详解Android之图片加载框架Fresco基本使用(二)

class CustomProgressBar extends Drawable{

 @Override
 protected boolean onLevelChange(int level) {
  //doSomething
  return super.onLevelChange(level);
 }

}

GenericDraweeHierarchyBuilder progressHierarchyBuilder = new GenericDraweeHierarchyBuilder(getResources());
GenericDraweeHierarchy progressHierarchy = progressHierarchyBuilder
    .setProgressBarImage(new ProgressBarDrawable(), ScalingUtils.ScaleType.CENTER_INSIDE)
    .build();
progressImageDraweeView.setHierarchy(progressHierarchy);

@Override
public void onLoadingComplete(String s, View view, Bitmap bitmap) {
 float bitmapWidth = bitmap.getWidth();
 float bitmapHeight = bitmap.getHeight();
 Scale[o] = (params[o].height / bitmapHeight >= params[o].width / bitmapWidth) ? params[o].height / bitmapHeight : params[o].width / bitmapWidth;
 float scaleBitmapWidth = Scale[o] * bitmapWidth;
 float scaleBitmapHeight = Scale[o] * bitmapHeight;
 Matrix matrix = new Matrix();
 matrix.postScale(Scale[o], Scale[o]);
 if (scaleBitmapWidth > scaleBitmapHeight) { //宽度图
  if (imagedata.get(o).getFace_center_x() == 0 && imagedata.get(o).getFace_center_y() == 0) {
   if(scaleBitmapWidth - params[o].width < 0.5 * scaleBitmapWidth - params[o].width / 2){
    matrix.postTranslate( params[o].width - scaleBitmapWidth ,0);
   }else{
    matrix.postTranslate(-(0.5f * scaleBitmapWidth - params[o].width / 2), 0);
   }
  } else {
   if(scaleBitmapWidth - params[o].width < scaleBitmapWidth * imagedata.get(o).getFace_center_x() - params[o].width / 2) {
    matrix.postTranslate(params[o].width - scaleBitmapWidth, 0);
   } else {
    if (scaleBitmapWidth * imagedata.get(o).getFace_center_x() - params[o].width / 2 < 0) {
     matrix.postTranslate(0, 0);
    } else {
     matrix.postTranslate(-(scaleBitmapWidth * imagedata.get(o).getFace_center_x() - params[o].width / 2), 0);
    }
   }
  }
 } else { //高度图
  if (imagedata.get(o).getFace_center_x() == 0 && imagedata.get(o).getFace_center_y() == 0) {
   if(scaleBitmapHeight - params[o].height < 0.5 * scaleBitmapHeight - params[o].height / 2){
    matrix.postTranslate(0, params[o].height - scaleBitmapHeight);
   }else{
    matrix.postTranslate(0,-(0.5f * scaleBitmapHeight - params[o].height / 2));
   }
  } else {
   if (scaleBitmapHeight - params[o].height < scaleBitmapHeight * imagedata.get(o).getFace_center_y() - params[o].height / 2) {
    matrix.postTranslate(0, params[o].height - scaleBitmapHeight);
   } else {
    if (scaleBitmapHeight * imagedata.get(o).getFace_center_y() - params[o].height / 2 < 0) {
     matrix.postTranslate(0, 0);
    } else {
     matrix.postTranslate(0, -(scaleBitmapHeight * imagedata.get(o).getFace_center_y() - params[o].height / 2));
    }
   }
  }
 }
 vh.image[o].setImageMatrix(matrix);
}         

fresco:actualImageScaleType="focusCrop"

PointF focusPoint;
// your app populates the focus point
mSimpleDraweeView
 .getHierarchy()
 .setActualImageFocusPoint(focusPoint);

public static abstract class AbstractScaleType implements ScaleType {
 @Override
 public Matrix getTransform(Matrix outTransform, Rect parentRect, int childWidth, int childHeight, float focusX, float focusY) {
  // 取宽度和高度需要缩放的倍数中最小的一个
  final float sX = (float) parentRect.width() / (float) childWidth;
  final float sY = (float) parentRect.height() / (float) childHeight;
  float scale = Math.min(scaleX, scaleY);
  
