Android RecyclerView布局就这么简单

下面均为笔者demo中的代码；
1、创建一个接口，并在里面写上你需要实现的方法

//定义OnItemClickListener的接口,便于在实例化的时候实现它的点击效果 
public interface OnItemClickListener { 
  void onItemClick(View view, int position); 
} 

2、创建一个该接口的对象来存储监听事件
public OnItemClickListener mOnItemClickListener; 

3、在需要使用到该方法的地方进行调用

public ViewHolder(View itemView){ 
      super(itemView); 
      tvViewHolder=(TextView)itemView.findViewById(R.id.tv_view_holder); 
      llViewHolder=(LinearLayout) itemView; 
      llViewHolder.setOnClickListener(this); 
    } 

//通过接口回调来实现RecyclerView的点击事件 
    @Override 
    public void onClick(View v) { 
      if(mOnItemClickListener!=null) { 
        //此处调用的是onItemClick方法，而这个方法是会在RecyclerAdapter被实例化的时候实现 
        mOnItemClickListener.onItemClick(v, getItemCount()); 
      } 
    } 

源码截图：

MainActivity:

package com.example.double2.recyclerviewtest; 
 
import android.graphics.Color; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.GridLayoutManager; 
import android.support.v7.widget.LinearLayoutManager; 
import android.support.v7.widget.RecyclerView; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.Spinner; 
import android.widget.TextView; 
 
import java.util.ArrayList; 
import java.util.List; 
 
public class MainActivity extends AppCompatActivity { 
 
  private RecyclerView mRecyclerView; 
  private RecyclerAdapter mRecyclerAdapter; 
  private RecyclerView.LayoutManager mLayoutManager; 
  private Spinner mSpinner; 
 
  private List<String> mData = new ArrayList<String>(); 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
 
    //增加测试数据 
    mData.add("Recycler"); 
    mData.add("Recycler"); 
    mData.add("Recycler"); 
 
    initView(); 
  } 
 
  private void initView() { 
    mRecyclerView = (RecyclerView) findViewById(R.id.rc_main); 
    mLayoutManager = new LinearLayoutManager(this); 
    mRecyclerView.setLayoutManager(mLayoutManager); 
    mRecyclerView.setHasFixedSize(true); 
 
    //设置Spinner 
    mSpinner = (Spinner) findViewById(R.id.sp_main); 
    List<String> mList = new ArrayList<String>(); 
    mList.add("LinearLayout"); 
    mList.add("GridLayout"); 
    mSpinner.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mList)); 
    mSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
      @Override 
      public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
        switch (position) { 
          case 0: 
            //设置为线性布局 
            mRecyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this)); 
            break; 
          case 1: 
            //设置为网格布局,3列 
            mRecyclerView.setLayoutManager(new GridLayoutManager(MainActivity.this, 3)); 
            break; 
        } 
      } 
 
      @Override 
      public void onNothingSelected(AdapterView<?> parent) { 
 
      } 
    }); 
 
    mRecyclerAdapter = new RecyclerAdapter(mData); 
    mRecyclerView.setAdapter(mRecyclerAdapter); 
    mRecyclerAdapter.setOnItemClickListener(new RecyclerAdapter.OnItemClickListener() { 
      //此处实现onItemClick的接口 
      @Override 
      public void onItemClick(final View view, int position) { 
        TextView tvRecycleViewItemText = (TextView) view.findViewById(R.id.tv_view_holder); 
        //如果字体本来是黑色就变成红色，反之就变为黑色 
        if (tvRecycleViewItemText.getCurrentTextColor() == Color.BLACK) 
          tvRecycleViewItemText.setTextColor(Color.RED); 
        else 
          tvRecycleViewItemText.setTextColor(Color.BLACK); 
      } 
    }); 
 
    Button btnAdd = (Button) findViewById(R.id.btn_main_add); 
    Button btnDel = (Button) findViewById(R.id.btn_main_del); 
    btnAdd.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
        mData.add("Recycler"); 
        int position = mData.size(); 
        if (position > 0) 
          mRecyclerAdapter.notifyDataSetChanged(); 
      } 
    }); 
    btnDel.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
        int position = mData.size(); 
        if (position > 0) { 
          mData.remove(position - 1); 
          mRecyclerAdapter.notifyDataSetChanged(); 
        } 
      } 
    }); 
 
  } 
} 
								 
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