Android RecyclerView仿新闻头条的频道管理功能

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

 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 { 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 mList=new ArrayList<>(); private MyItemOnClickListener myItemOnClickListener; public ViewAdapter(Context context) { this.mContext = context; } //传数组的方法 public void setMessage(List 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 listUp = new ArrayList<>(); private List 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(); } }); } }