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我想通過DataSubscriber通過Fresco.G獲取gif,但是當我得到CloseableAnimatedImage時,我不知道如何獲取它的位圖。使用DataSubscriber加載gif的壁畫
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
}
}
}
}
,我試過另一種方式來獲得一個PIC的位圖:
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()
}
}
這是科特林碼,我用fetchEncodedImage並獲得PIC的InputStream的事。 但它總是繼續onFailImpl(),我不知道爲什麼。
動畫圖像有幾個幀,而不僅僅是一個位圖。此外,這些幀會根據需要動態解碼。你想用這些位圖做什麼? – plamenko
@plamenko我想要獲得gif的第一幀並展示它。 –
爲什麼你不使用SimpleDraweeView? – plamenko