Android RecyclerView仿新闻头条的频道管理功能

需要在build里添加依赖

 compile 'com.android.support:recyclerview-v7:25.3.1'

布局文件activity_main

<android.support.v7.widget.RecyclerView
    android:layout_weight="1"
    android:id="@+id/recyclerView_up"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
  </android.support.v7.widget.RecyclerView>
  <!--用来划分上下的频道-->
  <View
    android:layout_width="match_parent"
    android:layout_height="1dp"
    android:background="#999999">
  </View>
  <android.support.v7.widget.RecyclerView
    android:layout_weight="1"
    android:id="@+id/recyclerView_down"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
  </android.support.v7.widget.RecyclerView>

在layout下定义一个message.xml布局文件,用来显示RecyclerView里的文字,跟listview的意义差不多

 <TextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="5dp"
    android:padding="3dp"
    android:text="123123123" />

写一个 MyItemOnClickListener 接口用来监听点击事件,在里边传入两个参数,第一个是试图,第二是点击的下标

public interface MyItemOnClickListener {
  void onClick(View view,int position);
}

RecyclerView的适配器类

//RecyclerView.Adapter<?>里写的是优化继承ViewHolder的帮助类
public class ViewAdapter extends RecyclerView.Adapter<ViewAdapter.MyViewHolder> {
  private Context mContext;
  /**
  *特别注意一下mList后面一定要默认赋值,不然运行的时候会报错,因为我们默认上面的RecyclerView是没有添加数据的 
  */
  private List<String> mList=new ArrayList<>();
  private MyItemOnClickListener myItemOnClickListener;
  public ViewAdapter(Context context) {
    this.mContext = context;
  }
  //传数组的方法
  public void setMessage(List<String> list) {
    this.mList = list;
  }
  //写个方法把接口传过来
  public void setMyItemOnClickListener(MyItemOnClickListener myItemOnClickListener) 
  {
    this.myItemOnClickListener = myItemOnClickListener;
  }
  @Override
  public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    //打气筒填充我们自定义的message.xml的试图
    View view = View.inflate(mContext, R.layout.messgae, null);
    //优化
    final MyViewHolder holder = new MyViewHolder(view);
    //监听
    view.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        //调用我们自定义接口的方法
        myItemOnClickListener.onClick(v, holder.getLayoutPosition());
      }
    });
    return holder;
  }
  @Override
  public void onBindViewHolder(MyViewHolder holder, int position) {
    MyViewHolder viewHolder = holder;
    viewHolder.textView.setText(mList.get(position));
  }
  @Override
  public int getItemCount() {
    return mList.size();
  }
  //ViewHolder优化
  static class MyViewHolder extends RecyclerView.ViewHolder {
    private TextView textView;
    public MyViewHolder(View itemView) {
      super(itemView);
      textView = (TextView) itemView.findViewById(R.id.textView);
    }
  }
}

在MainActivity的实现

public class MainActivity extends AppCompatActivity {
  private RecyclerView recyclerView_up;
  private RecyclerView recyclerView_down;
  private List<String> listUp = new ArrayList<>();
  private List<String> listDown = new ArrayList<>();
  private ViewAdapter adapterUp;
  private ViewAdapter adapterDown;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    //添加数据
    initData();
    initView();
  }
  //添加数据
    for (int i = 0; i < 15; i++) {
    //默认的我们只给下面的RecyclerView添加了数据
      listDown.add("频道管理" + i);
    }
  }
  private void initView() {
    recyclerView_up = (RecyclerView) findViewById(R.id.recyclerView_up);
    recyclerView_down = (RecyclerView) findViewById(R.id.recyclerView_down);
    initUp();
    initDown();
  }
  private void initUp() {
    //创建适配器
    adapterUp = new ViewAdapter(MainActivity.this);
    //添加数据,我们默认创建的时候是空的
    adapterUp.setMessage(listUp);
    recyclerView_up.setAdapter(adapterUp);
    //RecyclerView显示样式
    GridLayoutManager gridLayoutManagerUp = new GridLayoutManager(this, 3);
    recyclerView_up.setLayoutManager(gridLayoutManagerUp);
    //点击监听
    adapterUp.setMyItemOnClickListener(new MyItemOnClickListener() {
      @Override
      public void onClick(View view, int position) {
        Log.e("Up", "上" + position);
        //下面的RecyclerView添加当前点击的条目信息并刷新数组
        listDown.add(listUp.get(position));
        adapterDown.setMessage(listDown);
        adapterDown.notifyDataSetChanged();
        //从当前数组移除数据并刷新数组
        listUp.remove(position);
        adapterUp.setMessage(listUp);
        adapterUp.notifyDataSetChanged();
      }
    });
  }
  private void initDown() {
    adapterDown = new ViewAdapter(MainActivity.this);
    adapterDown.setMessage(listDown);
    recyclerView_down.setAdapter(adapterDown);
    GridLayoutManager gridLayoutManagerDown = new GridLayoutManager(this, 3);
    recyclerView_down.setLayoutManager(gridLayoutManagerDown);
    adapterDown.setMyItemOnClickListener(new MyItemOnClickListener() {
      @Override
      public void onClick(View view, int position) {
        Log.e("Down", "下" + position);
        //下面的RecyclerView添加当前点击的条目信息并刷新数组
        listUp.add(listDown.get(position));
        adapterUp.setMessage(listUp);
        adapterUp.notifyDataSetChanged();
        //从当前数组移除数据并刷新数组
        listDown.remove(position);
        adapterDown.setMessage(listDown);
        adapterDown.notifyDataSetChanged();
      }
    });
  }
}

以上所述是小编给大家介绍的Android RecyclerView仿新闻头条的频道管理功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对呐喊教程网站的支持！

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