谷歌地图 v2 标记动画 [英] Google Map v2 Marker Animation

问题描述

有没有人知道如何在 google map api v2 中实现这个动画?在这里查看.我想知道这是如何完成的.如果有人有任何关于此的示例代码，请告诉我.

Do anyone have idea how this animation's implementation is possible in google map api v2. Check out this here. I would like to know how this is done. Please let me know if anyone have any sample code regarding this.

提前致谢.

推荐答案

我找到了一个对我有用的解决方案:

I found a solution that worked for me:

final LatLng target = NEW_LOCATION;

final long duration = 400;
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
Projection proj = map.getProjection();

Point startPoint = proj.toScreenLocation(marker.getPosition());
final LatLng startLatLng = proj.fromScreenLocation(startPoint);

final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
    @Override
    public void run() {
        long elapsed = SystemClock.uptimeMillis() - start;
        if (elapsed > duration) {
            elapsed = duration;
        }
        float t = interpolator.getInterpolation((float) elapsed / duration);
        double lng = t * target.longitude + (1 - t) * startLatLng.longitude;
        double lat = t * target.latitude + (1 - t) * startLatLng.latitude;
        marker.setPosition(new LatLng(lat, lng));
        if (t < 1.0) {
            // Post again 10ms later.
            handler.postDelayed(this, 10);
        } else {
            // animation ended
        }
    }
});

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