android - 如何在我的微调器中使用 getItemAtPosition 从谷歌地图中的火力基地使用 android studio

Question

我需要帮助。在这里，我已将医院名称从 firebase 加载到 spinner 我想如何获取项目Atposition，因为当我单击医院名称时，它必须在我的应用程序中选择并单击 getDirection 按钮，因此它将重新加载到谷歌地图并标记特定的医院选择所以现在如何在我的java代码中做，但我知道缺少一些东西但找不到我请帮助我提前谢谢

Java code 

//init Db
        hospitalRef = FirebaseDatabase.getInstance().getReference("hospital");
        //init interface
        iFirebaseLoaddone = this;

        hospitalRef.addListenerForSingleValueEvent(new ValueEventListener() {

            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {

                List<Hospital> hospital = new ArrayList<>();
                for (DataSnapshot hospitalsnapshot : dataSnapshot.getChildren()) {
                    hospital.add(hospitalsnapshot.getValue(Hospital.class));
                }
                iFirebaseLoaddone.onFirebaseLoadSuccess(hospital);

            }
            @Override
            public void onCancelled(DatabaseError databaseError) {
                iFirebaseLoaddone.onFirebaseLoadFailed(databaseError.getMessage());
            }
        });

        searchableSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

                String seleceted =parent.getItemAtPosition(position).toString();
                Log.e("clicked",""+ seleceted);


                hospitalRef.addChildEventListener(new ChildEventListener() {

                    @Override
                    public void onChildAdded(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
                        setMarker(dataSnapshot);

                      //  Comment comment = dataSnapshot.getValue(Comment.class);

                    }

                    @Override
                    public void onChildChanged(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
                        setMarker(dataSnapshot);

                    }

                    @Override
                    public void onChildRemoved(@NonNull DataSnapshot dataSnapshot) {

                    }

                    @Override
                    public void onChildMoved(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {

                    }

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

                    }


                });
            }
            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });

 @Override
    public void onFirebaseLoadSuccess(List<Hospital> hospitalList) {

        hospitals = hospitalList;

        //get all data
        List<String> id = new ArrayList<>();
        List<String> name_list = new ArrayList<>();
        List<Double> latitude = new ArrayList<>();
        List<Double> longitude = new ArrayList<>();
        for (Hospital hospital : hospitalList)
            // id.add(hospital.getId());
            name_list.add(hospital.getName());


        ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, name_list);
        searchableSpinner.setAdapter(adapter);

    }

Answer 1

您可以从微调器中获取选定的值，如下所示，

String seleceted =parent.getItemAtPosition(position).toString(); //your code
String selected = name_list.get(position); //another way to get selected name

您可以从微调器获取纬度和经度- 来自firebase DB 的医院名称。

Query query = reference.orderByChild("name").equalTo(seleceted);
     query.addChildEventListener(new ChildEventListener() {
                       @Override
                       public void onChildAdded(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
                           double latitude = dataSnapshot.child("latitude").getValue();
                           double longitude = dataSnapshot.child("longitude").getValue();
                           setMarker(latitude,longitude);
                       }

                       @Override
                       public void onChildChanged(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {

                       }

                       @Override
                       public void onChildRemoved(@NonNull DataSnapshot dataSnapshot) {

                       }

                       @Override
                       public void onChildMoved(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {

                       }

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

                       }
                   });