Question

我正在一个Android项目上，我想在Google Map上的2点之间绘制路线。我已经成功绘制了源和目的地之间的路线。但是我有一个问题，即有时候我想在两个以上的点之间绘制一条路径，那时候我编写的代码正在绘制第一个和最后一个位置之间的路径，并离开中点位置。我真正想要的是我的路线应该经过中点到目的地。我该如何实现？

Answer 1

您可以分别在三个点之间绘制路线。因此，首先绘制从起点到中点的路线，然后从中点到终点。然后，如果要添加所需的标记。

Answer 2

您可以使用GoogleMaps API Dcoumented Here中的PolylineOptions，并继续添加所有应包含在路线中的点。你可以做这样的事情

import java.util.ArrayList;
import java.util.List;

import org.easymock.EasyMock;
import org.easymock.EasyMockRunner;
import org.easymock.EasyMockSupport;
import org.easymock.Mock;
import org.easymock.TestSubject;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockHttpServletResponse;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@RunWith(EasyMockRunner.class)
public class CustomAuthenticationFilterTest extends EasyMockSupport{

    @TestSubject
    CustomAuthenticationFilter customAuthenticationFilter  = new CustomAuthenticationFilter();

    @Mock
    UsernamePasswordAuthenticationFilter usernamePasswordAuthenticationFilter;

    @Test
    public void testAttemptAuthentication() throws Exception{   
        MockHttpServletRequest request = new MockHttpServletRequest();
        request.setParameter("j_username", "Sundar1234");
        request.setParameter("j_password", "Sundar1234$$");
        MockHttpServletResponse response = new MockHttpServletResponse();
        SimpleGrantedAuthority authority = new SimpleGrantedAuthority("ROLE_USER");
        List<SimpleGrantedAuthority> updatedAuthorities = new ArrayList<SimpleGrantedAuthority>();
        updatedAuthorities.add(authority);
        User user = new User("Sundar1234", "Sundar1234$$", updatedAuthorities);
        Authentication auth = new UsernamePasswordAuthenticationToken(user,null);
        EasyMock.expect(usernamePasswordAuthenticationFilter.attemptAuthentication(request, response)).andReturn(auth);
        EasyMock.replay(usernamePasswordAuthenticationFilter);
        Assert.assertNotNull(customAuthenticationFilter.attemptAuthentication(request, response));
        EasyMock.verify(usernamePasswordAuthenticationFilter);
    }
}

希望这可以解决您的问题。

如何在多个LatLong Android地图之间绘制路线？

2 个答案: