先说使用RecyclerView要实现的必要步骤：
1.用LayoutManager管理它的布局：横向或竖向，不同的布局风格；
2.实现Adapter类继承RecyclerView.Adapter类；
3.RecyclerView.addItemDecoration(newDividerItemDecoration()):
制作item之间的分割线；
4.RecyclerView.setItemAnimator（new MyItemAnimator()）:制作删除添加item等操作的动画效果；
5.实现RecyclerView的事件监听器：点击，长按等
mRecyclerView = findView(R.id.id_recyclerview);
//设置布局管理器
mRecyclerView.setLayoutManager(layout);
//设置adapter
mRecyclerView.setAdapter(adapter)
//设置Item增加、移除动画
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
//添加分割线
mRecyclerView.addItemDecoration(new DividerItemDecoration(
getActivity(), DividerItemDecoration.HORIZONTAL_LIST));
实现步骤
使用RecyclerView之前我们要导入相对应的包：
compile 'com.android.support:recyclerview-v7:+'
布局文件：主布局
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
item子布局：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:background="@drawable/item_bg"
android:layout_margin="3dp"
android:layout_height="72dp">
<TextView
android:layout_width="72dp"
android:layout_height="match_parent"
android:id="@+id/Item_text"
android:gravity="center" />
</LinearLayout>
一.设置它的布局管理：
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false);
recyclerView.setLayoutManager(linearLayoutManager);
三个布局：直接上源代码
1 .线性布局：
/** * @param context Current context, will be used to access resources.
* @param orientation Layout orientation. Should be {@link #HORIZONTAL} or{@link#VERTICAL}.
* @param reverseLayout When set to true, layouts from end to start.
*/
public LinearLayoutManager(Context context, int orientation, boolean reverseLayout) {
mAnchorInfo = new AnchorInfo();
setOrientation(orientation);
setReverseLayout(reverseLayout);
}
2.格子布局：
/** * @param context Current context, will be used to access resources.
* @param spanCount The number of columns or rows in the grid
* @param orientation Layout orientation. Should be {@link #HORIZONTAL} or {@link
* #VERTICAL}.
* @param reverseLayout When set to true, layouts from end to start.
*/
public GridLayoutManager(Context context, int spanCount, int orientation,
boolean reverseLayout) {
super(context, orientation, reverseLayout);
setSpanCount(spanCount);
}
3.瀑布流布局：
/** * Creates a StaggeredGridLayoutManager with given parameters.
*
* @param spanCount If orientation is vertical, spanCount is number of columns. If
* orientation is horizontal, spanCount is number of rows.
* @param orientation {@link #VERTICAL} or {@link #HORIZONTAL}
*/
public StaggeredGridLayoutManager(int spanCount, int orientation) {
mOrientation = orientation;
setSpanCount(spanCount);
}
二.创建适配器
public class MyRecyclerViewAdatper extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private LayoutInflater inflater;
private Context context;
private List<String> datas;
private OnitemClickListener onitemClickListener;
public interface OnitemClickListener{
void onItemClick(View view,int positon);
void onItemLongClick(View view,int position);
}
public void setOntermClickListener(OnitemClickListener ontermClickListener){
this.onitemClickListener = ontermClickListener;
}
public MyAdapter(Context context,List<String> datas){
this.context = context;
this.datas = datas;
inflater = LayoutInflater.from(context);
}
@Override
public long getItemId(int position) {//返回数据的id
return super.getItemId(position);
}
@Override
public int getItemCount() { //返回数据的数量
return datas.size();
}
@Override
public int getItemViewType(int position) { //放回item的类型（制定不同风格的item要用到）
return position;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
//这个函数是初始化视图，返回一个ViewHolder，方法是把View直接封装在ViewHolder中，然后我们面向的是ViewHolder这个实例
View view = inflater.inflate(R.layout.item,parent,false);
MyViewHolder myViewHolder = new MyViewHolder(view);
return myViewHolder;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
//对视图的操作主要放在这里
holder.textView.setText(datas.get(position));
if(onitemClickListener!=null){
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onitemClickListener.onItemClick(holder.itemView, position);
}
});
holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
onitemClickListener.onItemLongClick(holder.itemView, position);
return false;
}
});
}
}
public void addData(int pos){
datas.add(pos,"Insert one");
notifyItemInserted(pos);
}
public void deletData(int pos){
datas.remove(pos);
notifyItemRemoved(pos);
}
//就是一个持有者的类，他里面一般没有方法，只有属性，作用就是一个临时的储存器，
//把你getView方法中每次返回的View存起来，可以下次再用。这样做的好处就是不必每次都到布局文件中去拿到你的View，提高了效率。
class MyViewHolder extends RecyclerView.ViewHolder{
TextView textView;
public MyViewHolder(View itemView) {
super(itemView);
textView = (TextView)itemView.findViewById(R.id.Item_text);
}
}
说明：
notifyItemInserted(pos);//增加item
notifyItemRemoved(pos);//删除item