jsonから緯度と経度を解析した後、Google Mapにマーカーを配置する方法は？

Question

私は100以上の場所名、緯度と経度が含まれている解析jsonファイルを持っています。
今まで私は地名、緯度と経度を取得することができます。

これらの値をすべてGoogleマップにプロットし、それぞれのマーカーを配置します。

また、Googleマップに配置されたマーカーをユーザーがタッチしたときにJSONを解析して取得した位置名を表示したいとします。

私はそれを解決します。以下を参照：

更新： main.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" > 

<com.google.android.maps.MapView 
    android:id="@+id/mapView" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:enabled="true" 
    android:clickable="true" 
    android:apiKey="0hlQp-ys3VmVGNLoJ0aGYQhDmBH5KC-ZQmc3yNA" 
    /> 

<LinearLayout 
    android:id="@+id/zoom" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentBottom="true" 
    android:layout_centerHorizontal="true" /> 

</RelativeLayout> 

ShowMapActivity.java

public class ShowMapActivity extends MapActivity { 

private static String url = "http://10.0.2.2/test/myfile.php"; 
JSONArray root = null; 
private static final String TAG_ROOT = "root"; 
private static final String TAG_LATTITUDE = "lattitude"; 
private static final String TAG_LONGITUDE = "longitude"; 
private static final String TAG_NAME="name"; 

MapController mc; 
GeoPoint p; 

double lattitudeValue; 
double longitudeValue; 
String lattitude; 
String longitude; 
String name; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    // showing MapView 
    MapView mapView = (MapView) findViewById(R.id.mapView); 
    LinearLayout zoomLayout = (LinearLayout) findViewById(R.id.zoom); 
    View zoomView = mapView.getZoomControls(); 
    zoomLayout.addView(zoomView, new LinearLayout.LayoutParams(
      LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); 
    mapView.displayZoomControls(true); 
    mc = mapView.getController(); 
    String coordinates[] = { "53.5146152", "-2.2857034" }; 
    double lat = Double.parseDouble(coordinates[0]); 
    double lng = Double.parseDouble(coordinates[1]); 
    p = new GeoPoint((int) (lat * 1E6), (int) (lng * 1E6)); 
    mc.animateTo(p); 
    mc.setZoom(10); 
    mapView.invalidate(); 


    // Parsing JSON value and Read location name, lattitude, longitude from JSON 


    JSONParser jParser = new JSONParser(); 

    JSONObject json = jParser.getJSONFromUrl(url); 
    System.out.println("Testingggg..." + json.length()); 

    try { 

     root = json.getJSONArray(TAG_ROOT); 
     for (int i = 0; i < root.length(); i++) { 
      JSONObject c = root.getJSONObject(i); 
      name=c.getString(TAG_NAME); //Getting location name 
      lattitude = c.getString(TAG_LATTITUDE); //Getting lattitude value in string 
      longitude = c.getString(TAG_LONGITUDE); //Getting longitude value in string 
      lattitudeValue = Double.parseDouble(lattitude); //converting string lattitude value to double 
      longitudeValue=Double.parseDouble(longitude); //converting string longitude value to double 



       List<Overlay> mapOverlays = mapView.getOverlays(); 
      Drawable drawable = this.getResources().getDrawable(
        R.drawable.locationmarker); 
      HelloItemizedOverlay itemizedoverlay = new HelloItemizedOverlay(
        drawable, this); 
      GeoPoint point = new GeoPoint((int) (lattitudeValue * 1E6), 
        (int) (longitudeValue * 1E6)); 
      OverlayItem overlayitem = new OverlayItem(point, name, "I'm in" 
        + name); 

      itemizedoverlay.addOverlay(overlayitem); 
      mapOverlays.add(itemizedoverlay); 



     } 
    } catch (JSONException e) { 
     e.printStackTrace(); 
    } 
} 

@Override 
protected boolean isRouteDisplayed() { 
    // TODO Auto-generated method stub 
    return false; 
} 
} 

CustomItemizedOverlay.java

を

}

HelloItemizedOverlay.java

public class HelloItemizedOverlay extends ItemizedOverlay<OverlayItem> { 
private ArrayList<OverlayItem> mOverlays = new ArrayList<OverlayItem>(); 
private Context mContext; 

public HelloItemizedOverlay(Drawable defaultMarker, Context context) { 
    super(boundCenterBottom(defaultMarker)); 
    mContext = context; 
} 

public void addOverlay(OverlayItem overlay) { 
    mOverlays.add(overlay); 
    populate(); 
} 

@Override 
protected OverlayItem createItem(int i) { 
    return mOverlays.get(i); 
} 

@Override 
public int size() { 
    return mOverlays.size(); 
} 

@Override 
protected boolean onTap(int index) { 
    OverlayItem item = mOverlays.get(index); 
    AlertDialog.Builder dialog = new AlertDialog.Builder(mContext); 
    dialog.setTitle(item.getTitle()); 
    dialog.setMessage(item.getSnippet()); 
    dialog.show(); 
    return true; 
} 
} 

Answer 1

Drawable srcdrawable = getApplicationContext().getResources().getDrawable(R.drawable.pin_blue); 
CustomItemizedOverlay srcitemizedOverlay = new CustomItemizedOverlay(srcdrawable, getApplicationContext()); 
forloop(setoflocations){ 
GeoPoint srcpoint = new GeoPoint((int)(Double.parseDouble(lat) * 1E6),(int)(Double.parseDouble(lng)* 1E6)); 
OverlayItem srcoverlayitem = new OverlayItem(srcpoint, "Hello!", "This is your Location."); 
if(srcitemizedOverlay!=null && mapController!=null){ 
srcitemizedOverlay.addOverlay(overlayitem); 
mapController.animateTo(point); 
animatePoint = point; 
} 
} 
mapView.getOverlays().clear(); 
mapView.getOverlays().add(srcitemizedOverlay); 

もし位置 のセットを取得した後にも、以下CustomItemizedOverlay.javaクラス以下

ある）（OnCreateイベントに上記のコードを使用し

public class CustomItemizedOverlay extends ItemizedOverlay<OverlayItem> { 

    private final ArrayList<OverlayItem> mapOverlays = new ArrayList<OverlayItem>(); 

    private Context context; 

    public CustomItemizedOverlay(Drawable defaultMarker) { 
     super(boundCenterBottom(defaultMarker)); 
    } 

    public CustomItemizedOverlay(Drawable defaultMarker, Context context) { 
     this(defaultMarker); 
     this.context = context; 
    } 

    @Override 
    protected OverlayItem createItem(int i) { 
     return mapOverlays.get(i); 
    } 

    @Override 
    public int size() { 
     return mapOverlays.size(); 
    } 

    public void addOverlay(OverlayItem overlay) { 
     mapOverlays.add(overlay); 
     this.populate(); 
    } 

} 

RefこれはLINKです。

Answer 2

チェックこのアウトlink

が、それはあなたを助けることを願っています。..