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我想通过DataSubscriber通过Fresco.G获取gif,但是当我得到CloseableAnimatedImage时,我不知道如何获取它的位图。使用DataSubscriber加载gif的壁画
public void getBitmap(String url, final OnBitmapFetchedListener listener) {
ImageRequest request = ImageRequest.fromUri(Uri.parse(url));
final ImagePipeline imagePipeline = Fresco.getImagePipeline();
DataSource<CloseableReference<CloseableImage>>
dataSource = imagePipeline.fetchDecodedImage(request, null);
DataSubscriber dataSubscriber = new BaseDataSubscriber<CloseableReference<CloseableImage>>() {
@Override
protected void onNewResultImpl(DataSource<CloseableReference<CloseableImage>> closeableReferenceDataSource) {
CloseableReference<CloseableImage> imageReference = closeableReferenceDataSource.getResult();
if (imageReference != null) {
try {
CloseableImage image = imageReference.clone().get();
if (image instanceof CloseableAnimatedImage) {
//here i get the gif but i don't know how to get the bitmap
}
}
}
}
,我试过另一种方式来获得一个PIC的位图:
fun getBitmap(uri: Uri, listener: OnBitmapFetchedListener) {
val request = ImageRequest.fromUri(uri)
val imagePipeline = Fresco.getImagePipeline()
val dataSource = imagePipeline.fetchEncodedImage(request, null)
val dataSubscriber = object : BaseDataSubscriber<CloseableReference<PooledByteBuffer>>() {
override fun onNewResultImpl(closeableReferenceDataSource: DataSource<CloseableReference<PooledByteBuffer>>) {
val imageReference = closeableReferenceDataSource.result
if (imageReference != null) {
try {
val image = imageReference.clone().get()
val inputStream = PooledByteBufferInputStream(image)
val imageFormat = ImageFormatChecker.getImageFormat(inputStream)
Log.e("ImageUtil", "imageFormat = ${ImageFormat.getFileExtension(imageFormat)}")
val bitmap = BitmapFactory.decodeStream(inputStream)
listener.onSuccess(bitmap)
} catch (e: IOException) {
Log.e("ImageUtil", "error:$e")
} finally {
imageReference.close()
}
}
}
override fun onFailureImpl(closeableReferenceDataSource: DataSource<CloseableReference<PooledByteBuffer>>) {
Log.e("ImageUtil", "fail")
listener.onFail()
}
}
这是科特林码,我用fetchEncodedImage并获得PIC的InputStream的事。 但它总是继续onFailImpl(),我不知道为什么。
动画图像有几个帧,而不仅仅是一个位图。此外,这些帧会根据需要动态解码。你想用这些位图做什么? – plamenko
@plamenko我想要获得gif的第一帧并展示它。 –
为什么你不使用SimpleDraweeView? – plamenko