Question

我搜索了如何在Google地图中绘制路线方向。我找到了一些链接。但是在那些代码中，它并没有画出两个地方之间的路径。谁能帮助我在两个步伐之间划出路径？我正在使用Android studio 2.1并编译sdk版本24

activity_maps.xml

library(aod)
wald.test(b = coef(model1), Sigma = vcov(model1), Terms = 1:2)

MapsActivity.java

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MapsActivity">

    <fragment xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:map="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        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.example.shyamali.maptest.MapsActivity"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="bottom"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="#cc3b60a7"
            android:orientation="horizontal">

            <Button
                android:id="@+id/buttonSetFrom"
                android:text="Set From"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />

            <Button
                android:id="@+id/buttonSetTo"
                android:text="Set To"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />


            <Button
                android:id="@+id/buttonCalcDistance"
                android:text="Calc Distance"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />


        </LinearLayout>
    </LinearLayout>
</FrameLayout>

Answer 1

在github上查看此示例。根据使用Google Map Direction API在Google地图上的地址文字查找两个地点之间的路线

包com.itshareplus.googlemapdemo;

import android.Manifest;
import android.app.ProgressDialog;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

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.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
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.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import Modules.DirectionFinder;
import Modules.DirectionFinderListener;
import Modules.Route;

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, DirectionFinderListener {

    private GoogleMap mMap;
    private Button btnFindPath;
    private EditText etOrigin;
    private EditText etDestination;
    private List<Marker> originMarkers = new ArrayList<>();
    private List<Marker> destinationMarkers = new ArrayList<>();
    private List<Polyline> polylinePaths = new ArrayList<>();
    private ProgressDialog progressDialog;

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

        btnFindPath = (Button) findViewById(R.id.btnFindPath);
        etOrigin = (EditText) findViewById(R.id.etOrigin);
        etDestination = (EditText) findViewById(R.id.etDestination);

        btnFindPath.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                sendRequest();
            }
        });
    }

    private void sendRequest() {
        String origin = etOrigin.getText().toString();
        String destination = etDestination.getText().toString();
        if (origin.isEmpty()) {
            Toast.makeText(this, "Please enter origin address!", Toast.LENGTH_SHORT).show();
            return;
        }
        if (destination.isEmpty()) {
            Toast.makeText(this, "Please enter destination address!", Toast.LENGTH_SHORT).show();
            return;
        }

        try {
            new DirectionFinder(this, origin, destination).execute();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;
        LatLng hcmus = new LatLng(10.762963, 106.682394);
        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(hcmus, 18));
        originMarkers.add(mMap.addMarker(new MarkerOptions()
                .title("Đại học Khoa học tự nhiên")
                .position(hcmus)));

        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);
    }


    @Override
    public void onDirectionFinderStart() {
        progressDialog = ProgressDialog.show(this, "Please wait.",
                "Finding direction..!", true);

        if (originMarkers != null) {
            for (Marker marker : originMarkers) {
                marker.remove();
            }
        }

        if (destinationMarkers != null) {
            for (Marker marker : destinationMarkers) {
                marker.remove();
            }
        }

        if (polylinePaths != null) {
            for (Polyline polyline:polylinePaths ) {
                polyline.remove();
            }
        }
    }

    @Override
    public void onDirectionFinderSuccess(List<Route> routes) {
        progressDialog.dismiss();
        polylinePaths = new ArrayList<>();
        originMarkers = new ArrayList<>();
        destinationMarkers = new ArrayList<>();

        for (Route route : routes) {
            mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(route.startLocation, 16));
            ((TextView) findViewById(R.id.tvDuration)).setText(route.duration.text);
            ((TextView) findViewById(R.id.tvDistance)).setText(route.distance.text);

            originMarkers.add(mMap.addMarker(new MarkerOptions()
                    .icon(BitmapDescriptorFactory.fromResource(R.drawable.start_blue))
                    .title(route.startAddress)
                    .position(route.startLocation)));
            destinationMarkers.add(mMap.addMarker(new MarkerOptions()
                    .icon(BitmapDescriptorFactory.fromResource(R.drawable.end_green))
                    .title(route.endAddress)
                    .position(route.endLocation)));

            PolylineOptions polylineOptions = new PolylineOptions().
                    geodesic(true).
                    color(Color.BLUE).
                    width(10);

            for (int i = 0; i < route.points.size(); i++)
                polylineOptions.add(route.points.get(i));

            polylinePaths.add(mMap.addPolyline(polylineOptions));
        }
    }
}

如何在谷歌地图中的两个地方之间绘制路线方向？

1 个答案: