Android下拉框带图片

最新推荐文章于 2021-05-28 20:44:10 发布

落灬花

最新推荐文章于 2021-05-28 20:44:10 发布

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分类专栏： Android 文章标签： android

本文链接：https://blog.youkuaiyun.com/waz929/article/details/83503549

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这篇博客详细介绍了如何在Android应用中创建一个带有图片的下拉选择框，通过MainActivity、book类和bookdao类的配合使用，实现了图文结合的下拉选项，提升用户体验。

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MainActivity 类

package com.example.android_06;

/**
 * 上课代码
 */

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.MultiAutoCompleteTextView;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity {
//    简单控件
//    搜索下拉框图片加描述
    private List<Map<String ,Object>> data3 = new ArrayList<>();
    private SimpleAdapter adapter3;

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

        /**
         * 搜索下拉框图片加描述
         */
//        初始化
loadData3();
        adapter3 = new SimpleAdapter(this,data3,R.layout.spinner_main_item1,new String[] {"img","desc"},new int[] {R.id.iv_main_img,R.id.tv_main_desc});
        spinner_main_img.setAdapter(adapter3);
        spinner_main_img.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                Map<String ,Object> itemAtPosition = (Map<String, Object>) parent.getItemAtPosition(position);
                Toast.makeText(MainActivity.this, itemAtPosition.toString(), Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });
    }

    /**
     * 搜索下拉框图片加描述
      */
    private void loadData3() {
        List<Book> list = new BookDAO().list();
        Map<String,Object> map;
        for (Book book : list) {
            map = new HashMap<>();
            map.put("img",book.getImage());
            map.put("desc",book.getName());
            data3.add(map);
        }
    }
}

book类

package com.example.android_06;

public class Book {

    private Integer id;
    private String name;
    private Integer image;

    public Book() {
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getImage() {
        return image;
    }

    public void setImage(Integer image) {
        this.image = image;
    }
}

bookdao类

package com.example.android_06;

import java.util.ArrayList;
import java.util.List;

public class BookDAO {
    public List<Book> list() {
        List<Book> bookList = new ArrayList<Book>();

        String[] names = {"愤怒的小鸟", "汤姆猫", "落汤鸡", "牛牛", "哈巴狗", "神龙", "烤鸭",
                "小象", "美人鱼", "九尾狐"};
        int[] images = {R.drawable.bird, R.drawable.cat, R.drawable.chicken,
                R.drawable.cow, R.drawable.dog, R.drawable.dragon,
                R.drawable.duck, R.drawable.elephant, R.drawable.fish,
                R.drawable.fox};

        Book b = null;
        for (int i = 0; i < names.length; i++) {
            b = new Book();
            b.setId(i + 1);
            b.setName(names[i]);
            b.setImage(images[i]);

            bookList.add(b);
        }

        return bookList;
    }
}