仿今日头条的频道管理

先展示一下效果

一、来看一下布局代码

<LinearLayout xmlns:android=“http://schemas.android.com/apk/res/android”

xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="5dp"
    android:padding="5dp"
    android:text="切换的栏目"
    android:textSize="20sp" />

<GridView
    android:id="@+id/G1"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"
    android:horizontalSpacing="5dp"
    android:numColumns="4"
    android:padding="5dp"
    android:scrollbars="none"
    android:verticalSpacing="5dp" />


<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="5dp"
    android:padding="5dp"
    android:text="更多栏目"
    android:textSize="20sp" />

<GridView
    android:id="@+id/G2"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"
    android:horizontalSpacing="5dp"
    android:numColumns="4"
    android:padding="5dp"
    android:scrollbars="none"
    android:verticalSpacing="5dp" />

//样式在drawble下创建xml给属性

<shape xmlns:android=“http://schemas.android.com/apk/res/android”

android:shape="rectangle">
<stroke
    android:width="2dp"
    android:color="#ff9900"/>

//以及在layout里创xml给Textview的父样式

<TextView

    android:background="@drawable/sh"
    android:id="@+id/text1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:padding="5dp"
    android:text="XXXXX"
    android:textAppearance="?android:attr/textAppearanceListItemSmall"
    tools:ignore="MissingConstraints" />

一、来看一下MainActivity代码

public class MainActivity extends AppCompatActivity {

private GridView G1,G2;
private ArrayList<String> list1;
private ArrayList<String> list2;
private GridAdapter adapter;
private GridAdapter adapter1;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    G1 = findViewById(R.id.G1);
    G2 = findViewById(R.id.G2);
    list1 = new ArrayList<>();
    list2 = new ArrayList<>();
    //模拟的list的数据
    list1.add("刘老根");
    list1.add("杜子藤");
    list1.add("丁克");
    list1.add("丛从林");
    list1.add("赵大爷");
    list1.add("朱八戒");
    list1.add("张开推");
    list1.add("宋外侩");
    for (int i = 0; i<12; i++){
        list2.add("你妈炸了"+i);
    }
    //适配器
    adapter = new GridAdapter(list1, MainActivity.this);
    adapter1 = new GridAdapter(list2, MainActivity.this);
    G1.setAdapter(adapter);
    G2.setAdapter(adapter1);
    G1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            //保存要删除的数据
            String str = list1.get(position);
            Toast.makeText(MainActivity.this,str.toString(),Toast.LENGTH_LONG).show();
            //删除第一个中的数据
            list1.remove(position);
            //把保存的数据传到第二个中
            list2.add(str);
            //刷新两个适配器
            adapter.notifyDataSetChanged();
            adapter1.notifyDataSetChanged();
        }
    });
    G2.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            //保存要删除的数据
            String str = list2.get(position);
            //删除第一个中的数据
            list2.remove(position);
            //把保存的数据传到第二个中
            list1.add(str);
            //刷新两个适配器
            adapter.notifyDataSetChanged();
            adapter1.notifyDataSetChanged();
        }
    });
}

}

三、适配器类

public class GridAdapter extends BaseAdapter {

private ArrayList<String> list;
private Context context;

public GridAdapter(ArrayList<String> list, Context context) {
    this.list = list;
    this.context = context;
}

@Override
public int getCount() {
    return list.size();
}

@Override
public Object getItem(int position) {
    return null;
}

@Override
public long getItemId(int position) {
    return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    convertView = View.inflate(context,R.layout.item,null);
    TextView textView = convertView.findViewById(R.id.text1);
    textView.setText(list.get(position));
    Toast.makeText(context,list.get(position).toString(),Toast.LENGTH_LONG).show();
    return convertView;
}

}

大功告成