android - SimpleDraweeView 在 fresco 中缩放图像后不调整大小

Question

我正在使用 fresco 在 ListView 中显示图像。但是我有一个问题。

当我使用像 CENTER_CROP 这样保持宽高比的方法缩放我的图像时，缩放后的图像高度变得小于我的 simpledraweeview 的高度，simple-Drawee-View 不会自动调整大小以匹配缩放图像的大小。

• 我尝试过使用 android:adjustViewBounds = true 但它不起作用。

• 我也试过下面的方法，但是 scaleY 我想用来计算缩放高度 返回 1 即使图像高度小于 simpe-drawee - View 的高度

  float[] f = new float[9]
  draweeView.getImageMatrix().getValues(f);
  float scaleY = f[Matrix.MSCALE_Y];
  Log.d("App","scale y is "+ scaleY);
  

上面的codlet在下面的方法中使用

private void loadImage(Uri fileUri,final SimpleDraweeView draweeView,int myImageHeight){

    draweeView.getLayoutParams().width = displayWidth;

    int selectedSize = (myImageHeight > displayWidth)? displayWidth : myImageHeight;

    draweeView.getLayoutParams().height= selectedSize;


    GenericDraweeHierarchyBuilder builder = new GenericDraweeHierarchyBuilder(context.getResources());

    GenericDraweeHierarchy hierarchy = builder
            .setProgressBarImage(new CircleProgressBarDrawable())
            .setActualImageScaleType(ScalingUtils.ScaleType.CENTER_CROP)
            .build();


    ImageRequest requestBuilder = ImageRequestBuilder.newBuilderWithSource(fileUri)
            .setProgressiveRenderingEnabled(true)
            .build();

    //ImagePipeline imagePipeline = Fresco.getImagePipeline();

    DraweeController controller = Fresco.newDraweeControllerBuilder()
            .setOldController(draweeView.getController())
            .setImageRequest(requestBuilder)
            .build();
    draweeView.setHierarchy(hierarchy);
    draweeView.setController(controller);

     float[] f = new float[9]
     draweeView.getImageMatrix().getValues(f);
     float scaleY = f[Matrix.MSCALE_Y];
     Log.d("App","scale y is "+ scaleY);
}

结果:红色表示未填充图像的简单受票人 View 部分。这是比例类型 FIT_CENTER。当我使用 CENTER_CROP 时，图像会填满整个 ImageView ，图像的某些部分会被切掉，我不希望这样

问:如何获得缩放后的图像大小并使用它来调整我的 simpleDraweeView 的大小，或者换句话说，我如何让我的 simpleDraweeView 调整它的大小？

我将不胜感激。

Answer 1

为了调整 simpledraweeview 的大小，我实现了一个 ControllerListener 并根据需要更改了 simpleDraweeView 的高度。

private void loadImage(Uri fileUri,final SimpleDraweeView simpeDraweeView) {

    GenericDraweeHierarchyBuilder builder = new GenericDraweeHierarchyBuilder(context.getResources());

    GenericDraweeHierarchy hierarchy = builder
            .setProgressBarImage(new CircleProgressBarDrawable())
            .setActualImageScaleType(ScalingUtils.ScaleType.CENTER_CROP)
            .build();


    ImageRequest requestBuilder = ImageRequestBuilder.newBuilderWithSource(fileUri)
            .setProgressiveRenderingEnabled(true)
            .build();


    ControllerListener<ImageInfo> contollerListener = new BaseContollerListener<ImageInfo>() {

    public void onFinalImageSet(String id, ImageInfo imageinfo,Animatable animatable) {

        if(imageinfo != null) {
           updateViewSize(imageinfo)
         }
    }

    DraweeContoller contoller = Fresco.newDraweeContollerBuilder()
                 .setContollerListener(contollerListener)
                 .setImageRequest(requestBuilder)
                 .build();

    simpleDraweeView.setHierarchy(hierarchy);
    simpleDraweeView.setController(contoller);

}

private void updateViewSize(ImageInfo imageinfo){
 //this is my own implementation of changing simple-drawee-view height
 // you canhave yours using imageinfo.getHeight() or imageinfo.getWidth();
 simpleDraweeView.getLayoutParams().height = imageinfo.getHeight();

   // don't forget to call this method. thanks to @plamenko for reminding me.

   simpleDraweeView.requestLayout()
}