[移动开发]实现搜索查询功能

FoodUtils.java

package com.example.healthydiet;

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

public class FoodUtils {
    private static final String[] food = {
            "猪肉","猪肝","牛肉","猪肝","牛肉","猪肝","牛肉","猪肝",
            "猪肝","牛肉","猪肝","牛肉","猪肝","牛肉","猪肝","牛肉",
            "猪肝","牛肉","猪肝","牛肉","猪肝","zhu","猪肝","牛肉",
            "猪肝","牛肉","猪肝","牛肉","猪肝","zhu"};
    private static final String[] food1 ={
            "黄瓜","芥末","黄瓜","芥末","黄瓜","芥末","黄瓜","芥末",
            "黄瓜","芥末","黄瓜","芥末","黄瓜","芥末","黄瓜","芥末",
            "黄瓜","芥末","黄瓜","芥末","黄瓜","芥末","黄瓜","芥末",
            "黄瓜","芥末","黄瓜","芥末","黄瓜","芥末"};
    private static final int[] resId = {
            R.mipmap.ic_launcher,  R.mipmap.ic_launcher,   R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,   R.mipmap.ic_launcher,   R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,   R.mipmap.ic_launcher,   R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,   R.mipmap.ic_launcher,   R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,   R.mipmap.ic_launcher,   R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,   R.mipmap.ic_launcher,   R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,   R.mipmap.ic_launcher,   R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,   R.mipmap.ic_launcher,   R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,   R.mipmap.ic_launcher,   R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,   R.mipmap.ic_launcher,   R.mipmap.ic_launcher};
    private static final String[] foodjianjie = {
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一",
            "猪肉是目前人们餐桌上最常见的肉类食物之一","猪肉是目前人们餐桌上最常见的肉类食物之一"};
    public static List<FoodBean> getAilFoodList() {
        List<FoodBean> list =new ArrayList<>();
        for (int i = 0; i< food.length;i++) {
            FoodBean bean = new FoodBean(food[i],food1[i],foodjianjie[i],resId[i] );
            list.add(bean);
        }

        return list;
    }
}

FoodBean.java

package com.example.healthydiet;

public class FoodBean {
    private String title;
    private String notmatch;
    private String dasc;
    private int picId;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getNotmatch() {
        return notmatch;
    }

    public void setNotmatch(String notmatch) {
        this.notmatch = notmatch;
    }

    public String getDasc() {
        return dasc;
    }

    public void setDasc(String dasc) {
        this.dasc = dasc;
    }

    public int getPicId() {
        return picId;
    }

    public void setPicId(int picId) {
        this.picId = picId;
    }

    public FoodBean(String title, String notmatch, String dasc, int picId) {
        this.title = title;
        this.notmatch = notmatch;
        this.dasc = dasc;
        this.picId = picId;
    }
}

infoListAdatpter.java

package com.example.healthydiet;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.List;

public class infoListAdatpter extends BaseAdapter {
    Context context;
    List<FoodBean> mDatas;

    public infoListAdatpter(Context context, List<FoodBean> mDatas) {
        this.context = context;
        this.mDatas = mDatas;
    }
//决定ListView列表的行数
    @Override
    public int getCount() {
        return mDatas.size();
    }
//返回指定位置对应的数据
    @Override
    public Object getItem(int position) {
        return mDatas.get(position);
    }
//返回指定位置所对应的id
    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if (convertView == null) {
            //将布局转换成View的方法
            convertView = LayoutInflater.from(context).inflate(R.layout.item_infolist_lv,null);
            holder = new ViewHolder(convertView);
            convertView.setTag(holder);

        }else {
            holder = (ViewHolder) convertView.getTag();
        }
        //获取集合指定位置的数据
        FoodBean foodBean = mDatas.get(position);
        holder.titleTv.setText(foodBean.getTitle());
        holder.notTv.setText("不可匹配"+foodBean.getNotmatch());
        holder.iv.setImageResource(foodBean.getPicId());
        return convertView;
    }
    class ViewHolder{
        ImageView iv;
        TextView titleTv,notTv;
        public ViewHolder(View view) {
            iv = view.findViewById(R.id.item_info_iv);
            titleTv = view.findViewById(R.id.itme_info_tv_title);
            notTv = view.findViewById(R.id.item_info_tv_notmatch);

