调用setVisibility()方法后，RecyclerView项的高度发生变化

Question

我尝试在RecyclerView中通过滑动实现删除。在滑动项目后，我调用notifyItemChanged（）并在onBindViewHolder方法中更改视图的可见性。

public void onBindViewHolder(CustomViewHolder holder, int position) {
    if (isPendingRemoval(position)) {
        holder.textView.setVisibility(View.INVISIBLE);            
        holder.undoButton.setVisibility(View.VISIBLE);

        final int adapterPosition = holder.getAdapterPosition();

        holder.undoButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Runnable pendingRemovalRunnable = mPendingRunnables.get(adapterPosition);
                mHandler.removeCallbacks(pendingRemovalRunnable);
                mPendingRunnables.remove(adapterPosition);
                notifyItemChanged(adapterPosition);
            }
        });

    } else {
        holder.textView.setVisibility(View.VISIBLE);            
        holder.undoButton.setVisibility(View.INVISIBLE);
        holder.textView.setText(someText);            
    }
}

但在删除后，项目的高度会发生变化。截图

项目.xml：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:paddingTop="8dp"
    android:paddingBottom="8dp"
    android:paddingRight="8dp"
    android:paddingLeft="@dimen/activity_horizontal_margin">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/item_text"
        android:layout_gravity="center_vertical"/>
    <Button
        android:id="@+id/item_button_undo"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:text="@string/button_undo_text"
        android:layout_gravity="end|center_vertical"
        style="@style/Base.Widget.AppCompat.Button.Borderless"/>
</FrameLayout>

我能做些什么来节省物品的高度？

Answer 1

您可以尝试将按钮宽度设置为match_parent，只需更改其可见性而不是TextView的可见性（显然给出了项目的高度），这样，项目应保持高度和宽度，按钮应在TextView上可见隐藏它

public void onBindViewHolder(CustomViewHolder holder, int position) {
    if (isPendingRemoval(position)) {
        // holder.textView.setVisibility(View.INVISIBLE);            
        holder.undoButton.setVisibility(View.VISIBLE);

        final int adapterPosition = holder.getAdapterPosition();

        holder.undoButton.setOnClickListener(new View.OnClickListener() {
            @Override
             public void onClick(View v) {
                Runnable pendingRemovalRunnable = mPendingRunnables.get(adapterPosition);
                mHandler.removeCallbacks(pendingRemovalRunnable);
                mPendingRunnables.remove(adapterPosition);
                notifyItemChanged(adapterPosition);
            }
        });

    } else {
        // holder.textView.setVisibility(View.VISIBLE);            
        holder.undoButton.setVisibility(View.INVISIBLE);
        holder.textView.setText(someText);            
    }
}