Java 来自Firebase的纬度和经度坐标不正确，所有立柱的纬度和经度坐标相同

用户从Firebase检索特定

post

的位置总是作为相同的错误位置返回，总是相同的位置。我已经尝试了各种方法来解决这个问题，这样用户为他们的事件创建的特定位置就会保存到

GoogleMap

中，但是所有帖子都会得到相同的位置，这是不正确的

我一直在使用其他一些关于位置问题的帖子，但都没有帮到我

请告诉我我做错了什么

MapActivityUser.java

public class MapsActivityUser extends FragmentActivity implements OnMapReadyCallback {

    private GoogleMap map;

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

        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
    }

    @Override
    public void onMapReady(GoogleMap googleMap) {
        map = googleMap;

        DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Posts");
        reference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                    if (snapshot.hasChild("location")) {
                        Post post = snapshot.getValue(Post.class);
                        double latitude = post.getLatitude();
                        double longitude = post.getLongitude();

                        LatLng location = new LatLng(latitude, longitude);
                        map.addMarker(new MarkerOptions().position(location).title("Event location"));
                        map.moveCamera(CameraUpdateFactory.newLatLngZoom(location, 10));
                    }
                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });
    }
}

    package com.e.events.Model;

public class Post {

    private String postid;
    private String postimage;
    private String description;
    private String publisher;
    private String text_event;
    private String text_location;
    private String text_date_time;
    private Long timestamp;
    private MyLocation location;

    public Post(String description, String postId, String postImage, String publisher, Long timestamp,
                String text_event, String text_location, String text_date_time, MyLocation location) {
        this.postid = postid;
        this.postimage = postimage;
        this.description = description;
        this.publisher = publisher;
        this.text_event = text_event;
        this.text_location = text_location;
        this.text_date_time = text_date_time;
        this.timestamp = timestamp;
        this.location = location;
    }

    public class MyLocation {

        private double latitude;
        private double longitude;
    }

    public Post() {
    }

    public String getPostid() {
        return postid;
    }

    public void setPostid(String postid) {
        this.postid = postid;
    }

    public String getPostimage() {
        return postimage;
    }

    public void setPostimage(String postimage) {
        this.postimage = postimage;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getPublisher() {
        return publisher;
    }

    public void setPublisher(String publisher) {
        this.publisher = publisher;
    }

    public String getText_event() {
        return text_event;
    }

    public void setText_event(String text_event) {
        this.text_event = text_event;
    }

    public String getText_location() {
        return text_location;
    }

    public void setText_location(String text_location) {
        this.text_location = text_location;
    }

    public String getText_date_time() {
        return text_date_time;
    }

    public void setText_date_time(String text_date_time) {
        this.text_date_time = text_date_time;
    }

    public Long getTimestamp() {
        return timestamp;
    }

    public void setTimestamp(Long timestamp) {
        this.timestamp = timestamp;
    }

    public MyLocation getLocation() {
        return location;
    }

    public void setLocation(MyLocation location) {
        this.location = location;
    }
}

PostActivity.java

public class MapsActivityUser extends FragmentActivity implements OnMapReadyCallback {

    private GoogleMap map;

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

        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
    }

    @Override
    public void onMapReady(GoogleMap googleMap) {
        map = googleMap;

        DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Posts");
        reference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                    if (snapshot.hasChild("location")) {
                        Post post = snapshot.getValue(Post.class);
                        double latitude = post.getLatitude();
                        double longitude = post.getLongitude();

