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Android RecyclerView仿新聞頭條的頻道管理功能

更新時間：2017年06月01日 16:55:26 作者：Peotry_Favour

這篇文章主要介紹了Android RecyclerView仿新聞頭條的頻道管理功能,需要的朋友可以參考下

需要在build里添加依賴

 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>
  <!--用來劃分上下的頻道-->
  <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下定義一個message.xml布局文件,用來顯示RecyclerView里的文字,跟listview的意義差不多

 <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" />

寫一個 MyItemOnClickListener 接口用來監(jiān)聽點擊事件,在里邊傳入兩個參數(shù),第一個是試圖,第二是點擊的下標(biāo)

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

RecyclerView的適配器類

//RecyclerView.Adapter<?>里寫的是優(yōu)化繼承ViewHolder的幫助類
public class ViewAdapter extends RecyclerView.Adapter<ViewAdapter.MyViewHolder> {
  private Context mContext;
  /**
  *特別注意一下mList后面一定要默認賦值,不然運行的時候會報錯,因為我們默認上面的RecyclerView是沒有添加數(shù)據(jù)的 
  */
  private List<String> mList=new ArrayList<>();
  private MyItemOnClickListener myItemOnClickListener;
  public ViewAdapter(Context context) {
    this.mContext = context;
  }
  //傳數(shù)組的方法
  public void setMessage(List<String> list) {
    this.mList = list;
  }
  //寫個方法把接口傳過來
  public void setMyItemOnClickListener(MyItemOnClickListener myItemOnClickListener) 
  {
    this.myItemOnClickListener = myItemOnClickListener;
  }
  @Override
  public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    //打氣筒填充我們自定義的message.xml的試圖
    View view = View.inflate(mContext, R.layout.messgae, null);
    //優(yōu)化
    final MyViewHolder holder = new MyViewHolder(view);
    //監(jiān)聽
    view.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        //調(diào)用我們自定義接口的方法
        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優(yōu)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的實現(xiàn)

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);
    //添加數(shù)據(jù)
    initData();
    initView();
  }
  //添加數(shù)據(jù)
    for (int i = 0; i < 15; i++) {
    //默認的我們只給下面的RecyclerView添加了數(shù)據(jù)
      listDown.add("頻道管理" + 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() {
    //創(chuàng)建適配器
    adapterUp = new ViewAdapter(MainActivity.this);
    //添加數(shù)據(jù),我們默認創(chuàng)建的時候是空的
    adapterUp.setMessage(listUp);
    recyclerView_up.setAdapter(adapterUp);
    //RecyclerView顯示樣式
    GridLayoutManager gridLayoutManagerUp = new GridLayoutManager(this, 3);
    recyclerView_up.setLayoutManager(gridLayoutManagerUp);
    //點擊監(jiān)聽
    adapterUp.setMyItemOnClickListener(new MyItemOnClickListener() {
      @Override
      public void onClick(View view, int position) {
        Log.e("Up", "上" + position);
        //下面的RecyclerView添加當(dāng)前點擊的條目信息并刷新數(shù)組
        listDown.add(listUp.get(position));
        adapterDown.setMessage(listDown);
        adapterDown.notifyDataSetChanged();
        //從當(dāng)前數(shù)組移除數(shù)據(jù)并刷新數(shù)組
        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添加當(dāng)前點擊的條目信息并刷新數(shù)組
        listUp.add(listDown.get(position));
        adapterUp.setMessage(listUp);
        adapterUp.notifyDataSetChanged();
        //從當(dāng)前數(shù)組移除數(shù)據(jù)并刷新數(shù)組
        listDown.remove(position);
        adapterDown.setMessage(listDown);
        adapterDown.notifyDataSetChanged();
      }
    });
  }
}

以上所述是小編給大家介紹的Android RecyclerView仿新聞頭條的頻道管理功能，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復(fù)大家的。在此也非常感謝大家對腳本之家網(wǎng)站的支持！

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