Java ImageRequest.RequestLevel方法代码示例

import com.facebook.imagepipeline.request.ImageRequest; //导入方法依赖的package包/类
public SettableProducerContext(
    ImageRequest imageRequest,
    String id,
    ProducerListener producerListener,
    Object callerContext,
    ImageRequest.RequestLevel lowestPermittedRequestLevel,
    boolean isPrefetch,
    boolean isIntermediateResultExpected,
    Priority priority) {
  super(
      imageRequest,
      id,
      producerListener,
      callerContext,
      lowestPermittedRequestLevel,
      isPrefetch,
      isIntermediateResultExpected,
      priority);
}
 

import com.facebook.imagepipeline.request.ImageRequest; //导入方法依赖的package包/类
public BaseProducerContext(
    ImageRequest imageRequest,
    String id,
    ProducerListener producerListener,
    Object callerContext,
    ImageRequest.RequestLevel lowestPermittedRequestLevel,
    boolean isPrefetch,
    boolean isIntermediateResultExpected,
    Priority priority) {
  mImageRequest = imageRequest;
  mId = id;
  mProducerListener = producerListener;
  mCallerContext = callerContext;
  mLowestPermittedRequestLevel = lowestPermittedRequestLevel;

  mIsPrefetch = isPrefetch;
  mPriority = priority;
  mIsIntermediateResultExpected = isIntermediateResultExpected;

  mIsCancelled = false;
  mCallbacks = new ArrayList<>();
}
 

import com.facebook.imagepipeline.request.ImageRequest; //导入方法依赖的package包/类
/**
 * Returns a DataSource supplier that will on get submit the request for execution and return a
 * DataSource representing the pending results of the task.
 *
 * @param imageRequest the request to submit (what to execute).
 * @param callerContext the caller context of the caller of data source supplier
 * @param requestLevel which level to look down until for the image
 * @return a DataSource representing pending results and completion of the request
 */
public Supplier<DataSource<CloseableReference<CloseableImage>>> getDataSourceSupplier(
    final ImageRequest imageRequest,
    final Object callerContext,
    final ImageRequest.RequestLevel requestLevel) {
  return new Supplier<DataSource<CloseableReference<CloseableImage>>>() {
    @Override
    public DataSource<CloseableReference<CloseableImage>> get() {
      return fetchDecodedImage(imageRequest, callerContext, requestLevel);
    }

    @Override
    public String toString() {
      return Objects.toStringHelper(this)
          .add("uri", imageRequest.getSourceUri())
          .toString();
    }
  };
}
 

import com.facebook.imagepipeline.request.ImageRequest; //导入方法依赖的package包/类
/**
 * Submits a request for execution and returns a DataSource representing the pending decoded
 * image(s).
 * <p>The returned DataSource must be closed once the client has finished with it.
 *
 * @param imageRequest the request to submit
 * @param callerContext the caller context for image request
 * @param lowestPermittedRequestLevelOnSubmit the lowest request level permitted for image request
 * @return a DataSource representing the pending decoded image(s)
 */
public DataSource<CloseableReference<CloseableImage>> fetchDecodedImage(
    ImageRequest imageRequest,
    Object callerContext,
    ImageRequest.RequestLevel lowestPermittedRequestLevelOnSubmit) {
  try {
    Producer<CloseableReference<CloseableImage>> producerSequence =
        mProducerSequenceFactory.getDecodedImageProducerSequence(imageRequest);
    return submitFetchRequest(
        producerSequence,
        imageRequest,
        lowestPermittedRequestLevelOnSubmit,
        callerContext);
  } catch (Exception exception) {
    return DataSources.immediateFailedDataSource(exception);
  }
}
 

import com.facebook.imagepipeline.request.ImageRequest; //导入方法依赖的package包/类
private void loadThumb(
    SimpleDraweeView draweeView,
    Size size,
    ImageRequest.RequestLevel requestLevel) {
  ImageRequest request = ImageRequestBuilder.newBuilderWithSource(size.uri)
      .setMediaVariations(MediaVariations.newBuilderForMediaId(MEDIA_ID)
          .setForceRequestForSpecifiedUri(true)
          .build())
      .setLowestPermittedRequestLevel(requestLevel)
      .setResizeOptions(new ResizeOptions(draweeView.getWidth(), draweeView.getHeight()))
      .setCacheChoice(size.cacheChoice)
      .build();
  DraweeController controller = Fresco.newDraweeControllerBuilder()
      .setImageRequest(request)
      .setOldController(draweeView.getController())
      .build();
  draweeView.setController(controller);
}
 

