如何解决地图上的OnTap事件未触发
| 您好,我无法触发ontap()事件 我想在每次点击地图时添加一个标记,并且当我点击另一个地理位置时,第一个标记应该消失并且该标记应添加到新位置... 到现在为止,我到了这一点..有人可以告诉我我要去哪里错了!! 提前致谢 源代码public class GetLocation extends MapActivity implements OnClickListener {
MapView mapView;
MapController mc;
GeoPoint p;
int range;
String category;
Button view,traffic;
private static final String Tag = \"GetLocation class\";
ZoomControls zoomControls;
Canvas canvas;
MapOverlay itemizedoverlay;
List<Overlay> mapOverlays;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(\"Tag\",\"Inside onCreate\");
setContentView(R.layout.main);
mapView = (MapView) findViewById(R.id.myMapView1);
LinearLayout zoom = (LinearLayout)findViewById(R.id.zoom);
mapView.setReticleDrawMode(
MapView.ReticleDrawMode.DRAW_RETICLE_UNDER);
// Drawable drawable = this.getResources().getDrawable(R.drawable.mark);
view=(Button)findViewById(R.id.BtnView);
traffic=(Button)findViewById(R.id.BtnTraffic);
Bundle extra=getIntent().getExtras();
if(extra != null)
{
category=extra.getString(\"category\");
range=extra.getInt(\"range\");
}
view.setonClickListener(this);
traffic.setonClickListener(this);
zoomControls = (ZoomControls) findViewById(R.id.zoomcontrols);
zoomControls.setonZoomInClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mc.zoomIn();
}
});
zoomControls.setonZoomOutClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mc.zoomOut();
}
});
mapOverlays = mapView.getoverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.mark);
itemizedoverlay = new MapOverlay(drawable,this);
mc = mapView.getController();
mapView.invalidate();
mc.setZoom(17);
mapView.invalidate();
// mapView.setSatellite(true);
mapView.setStreetView(true);
// mapView.setonClickListener(this);
Log.d(\"Tag\",\"Exit onCreate\");
}
class MapOverlay extends com.google.android.maps.itemizedoverlay<OverlayItem>
{
private ArrayList<OverlayItem> mOverlay = new ArrayList<OverlayItem>();
private Context mContext;
private boolean isPinch = false;
public MapOverlay(Drawable defaultMarker,Context context) {
super(boundCenterBottom((defaultMarker)));
mContext = context;
// Todo Auto-generated constructor stub
}
public void addOverlayItem(OverlayItem overlayItem)
{
if(!mOverlay.contains(overlayItem)){
mOverlay.add(overlayItem);
}
populate();
}
@Override
protected OverlayItem createItem(int i) {
// Todo Auto-generated method stub
return null;
}
@Override
public int size() {
// Todo Auto-generated method stub
return mOverlay.size();
}
public boolean onTap(GeoPoint p,MapView map)
{
if ( isPinch )
{
Log.i(\"onTap\",\"in if!\");
return false;
}
else
{
Log.i(\"onTap\",\"TAP!\");
if ( p!=null )
{
OverlayItem overlayitem = new OverlayItem(p,\" \",\" \");
itemizedoverlay.addOverlayItem(overlayitem);
mapOverlays.add(itemizedoverlay);
Toast.makeText(getBaseContext(),p.getLatitudeE6() / 1E6 + \",on Tap\" +
p.getLongitudeE6() /1E6,Toast.LENGTH_SHORT).show();
Log.d(\"Tag\",\"Exit TAp\");
return true; // We handled the tap
}
else
{
return false; // Null GeoPoint
}
}
}
}
解决方法
这是我的代码
希望你能有所想法
Point p1=new Point(0,0);
mapView.getProjection().toPixels(mapPoint,p1);// mapPoint is GeoPoint object
inDrag=item; // item get from List object and inDrag is an OverlayItem object
items.remove(inDrag); items is list object
populate();
GeoPoint pt=mapView.getProjection().fromPixels(p1.x+xDragImageOffset,p1.y);
OverlayItem toDrop=new OverlayItem(pt,inDrag.getTitle(),inDrag.getSnippet());
items.add(toDrop);
populate();
, 看看这篇文章:http://mobiforge.com/developing/story/using-google-maps-android
它包含一个部分:\“添加标记\”
另外,这里还有另一个更高级的示例:
https://github.com/commonsguy/cw-advandroid/blob/master/Maps/NooYawkTouch/src/com/commonsware/android/maps/NooYawk.java
希望对您有帮助。
, 当用户点击标记时,基本上会触发itemizedoverlay中的点击功能
您将创建一个类来扩展覆盖以检测轻敲。
检查此叠加示例
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。