带有 StaggeredGridLayoutManager 的 RecyclerView，图像从 Glide 加载

Question

我在显示 RecyclerView 和 StaggeredGridLayoutManager 时遇到问题，其项目包含 imageview，图像是使用 glide 在 imageview 中加载的。我面临的问题是，在加载图像后，它们不会交错并且大小相等，两列之间也有很大的差距。如何在列中不留空隙的情况下改变图像的高度？

Answer 1

首先初始化你的RecyclerView

 RecyclerView recyclerGallery = (RecyclerView)findViewById(R.id.gallery_recycler_view);
 gaggeredGridLayoutManager = new StaggeredGridLayoutManager(3, 1);
 recyclerGallery.setLayoutManager(gaggeredGridLayoutManager);
 galleryAdapter = new GalleryAdaptor(ProfImageGallery.this, imgsUrl);
 recyclerGallery.setAdapter(galleryAdapter);

然后是你的适配器（根据需要编辑）

  public class GalleryAdaptor extends RecyclerView.Adapter<GalleryAdaptor.ViewHolder> {

        private Context mContext;
        private ArrayList<String> mDataset;


  // Provide a suitable constructor (depends on the kind of dataset)
        public GalleryAdaptor(Context mContext, ArrayList<String> mdataList) {
              this.mContext = mContext;
              this.mDataset = mdataList;
        }

        // Create new views (invoked by the layout manager)
        @Override
        public GalleryAdaptor.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

              // create a new view
              View v = LayoutInflater.from(parent.getContext())
                             .inflate(R.layout.row_gallery, parent, false);

              // set the view's size, margins, paddings and layout parameters 
              ViewHolder vh = new ViewHolder(v);
              return vh;
        }

        // Replace the contents of a view (invoked by the layout manager)
        @Override
        public void onBindViewHolder(final ViewHolder holder, final int position) {
              // - get element from your dataset at this position
              // - replace the contents of the view with that element


              String imageUrl = mDataset.get(position);

              holder.progressBar.setVisibility(View.VISIBLE); 

              //load the image url with a callback to a callback method/class

              Picasso.with(mContext)
                    .load(imageUrl)
                    .into(holder.workImage, 
                          new ImageLoadedCallback(holder.progressBar) {
                                @Override
                                public void onSuccess() {
                                      if (holder.progressBar != null) {
                                            holder.progressBar.setVisibility(View.GONE);
                                      }
                                }
                          });
        }

替换 Picaso 代码即

  Picasso.with(mContext)
        .load(imageUrl)
        .into(holder.workImage, 
              new ImageLoadedCallback(holder.progressBar) {
                    @Override
                    public void onSuccess() {
                          if (holder.progressBar != null) {
                                holder.progressBar.setVisibility(View.GONE);
                          }
                    }
              });

有滑行。

  Glide.with(this).load(imageUrl).into(imageView);

Answer 2

终于找到答案了。我必须创建自定义图像视图以在 Staggered Recycler View 中改变其纵横比。

public class DynamicHeightNetworkImageView extends ImageView {
private float mAspectRatio = 1.5f;

public DynamicHeightNetworkImageView(Context context) {
    super(context);
}

public DynamicHeightNetworkImageView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public DynamicHeightNetworkImageView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
}

public void setAspectRatio(float aspectRatio) {
    mAspectRatio = aspectRatio;
    requestLayout();
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    int measuredWidth = getMeasuredWidth();
    setMeasuredDimension(measuredWidth, (int) (measuredWidth / mAspectRatio));
}
}

然后在适配器的 onBindViewHolder 中，我通过 -

设置图像的纵横比

Picasso.with(this).load(THUMB_URL).into(holder.thumbnailView);
holder.thumbnailView.setAspectRatio(ASPECT_RATIO));

Answer 3

我遇到了同样的问题。对我有用的是为我的 ImageView 设置 android:adjustViewBounds="true"。我什至没有设置 scaleType。

这是我的布局文件的全部内容，item.xml。

<?xml version="1.0" encoding="utf-8"?>
<ImageView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/gif_image"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/colorFiller"
    android:adjustViewBounds="true"/>

希望对您有所帮助！

Answer 4

将android:adjustViewBounds="true"添加到项目布局中的ImageView，并在Glide中使用CenterCrop和FitCenter，如下所示：

Glide.with(vh.view.getContext())
        .load(item.getUrl())
        .centerCrop()
        .fitCenter()
        .thumbnail(0.3f)
        .placeholder(R.drawable.img_placeholder)
        .into(vh.image);

Answer 5

对我来说很有效

        Picasso.get()
                .load(uploadCurrent.getImageUrl())
                .placeholder(R.drawable.loading)
                .config(Bitmap.Config.RGB_565)
                .into(holder.imageView);

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="2dp"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <ImageView
        android:id="@+id/id_imgItem"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:adjustViewBounds="true"/>
    <TextView
        android:id="@+id/textview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/id_imgItemGets"
        android:paddingTop="4dp"
        android:paddingBottom="4dp"
        android:gravity="center_horizontal"
        android:textSize="18sp"/>

</RelativeLayout>

带有 StaggeredGridLayoutManager 的 RecyclerView，图像从 Glide 加载

RecyclerView with StaggeredGridLayoutManager with images loading from Glide

android

staggered-gridview

staggeredgridlayout

android-recyclerview

android-glide