                        LatLng location = new LatLng(latitude, longitude);
                        map.addMarker(new MarkerOptions().position(location).title("Event location"));
                        map.moveCamera(CameraUpdateFactory.newLatLngZoom(location, 10));
                    }
                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });
    }
}

    package com.e.events.Model;

public class Post {

    private String postid;
    private String postimage;
    private String description;
    private String publisher;
    private String text_event;
    private String text_location;
    private String text_date_time;
    private Long timestamp;
    private MyLocation location;

    public Post(String description, String postId, String postImage, String publisher, Long timestamp,
                String text_event, String text_location, String text_date_time, MyLocation location) {
        this.postid = postid;
        this.postimage = postimage;
        this.description = description;
        this.publisher = publisher;
        this.text_event = text_event;
        this.text_location = text_location;
        this.text_date_time = text_date_time;
        this.timestamp = timestamp;
        this.location = location;
    }

    public class MyLocation {

        private double latitude;
        private double longitude;
    }

    public Post() {
    }

    public String getPostid() {
        return postid;
    }

    public void setPostid(String postid) {
        this.postid = postid;
    }

    public String getPostimage() {
        return postimage;
    }

    public void setPostimage(String postimage) {
        this.postimage = postimage;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getPublisher() {
        return publisher;
    }

    public void setPublisher(String publisher) {
        this.publisher = publisher;
    }

    public String getText_event() {
        return text_event;
    }

    public void setText_event(String text_event) {
        this.text_event = text_event;
    }

    public String getText_location() {
        return text_location;
    }

    public void setText_location(String text_location) {
        this.text_location = text_location;
    }

    public String getText_date_time() {
        return text_date_time;
    }

    public void setText_date_time(String text_date_time) {
        this.text_date_time = text_date_time;
    }

    public Long getTimestamp() {
        return timestamp;
    }

    public void setTimestamp(Long timestamp) {
        this.timestamp = timestamp;
    }

    public MyLocation getLocation() {
        return location;
    }

    public void setLocation(MyLocation location) {
        this.location = location;
    }
}

---

您没有正确设置模型。更新您的帖子，如下所示：

Post.java：

public class Post {

    private String postid;
    private String postimage;
    private String description;
    private String publisher;
    private String text_event;
    private String text_location;
    private String text_date_time;
    private Long timestamp;
    private MyLocation location;

    //getter-setter

}

public class MyLocation {

    private double latitude;
    private double longitude;


    public double getLatitude() {
        return latitude;
    }

    public void setLatitude(double latitude) {
        this.latitude = latitude;
    }

    public double getLongitude() {
        return longitude;
    }

    public void setLongitude(double longitude) {
        this.longitude = longitude;
    }
}

MyLocation.java：

public class Post {

    private String postid;
    private String postimage;
    private String description;
    private String publisher;
    private String text_event;
    private String text_location;
    private String text_date_time;
    private Long timestamp;
    private MyLocation location;

    //getter-setter

}

public class MyLocation {

    private double latitude;
    private double longitude;


    public double getLatitude() {
        return latitude;
    }

    public void setLatitude(double latitude) {
        this.latitude = latitude;
    }

    public double getLongitude() {
        return longitude;
    }

    public void setLongitude(double longitude) {
        this.longitude = longitude;
    }
}

然后像这样解析

Post post = snapshot.getValue(Post.class);
double latitude = post.getLocation().getLatitude();
double longitude = post.getLocation().getLongitude();

---

从何处将位置保存到firebase？您是否保存了正确的位置？检查您的数据库，从my

MapsActivityPublisher.java

中手动添加

Post

bean类。@Md.Asaduzzaman。所以坐标被保存到Firebase，然后其他想要知道事件位置的用户单击TextView，这会将他带到在事件位置设置标记的地图。我贴了一张Firebase的照片。我能做些什么来修复它？字面上没有idea@Md.Asaduzzaman添加了

PostActivity.java

你是说36.62和119.30不来了？我不明白这部分

私人MyLocation位置什么是
MyLocation
是变量类型吗？它不应该是双精度的吗？检查一下你的数据库，那里的
纬度
和
经度
不是
Post
的直接子对象。它是一个名为
location
的对象。因此，您必须创建一个对象来保存该数据检查我的答案，我创建了一个名为MyLocation的类，它保存
纬度
和
经度
有一个错误。在此代码中，双纬度=post.getLocation（）.getLatitude（）
getLatitude（）的
getLatitude（）返回红色。对于LongitudeDid，您在代码中实现了
MyLocation
和它的属性的getter setter，也是这样吗？