android – 尝试使用Fresco从uri获取位图

概述当我使用Fresco使用 ImagePipeline获取Bitmap时,不明白行为.当我调试我的代码时,它正在执行onNewResultImpl或onFailureImpl,当我运行应用程序不工作意味着它没有被调用onFailureImpl或onNewResultImpl(我在运行应用程序时使用Toast和Log检查它).我见过这个 SO Question and take ref from it 当我使用Fresco使用 ImagePipeline获取Bitmap时,不明白行为.当我调试我的代码时,它正在执行onNewResultImpl或onFailureImpl,当我运行应用程序不工作意味着它没有被调用onFailureImpl或onNewResultImpl(我在运行应用程序时使用Toast和Log检查它).我见过这个 SO Question and take ref from it 和 from Fresco's doc.

@OverrIDeprotected voID onActivityResult(int requestCode,int resultCode,Intent data) {    super.onActivityResult(requestCode,resultCode,data);    if (resultCode == Activity.RESulT_OK) {        switch (requestCode) {            case ACTION_OPEN_galLERY:                mImageCaptureUri = data.getData();                if (mImageCaptureUri != null) {                    commentimgVIEw.setimageURI(mImageCaptureUri);//mImageCaptureUri is working fine                    try {                        imageRequest = ImageRequestBuilder                                .newBuilderWithSource(mImageCaptureUri)                                .setRequestPriority(Priority.HIGH)                                .setLowestPermittedRequestLevel(ImageRequest.RequestLevel.FulL_FETCH)                                .build();                        dataSource = imagePipeline.fetchDecodedImage(imageRequest,CommentActivity.this);                        dataSource.subscribe(new BaseBitmapDataSubscriber() {                            @OverrIDe                            protected voID onNewResultImpl(@Nullable Bitmap bitmap) {                                if (bitmap != null) {                                    bmp = Bitmap.createBitmap(bitmap);                                    Log.d("Bitmap ","after callback");                                    Toast.makeText(CommentActivity.this,"has bitmap",Toast.LENGTH_SHORT).show();                                } else {                                    Log.d("Bitmap is null ","bitmap is null",Toast.LENGTH_SHORT).show();                                }                            }                            @OverrIDe                            protected voID onFailureImpl(DataSource<CloseableReference<CloseableImage>> dataSource) {                                Log.d("Bitmap ","after callback failure");                                Toast.makeText(CommentActivity.this,"Failure",Toast.LENGTH_SHORT).show();                            }                        },CallerThreadExecutor.getInstance());                    } catch (Exception e){                        e.printstacktrace();                    } finally {                        if (dataSource != null) {                            dataSource.close();                        }                    }                }        }    }}

注意：我试图从jpg图像获取位图,而不是从任何动画gif图像

解决方法 我已经删除了try并最终阻止并关闭了onNewResultImpl和onFailureImpl中的Datasource

代码段

ImageRequest imageRequest = ImageRequestBuilder                            .newBuilderWithSource(mImageCaptureUri)                            .setautoRotateEnabled(true)                            .build();ImagePipeline imagePipeline = Fresco.getimagePipeline();final DataSource<CloseableReference<CloseableImage>>                            dataSource = imagePipeline.fetchDecodedImage(imageRequest,this);dataSource.subscribe(new BaseBitmapDataSubscriber() {      @OverrIDe      public voID onNewResultImpl(@Nullable Bitmap bitmap) {         if (dataSource.isFinished() && bitmap != null){                  Log.d("Bitmap","has come");                  bmp = Bitmap.createBitmap(bitmap);                  dataSource.close();         }     }     @OverrIDe     public voID onFailureImpl(DataSource dataSource) {        if (dataSource != null) {                dataSource.close();        }     } },CallerThreadExecutor.getInstance());

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