android - 尝试使用 Fresco 从 uri 获取位图

Question

当我使用 ImagePipeline 使用 Fresco 获取 Bitmap 时，不理解行为。当我调试我的代码时，它正在执行 onNewResultImpl 或 onFailureImpl 并且当我运行应用程序时它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)。我看过这个SO Question and take ref from it 还有from Fresco's doc.

@Override
protected 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 ","after callback");
                                    Toast.makeText(CommentActivity.this,"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 中获取位图，而不是从任何动画 gif 图像中获取位图

Answer 1

我删除了 try 和 finally block ，并关闭了 onNewResultImpl 和 onFailureImpl 中的 Datasource

代码 fragment

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());