1. 首先重写一个RecyclerView类

package com.onepilltest.others;import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;public class MyRecyclerView extends RecyclerView {private View emptyView;private static final String TAG = "EmptyRecyclerView";//数据监听者final private AdapterDataObserver adapterDataObserver = new AdapterDataObserver() {@Overridepublic void onChanged() {checkIfEmpty();}@Overridepublic void onItemRangeInserted(int positionStart, int itemCount) {Log.i(TAG, "onItemRangeInserted" + itemCount);checkIfEmpty();}@Overridepublic void onItemRangeRemoved(int positionStart, int itemCount) {checkIfEmpty();}};private void checkIfEmpty() {if (emptyView != null && getAdapter() != null) {final boolean emptyViewVisible =getAdapter().getItemCount() == 0;emptyView.setVisibility(emptyViewVisible ? VISIBLE : GONE);setVisibility(emptyViewVisible ? GONE : VISIBLE);}}@Overridepublic void setAdapter(@Nullable Adapter adapter) {final Adapter oldAdapter = getAdapter();if (oldAdapter != null) {oldAdapter.unregisterAdapterDataObserver(adapterDataObserver);}super.setAdapter(adapter);if (adapter != null) {adapter.registerAdapterDataObserver(adapterDataObserver);}checkIfEmpty();}//设置没有内容时，提示用户的空布局public void setEmptyView(View emptyView) {this.emptyView = emptyView;checkIfEmpty();}public MyRecyclerView(@NonNull Context context) {super(context);}public MyRecyclerView(@NonNull Context context, @Nullable AttributeSet attrs) {super(context, attrs);}public MyRecyclerView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}
}

1. 然后在activity中添加一个ImageView作为数据为空时显示的图片

<!--Empty提示图--><ImageViewandroid:id="@+id/empty_iv"android:layout_margin="20dp"android:layout_width="wrap_content"android:layout_height="wrap_content"android:scaleType="centerCrop"android:contentDescription="@null"android:src="@drawable/empty"android:layout_centerInParent="true" />

1. 最后添加下面的代码即可
   1. 找到相应的ImageView
   2. 调用setEmptyView方法

recyclerView.setEmptyView(mEmptyView);

1. 显示

有数据：

数据为空：