片段中可点击的Google Maps标记 [英] Clickable Google Maps marker in Fragment

问题描述

当我单击加载时动态添加的标记(调用API，获取位置并在地图上显示它们)时，我要在此处完成的任务是能够显示AlertDialog.这是在片段onCreateView中完成的.

What I am trying to accomplish here is be able to show a AlertDialog when I click on a marker that is dynamically added on load (call an API, get positions and show them on map). This is done in the fragments onCreateView.

地图在这里加载:

@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    FragmentManager fm = getChildFragmentManager();
    mapFragment = (SupportMapFragment) fm.findFragmentById(R.id.map_container);
    if (mapFragment == null) {
        mapFragment = SupportMapFragment.newInstance();
        fm.beginTransaction().replace(R.id.map_container, mapFragment).commit();
    }
}

稍后，我从SupportMapFragment切换到GoogleMap:

@Override
public void onResume() {
    super.onResume();
    if (mMap == null && mapFragment != null) {
        mapFragment.getMapAsync(new OnMapReadyCallback() {
            @Override
            public void onMapReady(GoogleMap googleMap) {
                mMap = Tools.configBasicGoogleMap(googleMap);
                mMap.setMapType(sharedPref.getMapType());
            }
        });
    }
}

因此，从逻辑上讲，我的地图应该已经准备好为mMap.现在，我想显示一个AlertDialog，所以在片段的类定义中执行implements GoogleMap.OnMarkerClickListener并在此处实现它:

So, logically, my Map should be ready as mMap. Now, I want to show a AlertDialog, so I do implements GoogleMap.OnMarkerClickListener in the class definition for the fragment and implement it here:

@Override
public boolean onMarkerClick(final Marker marker) {
    Toast.makeText(getContext(), "Hello world", Toast.LENGTH_SHORT).show();
    AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
    builder.setTitle("Confirmation");
    builder.setMessage("Pour confirmer le rapport, appuyez sur + 1.\nSi le rapport est faux, cliquez sur - 1.");
    builder.setPositiveButton("+ 1", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id){
            URL link = null;
            try {
                link = new URL(S.base_url + "report/increment/" + marker.getTag().toString());
            } catch (MalformedURLException e) {
                e.printStackTrace();
            }
            try {
                BufferedReader in = new BufferedReader(
                        new InputStreamReader(
                                link.openStream()));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    });
    AlertDialog ab = builder.create();
    ab.show();
    return false;
}

但是，甚至连Toast都没有显示出来……当我单击一个标记时，会显示方向"和在Google Maps中打开"按钮，并且地图以标记为中心，但是我的方法没有开始.

But not even the Toast doesn't show up... When I click on a marker I get the Directions and Open in Google Maps buttons, and the map centers itself on the marker, but my method doesn't start.

总而言之，从逻辑上来说，当我单击加载的这些标记之一时，onMarkerClick方法应该触发自身，但是这种情况永远不会发生！知道为什么吗?谢谢.

To conclude, logically when I click one of these markers that I load, the method onMarkerClick should trigger itself, but this never happens! Any idea why? Thanks.

推荐答案

我不知道为什么，但是 Google Maps API 不能用作片段的实现.以下代码可能对您有用.您只需要为本地分配markerClickListener即可，而不是实现MarkerClickListener.

I don't know why but Google Maps API can't used as implement to fragments. Following code may work it for you. You just need to assign markerClickListener for local, not implementing MarkerClickListener.

   //Detect location and set on map
    mMapView.getMapAsync(new OnMapReadyCallback() {
        @SuppressLint("MissingPermission")
        @Override
        public void onMapReady(GoogleMap mMap) {
            googleMap = mMap;
            // Bla
            // Bla
            // Bla your codes about map
            googleMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() {
                @Override
                public boolean onMarkerClick(Marker marker) {
                    // Triggered when user click any marker on the map
                    return false;
                }
            });
        }
    });

这篇关于片段中可点击的Google Maps标记的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！