RecyclerView简单使用方法

RecyclerView的添加依赖文件RecyclerView的常规使用方法RecyclerView的点击监听写法

添加依赖文件

Project Structure中的Modules下的Dependencies点击绿色的+号找到v7下的recyclerView库

res/layout文件代码如下

<android.support.v7.widget.RecyclerView android:id="@+id/recyclerview" android:layout_width="match_parent" android:layout_height="match_parent"> </android.support.v7.widget.RecyclerView>

Activity中的代码类似与ListView

//绑定View recyclerView = (RecyclerView) findViewById(R.id.recyclerview); //新建适配器 listAdapter = new DrawerListAdapter(list); //设置布局管理(可以实现ListView,GirdView,瀑布流等效果) RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this); recyclerView.setLayoutManager(layoutManager); //绑定适配器 recyclerView.setAdapter(listAdapter);

Activity中的代码

package com.example.zx.samle_bar; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.widget.ListView; import android.widget.Toast; import com.example.zx.samle_bar.Adapter.DrawerListAdapter; import com.example.zx.samle_bar.Bean.DrawerContext; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { private RecyclerView recyclerView; private List<DrawerContext> list; private DrawerListAdapter listAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); recyclerView = (RecyclerView) findViewById(R.id.recyclerview); list = new ArrayList<>(); initData(); RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this); recyclerView.setLayoutManager(layoutManager); recyclerView.setAdapter(listAdapter); } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.menu_main,menu); return super.onCreateOptionsMenu(menu); } private void initData(){ int[] imgs = {R.drawable.settings, R.drawable.helpcircle, R.drawable.sharevariant, R.drawable.wikipedia}; String[] names={"设置","帮助","分享","维基百科"}; for(int i = 0;i < 4;i ++){ DrawerContext context = new DrawerContext(imgs[i],names[i]); list.add(context); } } }

Adapter文件的代码如下

package com.example.zx.samle_bar.Adapter; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.RelativeLayout; import android.widget.TextView; import com.example.zx.samle_bar.Bean.DrawerContext; import com.example.zx.samle_bar.Interface.MyItemClickListener; import com.example.zx.samle_bar.R; import java.util.ArrayList; import java.util.List; /** * Created by zx on 2017-03-12. */ public class DrawerListAdapter extends RecyclerView.Adapter { private List<DrawerContext> drawerList; private MyItemClickListener listener; public DrawerListAdapter(List<DrawerContext> list){ this.drawerList = list; } @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { final View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_drawer_list,parent,false); RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); view.setLayoutParams(lp); return new MyViewHolder(view); } @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { DrawerContext context = drawerList.get(position); ((MyViewHolder)holder).img.setImageResource(context.getImg()); ((MyViewHolder)holder).tv.setText(context.getName()); ((MyViewHolder)holder).itemView.setTag(position); } @Override public int getItemCount() { return drawerList.size(); } public void setOnItemClickListener(MyItemClickListener listener){ this.listener = listener; } class MyViewHolder extends RecyclerView.ViewHolder{ public ImageView img; public TextView tv; public MyViewHolder(View view) { super(view); img = (ImageView) view.findViewById(R.id.icon); tv = (TextView) view.findViewById(R.id.name); } } }

DrawerContext的代码

package com.example.zx.samle_bar.Bean; /** * Created by zx on 2017-03-12. */ public class DrawerContext { private int img; private String name; public DrawerContext() { } public DrawerContext(int img, String name) { this.img = img; this.name = name; } public int getImg() { return img; } public void setImg(int img) { this.img = img; } public String getName() { return name; } public void setName(String name) { this.name = name; } }

重点！重点！重点

由于RecyclerView并现ClickListener的监听! 因此需要自己写一个回调来实现对点击事件的监听 步骤如下：

创建一个Interface

package com.example.zx.samle_bar.Interface; import android.view.View; /** * Created by zx on 2017-03-12. */ public interface MyItemClickListener { void onItemClick(View view,int position); }

在Adapter文件中实例化,调用onClickListener 传递给 onItemClick

private MyItemClickListener listener; view.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (listener == null){ listener.onItemClick(view,(int)view.getTag()); } } });

再到Activity中实现这个函数的回调

drawerListAdapter.setOnItemClickListener(new MyItemClickListener() { @Override public void onItemClick(View view, int postion) { Intent intent = new Intent(getApplicationContext(), SlideMenuActivity.class); intent.putExtra("itemId", postion); startActivity(intent); overridePendingTransition(R.anim.activity_in, R.anim.activity_out); } });

如果对回调函数有什么不明白的地方参见csdn大神的博客 http://blog.csdn.net/xiaanming/article/details/8703708/