android - Android - Listview 中包含的 MapView

Question

目前我正在尝试在 ListView 中放置一个 MapView。有没有人在这方面取得任何成功？甚至可能吗？这是我的代码：

            ListView myList = (ListView) findViewById(android.R.id.list);
        List<Map<String, Object>> groupData = new ArrayList<Map<String, Object>>();

        Map<String, Object> curGroupMap = new HashMap<String, Object>();
        groupData.add(curGroupMap);
        curGroupMap.put("ICON", R.drawable.back_icon);
        curGroupMap.put("NAME","Go Back");
        curGroupMap.put("VALUE","By clicking here");

        Iterator it = data.entrySet().iterator();
        while (it.hasNext()) 
        {
            //Get the key name and value for it
            Map.Entry pair = (Map.Entry)it.next();
            String keyName = (String) pair.getKey();
            String value = pair.getValue().toString();

            if (value != null)
            {
                //Add the parents -- aka main categories
                curGroupMap = new HashMap<String, Object>();
                groupData.add(curGroupMap);

                //Push the correct Icon
                if (keyName.equalsIgnoreCase("Phone"))
                    curGroupMap.put("ICON", R.drawable.phone_icon);
                else if (keyName.equalsIgnoreCase("Housing"))
                    curGroupMap.put("ICON", R.drawable.house_icon);
                else if (keyName.equalsIgnoreCase("Website"))
                    curGroupMap.put("ICON", R.drawable.web_icon);
                else if (keyName.equalsIgnoreCase("Area Snapshot"))
                    curGroupMap.put("ICON", R.drawable.camera_icon);
                else if (keyName.equalsIgnoreCase("Overview"))
                    curGroupMap.put("ICON", R.drawable.overview_icon);  
                else if (keyName.equalsIgnoreCase("Location"))
                    curGroupMap.put("ICON", R.drawable.map_icon);
                else
                    curGroupMap.put("ICON", R.drawable.icon);

                //Pop on the Name and Value
                curGroupMap.put("NAME", keyName);
                curGroupMap.put("VALUE", value);
            }
        }

        curGroupMap = new HashMap<String, Object>();
        groupData.add(curGroupMap);
        curGroupMap.put("ICON", R.drawable.back_icon);
        curGroupMap.put("NAME","Go Back");
        curGroupMap.put("VALUE","By clicking here");

        //Set up adapter
        mAdapter = new SimpleAdapter(
                mContext,
                groupData,
                R.layout.exp_list_parent,
                new String[] { "ICON", "NAME", "VALUE" },
                new int[] { R.id.photoAlbumImg, R.id.rowText1, R.id.rowText2  }
        );

        myList.setAdapter(mAdapter); //Bind the adapter to the list 

在此先感谢您的帮助！！

Answer 1

发布一个相当老的答案的替代解决方案（实际上超过 2 年），但我认为这可能会帮助那些可能像我一样偶然发现这篇文章的人。

注意：这对于只需要在“地图”中显示位置但不需要在ListView. 实际的地图可以显示在一个细节页面上，点击ListView

正如@CaseyB 已经指出的那样，这MapView是一种沉重的观点。为了解决这方面的问题（并使我的生活变得更轻松；-)），我选择使用我的应用程序所需的几个参数来构建一个 URL，就像您为静态 Google 地图所做的那样。您可以在这里获得更多选项：https ://developers.google.com/maps/documentation/staticmaps/

首先，当我为 my 构建数据时ListView，我将诸如纬度和经度之类的数据传递给一个字符串，其中包含一些从上述链接中获取的静态变量。我从 Facebook API 获得我的坐标。

我用来构建链接的代码：

String getMapURL = "http://maps.googleapis.com/maps/api/staticmap?zoom=18&size=560x240&markers=size:mid|color:red|"  
+ JOLocation.getString("latitude") 
+ "," 
+ JOLocation.getString("longitude") 
+ "&sensor=false";

上面构造的 URL，当在浏览器中使用时，返回一个.PNG文件。然后，在我adapter的活动中，我使用@Fedor 的延迟加载来显示从之前构造的 URL 生成的图像，以显示在 custom 中ListView。您当然可以选择自己的方法来显示它Map（实际上是地图的图像）。

