package com.yuyh.sprintnba.support;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.view.View;
import com.yuyh.library.utils.log.LogUtils;
/**
* 支持emptyView
*
* @author yuyh.
* @date 16/6/10.
*/
public class SupportRecyclerView extends RecyclerView {
private View emptyView;
private AdapterDataObserver emptyObserver = new AdapterDataObserver() {
@Override
public void onChanged() {
LogUtils.i("smy", "adapter changed");
Adapter adapter = getAdapter();
if (adapter != null && emptyView != null) {
if (adapter.getItemCount() == 0) {
LogUtils.i("adapter visible");
emptyView.setVisibility(View.VISIBLE);
SupportRecyclerView.this.setVisibility(View.GONE);
} else {
LogUtils.i("adapter gone");
emptyView.setVisibility(View.GONE);
SupportRecyclerView.this.setVisibility(View.VISIBLE);
}
}
}
};
public SupportRecyclerView(Context context) {
super(context);
}
public SupportRecyclerView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SupportRecyclerView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public void setAdapter(Adapter adapter) {
Adapter oldAdapter = getAdapter();
if (oldAdapter != null && emptyObserver != null) {
oldAdapter.unregisterAdapterDataObserver(emptyObserver);
}
super.setAdapter(adapter);
if (adapter != null) {
adapter.registerAdapterDataObserver(emptyObserver);
}
emptyObserver.onChanged();
}
/**
* set view when no content item
*
* @param emptyView visiable view when items is empty
*/
public void setEmptyView(View emptyView) {
this.emptyView = emptyView;
}
}