Android Ui之Recycle View学习

RecycleView与ListView和GridView类似，我觉得像两者的统一，使用方式大体类似，不过RecycleView 将Adapter 中的ViewHolder进行了规范化，同时还可以对列表数据进行布局设置。我参考做了一个demo，效果如下：

1、添加库 'com.android.support:recyclerview-v7:23.0.0'

2、xml文件

<LinearLayout 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"
    android:orientation="vertical"
    tools:context="com.example.hornsey.myapplication.Demo.RecycleViewDemo">

    <RadioGroup
        android:id="@+id/radioGroup"
        android:gravity="center"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <RadioButton
            android:id="@+id/linear_layout_rb"
            android:text="Linear Layout Manager"
            android:checked="true"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1" />

        <RadioButton
            android:id="@+id/grid_layout_rb"
            android:text="Grid Layout Manager"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1" />
    </RadioGroup>

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

</LinearLayout>

3、自定义适配器，先创建ViewHolder,需继承自RecycleView.ViewHolder，然后覆盖相关方法。

package com.example.hornsey.myapplication.Demo;

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

/**
 * Created by hornsey on 2015/12/22.
 */
public class RAdapter extends RecyclerView.Adapter<RAdapter.ViewHolder> {

    private String[] mData;
    public RAdapter(String[] data) {
        super();
        mData = data;
    }

    public static class ViewHolder extends RecyclerView.ViewHolder{
        public TextView mTextView;

        public ViewHolder(View itemView) {
            super(itemView);
            mTextView = (TextView) itemView;
        }
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = View.inflate(parent.getContext(), android.R.layout.simple_list_item_1, null);
        // 创建一个ViewHolder
        ViewHolder holder = new ViewHolder(view);
        return holder;
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.mTextView.setText(mData[position]);
    }

    @Override
    public int getItemCount() {
        return mData.length;
    }
}

4、主文件实现。初始化一个刚刚定义adapter，给RecycleView设置adapter即可。RecycleView可以通过setLayoutManager
设置布局方式。

package com.example.hornsey.myapplication.Demo;

import android.app.Activity;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;

import com.example.hornsey.myapplication.R;

public class RecycleViewDemo extends Activity implements View.OnClickListener {
    private static final String TAG = "RecycleViewDemo";
    protected RecyclerView mRecyclerView;
    private RecyclerView.LayoutManager gridLayoutManager;
    private RecyclerView.LayoutManager linearLayoutManager ;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recycle_view_demo);

        String[] data = new String[50];
        for(int i = 0; i < data.length; i++){
            data[i] = "data" + i;
        }

        findViewById(R.id.linear_layout_rb).setOnClickListener(this);
        findViewById(R.id.grid_layout_rb).setOnClickListener(this);

        mRecyclerView = (RecyclerView) findViewById(R.id.recyclerView);
        linearLayoutManager = new LinearLayoutManager(this);
        gridLayoutManager = new GridLayoutManager(this, 4);

        RAdapter adapter = new RAdapter(data);
        mRecyclerView.setAdapter(adapter);
        mRecyclerView.setLayoutManager(linearLayoutManager);

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.linear_layout_rb:
                mRecyclerView.setLayoutManager(linearLayoutManager);
                break;
            case R.id.grid_layout_rb:
                mRecyclerView.setLayoutManager(gridLayoutManager);
                break;
            default:
                mRecyclerView.setLayoutManager(linearLayoutManager);
                break;
        }
    }
}