最终结果的示例。

目前，我有大约 30 多个 Checkin Maps（我将它与 Facebook SDK 一起使用）ListView，但用户可以拥有 100 个，并且绝对没有关于它变慢的报告。

我怀疑，考虑到问题以来已经过去的时间，这可能对 OP 没有帮助，但希望它有助于其他用户将来登陆此页面。

Answer 2

首先，我不认为一次显示多个 MapView 会起作用。MapActivity 记录每个进程只支持一个：

“每个进程只支持一个 MapActivity。同时运行的多个 MapActivity 可能会以意想不到的方式干扰。”

（http://code.google.com/android/add-ons/google-apis/reference/index.html）

它没有明确说您不能在 MapActivity 中拥有多个 MapView，但我认为它们也会干扰，无论它们位于哪种父 ViewGroup 中。

其次，您可以考虑使用静态地图 API 来获取包含在 ListView 中的简单图像——一个成熟的 MapView 在任何情况下都可能是不必要的重量级：

http://code.google.com/apis/maps/documentation/staticmaps/

您可能面临的一个问题是静态地图 API 限制“用户”的使用，这可能意味着通过 IP（它不需要 API 密钥），并且移动网络可能会因 IP 使用限制而出现问题。我不确定这将如何发挥作用。

Answer 3

在这种情况下，您可以像添加任何其他视图一样将 MapView 添加到列表中。 这是有关如何创建自定义列表适配器的快速教程。但我必须提醒你，MapView 是一个非常重的视图，如果你试图在屏幕上显示一堆，你会发现应用程序运行缓慢！您可以只向列表项添加一个按钮，将用户带到另一个页面，其中包含更多信息，包括地图。

Answer 4

从 GoogleMapSample 代码本身来看，这是可能的：

/**
 * This shows to include a map in lite mode in a ListView.
 * Note the use of the view holder pattern with the
 * {@link com.google.android.gms.maps.OnMapReadyCallback}.
 */
public class LiteListDemoActivity extends AppCompatActivity {

    private ListFragment mList;

    private MapAdapter mAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.lite_list_demo);

        // Set a custom list adapter for a list of locations
        mAdapter = new MapAdapter(this, LIST_LOCATIONS);
        mList = (ListFragment) getSupportFragmentManager().findFragmentById(R.id.list);
        mList.setListAdapter(mAdapter);

        // Set a RecyclerListener to clean up MapView from ListView
        AbsListView lv = mList.getListView();
        lv.setRecyclerListener(mRecycleListener);

    }

    /**
     * Adapter that displays a title and {@link com.google.android.gms.maps.MapView} for each item.
     * The layout is defined in <code>lite_list_demo_row.xml</code>. It contains a MapView
     * that is programatically initialised in
     * {@link #getView(int, android.view.View, android.view.ViewGroup)}
     */
    private class MapAdapter extends ArrayAdapter<NamedLocation> {

        private final HashSet<MapView> mMaps = new HashSet<MapView>();

        public MapAdapter(Context context, NamedLocation[] locations) {
            super(context, R.layout.lite_list_demo_row, R.id.lite_listrow_text, locations);
        }


        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            View row = convertView;
            ViewHolder holder;

            // Check if a view can be reused, otherwise inflate a layout and set up the view holder
            if (row == null) {
                // Inflate view from layout file
                row = getLayoutInflater().inflate(R.layout.lite_list_demo_row, null);

                // Set up holder and assign it to the View
                holder = new ViewHolder();
                holder.mapView = (MapView) row.findViewById(R.id.lite_listrow_map);
                holder.title = (TextView) row.findViewById(R.id.lite_listrow_text);
                // Set holder as tag for row for more efficient access.
                row.setTag(holder);

                // Initialise the MapView
                holder.initializeMapView();

                // Keep track of MapView
                mMaps.add(holder.mapView);
            } else {
                // View has already been initialised, get its holder
                holder = (ViewHolder) row.getTag();
            }

            // Get the NamedLocation for this item and attach it to the MapView
            NamedLocation item = getItem(position);
            holder.mapView.setTag(item);

