RecyclerView 小记

RecyclerView，是在v7包加入的，一个灵活的view可以展示巨大的数据集，类似于listview的viewholder复用已经优化好了。

 

语言是苍白的，代码是最生动的叙说：

 

布局：

<FrameLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".ui.main.MainActivity"

    android:padding="12dp"

    android:orientation="vertical">



    <android.support.v7.widget.RecyclerView

        android:id="@+id/recycler"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:overScrollMode="never"

        android:clipToPadding="false"/>



    <ProgressBar

        android:id="@+id/progress"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:visibility="gone"

        />



</FrameLayout>

　　

 

adapter:

package com.escorps.retrodagger.adapter;



import android.support.v7.widget.RecyclerView;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.TextView;

import com.escorps.retrodagger.R;

import com.escorps.retrodagger.models.PetModel;

import java.util.List;

import butterknife.ButterKnife;

import butterknife.InjectView;



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



    private List<PetModel> items;



    public void setItems(List<PetModel> items){

        this.items = items;

    }



    @Override public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {



        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_recycler, parent, false);

        return new ViewHolder(v);

    }



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

        final PetModel item = items.get(position);



        holder.textName.setText(item.getName());



        holder.itemView.setTag(item);

    }



    @Override public int getItemCount() {

        return items.size();

    }



    protected static class ViewHolder extends RecyclerView.ViewHolder {



        @InjectView(R.id.textName) TextView textName;



        public ViewHolder(View itemView) {

            super(itemView);

            

            ButterKnife.inject(this, itemView);

        }

    }



}

View Code

 

注意在使用adapter之前： recyclerView.setLayoutManager(new GridLayoutManager(this, 1));