recylerview的使用
RecyclerView介绍
RecyclerView是一个低耦合的控件，里面的很多方法要自己实现，比如点击事件等等。 下面的程序介绍RecyclerView的基本使用，实现的功能有界面浏览，添加item，删除item。
下面是程序截图
代码实现
导入recylerview类
compile 'com.android.support:recyclerview-v7:23.0.1'新建item的布局
在layout里面新建文件item.xml,代码如下，这个代码就是recylerview里每一个小item的布局。
xml version="1.0" encoding="utf-8"?>
新建MyAdapter.java
该类实现视图和数据的绑定，并定于点击事件的接口
package com.example.whoami.recylerviewdemo;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;
import java.util.List;
/**
* Created by whoami on 2016/6/7.
*/
//实现MyAdater的继承方法
public class MyAdater extends RecyclerView.Adapter<MyAdater.ViewHolder>{
//在构造方法里，加入数据源
private List<String> mdata;
private LayoutInflater inflater;
private OnItemClickListener listener;
public MyAdater(List<String> mdata){
this.mdata = mdata;
}
//添加
public void addData(int position,String str){
mdata.add(position, str);
notifyItemInserted(position);
}
//删除
public void delete(int position){
mdata.remove(position);
notifyItemRemoved(position);
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
inflater = LayoutInflater.from(parent.getContext());
//R.layout.item是每一个item的小布局
View view = inflater.inflate(R.layout.item,parent,false);
return new ViewHolder(view);
}
public void setOnItemClickListener(OnItemClickListener listener) {
this.listener = listener;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
//绑定（添加）数据。
holder.data.setText(mdata.get(position));
}
@Override
public int getItemCount() {
return mdata.size();
}
//1.创建viewholder这个类,里面主要有一个view参数，和view里面布局的组件
class ViewHolder extends RecyclerView.ViewHolder{
private TextView data;
public ViewHolder(View itemView) {
super(itemView);
data = (TextView) itemView.findViewById(R.id.data);
data.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (listener!=null){
//重要语句！
int i = getLayoutPosition();
listener.onClick(view,i,mdata.get(i));
}
}
});
}
}
interface OnItemClickListener{
void onClick(View v,int position,String data);
}
} 新建MyItemDecoration.java
这个类主要是实现分割线功能的，这里没有去特别实现它，可以自行了解一下，这里略过
package com.example.whoami.recylerviewdemo;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.support.v7.widget.RecyclerView;
import android.view.View;
/**
* Created by whoami on 2016/6/7.
*/
public class MyItemDecoration extends RecyclerView.ItemDecoration{
//自行了解
@Override
public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
super.onDraw(c, parent, state);
}
@Override
public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
super.onDrawOver(c, parent, state);
}
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
super.getItemOffsets(outRect, view, parent, state);
}
} mainactivity.java代码和布局
代码
package com.example.whoami.recylerviewdemo;
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.AdapterView;
import android.widget.Toast;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private ArrayList<String> data;
private RecyclerView recyclerview;
private MyAdater myAdater;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerview = (RecyclerView) this.findViewById(R.id.recyclerview);
initData();
myAdater = new MyAdater(data);
recyclerview.setAdapter(myAdater);//添加adpter还要下面的代码才可以显示
//一列，普通的listview布局
recyclerview.setLayoutManager(new LinearLayoutManager(this));
//3列，卡片式布局
//recyclerview.setLayoutManager(new GridLayoutManager(this,3));
//4列，瀑布流布局
//recyclerview.setLayoutManager(new StaggeredGridLayoutManager(4, StaggeredGridLayoutManager.HORIZONTAL));
//添加分割线的方法
//recyclerview.addItemDecoration(new MyItemDecoration(content,1));
//监听器要自己实现，而且使用adpter调用，不是使用recyclerview调用
myAdater.setOnItemClickListener(new MyAdater.OnItemClickListener() {
@Override
public void onClick(View v, int position, String data) {
Toast.makeText(MainActivity.this, "position="+position, Toast.LENGTH_SHORT).show();
}
});
recyclerview.setItemAnimator(new DefaultItemAnimator());//设置默认动画。
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.mymenu,menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId())
{
case R.id.menu_add:
myAdater.addData(1,"add data");
break;
case R.id.menu_delete:
myAdater.delete(0);
break;
}
return true;
}
private void initData(){
data = new ArrayList<String>();
for(int i=0;i<20;i++){
data.add("this is data:"+i);
}
}
}布局
xml version="1.0" encoding="utf-8"?>
其他xml文件
color.xml
xml version="1.0" encoding="utf-8"?>
string.xml
name="app_name">RecylerViewDemo
name="add">添加
name="delete">删除
res/menu/mymenu.xml
xmlns:android="http://schemas.android.com/apk/res/android" >
android:id="@+id/menu_add"
android:orderInCategory="1"
android:icon="@android:drawable/ic_menu_add"
android:title="@string/add"/>
android:id="@+id/menu_delete"
android:orderInCategory="2"
android:icon="@android:drawable/ic_menu_delete"
android:title="@string/delete"/>
代码参考
视频参考:菜鸟窝
其他参考博客: Hongyang 碧海蓝天
源代码下载
百度云下载地址一
百度云下载地址二，提取码:scu2