            // Ensure the map has been initialised by the on map ready callback in ViewHolder.
            // If it is not ready yet, it will be initialised with the NamedLocation set as its tag
            // when the callback is received.
            if (holder.map != null) {
                // The map is already ready to be used
                setMapLocation(holder.map, item);
            }

            // Set the text label for this item
            holder.title.setText(item.name);

            return row;
        }

        /**
         * Retuns the set of all initialised {@link MapView} objects.
         *
         * @return All MapViews that have been initialised programmatically by this adapter
         */
        public HashSet<MapView> getMaps() {
            return mMaps;
        }
    }

    /**
     * Displays a {@link LiteListDemoActivity.NamedLocation} on a
     * {@link com.google.android.gms.maps.GoogleMap}.
     * Adds a marker and centers the camera on the NamedLocation with the normal map type.
     */
    private static void setMapLocation(GoogleMap map, NamedLocation data) {
        // Add a marker for this item and set the camera
        map.moveCamera(CameraUpdateFactory.newLatLngZoom(data.location, 13f));
        map.addMarker(new MarkerOptions().position(data.location));

        // Set the map type back to normal.
        map.setMapType(GoogleMap.MAP_TYPE_NORMAL);
    }

    /**
     * Holder for Views used in the {@link LiteListDemoActivity.MapAdapter}.
     * Once the  the <code>map</code> field is set, otherwise it is null.
     * When the {@link #onMapReady(com.google.android.gms.maps.GoogleMap)} callback is received and
     * the {@link com.google.android.gms.maps.GoogleMap} is ready, it stored in the {@link #map}
     * field. The map is then initialised with the NamedLocation that is stored as the tag of the
     * MapView. This ensures that the map is initialised with the latest data that it should
     * display.
     */
    class ViewHolder implements OnMapReadyCallback {

        MapView mapView;

        TextView title;

        GoogleMap map;

        @Override
        public void onMapReady(GoogleMap googleMap) {
            MapsInitializer.initialize(getApplicationContext());
            map = googleMap;
            NamedLocation data = (NamedLocation) mapView.getTag();
            if (data != null) {
                setMapLocation(map, data);
            }
        }

        /**
         * Initialises the MapView by calling its lifecycle methods.
         */
        public void initializeMapView() {
            if (mapView != null) {
                // Initialise the MapView
                mapView.onCreate(null);
                // Set the map ready callback to receive the GoogleMap object
                mapView.getMapAsync(this);
            }
        }

    }

    /**
     * RecycleListener that completely clears the {@link com.google.android.gms.maps.GoogleMap}
     * attached to a row in the ListView.
     * Sets the map type to {@link com.google.android.gms.maps.GoogleMap#MAP_TYPE_NONE} and clears
     * the map.
     */
    private AbsListView.RecyclerListener mRecycleListener = new AbsListView.RecyclerListener() {

        @Override
        public void onMovedToScrapHeap(View view) {
            ViewHolder holder = (ViewHolder) view.getTag();
            if (holder != null && holder.map != null) {
                // Clear the map and free up resources by changing the map type to none
                holder.map.clear();
                holder.map.setMapType(GoogleMap.MAP_TYPE_NONE);
            }

        }
    };

    /**
     * Location represented by a position ({@link com.google.android.gms.maps.model.LatLng} and a
     * name ({@link java.lang.String}).
     */
    private static class NamedLocation {

        public final String name;

        public final LatLng location;

        NamedLocation(String name, LatLng location) {
            this.name = name;
            this.location = location;
        }
    }
}

完整代码位于： https ://github.com/googlemaps/android-samples/blob/master/ApiDemos/app/src/main/java/com/example/mapdemo/LiteListDemoActivity.java

Answer 5

我今天遇到了同样的问题 - 原来你必须在你的MapActivity中创建 MapView否则你会得到一个错误，比如Unable to Inflate View com.google.maps.MapView等等......而不是将这个 MapView 传递给你的 ListAdapter并在需要时将其吐出。我必须将 MapView 放置在RelativeLayout中以根据需要调整高度和宽度（出于某种原因，MapView 的行为不是“正常”的视图方式）。喜欢的可以问我详细信息：）