textColor="@android:color/white" />

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="18dp"
                    android:orientation="horizontal">

                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginLeft="10dp"
                        android:layout_weight="1"
                        android:orientation="vertical">

                        <LinearLayout
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:orientation="horizontal">

                            <TextView
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:layout_weight="1"
                                android:textSize="14sp"
                                android:text="CLOCK IN"
                                android:textStyle="bold"
                                android:textAlignment="center"
                                android:textColor="#f7f316"/>

                            <TextView
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:layout_weight="1"/>

                        </LinearLayout>

                        <LinearLayout
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:orientation="horizontal">

                            <TextView
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:id="@+id/roster_clock_in_sign_time_text"
                                android:layout_weight="1"
                                android:textSize="18sp"
                                android:textStyle="bold"
                                android:textColor="#f7f316"
                                android:text="08:43 PM"
                                android:textAlignment="center"/>

                            <TextView
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:id="@+id/roster_clock_in_delayed_time_text"
                                android:layout_weight="1"
                                android:textSize="18sp"
                                android:textColor="@android:color/white"
                                android:text="04:00"
                                android:textStyle="bold"
                                android:textAlignment="center"/>

                        </LinearLayout>

                    </LinearLayout>

                    <android.support.v7.widget.AppCompatButton
                        android:id="@+id/roster_clock_out_save_btn"
                        style="@style/ButtonStyle"
                        android:layout_height="32dp"
                        android:background="#800080"
                        android:alpha="5"
                        android:layout_marginBottom="10dp"
                        android:layout_marginRight="10dp"
                        android:textSize="16sp"
                        android:textStyle="bold"
                        android:clickable="true"
                        android:layout_weight="1.5"
                        android:text="CLOCK OUT" />

                </LinearLayout>

            </LinearLayout>

        </LinearLayout>

    </ScrollView>

</RelativeLayout>

这一步是在一个活动中实现谷歌地图，

public class RosterActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {

    private Context context;    
    MapView locationMap;
    View mainView;

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

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar_roster);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayShowHomeEnabled(true);

        mainView = this.getWindow().getDecorView().findViewById(R.id.content_roster_clock_in_layout);
        context = this;                    

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout_roster);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.setDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view_roster);
        Menu menu = navigationView.getMenu();
        if (menu != null) {
            for (int i = 0; i < menu.size(); i++) {
                MenuItem menuItem = menu.getItem(i);

            }
        }
        navigationView.setNavigationItemSelectedListener(this);

        locationMap = (MapView) findViewById(R.id.roster_map_view);
        locationMap.onCreate(savedInstanceState);        

        InternetConnectivity internetConnectivity = new InternetConnectivity();
        final boolean isConnectedToInternet = internetConnectivity.isConnectedToInternet(context);

        final LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        final Criteria criteria = new Criteria();

        final Location location = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, false));

        if (isConnectedToInternet == true) {

            final LatLng assignedLocation = new LatLng(6.931253, 79.906292);

            locationMap.getMapAsync(new OnMapReadyCallback() {
                @Override
                public void onMapReady(final GoogleMap googleMap) {
                    if (ActivityCompat.checkSelfPermission(RosterActivity.this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(RosterActivity.this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                        googleMap.setMyLocationEnabled(true);
                    }
                    googleMap.setMyLocationEnabled(true);
                    googleMap.getUiSettings().setAllGesturesEnabled(true);
                    googleMap.getUiSettings().setZoomControlsEnabled(true);
                    googleMap.getUiSettings().setScrollGesturesEnabled(true);
                    googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
                    if (location != null)                    {
                        googleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(), location.getLongitude()), 13));

                        CameraPosition cameraPosition = new CameraPosition.Builder()
                                .target(new LatLng(location.getLatitude(), location.getLongitude()))
                                .zoom(10)
                                .bearing(0)
                                .tilt(40)
                                .build();
                        googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
                    }
                    googleMap.addMarker(new MarkerOptions().position(assignedLocation).title("Your Location").draggable(true));

                }
            });

            setData(responseBody);
        }else{
            Snackbar.make(mainView, "No Internet Connection", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }      
    }

    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        return true;
    }



    @Override
    protected void onStart() {
        super.onStart();
        locationMap.onStart();
    }

    @Override
    protected void onResume() {
        super.onResume();
        locationMap.onResume();
    }

    @Override
    protected void onPause(){
        super.onPause();
        locationMap.onPause();
    }

    @Override
    protected void onStop(){
        super.onStop();
        locationMap.onStop();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        locationMap.onDestroy();
    }

    @Override
    public void onLowMemory(){
        super.onLowMemory();
        locationMap.onLowMemory();
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        locationMap.onSaveInstanceState(outState);
    }

}

如何使用我的地图视图和谷歌地图？

有什么想法吗？

【问题讨论】：

标签： java android google-maps android-mapview on-location-changed

【解决方案1】：

您可以在 google map android api v2 中使用 google direvtions。

这将返回 JSONArray 格式的路由。

解析数组并存储在List中

使用折线显示存储在List中的路线。

【讨论】：

【解决方案2】：

请从此 api 获取数据，使用以下参数：origin (lat,long of source), destination(lat, long of destination), key(google api key) http://maps.googleapis.com/maps/api/directions/json

从上面的 api 获取的数据是从 A 到 B 的位置列表。您所要做的就是从数据中绘制一个点列表。你会得到一条从a到b的方向线

    final JSONObject json = new JSONObject(result);
    JSONArray routeArray = json.getJSONArray("routes");
    JSONObject routes = routeArray.getJSONObject(0);
    JSONObject overviewPolylines = routes
            .getJSONObject("overview_polyline");
    String encodedString = overviewPolylines.getString("points");

    JSONArray legArray =routes.getJSONArray("legs");
    JSONObject legs= legArray.getJSONObject(0);
    JSONObject distance =legs.getJSONObject("distance");
    String dis=distance.getString("text");
    RouteActivity.txtDistance.setText("("+dis+")");

    JSONObject duration =legs.getJSONObject("duration");
    String dur=duration.getString("text");
    RouteActivity.txtTime.setText(dur);

    List<LatLng> list = decodePoly(encodedString);

    PolylineOptions options = new PolylineOptions().width(5).color(Color.BLUE).geodesic(true);
    for (int z = 0; z < list.size(); z++) {
        LatLng point = list.get(z);
        options.add(point);
    }
    mGoogleMap.addPolyline(options);

private static List<LatLng> decodePoly(String encoded) {

List<LatLng> poly = new ArrayList<LatLng>();
int index = 0, len = encoded.length();
int lat = 0, lng = 0;

while (index < len) {
    int b, shift = 0, result = 0;
    do {
        b = encoded.charAt(index++) - 63;
        result |= (b & 0x1f) << shift;
        shift += 5;
    } while (b >= 0x20);
    int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
    lat += dlat;

    shift = 0;
    result = 0;
    do {
        b = encoded.charAt(index++) - 63;
        result |= (b & 0x1f) << shift;
        shift += 5;
    } while (b >= 0x20);
    int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
    lng += dlng;

    LatLng p = new LatLng((((double) lat / 1E5)),
            (((double) lng / 1E5)));
    poly.add(p);
}

return poly;
}

【讨论】：