nav_draw_row.xml
<?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:clickable="true">
<TextView
android:id="@+id/title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="30dp"
android:paddingTop="10dp"
android:paddingBottom="10dp"
android:textSize="15dp"
android:textStyle="bold"
android:focusable="true"
android:outlineProvider="bounds" />
</RelativeLayout>
现在我想在nav_draw_row的末尾添加一个固定的Button,但每当我在TextView之后添加上面代码中的按钮时.它以下列方式显示:
我知道为什么会发生这种情况,但却无法找到解决方案,以便在Bar的最后修复Button.这是我的适配器代码:
public class NavigationDrawerAdapter extends RecyclerView.Adapter<NavigationDrawerAdapter.MyViewHolder> {
List<NavDrawerItem> data = Collections.emptyList();
private LayoutInflater inflater;
private Context context;
public NavigationDrawerAdapter(Context context, List<NavDrawerItem> data) {
this.context = context;
inflater = LayoutInflater.from(context);
this.data = data;
}
public void delete(int position) {
data.remove(position);
notifyItemRemoved(position);
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.nav_drawer_row, parent, false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
NavDrawerItem current = data.get(position);
holder.title.setText(current.getTitle());
}
@Override
public int getItemCount() {
return data.size();
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView title;
public MyViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.title);
}
}
}
如何解决这个问题?
最佳答案 在Recyclerview中构建一个Load More Button.
要做的第一件事是使用按钮创建布局并修改视图以获取按钮ID:
然后,制作按钮的一种简单方法是将1添加到getItemCount()和一个标志(即布尔值)以了解是否需要绘制按钮.
带有标志的新getItemCount将如下所示:
private boolean hasLoadButton = true;
public boolean isHasLoadButton() {
return hasLoadButton;
}
public void setHasLoadButton(boolean hasLoadButton) {
this.hasLoadButton = hasLoadButton;
notifyDataSetChanged();
}
@Override
public int getItemCount() {
if (hasLoadButton) {
return data.size() + 1;
} else {
return data.size();
}
}
然后你必须覆盖适配器的方法来获取视图的类型:
private final int TITLE = 0;
private final int LOAD_MORE = 1;
@Override
public int getItemViewType(int position) {
if (position < getItemCount()) {
return TITLE;
} else {
return LOAD_MORE;
}
}
如果位置介于0和data.size() – 1之间,则将为标题设置typeView,否则为load more按钮设置typeview.
现在我们必须创建视图持有者:
在onCreateViewHolder(ViewGroup parent,int viewType)方法中,y
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == TITLE) {
return new MyViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.nav_draw_row, parent, false));
} else if (view type == LOAD_MORE) {
return new MyViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.load_more_row, parent, false));
} else {
return null;
}
}
load_more_row
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<Button
android:id="@+id/load_more"
android:text="load more !"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</RelativeLayout>
不要忘记更改您的查看者以包含新按钮.
最后是onBindViewHolder方法:
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
if(position >= getItemCount) {
holder.loadMore....
} else {
NavDrawerItem current = data.get(position);
holder.title.setText(current.getTitle());
}
}
希望您能通过recyclerview做您想做的事!