[移动开发]【SimpleList】

• list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent">
    <ImageView
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:scaleType="centerCrop"
        android:id="@+id/img"
        />
    <TextView
        android:id="@+id/title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />
    <TextView
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />
</LinearLayout>

• activity_simple.xml

<?xml version="1.0" encoding="utf-8"?>
<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=".SimpleListActivity">
    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/listview2" />

</LinearLayout>

• activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<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">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="文本列表：ArrayAdapter"
        android:textSize="40sp"
        android:onClick="toArrayList"
        android:layout_margin="20dp"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="图文列表"
        android:textSize="40sp"
        android:onClick="toSimpleList"
        android:layout_margin="20dp"/>

</LinearLayout>

• simplelistactivity.java

package com.example.listviewtest;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.widget.ListView;
import android.widget.SimpleAdapter;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class SimpleListActivity extends AppCompatActivity {

    private ListView listView;
    private SimpleAdapter simpleAdapter;
    private List<Map<String, Object>> mapList;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_simple_list);

        listView = findViewById(R.id.listview2);

        mapList = new ArrayList<>();
        for (int i = 0; i < 30; i++) {
            Map<String, Object> map = new HashMap<>();
            map.put("img", R.drawable.brs);
            map.put("keyword", "动漫" + i);
            map.put("content", "离离原上草， 一岁一枯荣" + i);

            mapList.add(map);
        }

        simpleAdapter = new SimpleAdapter(this, mapList,
              R.layout.list_item,
                new String[]{"img", "keyword", "content"},
                new int[]{
                        R.id.img,
                        R.id.title,
                        R.id.content
                });

        listView.setAdapter(simpleAdapter);
    }
}

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