我假设您基本上想要用自己的指示器替换方向指示器?如果您正在寻找完整的“行驶路线”,则已经有答案了。
这个答案建议从LocationListener
覆盖开始,以设置自定义图标(在MarkerOptions
上使用.icon(yourIcon)
):
public class MyLocationLayer implements LocationListener {
private GoogleMap map;
private BitmapDescriptor markerDescriptor;
private boolean drawAccuracy = true;
private int accuracyStrokeColor = Color.argb(255, 130, 182, 228);
private int accuracyFillColor = Color.argb(100, 130, 182, 228);
private Marker positionMarker;
private Circle accuracyCircle;
public MyLocationLayer(GoogleMap map, int markerResource) {
this.map = map;
markerDescriptor = BitmapDescriptorFactory.fromResource(markerResource);
}
public void setDrawAccuracy(boolean drawAccuracy) {
this.drawAccuracy = drawAccuracy;
}
public void setAccuracyStrokeColor(int color) {
this.accuracyStrokeColor = color;
}
public void setAccuracyFillColor(int color) {
this.accuracyFillColor = color;
}
@Override
public void onLocationChanged(Location location) {
double latitude = location.getLatitude();
double longitude = location.getLongitude();
float accuracy = location.getAccuracy();
if (positionMarker != null) {
positionMarker.remove();
}
final MarkerOptions positionMarkerOptions = new MarkerOptions()
.position(new LatLng(latitude, longitude))
.icon(markerDescriptor)
.anchor(0.5f, 0.5f);
positionMarker = map.addMarker(positionMarkerOptions);
if (accuracyCircle != null) {
accuracyCircle.remove();
}
if (drawAccuracy) {
final CircleOptions accuracyCircleOptions = new CircleOptions()
.center(new LatLng(latitude, longitude))
.radius(accuracy)
.fillColor(accuracyFillColor)
.strokeColor(accuracyStrokeColor)
.strokeWidth(2.0f);
accuracyCircle = map.addCircle(accuracyCircleOptions);
}
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
}
从这里,您可以在new MarkerOptions()
之后添加.rotation()
来设置设备的当前旋转。这可以通过在Fragment/Activity上具有一个参数(例如private Int rotation = 0
),并更新它来完成。
通过在Fragment/Activity中实现SensorEventListener
,并在onSensorChanged(event: SensorEvent)
内更新设备旋转的缓存来进行此更新。
一种从加速度计和磁场中获取旋转(方位角)的相当复杂的方法是on this answer,以及其他几种替代方法。
确保适当地注销您的侦听器!