Android RecyclerView仿新闻头条的频道管理功能

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

<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>

 <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" />

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

//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);    }  }}

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();      }    });  }}