我希望能够使用适用于
Android的Google Maps API在两个用户定义的地理点之间显示路线.我还希望能够让用户选择要显示的路线类型,无论是步行,骑车,汽车等.此外,我希望能够计算使用此路线所需的时间和距离.我试过在网上搜索并查看其他stackoverflow问题,但无济于事.我怎么会这样呢？我怎么能编码这个.
// – – 编辑 – – //
我还想得到交通信息,如繁忙的路线,拥堵等.
解决方法
使用Wrapper库的Android Google Maps Routing示例代码
使用Android Studio Gradle条目：
compile 'com.github.jd-alexander:library:1.1.0'
MainActivity.java
import android.Manifest;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import com.directions.route.Route;
import com.directions.route.RouteException;
import com.directions.route.Routing;
import com.directions.route.RoutingListener;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.LatLngBounds;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.maps.model.Polyline;
import com.google.android.gms.maps.model.PolylineOptions;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class MainActivity extends FragmentActivity implements OnMapReadyCallback,LocationListener,GoogleMap.OnMarkerClickListener,RoutingListener {
private GoogleMap mMap = null;
private LocationManager locationManager = null;
private FloatingActionButton fab = null;
private TextView txtDistance,txtTime;
//Global UI Map markers
private Marker currentMarker = null;
private Marker destMarker = null;
private LatLng currentLatLng = null;
private Polyline line = null;
//Global flags
private boolean firstRefresh = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_map);
Constants.POINT_DEST = new LatLng(18.758663,73.382025); //Lonavala destination.
//Load the map fragment on UI
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
txtDistance = (TextView)findViewById(R.id.txt_distance);
txtTime = (TextView)findViewById(R.id.txt_time);
fab = (FloatingActionButton)findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
MainActivity.this.getRoutingPath();
Snackbar.make(v,"Fetching Route",Snackbar.LENGTH_SHORT).show();
}
});
}
@Override
protected void onResume() {
super.onResume();
firstRefresh = true;
//Ensure the GPS is ON and location permission enabled for the application.
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
if (!PermissionCheck.getInstance().checkGPSPermission(this,locationManager)) {
//GPS not enabled for the application.
} else if (!PermissionCheck.getInstance().checkLocationPermission(this)) {
//Location permission not given.
} else {
Toast.makeText(MainActivity.this,"Fetching Location",Toast.LENGTH_SHORT).show();
try {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,this);
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,5000,this);
} catch(Exception e)
{
Toast.makeText(MainActivity.this,"ERROR: Cannot start location listener",Toast.LENGTH_SHORT).show();
}
}
}
@Override
protected void onPause() {
if (locationManager != null) {
//Check needed in case of API level 23.
if (ActivityCompat.checkSelfPermission(this,Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this,Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
}
try {
locationManager.removeUpdates(this);
} catch (Exception e) {
}
}
locationManager = null;
super.onPause();
}
@Override
protected void onStop() {
super.onStop();
}
@Override
public void onMapReady(GoogleMap googleMap)
{
mMap = googleMap;
//mMap.getUiSettings().setZoomControlsEnabled(true);
mMap.getUiSettings().setCompassEnabled(true);
mMap.getUiSettings().setAllGesturesEnabled(true);
mMap.setOnMarkerClickListener(this);
}
/**
* @desc LocationListener Interface Methods implemented.
*/
@Override
public void onLocationChanged(Location location)
{
double lat = location.getLatitude();
double lng = location.getLongitude();
currentLatLng = new LatLng(lat,lng);
if(firstRefresh)
{
//Add Start Marker.
currentMarker = mMap.addMarker(new MarkerOptions().position(currentLatLng).title("Current Position"));//.icon(BitmapDescriptorFactory.fromResource(R.drawable.location)));
firstRefresh = false;
destMarker = mMap.addMarker(new MarkerOptions().position(Constants.POINT_DEST).title("Destination"));//.icon(BitmapDescriptorFactory.fromResource(R.drawable.location)));
mMap.moveCamera(CameraUpdateFactory.newLatLng(Constants.POINT_DEST));
mMap.animateCamera(CameraUpdateFactory.zoomTo(15));
getRoutingPath();
}
else
{
currentMarker.setPosition(currentLatLng);
}
}
@Override
public void onStatusChanged(String provider,int status,Bundle extras) {}
@Override
public void onProviderEnabled(String provider) {}
@Override
public void onProviderDisabled(String provider) {}
/**
* @desc MapMarker Interface Methods Implemented.
