我如何使用毕加索向Marker添加图标？ [英] How can I use Picasso to add icon to Marker?

问题描述

我想使用毕加索检索位图图像作为标记图标使用，但我不确定如何执行此操作。如果我使用毕加索将图像插入图像视图，我知道我可以使用：

  Picasso.with（MainActivity。此）.load（URL）.into（photo_imageview）; 
  

当然，如果我将它传递给 .icon（）

有没有一种简单的方法可以实现这一目标？

看看这个！

解决方案

毕加索提供了一个通用的 Target 界面，您可以使用它来实现自己的图像目的地。具体来说，您需要覆盖 onBitmapLoaded 来填充标记。

下面给出了一个基本的实现。

 公共类PicassoMarker实现了Target {
 Marker mMarker; 
 
 PicassoMarker（标记标记）{
 mMarker = marker; 
 
 
 @Override 
 public int hashCode（）{
 return mMarker.hashCode（）; 
 
 $ b @Override 
 public boolean equals（Object o）{
 if（o instanceof PicassoMarker）{
 Marker marker =（（PicassoMarker）o ）.mMarker; 
 return mMarker.equals（marker）; 
} else {
 return false; 
} 
} 
 
 @Override 
 public void onBitmapLoaded（位图位图，Picasso.LoadedFrom from）{
 mMarker.setIcon（BitmapDescriptorFactory.fromBitmap（bitmap ））; 
 
 $ b @Override 
 public void onBitmapFailed（Drawable errorDrawable）{
} 
 $ b $ @Override 
 public void onPrepareLoad（ Drawable placeHolderDrawable）{
 
} 
} 
  

您可以使用它像这样 -

  marker = new PicassoMarker（myMarker）; 
 Picasso.with（MainActivity.this）.load（URL）.into（marker）; 
  

注意毕加索仅持有一周参考目标传递给到。因此，在加载图像之前，标记引用需要存在，以避免垃圾回收器清理回调。

I would like to use Picasso to retrieve the Bitmap image to use as a marker icon but I am not sure how to do so. If I am using Picasso to insert an image into an image view, I know I can use:

 Picasso.with(MainActivity.this).load(URL).into(photo_imageview);

Of course this will not work if I pass it to .icon()

Is there a simple way to achieve this?

Thanks to anyone taking a look at this!

解决方案

Picasso provides a generic Target interface you can use to implement your own image destination. Specifically, you will want to override onBitmapLoaded to populate your marker.

A basic implementation is given below.

public class PicassoMarker implements Target {
    Marker mMarker;

    PicassoMarker(Marker marker) {
        mMarker = marker;
    }

    @Override
    public int hashCode() {
        return mMarker.hashCode();
    }

    @Override
    public boolean equals(Object o) {
        if(o instanceof PicassoMarker) {
            Marker marker = ((PicassoMarker) o).mMarker;
            return mMarker.equals(marker);
        } else {
            return false;
        }
    }

    @Override
    public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
        mMarker.setIcon(BitmapDescriptorFactory.fromBitmap(bitmap));
    }

    @Override
    public void onBitmapFailed(Drawable errorDrawable) {
    }

    @Override
    public void onPrepareLoad(Drawable placeHolderDrawable) {

    }
}

You would use it like this --

marker = new PicassoMarker(myMarker);
Picasso.with(MainActivity.this).load(URL).into(marker);

Note Picasso only holds a week reference to the Target passed to into. Therefore, the marker reference needs to exist until the image is loaded to avoid have the callbacks being cleaned up by the garbage collector.

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