import com.facebook.imagepipeline.request.ImageRequest; //导入方法依赖的package包/类
public static ImageRequest.RequestLevel convertCacheLevelToRequestLevel(
    AbstractDraweeControllerBuilder.CacheLevel cacheLevel) {
  switch (cacheLevel) {
    case FULL_FETCH:
      return ImageRequest.RequestLevel.FULL_FETCH;
    case DISK_CACHE:
      return ImageRequest.RequestLevel.DISK_CACHE;
    case BITMAP_MEMORY_CACHE:
      return ImageRequest.RequestLevel.BITMAP_MEMORY_CACHE;
    default:
      throw new RuntimeException("Cache level" + cacheLevel + "is not supported. ");
  }
}
 

import com.facebook.imagepipeline.request.ImageRequest; //导入方法依赖的package包/类
protected Pair<CacheKey, ImageRequest.RequestLevel> getKey(ProducerContext producerContext) {
  return Pair.create(
      mCacheKeyFactory.getEncodedCacheKey(
          producerContext.getImageRequest(),
          producerContext.getCallerContext()),
      producerContext.getLowestPermittedRequestLevel());
}
 

import com.facebook.imagepipeline.request.ImageRequest; //导入方法依赖的package包/类
protected Pair<CacheKey, ImageRequest.RequestLevel> getKey(
    ProducerContext producerContext) {
  return Pair.create(
      mCacheKeyFactory.getBitmapCacheKey(
          producerContext.getImageRequest(),
          producerContext.getCallerContext()),
      producerContext.getLowestPermittedRequestLevel());
}
 

import com.facebook.imagepipeline.request.ImageRequest; //导入方法依赖的package包/类
private <T> DataSource<CloseableReference<T>> submitFetchRequest(
    Producer<CloseableReference<T>> producerSequence,
    ImageRequest imageRequest,
    ImageRequest.RequestLevel lowestPermittedRequestLevelOnSubmit,
    Object callerContext) {
  final RequestListener requestListener = getRequestListenerForRequest(imageRequest);

  try {
    ImageRequest.RequestLevel lowestPermittedRequestLevel =
        ImageRequest.RequestLevel.getMax(
            imageRequest.getLowestPermittedRequestLevel(),
            lowestPermittedRequestLevelOnSubmit);
    SettableProducerContext settableProducerContext = new SettableProducerContext(
        imageRequest,
        generateUniqueFutureId(),
        requestListener,
        callerContext,
        lowestPermittedRequestLevel,
      /* isPrefetch */ false,
        imageRequest.getProgressiveRenderingEnabled() ||
            imageRequest.getMediaVariations() != null ||
            !UriUtil.isNetworkUri(imageRequest.getSourceUri()),
        imageRequest.getPriority());
    return CloseableProducerToDataSourceAdapter.create(
        producerSequence,
        settableProducerContext,
        requestListener);
  } catch (Exception exception) {
    return DataSources.immediateFailedDataSource(exception);
  }
}
 

import com.facebook.imagepipeline.request.ImageRequest; //导入方法依赖的package包/类
private DataSource<Void> submitPrefetchRequest(
    Producer<Void> producerSequence,
    ImageRequest imageRequest,
    ImageRequest.RequestLevel lowestPermittedRequestLevelOnSubmit,
    Object callerContext,
    Priority priority) {
  final RequestListener requestListener = getRequestListenerForRequest(imageRequest);

  try {
    ImageRequest.RequestLevel lowestPermittedRequestLevel =
        ImageRequest.RequestLevel.getMax(
            imageRequest.getLowestPermittedRequestLevel(),
            lowestPermittedRequestLevelOnSubmit);
    SettableProducerContext settableProducerContext = new SettableProducerContext(
        imageRequest,
        generateUniqueFutureId(),
        requestListener,
        callerContext,
        lowestPermittedRequestLevel,
      /* isPrefetch */ true,
      /* isIntermediateResultExpected */ false,
        priority);
    return ProducerToDataSourceAdapter.create(
        producerSequence,
        settableProducerContext,
        requestListener);
  } catch (Exception exception) {
    return DataSources.immediateFailedDataSource(exception);
  }
}
 

import com.facebook.imagepipeline.request.ImageRequest; //导入方法依赖的package包/类
@Override
public ImageRequest.RequestLevel getLowestPermittedRequestLevel() {
  return mLowestPermittedRequestLevel;
}
 

import com.facebook.imagepipeline.request.ImageRequest; //导入方法依赖的package包/类
/**
 * @return the lowest permitted {@link ImageRequest.RequestLevel}
 */
ImageRequest.RequestLevel getLowestPermittedRequestLevel();