*/
@Override
public boolean onMarkerClick(Marker marker)
{
if(marker.getTitle().contains("Destination"))
{
//Do some task on dest pin click
}
else if(marker.getTitle().contains("Current"))
{
//Do some task on current pin click
}
return false;
}
/**
*@desc Routing Listener interface methods implemented.
**/
@Override
public void onRoutingFailure(RouteException e)
{
Toast.makeText(MainActivity.this,"Routing Failed",Toast.LENGTH_SHORT).show();
}
@Override
public void onRoutingStart() { }
@Override
public void onRoutingSuccess(ArrayList<Route> list,int i)
{
try
{
//Get all points and plot the polyLine route.
List<LatLng> listPoints = list.get(0).getPoints();
PolylineOptions options = new PolylineOptions().width(5).color(Color.BLUE).geodesic(true);
Iterator<LatLng> iterator = listPoints.iterator();
while(iterator.hasNext())
{
LatLng data = iterator.next();
options.add(data);
}
//If line not null then remove old polyline routing.
if(line != null)
{
line.remove();
}
line = mMap.addPolyline(options);
//Show distance and duration.
txtDistance.setText("Distance: " + list.get(0).getDistanceText());
txtTime.setText("Duration: " + list.get(0).getDurationText());
//Focus on map bounds
mMap.moveCamera(CameraUpdateFactory.newLatLng(list.get(0).getLatLgnBounds().getCenter()));
LatLngBounds.Builder builder = new LatLngBounds.Builder();
builder.include(currentLatLng);
builder.include(Constants.POINT_DEST);
LatLngBounds bounds = builder.build();
mMap.animateCamera(CameraUpdateFactory.newLatLngBounds(bounds,50));
}
catch (Exception e)
{
Toast.makeText(MainActivity.this,"EXCEPTION: Cannot parse routing response",Toast.LENGTH_SHORT).show();
}
}
@Override
public void onRoutingCancelled()
{
Toast.makeText(MainActivity.this,"Routing Cancelled",Toast.LENGTH_SHORT).show();
}
/**
* @method getRoutingPath
* @desc Method to draw the google routed path.
*/
private void getRoutingPath()
{
try
{
//Do Routing
Routing routing = new Routing.Builder()
.travelMode(Routing.TravelMode.DRIVING)
.withListener(this)
.waypoints(currentLatLng,Constants.POINT_DEST)
.build();
routing.execute();
}
catch (Exception e)
{
Toast.makeText(MainActivity.this,"Unable to Route",Toast.LENGTH_SHORT).show();
}
}
}
Constants.java
/**
* @class Constants
* @desc Constant class for holding values at runtime.
*/
public class Constants
{
//Map LatLong points
public static LatLng POINT_DEST = null;
}
activity_map.xml
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:map="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="@+id/viewA"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="0.1"
android:orientation="horizontal">
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.packagename.MainActivity" />
</LinearLayout>
<LinearLayout
android:id="@+id/viewB"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="0.9"
android:gravity="center|left"
android:paddingLeft="20dp"
android:background="#FFFFFF"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16dp"
android:text="Distance ?"
android:paddingTop="3dp"
android:paddingLeft="3dp"
android:paddingBottom="3dp"
android:id="@+id/txt_distance" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="17dp"
android:paddingLeft="3dp"
android:text="Duration ?"
android:id="@+id/txt_time" />
</LinearLayout>
</LinearLayout>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:clickable="true"
android:src="@android:drawable/ic_dialog_map"
app:layout_anchor="@id/viewA"
app:layout_anchorGravity="bottom|right|end"/>
</android.support.design.widget.CoordinatorLayout>
