private void drawPolyLine() {
    List list = Arrays.asList(latlngs);
    List<LatLng> polylines = new ArrayList<>();
    polylines.addAll(list);
    polylines.add(latlngs[0]);
    // 绘制纹理PolyLine
    PolylineOptions polylineOptions =
            new PolylineOptions().points(polylines).width(25).customTexture(mGreenTexture)
                    .dottedLine(true);
    mPolyline = (Polyline) mBaiduMap.addOverlay(polylineOptions);

    // 添加小车marker
    OverlayOptions markerOptions = new MarkerOptions()
            .flat(true)
            .anchor(0.5f, 0.5f)
            .icon(mBitmapCar).
                    position(polylines.get(0))
            .rotate((float) getAngle(0));
    mMoveMarker = (Marker) mBaiduMap.addOverlay(markerOptions);

}
                     
                

/**
* 循环进行移动逻辑
*/
public void moveLooper() {
    new Thread() {
        public void run() {
            while (true) {
                for (int i = 0; i < latlngs.length - 1; i++) {
                    final LatLng startPoint = latlngs[i];
                    final LatLng endPoint = latlngs[i + 1];
                    mMoveMarker.setPosition(startPoint);
                    mHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            // refresh marker's rotate
                            if (mMapView == null) {
                                return;
                            }
                            mMoveMarker.setRotate((float) getAngle(startPoint, endPoint));
                        }
                    });
                    double slope = getSlope(startPoint, endPoint);
                    // 是不是正向的标示
                    boolean isYReverse = (startPoint.latitude > endPoint.latitude);
                    boolean isXReverse = (startPoint.longitude > endPoint.longitude);
                    double intercept = getInterception(slope, startPoint);
                    double xMoveDistance =
                            isXReverse ? getXMoveDistance(slope) : -1 * getXMoveDistance(slope);
                    double yMoveDistance =
                            isYReverse ? getYMoveDistance(slope) : -1 * getYMoveDistance(slope);

                    for (double j = startPoint.latitude, k = startPoint.longitude;
                            !((j > endPoint.latitude)
                                    ^ isYReverse)
                                && !((k > endPoint.longitude)
                                                ^ isXReverse); ) {
                        LatLng latLng = null;

                        if (slope == Double.MAX_VALUE) {
                            latLng = new LatLng(j, k);
                            j = j - yMoveDistance;
                        } else if (slope == 0.0) {
                            latLng = new LatLng(j, k - xMoveDistance);
                            k = k - xMoveDistance;
                        } else {
                            latLng = new LatLng(j, (j - intercept) / slope);
                            j = j - yMoveDistance;
                        }

                        final LatLng finalLatLng = latLng;
                        if (finalLatLng.latitude == 0 && finalLatLng.longitude == 0) {
                            continue;
                        }
                        mHandler.post(new Runnable() {
                            @Override
                            public void run() {
                                if (mMapView == null) {
                                    return;
                                }
                                mMoveMarker.setPosition(finalLatLng);
                                // 设置 Marker 覆盖物的位置坐标,并同步更新与Marker关联的InfoWindow的位置坐标.
                                mMoveMarker.setPositionWithInfoWindow(finalLatLng);
                            }
                        });
                        try {
                            Thread.sleep(TIME_INTERVAL);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
        }

    }.start();
}