Android地图API V2变化MyLocation图标 [英] Android Maps API v2 Change MyLocation Icon

问题描述

我想取代Android地图V2采用了我的位置（小蓝点/箭头）与我自己的形象的默认图标。我已经创建了自己的瓷砖提供商带来的几张地图这是predominantly蓝色，因此默认我的位置的图标是很难看到的。 previously我刚才覆盖的 MyLocationOverlay ，但似乎并没有成为一个在新的API绘制方法。任何帮助将是巨大的！

I would like to replace the default icon that Android Maps V2 uses for 'My Location' (The little blue dot/arrow) with my own image. I've created my own tile provider that brings in a few maps which are predominantly blue and as such the default My Location icon is very hard to see. Previously I would have just overridden the draw method of the MyLocationOverlay, but there doesn't seem to be one in the new api. Any help would be great!

编辑：我还需要图标，能够旋转，同样的方式，箭头就取决于哪种方式，你都面临。所以我不能只是使用普通的标记 :(基本上我只需要创建为箭头的自定义图像。

I also need the icon to be able to rotate, the same way that the arrow does depending on which way you are facing. So i can't just use a normal marker :( Basically I just need to create a custom image for that arrow..

更新大家好，更新​​到谷歌现在可以打平的标记和标记旋转而这正是我需要的。

Update Hi All, the update to Google play now allows flat markers and marker rotation which is exactly what I needed.

推荐答案

最近更新谷歌播放服务，现在可以使用'平'标记和旋转它们而这正是我需要的。下面是我实现它的方式一个简单的版本。有可能是一个公平一点我可以做的优化和调整动画，但它的工作的时刻。任何反馈意见是值得欢迎的。

The latest update to Google Play Services now allows you to use 'Flat' Markers and rotate them which is exactly what I needed. Here is a simple version of the way I implemented it. There is probably a fair bit I can do to optimize and tweak the animation, but it does the job for the moment. Any feedback is welcome.

Marker mPositionMarker;
GoogleMap mMap;

@Override
public void onLocationChanged(Location location) {

    if (location == null)
        return;

    if (mPositionMarker == null) {

        mPositionMarker = mMap.addMarker(new MarkerOptions()
                .flat(true)
                .icon(BitmapDescriptorFactory
                        .fromResource(R.drawable.positionIndicator))
                .anchor(0.5f, 0.5f)
                .position(
                        new LatLng(location.getLatitude(), location
                                .getLongitude())));
    }

    animateMarker(mPositionMarker, location); // Helper method for smooth
                                                // animation

    mMap.animateCamera(CameraUpdateFactory.newLatLng(new LatLng(location
            .getLatitude(), location.getLongitude())));

}

public void animateMarker(final Marker marker, final Location location) {
    final Handler handler = new Handler();
    final long start = SystemClock.uptimeMillis();
    final LatLng startLatLng = marker.getPosition();
    final double startRotation = marker.getRotation();
    final long duration = 500;

    final Interpolator interpolator = new LinearInterpolator();

    handler.post(new Runnable() {
        @Override
        public void run() {
            long elapsed = SystemClock.uptimeMillis() - start;
            float t = interpolator.getInterpolation((float) elapsed
                    / duration);

            double lng = t * location.getLongitude() + (1 - t)
                    * startLatLng.longitude;
            double lat = t * location.getLatitude() + (1 - t)
                    * startLatLng.latitude;

            float rotation = (float) (t * location.getBearing() + (1 - t)
                    * startRotation);

            marker.setPosition(new LatLng(lat, lng));
            marker.setRotation(rotation);

            if (t < 1.0) {
                // Post again 16ms later.
                handler.postDelayed(this, 16);
            }
        }
    });
}

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