Android 百度地图marker中图片不显示的教程

//定义Maker坐标点 
LatLng point = new LatLng(39.963175, 116.400244); 
//构建Marker图标 
BitmapDescriptor bitmap = BitmapDescriptorFactory 
  .fromResource(R.drawable.icon_marka); 
//构建MarkerOption，用于在地图上添加Marker 
OverlayOptions option = new MarkerOptions() 
  .position(point) 
  .icon(bitmap); 
//在地图上添加Marker，并显示 
mBaiduMap.addOverlay(option);

@Nullable 
 @Override 
 public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { 
   this.inflater = inflater; 
   this.container = container; 
   if (markerView == null) { 
     viewHolder = new ViewHolder(); 
     markerView = (FrameLayout) inflater.inflate(R.layout.layout_bitmap_descriptor, container, true).findViewById(R.id.bitmapFl);//此处一定要find到bitmapFl，否则此处会报错加载的对象不是要求的布局对象 
     viewHolder.imageView = (ImageView) markerView.findViewById(R.id.picSdv); 
     markerView.setTag(viewHolder); 
   } 
   return inflater.inflate(R.layout.fragment_main, container, false); 
 } 
 
ivate class ViewHolder { 
   ImageView imageView; 
 } 

  /**
   * 初始化位置标注信息
   *
   * @param geoUserEntities:地理用户数据（包含头像地址、经纬度）
   */
  private void initOverlayOptions(List geoUserEntities) {
    baiduMap.clear();
    AvatarEntity avatarEntityTemp;
    for (int i = 0; i < geoUserEntities.size(); i++) {
      if (geoUserEntities.get(i) == null) {
        continue;
      }
      final Marker[] marker = {null};
      final GeoUserEntity geoUserEntityTemp = geoUserEntities.get(i);
      avatarEntityTemp = geoUserEntityTemp.getAvatar();
      final BitmapDescriptor[] pic = {null};
      if (avatarEntityTemp != null && !StringUtils.isEmpty(avatarEntityTemp.getImageUrl())) {
        returnPicView(avatarEntityTemp.getMid(), new ResultListener() {//图片加载完毕后的回调方法
          @Override
          public void onReturnResult(Object object) {
            super.onReturnResult(object);
            pic[0] = BitmapDescriptorFactory.fromView((View) object);
            putDataToMarkerOptions(pic[0], geoUserEntityTemp);
          }
        });
      } else if (avatarEntityTemp == null) {
        pic[0] = BitmapDescriptorFactory.fromResource(R.mipmap.anchor);
        putDataToMarkerOptions(pic[0], geoUserEntityTemp);
      }
    }
  }

  /**
   * 显示marker，设置marker传递的数据
   *
   * @param pic
   * @param geoUserEntityTemp
   */
  private void putDataToMarkerOptions(BitmapDescriptor pic, GeoUserEntity geoUserEntityTemp) {
    double[] locationTemp = geoUserEntityTemp.getLocation();
    if (locationTemp != null && locationTemp.length == 2) {
      LatLng point = new LatLng(locationTemp[1], locationTemp[0]);
      MarkerOptions overlayOptions = new MarkerOptions()
          .position(point)
          .icon(pic)
          .animateType(MarkerOptions.MarkerAnimateType.grow);//设置marker从地上生长出来的动画
      Marker marker = (Marker) baiduMap.addOverlay(overlayOptions);
      Bundle bundle = new Bundle();
      bundle.putSerializable(ConstantValues.User.GEO_USER_ENTITY, geoUserEntityTemp);
      marker.setExtraInfo(bundle);//marker点击事件监听时，可以获取到此时设置的数据
      marker.setToTop();
    }
  }
  
  private void returnPicView(String urlTemp, final ResultListener resultListener) {
    viewHolder = (ViewHolder) markerView.getTag();
    Glide.with(getContext())
        .load(urlTemp)
        .asBitmap()
        .transform(new GlideCircleTransform(getContext()))
        .into(new SimpleTarget() {
             @Override
             public void onResourceReady(Bitmap bitmap, GlideAnimation glideAnimation) {
               viewHolder.imageView.setImageBitmap(bitmap);
               resultListener.onReturnResult(markerView);
             }
           }
        );
  }

public class GlideCircleTransform extends BitmapTransformation {
  public Context context;
  public GlideCircleTransform(Context context) {
    super(context);
    this.context = context;
  }
  @Override
  protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
    return circleCrop(pool, toTransform);
  }
  private static Bitmap circleCrop(BitmapPool pool, Bitmap source) {
    if (source == null) return null;
    int size = Math.min(source.getWidth(), source.getHeight());
    int x = (source.getWidth() - size) / 2;
    int y = (source.getHeight() - size) / 2;
    // TODO this could be acquired from the pool too
    Bitmap squared = Bitmap.createBitmap(source, x, y, size, size);
    Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888);
    if (result == null) {
      result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
    }
    Canvas canvas = new Canvas(result);
    Paint paint = new Paint();
    paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
    paint.setAntiAlias(true);
    float r = size / 2f;
    canvas.drawCircle(r, r, r, paint);
    return result;
  }
  @Override
  public String getId() {
    return getClass().getName();
  }
}