列表视图ListView

1、创建ListView 控件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ListView
        android:id="@+id/lv_1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
</LinearLayout>

2、设置adapter数据适配器

 3、创建Adapter

public class MyListAdapter extends BaseAdapter {
    private Context mContext;
    private LayoutInflater mLayoutInflater;
    public MyListAdapter(Context context)
    {
        this.mContext= context;
        mLayoutInflater = LayoutInflater.from(context);
    }
    @Override
    public int getCount() {
        return 10;
    }

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

    @Override
    public long getItemId(int i) {
        return 0;
    }
    static class ViewHolder
    {
        public ImageView imageView;
        public TextView tvTitle;
        public TextView tvTime;
        public TextView tvContent;
    }
    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        ViewHolder holder=null;
        if (view ==null)
        {
            view = mLayoutInflater.inflate(R.layout.layout_list_item,null);
            holder= new ViewHolder();
            holder.imageView = view.findViewById(R.id.iv);
            holder.tvTitle = view.findViewById(R.id.tv_title);
            holder.tvTime= view.findViewById(R.id.tv_time);
            holder.tvContent = view.findViewById(R.id.tv_content);
            view.setTag(holder);
        }else
        {
            holder = (ViewHolder) view.getTag();
        }
        holder.tvTitle.setText("这个是标题");
        holder.tvTime.setText("2020-10-1");
        holder.tvContent.setText("这是一条内容");
        return view;
    }
}

4、item 的布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/iv"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:background="#000"
        android:scaleType="centerCrop"
        android:src="@drawable/bg_iron_man"/>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">
            <TextView
                android:padding="10dp"
                android:id="@+id/tv_title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp"
                android:textColor="#000"
                android:text="Hellow"/>

            <TextView
                android:id="@+id/tv_time"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp"
                android:textColor="#000"
                android:text="2019-9-10"/>

            <TextView
                android:id="@+id/tv_content"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp"
                android:textColor="#000"
                android:text="this is content."/>

        </LinearLayout>
</LinearLayout>