我正在我的应用程序中开发谷歌地图,但它没有显示地图只显示网格线,请任何人帮助我这是什么问题?我在气泡上绘制文本,当超过 2 个气泡位于相同的位置时,在这种情况下文本相互重叠。更改 API 密钥后,地图将显示,但我的第二个问题仍然存在。我必须在地图和文本上绘制气泡(该气泡上的属性大小)假设列表 4 的大小然后应该在气泡上绘制 4。我一直实现了这些,但没有显示期望的输出。
drawable = this.getResources().getDrawable(R.drawable.bluedot);
drawable1 = this.getResources().getDrawable(R.drawable.bluedot_large);
overlay = new GoogleMapViewOverlay(drawable,mapView,activity);
//GoogleMapViewOverlay 方法如下:-
public GoogleMapViewOverlay(Drawable drawable, MapView mapView,
Activity activity2)
{
//super(drawable);
super(boundCenterBottom(drawable));
setLastFocusedIndex(-1);
populate();
arrayList1 = new ArrayList<Applicationdataset>() ;
items = new ArrayList<OverlayItem>();
marker = drawable;
mContext = mapView.getContext();
mc = mapView.getController();
this.activity = activity2;
DB = new DatabaseHelper(activity2);
}
//将项目添加为
if(point != null)
{
if(arrayList.get(i).getUnitstotal().equalsIgnoreCase("1"))
{
oi = overlay.createItem(i);
System.out.println("listing when 1 value is"+arrayList.get(i).getUnitstotal());
overlay.addItem(oi);
}
else if(!arrayList.get(i).getUnitstotal().equalsIgnoreCase("1"))
{
oi = overlay.createItem(i);
System.out.println("listing when more value is "+ arrayList.get(i).getUnitstotal());
if(overlay!=null)
{
overlay.addItem(oi);
//overlay.draw(canvas, mapView, shadow);
}
}
}
//draw方法在气泡上绘制文本
@Override
public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when )
{
super.draw(canvas, mapView, false);
arrayList1 = arrayList;
for (int index = 0; index < items.size(); index++)
{
OverlayItem item = items.get(index);
GeoPoint point = item.getPoint();
Point ptScreenCoord = new Point();
mapView.getProjection().toPixels(point, ptScreenCoord);
//Paint
Paint paint = new Paint();
paint.setStyle(Style.STROKE);
paint.setTextAlign(Paint.Align.CENTER);
paint.setTypeface((Typeface.defaultFromStyle(Typeface.BOLD)));
paint.setTextSize(20);
paint.setColor(Color.WHITE);
paint.setFilterBitmap(false);//true
if(arrayList.get(index).getUnitstotal().equalsIgnoreCase("1"))
canvas.drawText("", ptScreenCoord.x, ptScreenCoord.y-20,paint);
else
{
canvas.drawText(arrayList.get(index).getUnitstotal().toString(), ptScreenCoord.x, ptScreenCoord.y-40, paint);
}
}
return true;
}