        }
    }
}

item_infolist_lv.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="10dp">
<ImageView
    android:id="@+id/item_info_iv"
    android:layout_width="120dp"
    android:layout_height="80dp"
    android:src="@mipmap/ic_launcher"
    android:scaleType="fitXY"
    />
    <TextView
        android:id="@+id/itme_info_tv_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@+id/item_info_iv"
        android:layout_marginTop="10dp"
        android:text="牛奶"
        android:layout_marginLeft="10dp"
        android:textSize="20sp"
        />
    <TextView
        android:id="@+id/item_info_tv_notmatch"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/itme_info_tv_title"
        android:layout_alignBottom="@+id/item_info_iv"
        android:text="钢筋"
        />
    <ImageView
        android:id="@+id/itme_info_iv_next"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/ic_launcher"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        />
</RelativeLayout>

activity_info_list.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=".infoListActivity">

    <RelativeLayout
        android:padding="10dp"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:background="@color/purple_200">
        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/info_flush"
            android:src="@mipmap/ic_launcher"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            />
        <ImageView
            android:id="@+id/info_iv_search"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@mipmap/ic_launcher"
            android:layout_toLeftOf="@+id/info_flush"
            android:layout_marginRight="20dp"
            android:layout_marginLeft="20dp"
            />
        <EditText
            android:id="@+id/info_et_search"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:paddingLeft="20dp"
            android:layout_toLeftOf="@+id/info_iv_search"
            android:textColor="@color/white"
            android:background="@drawable/info_et_bg"
            />
    </RelativeLayout>
    <ListView
        android:id="@+id/info_lv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:divider="@color/dividercolor"
        android:dividerHeight="1dp"
        >

    </ListView>
</LinearLayout>

infoListActivity.java

package com.example.healthydiet;

import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

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

public class infoListActivity extends AppCompatActivity implements View.OnClickListener{
    EditText searchEt;
    ImageView searchLv,flusIv;
    ListView showLw;
    //listView数据源
    List<FoodBean>mDatas;
    List<FoodBean>allFoodList;
    private infoListAdatpter adpter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_info_list);
        //查找控件
        initView();
        //2.找到ListView对应的数据源
        mDatas = new ArrayList<>();
        allFoodList = FoodUtils.getAilFoodList();
        mDatas.addAll(allFoodList);
        //3.创建设配器，BaseAdapter的子类
        adpter = new infoListAdatpter(this,mDatas);
        showLw.setAdapter(adpter);

    }
    private void initView() {
        searchEt = findViewById(R.id.info_et_search);
        searchLv = findViewById(R.id.info_iv_search);
        flusIv = findViewById(R.id.info_flush);
        showLw = findViewById(R.id.info_lv);
        searchLv.setOnClickListener(this);//添加点击事件监听
        flusIv.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.info_flush://刷新
                mDatas.clear();
                mDatas.addAll(allFoodList);
                adpter.notifyDataSetChanged();
                break;
            case R.id.info_iv_search://搜索
                String msg = searchEt.getText().toString().trim();//获取输入信息
                //获取输入内容，内容不为空
                if (TextUtils.isEmpty(msg)) {
                    Toast.makeText(this,"输入内容不能为空",Toast.LENGTH_LONG).show();
                    return;
                }
                //判断所有食物列表的标题是否包含输入内容，如果包含，就添加到小集合中
                List<FoodBean> list = new ArrayList<>();
                for (int i = 0;i <allFoodList.size();i++) {
                    String title = allFoodList.get(i).getTitle();
                    if (title.contains(msg)) {
                        list.add(allFoodList.get(i));
                    }
                }
                mDatas.clear(); //清空ListView的适配器内容
                mDatas.addAll(list);//添加新的数据到数据源中
                adpter.notifyDataSetChanged();//提示设配器更新
                break;
            default:
                break;
        }


    }
}

MainActivity.java

package com.example.healthydiet;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

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

    public void onClick(View view) {
        Intent intent = new Intent();
       switch (view.getId()){
           case R.id.home_btn1:
               intent.setClass(MainActivity.this,infoListActivity.class);
               startActivity(intent);
               break;
           default:
               break;
       }
    }
}

info_et_bg.xml 这个文件放drawable文件下

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <corners android:radius="8dp"></corners>
    <stroke android:width="2dp" android:color="@color/white"></stroke>


</shape>

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"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/home_btn1"
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:background="@color/black"
        android:layout_marginTop="180dp"
        android:onClick="onClick"
        />

</LinearLayout>