高德地图---点聚合+显示屏幕内的maker+多线程

1.首先需要创建两个ArrayList（一个存放所有的maker数据，一个存放屏幕内的maker数据）

    private ArrayList<MarkerOptions> markerOptionsListInView = new ArrayList<MarkerOptions>();
    private ArrayList<MarkerOptions> markerOptionsListall = new ArrayList<MarkerOptions>();

2.第二步把maker数据添加到markerOptionsListall 里边

private void addMarkersToMap() {

        int size = chargList.size();
        for (int i = 0; i < size; i++) {

            double wei =chargList.get(i).getPoi_wei();
            double jing = chargList.get(i).getPoi_jing();
            LatLng latlng = new LatLng(wei, jing);
            markerOptionsListall.add(new MarkerOptions().position(latlng).title(i + ""));
}

3.在添加屏幕移动的监控，然后去动态判断屏幕内的maker是否需要聚合

@Override
    public void onCameraChangeFinish(CameraPosition arg0) {
        // TODO Auto-generated method stub
        resetMarks();
    }

    private void resetMarks() {
        // 开始刷新
        //executorService.execute(new Runnable() {
   
   

            @Override
            public void run() {
                // TODO Auto-generated method stub

                Projection projection = mAMap.getProjection();
                Point p = null;
                markerOptionsListInView.clear();
                // 获取在当前视野内的marker;提高效率

                ArrayList<MyGaodeImageView> clustersMarker = new ArrayList<MyGaodeImageView>();
                for (MarkerOptions mp : markerOptionsListall) {
                    p = projection.toScreenLocation(mp.getPosition());
                    if (p.x < 0 || p.y < 0 || p.x > screenWidth || p.y > screenHeight || p.x == 0 || p.y == 0
                            || p.x == screenWidth || p.y == screenHeight) {
                        // 不添加到计算的列表中
                    } else {