我正在开发 android 中的地图服务,我想在我的地图中搜索一个特定的地方,比如“柏林”。为此,我在我的地图中放置了一个 EDITTEXT,每当我输入名称时,我都希望在我的地图中用标记指向那个地方。
这是我的 HelloItemizedOverlay 类:
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;
}
}
这是我的主要课程:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mapView = (MapView) findViewById(R.id.mapView);
mapSearchBox = (EditText)findViewById(R.id.search);
mapSearchBox.setOnTouchListener(new View.OnTouchListener(){
public boolean onTouch(View view, MotionEvent motionEvent) {
List<Address> addresses = geocoder.getFromLocationName(mapSearchBox.getText().toString(),5);
if(addresses.size() > 0)
{
GeoPoint p = new GeoPoint( (int) (addresses.get(0).getLatitude() * 1E6),
(int) (addresses.get(0).getLongitude() * 1E6));
controller.animateTo(p);
controller.setZoom(12);
List<Overlay> mapOverlays = mapView.getOverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.icon);
HelloItemizedOverlay itemizedoverlay = new HelloItemizedOverlay(drawable,this);
OverlayItem overlayitem = new OverlayItem(p,"","");
itemizedoverlay.addOverlay(overlayitem);
mapOverlays.add(itemizedoverlay);
mapView.invalidate();
mapSearchBox.setText("");
}
else
{
AlertDialog.Builder adb = new AlertDialog.Builder(GoogleMapActivity.this);
adb.setTitle("Google Map");
adb.setMessage("Please Provide the Proper Place");
adb.setPositiveButton("Close",null);
adb.show();
}
return false;
}});
LocationManager locationManager = (LocationManager) getSystemService(this.LOCATION_SERVICE);
LocationListener listener = new MylocationListener();
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,0,0,listener);
}
在这里,我在该行中收到一条错误消息:
Drawable drawable = this.getResources().getDrawable(R.drawable.icon);
说 getresource 方法未定义新视图。触摸监听器;下一行还显示了另一个错误:
HelloItemizedOverlay itemizedoverlay = new HelloItemizedOverlay(drawable,this);
构造函数 HelloItemizedOverlay 未定义。
有人知道建议吗??如果是这样,请帮个忙。提前致谢!!