  // 计算为了均分空白区域，需要偏移的x、y方向的距离
  float dx = parentRect.left + (parentRect.width() - childWidth * scale) * 0.5f;
  float dy = parentRect.top + (parentRect.height() - childHeight * scale) * 0.5f;
  
  // 最后我们应用它
  outTransform.setScale(scale, scale);
  outTransform.postTranslate((int) (dx + 0.5f), (int) (dy + 0.5f));
  return outTransform;
 }
}

 ControllerListener controllerListener = new BaseControllerListener(){

  @Override
  public void onFinalImageSet(String id, Object imageInfo, Animatable animatable) {
   if(animatable!=null){
    animatable.start();
   }
  }

  @Override
  public void onFailure(String id, Throwable throwable) {
   Toast.makeText(context,"图片加载失败",Toast.LENGTH_SHORT).show();
  }

 };

 DraweeController gifController = Fresco.newDraweeControllerBuilder()
    .setUri(Uri.parse("http://img.huofar.com/data/jiankangrenwu/shizi.gif"))
    .setOldController(gifImageView.getController())
    .setControllerListener(controllerListener)
    .build();
 gifImageView.setController(gifController);

 Postprocessor redMeshPostProcessor = new BasePostprocessor() {
  @Override
  public void process(Bitmap bitmap) {
   for (int x = 0; x < bitmap.getWidth(); x+=2) {
    for (int y = 0; y < bitmap.getHeight(); y+=2) {
     bitmap.setPixel(x, y, Color.TRANSPARENT);
    }
   }
  }

  @Override
  public String getName() {
   return super.getName();
  }
 };
 ImageRequest processorImageRequest = ImageRequestBuilder
   .newBuilderWithSource(Uri.parse("http://avatar.csdn.net/4/E/8/1_y1scp.jpg"))
   .setPostprocessor(redMeshPostProcessor)
   .build();
 DraweeController processorController = Fresco.newDraweeControllerBuilder()
   .setImageRequest(processorImageRequest)
   .setOldController(processImageView.getController())
   .build();
 processImageView.setController(processorController);

  /**
   * 设置渐进式JPEG Config
   * */
  ProgressiveJpegConfig config = new ProgressiveJpegConfig() {
   @Override
   public int getNextScanNumberToDecode(int scanNumber) {
    return 0;
   }

   @Override
   public QualityInfo getQualityInfo(int scanNumber) {
    return null;
   }
  };
  /**
   * 直接控制ImagePipeline Config
   * */
  ImagePipelineConfig imagePipelineConfig = ImagePipelineConfig.newBuilder(context)
    .setProgressiveJpegConfig(config)
    .setDownsampleEnabled(true)
    .build();
  /**
   * 初始化使得Fresco支持渐进式JPEG的加载
   * */
  Fresco.initialize(this,imagePipelineConfig);

ImageRequest request = ImageRequestBuilder.newBuilderWithSource(Uri.parse("http://pooyak.com/p/progjpeg/jpegload.cgi"))
  .setProgressiveRenderingEnabled(true) //设置支持渐进式JPEG
  .build();
DraweeController progressiveJPEGController = Fresco.newDraweeControllerBuilder()
  .setImageRequest(request)
  .setOldController(progressiveJpegImageView.getController())
  .build();
progressiveJpegImageView.setController(progressiveJPEGController);

DraweeController gifController = Fresco.newDraweeControllerBuilder()
    .setUri(Uri.parse("http://img.huofar.com/data/jiankangrenwu/shizi.gif"))
    .setAutoPlayAnimations(true) //使动画自动播放
    .setOldController(gifImageView.getController())
    .build();
gifImageView.setController(gifController);

Animatable animatable = mSimpleDraweeView.getController().getAnimatable();
if (animatable != null) {
 animatable.start();
 // later
 animatable.stop();
}