Created
August 15, 2018 07:34
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采用未解码的方式去获取Bitmap
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| /** | |
| * Author: jzu | |
| * Date: 2018/8/15 | |
| * Function: Fresco操作图片的工具类 | |
| */ | |
| object FrescoUtil { | |
| /** | |
| * scaleSize : 缩放倍数 | |
| */ | |
| fun loadImage(uri: Uri,scaleSize : Int,callback: Callback) { | |
| val request = ImageRequest.fromUri(uri) | |
| val localCache = getCacheFile(uri.toString()) | |
| if (localCache == null) { | |
| val options = BitmapFactory.Options() | |
| options.inSampleSize = scaleSize | |
| val bitmap = BitmapFactory.decodeFile(localCache.toString(),options) | |
| callback.onSuccess(bitmap) | |
| } else { | |
| val pipeline = Fresco.getImagePipeline() | |
| val dataSource = pipeline.fetchEncodedImage(request, true) | |
| dataSource.subscribe(object : BaseDataSubscriber<CloseableReference<PooledByteBuffer>>() { | |
| override fun onFailureImpl(dataSource: DataSource<CloseableReference<PooledByteBuffer>>?) { | |
| callback.onFail() | |
| } | |
| override fun onNewResultImpl(dataSource: DataSource<CloseableReference<PooledByteBuffer>>?) { | |
| if (dataSource == null){ | |
| return | |
| } | |
| if (!dataSource.isFinished) { | |
| return | |
| } | |
| if (dataSource.result == null){ | |
| return | |
| } | |
| val inputStream = PooledByteBufferInputStream(dataSource.result!!.get()); | |
| try { | |
| val options = BitmapFactory.Options() | |
| options.inSampleSize = scaleSize | |
| val bitmap = BitmapFactory.decodeStream(inputStream,null,options) | |
| ThreadUtil.postOnUI(Runnable { | |
| callback.onSuccess(bitmap) | |
| }) | |
| } finally { | |
| Closeables.closeQuietly(inputStream) | |
| } | |
| } | |
| }, CallerThreadExecutor.getInstance()) | |
| } | |
| } | |
| /** | |
| * 获取本地缓存文件，如果没有则返回空 | |
| * | |
| * @param path | |
| * @return | |
| */ | |
| fun getCacheFile(path: String): File? { | |
| var cacheFile: File? = null | |
| val mainFileCache = ImagePipelineFactory | |
| .getInstance() | |
| .mainFileCache | |
| val simpleCacheKey = SimpleCacheKey(path) | |
| if (mainFileCache.hasKey(simpleCacheKey)) { | |
| val resource = mainFileCache.getResource(simpleCacheKey) as FileBinaryResource | |
| if (resource != null) { | |
| cacheFile = resource.file | |
| } | |
| } | |
| return cacheFile | |
| } | |
| interface Callback{ | |
| fun onSuccess(bitmap : Bitmap) | |
| fun onFail() | |
| } | |
| } |
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