在地图上标记位置名称？

Posted 2023-04-14

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【中文标题】在地图上标记位置名称？【英文标题】：Mark name of location on map? 【发布时间】：2011-08-29 18:41:12 【问题描述】：

在我的 android 应用中，我想在地图上标记一个位置（我知道位置的地址）。当我在地图上标记它时，我也想显示位置的名称。我该怎么做？

我有这个：OverlayItem(p ,"Kaufland", "Magic Kingdom")，但在地图上只显示点，没有名字。

这是我的代码：

package com.ShoppingList.Shops;


import java.io.IOException;
import java.util.List;
import java.util.Locale;

import com.ShoppingList.R;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;

import java.util.ArrayList;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.OverlayItem;

public class ShowMap extends MapActivity 
    private MapView mapView;
    MapController mc;

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

        mapView = (MapView) findViewById(R.id.mapview);
        mapView.setBuiltInZoomControls(true);
        mapView.setClickable(true);

        Drawable marker=getResources().getDrawable(R.drawable.pushpin);
        marker.setBounds(0, 0, marker.getIntrinsicWidth(),
        marker.getIntrinsicHeight());

        InterestingLocations funPlaces = new InterestingLocations(marker);
        mapView.getOverlays().add(funPlaces);
        GeoPoint pt = funPlaces.getCenter(); // get the first-ranked point
        mapView.getController().setCenter(pt);
        mapView.getController().setZoom(15);

    
    @Override
    protected boolean isLocationDisplayed() 
    return false;
    
    @Override
    protected boolean isRouteDisplayed() 
    return false;
    
    class InterestingLocations extends ItemizedOverlay 
        private List locations = new ArrayList();
        private Drawable marker;
        String adresa;
        public InterestingLocations(Drawable marker)
        
        super(marker);
        this.marker=marker;
        // create locations of interest
        Bundle bundle = getIntent().getExtras();
        adresa = bundle.getString("adress");

        Geocoder geoCoder = new Geocoder(ShowMap.this, Locale.getDefault());
        try 
        List addresses = geoCoder.getFromLocationName(adresa, 5);
            String add = "";
            if (addresses.size() > 0) 
                GeoPoint p = new GeoPoint((int) (addresses.get(0).getLatitude() * 1E6), 
                        (int) (addresses.get(0).getLongitude() * 1E6));

                locations.add(new OverlayItem(p ,"Kaufland", "Magic Kingdom"));

            
         catch (IOException e) 
            e.printStackTrace();
        
        populate();
    
    @Override
    public void draw(Canvas canvas, MapView mapView, boolean shadow) 
    super.draw(canvas, mapView, shadow);
    boundCenterBottom(marker);
    
    @Override
    protected OverlayItem createItem(int i) 
    return locations.get(i);
    
    @Override
    public int size() 
    return locations.size();

【问题讨论】：

【参考方案1】：

我不敢相信没有更简单的方法，但它看起来并不存在。这是一种方法： http://binwaheed.blogspot.com/2011/05/android-display-title-on-marker-in.html

除非你想要丑陋的文本，否则我强烈建议使用抗锯齿：

TextPaint paintText = new TextPaint(Paint.ANTI_ALIAS_FLAG);

【讨论】：

【参考方案2】：

我使用 Toast 来显示标记所指示的文本。这是我为演示项目解决它的方法：

-- 开始 Location.java --

package com.cb2enterprises.geocode;

import com.google.android.maps.GeoPoint;

public class Location 

public GeoPoint Point;
public String Title;
public String Snippet;

public Location(GeoPoint point, String title, String snippet)

    Point = point;
    Title = title;
    Snippet = snippet;

-- 结束--

-- 开始 PushpinOverlay.java --

package com.cb2enterprises.geocode;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.widget.Toast;
import android.view.Gravity;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.OverlayItem;
import java.util.ArrayList;
import java.util.List;


public class PushpinOverlay extends ItemizedOverlay<OverlayItem> 

    private List<Location> mItems;
    Context mContext = null;

    public PushpinOverlay(Context context, Drawable marker)

    super(boundCenterBottom(marker));
    mContext = context;


public void setItems(ArrayList<Location> items)

    mItems = items;
    populate();


@Override
protected OverlayItem createItem(int i) 

    return new OverlayItem(mItems.get(i).Point, mItems.get(i).Title, mItems.get(i).Snippet);


@Override
public int size() 
    return mItems.size();


@Override
protected boolean onTap(int i)

    Toast msg = Toast.makeText(mContext, mItems.get(i).Title, Toast.LENGTH_LONG);
    msg.setGravity(Gravity.CENTER, msg.getXOffset() / 2, msg.getYOffset() / 2);
    msg.show();
    return true;

-- 结束--

-- 开始 GeoCodeDemoActivity.java --