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找一找教程网网站的支持！
