RecyclerView学习demo

compile 'com.android.support:recyclerview-v7:23.0.+'

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.recyclerview.MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical">
</android.support.v7.widget.RecyclerView>
</RelativeLayout>

package com.recyclerview;

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.List;

/**
* Created by c9736 on 2017/1/5.
*/

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder>{

public interface OnItemListener{
void onItemClick(View view, int position);
void onItemLongClick(View view , int position);

}

private OnItemListener onItemListener;

public void setOnItemListener(OnItemListener onItemListener) {
this.onItemListener = onItemListener;
}

private List<String> datas;
public MyAdapter (List<String>  datas){
this.datas=datas;
}
public void addData(int position){
datas.add(position,"insert"+position);
notifyItemInserted(position);
}
public void removeData(int position){
datas.remove(position);
notifyItemRemoved(position);
}
//创建新view
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.item,parent,false);
ViewHolder viewHolder=new ViewHolder(view);
return viewHolder;
}

@Override
public void onBindViewHolder(final ViewHolder holder, int position) {

holder.textView.setText(datas.get(position));
if(onItemListener!=null){
holder.textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int pos=holder.getLayoutPosition();
onItemListener.onItemClick(holder.itemView,pos);
}
});
holder.textView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
int pos=holder.getLayoutPosition();
onItemListener.onItemLongClick(holder.itemView,pos);
return false;
}
});
}
}

@Override
public int getItemCount() {
return datas.size();
}

public class ViewHolder extends RecyclerView.ViewHolder{
public TextView textView;
public ViewHolder(View view) {
super(view);
textView= (TextView) view.findViewById(R.id.textView);

}
}
}

package com.recyclerview;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

private List<String> mDatas;
RecyclerView recyclerView=null;
RecyclerView.LayoutManager layoutManager=null;
MyAdapter myAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initDatas();
recyclerView= (RecyclerView) findViewById(R.id.recycler);
//layoutManager=new LinearLayoutManager(this);//使用LinearyLayout布局显示
//layoutManager=new GridLayoutManager(this,4);//使用GridLayout方式显示，每行显示4个
//layoutManager=new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL);//使用瀑布流式布局 VERTICAL代表有2列
layoutManager=new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.HORIZONTAL);//使用瀑布流式布局 HORIZONTAL代表有2行

recyclerView.setLayoutManager(layoutManager);
recyclerView.setHasFixedSize(true);
myAdapter=new MyAdapter(mDatas);
myAdapter.setOnItemListener(new MyAdapter.OnItemListener() {
@Override
public void onItemClick(View view, int position) {
Toast.makeText(getApplicationContext(), position + " click",
Toast.LENGTH_SHORT).show();

}

@Override
public void onItemLongClick(View view, int position) {
Toast.makeText(getApplicationContext(
c03f
), position + " long click",
Toast.LENGTH_SHORT).show();
myAdapter.removeData(position);
}
});
recyclerView.setAdapter(myAdapter);
//添加动画
recyclerView.setItemAnimator(new DefaultItemAnimator());
//设置分隔 LayoutManager适用,DividerItemDecoration类没有提供，可以从网上拷贝来
/* recyclerView.addItemDecoration(new DividerItemDecoration(this,
DividerItemDecoration.VERTICAL_LIST));*/

}

private void initDatas() {
mDatas = new ArrayList<String>();
for (int i = 'A'; i < 'z'; i++)
{
mDatas.add("" + (char) i);
}

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main,menu);
return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.add:
myAdapter.addData(1);
break;
case R.id.remove:
myAdapter.removeData(1);
break;
}
return true;
}

}

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >

<item
android:id="@+id/add"
android:title="add"
/>
<item
android:id="@+id/remove"
android:title="remove"
/>

</menu>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="2dp">

<TextView
android:id="@+id/textView"
android:textSize="20sp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>