2019独角兽企业重金招聘Python工程师标准>>> 
/** * 调节地图到正好放置查询范围的所有点 * @param centerLatLng 中心点 * @param range 查询范围（米） */
private void adjustCamera(LatLng centerLatLng,int range) {
//http://www.eoeandroid.com/blog-1107295-47621.html
//当前缩放级别下的比例尺
//"每像素代表" + scale + "米"
float scale = g_aMap.getScalePerPixel();
//代表range（米）的像素数量
int pixel = Math.round(range / scale);
//小范围，小缩放级别（比例尺较大），有精度损失
Projection projection = g_aMap.getProjection();
//将地图的中心点，转换为屏幕上的点
Point center = projection.toScreenLocation(centerLatLng);
//获取距离中心点为pixel像素的左、右两点（屏幕上的点
Point right = new Point(center.x + pixel, center.y);
Point left = new Point(center.x - pixel, center.y);
//将屏幕上的点转换为地图上的点
LatLng rightLatlng = projection.fromScreenLocation(right);
LatLng LeftLatlng = projection.fromScreenLocation(left);
LatLngBounds bounds = LatLngBounds.builder().include(rightLatlng).include(LeftLatlng).build();
//bounds.contains();
g_aMap.getMapScreenMarkers();
//调整可视范围
//aMap.moveCamera(CameraUpdateFactory.newLatLngBounds(LatLngBounds.builder().include(rightLatlng).include(LeftLatlng).build(), 10)); }
}代码片段，点击区域，显示该区域上的点
LatLng latLng = marker.getPosition();
//缩放级别
float zoom = g_aMap.getCameraPosition().zoom;
//"每像素代表" + scale + "米"
float scale = g_aMap.getScalePerPixel();
float range = scale * zoom;
Circle circle = g_aMap.addCircle(new CircleOptions().center(latLng)
.radius(range).strokeColor(getResources().getColor(R.color.color_translate))
.fillColor(getResources().getColor(R.color.color_translate)).strokeWidth(2));