分享Fresco缓存中的图片

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我是靠谱客的博主热心奇异果，这篇文章主要介绍分享Fresco缓存中的图片，现在分享给大家，希望可以做个参考。

由于使用Fresco框架加载网络图片，然后又面临要分享图片的需求，于是研究了下如何使用分享fresco缓存下的图片。

已经确定缓存中有的图片：

先说思路，本来是想直接分享缓存路径中的图片缓存的，但是Fresco缓存的格式是.cnt，不能直接分享，于是通过fresco本身自带的功能获取到图片的bitmap，在将bitmap存到SD卡上，再按照sd卡上的路径进行分享。
具体实现如下：

复制代码

//从缓存中获取图片的bitmap
     ImageRequest imageRequest=ImageRequestBuilder.newBuilderWithSource(Uri.parse(url))
                .setResizeOptions(resizeOptions)
                .setAutoRotateEnabled(true)
                .build();
        ImagePipeline imagePipeline = Fresco.getImagePipeline();
        DataSource<CloseableReference<CloseableImage>> dataSource = imagePipeline.fetchDecodedImage(imageRequest, this);
        CloseableReference<CloseableImage> imageCloseableReference =  dataSource.getResult();
        final String sdPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/share"+"/"+photoFiles.get(position).getName();
        if (imageCloseableReference != null) {
            final CloseableImage image = imageCloseableReference.get();
            if (image != null && image instanceof CloseableStaticBitmap) {
                CloseableStaticBitmap closeableStaticBitmap = (CloseableStaticBitmap) image;
                Bitmap bitmap = closeableStaticBitmap.getUnderlyingBitmap();
                if (bitmap != null) {

//把获取的Bitmap转存到SD卡上
                    File docment = new File(sdPath);
                    try {
                        FileOutputStream fos = new FileOutputStream(docment);
                        bitmap.compress(Bitmap.CompressFormat.JPEG,90,fos);
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    }
                    File f = new File(sdPath);
                    Uri imagePath = Uri.fromFile(f);
                    //把SD卡路径上的图片分享出去
                    Intent shareIntent = new Intent();
                    shareIntent.setAction(Intent.ACTION_SEND);
                    shareIntent.putExtra(Intent.EXTRA_STREAM, imagePath);
                    shareIntent.setType("image/*");
                    startActivity(Intent.createChooser(shareIntent, "分享到"));
                    mContext.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, imagePath));
                }
            }
        }

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//从缓存中获取图片的bitmap
     ImageRequest imageRequest=ImageRequestBuilder.newBuilderWithSource(Uri.parse(url))
                .setResizeOptions(resizeOptions)
                .setAutoRotateEnabled(true)
                .build();
        ImagePipeline imagePipeline = Fresco.getImagePipeline();
        DataSource<CloseableReference<CloseableImage>> dataSource = imagePipeline.fetchDecodedImage(imageRequest, this);
        CloseableReference<CloseableImage> imageCloseableReference =  dataSource.getResult();
        final String sdPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/share"+"/"+photoFiles.get(position).getName();
        if (imageCloseableReference != null) {
            final CloseableImage image = imageCloseableReference.get();
            if (image != null && image instanceof CloseableStaticBitmap) {
                CloseableStaticBitmap closeableStaticBitmap = (CloseableStaticBitmap) image;
                Bitmap bitmap = closeableStaticBitmap.getUnderlyingBitmap();
                if (bitmap != null) {

            //把获取的Bitmap转存到SD卡上
                    File docment = new File(sdPath);
                    try {
                        FileOutputStream fos = new FileOutputStream(docment);
                        bitmap.compress(Bitmap.CompressFormat.JPEG,90,fos);
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    }
                    File f = new File(sdPath);
                    Uri imagePath = Uri.fromFile(f);
                    //把SD卡路径上的图片分享出去
                    Intent shareIntent = new Intent();
                    shareIntent.setAction(Intent.ACTION_SEND);
                    shareIntent.putExtra(Intent.EXTRA_STREAM, imagePath);
                    shareIntent.setType("image/*");
                    startActivity(Intent.createChooser(shareIntent, "分享到"));
                    mContext.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, imagePath));
                }
            }
        }

这样就可以在Fresco的基础上分享图片了。
如果你不确定你的缓存中是否存在这张图片，那么可以使用下面的代码，在图片获取到了之后在进行分享

复制代码

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       DraweeController controller = Fresco.newDraweeControllerBuilder()
                .setControllerListener(new BaseControllerListener<ImageInfo>(){
                    @Override
                    public void onFinalImageSet(String id, ImageInfo imageInfo, Animatable animatable) {
                        super.onFinalImageSet(id, imageInfo, animatable);
                       //1:获取bitmap
                       //2：存sd卡
                       //3：分享sd的图片
                    }
                })
                .build();
     frescoView.setController(controller);