android - 尝试使用 Fresco 从 uri 获取位图

Question

在我Bitmap使用Frescousing获取时不理解该行为ImagePipeline。当我调试我的代码时，它正在执行onNewResultImpl，或者onFailureImpl当我运行应用程序时，应用程序不工作意味着它没有被调用onFailureImpl，或者onNewResultImpl（我正在使用Toast并Log在运行应用程序时检查它）。我已经看到了这个SO Question 并从中获取参考，也从Fresco's文档中获取。

@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 图像而不是任何动画 gif图像中获取位图

Answer 1

我已经移除try并finally阻塞并关闭Datasource内部onNewResultImpl和onFailureImpl

代码片段

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());