安卓高德地图获取比例尺控件的view
时间: 2023-11-06 13:08:28 浏览: 53
您可以使用 `AMap.getMapScreenMarkers()` 方法获取地图上所有的 Marker,然后通过计算 Marker 相对于地图的像素位置来获取比例尺控件的 View。具体实现步骤如下:
1. 获取地图对象:
```java
AMap aMap = mapView.getMap();
```
2. 获取地图上所有的 Marker:
```java
List<Marker> markers = aMap.getMapScreenMarkers();
```
3. 遍历所有的 Marker ,找到一个靠近屏幕中央的 Marker:
```java
int centerX = mapView.getWidth() / 2;
int centerY = mapView.getHeight() / 2;
Marker nearestMarker = null;
float nearestDistance = Float.MAX_VALUE;
for (Marker marker : markers) {
Point point = aMap.getProjection().toScreenLocation(marker.getPosition());
float distance = (float) Math.sqrt(Math.pow(point.x - centerX, 2) + Math.pow(point.y - centerY, 2));
if (distance < nearestDistance) {
nearestMarker = marker;
nearestDistance = distance;
}
}
```
4. 计算比例尺控件的 View 的位置:
```java
if (nearestMarker != null) {
View scaleView = mapView.findViewById(Resources.getSystem().getIdentifier("amap_scale_view", "id", "android"));
int[] location = new int[2];
scaleView.getLocationInWindow(location);
Point markerPoint = aMap.getProjection().toScreenLocation(nearestMarker.getPosition());
int x = markerPoint.x - location[0];
int y = markerPoint.y - location[1];
View scaleWidget = scaleView.findViewById(Resources.getSystem().getIdentifier("scale", "id", "android"));
int width = scaleWidget.getWidth();
int height = scaleWidget.getHeight();
int left = x - width / 2;
int top = y - height / 2;
int right = left + width;
int bottom = top + height;
Rect rect = new Rect(left, top, right, bottom);
// rect 就是比例尺控件的 View 在屏幕上的位置
}
```