利用Adapter动态刷新数据实现联想词提示

作者: koinzhang | 来源:发表于2019-01-22 22:33 被阅读79次

最近要实现一个需求：根据edittext输入框内的关键词，动态的在listpopwindow中显示联想词，利用listpopwindow实现下拉框提示，可以参考我的另一篇文章listpopwindow实现EditText下拉框显示列表。
先上效果图

adapter动态刷新数据
博主的思路是为edittext设置文字变化监听addTextChangedListener，在onTextChanged方法，实现关键词判断（判断出应该显示哪些提示词），然后将新的提示词放进matchList集合中，通知adapter刷新view。
关键代码：

 @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                if (inputCompany.getText().toString().length() > 0) {
                    setCompany.setBackgroundColor(getColor(R.color.dark_blue));

                    //这是博主自己写的工具类，用来判断包含用户输入的关键词的提示词
                    KeyWordMatch keyWordMatch = new KeyWordMatch();

                    List<String> ml = keyWordMatch.getMatch(list,s.toString());//新的提示词集合
                    matchList.clear();//清除原有matchList集合
                    matchList.addAll(ml);//将新的提示词赋值给matchList
                    adapter.notifyDataSetChanged();//通知view数据源改变，刷新biew
                    listPopupWindow.show();//显示listpopwindow
                }
            }

下面贴出实现这个功能所需的代码，包括一个主activity：CompanySet.java；主activity的布局文件：companyset.xml；一个listpopwinodw的item的布局文件：companyitem.xml；一个工具类，用来判断应显示的提示词：KeyWordMatch.java

CompanySet.java

package com.example.zyk97.infotest.Activity;

import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListPopupWindow;
import android.widget.TextView;
import android.widget.Toast;

import com.example.zyk97.infotest.R;
import com.example.zyk97.infotest.Utils.KeyWordMatch;

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

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;

public class CompanySet extends AppCompatActivity {


    @BindView(R.id.back)
    Button back;
    @BindView(R.id.confirm)
    Button confirm;
    @BindView(R.id.my_company)
    TextView myCompany;
    @BindView(R.id.input)
    EditText inputCompany;
    @BindView(R.id.set)
    Button setCompany;
    private List<String> list=new ArrayList<>();
   // private static String[] matchList = {"格力", "海尔", "美的", "小米", "讯飞"};
    private List<String> matchList=new ArrayList<>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.companyset);
        ButterKnife.bind(this);
        list.add("海尔");
        list.add("格力");
        list.add("美的");
        list.add("讯飞");
        list.add("大疆");
        list.add("奎格");
        showListPopWindow();
    }

    @OnClick(R.id.back)
    public void setBack(View view) {
        finish();
    }

    @OnClick(R.id.confirm)
    public void setConfirm(View view) {
        finish();
    }

    @OnClick(R.id.my_company)
    public void resetMyCompany() {
        myCompany.setText("我的公司:未设置");
    }

    //显示提示词
    public void showListPopWindow() {
        final ListPopupWindow listPopupWindow = new ListPopupWindow(this);
        final ArrayAdapter adapter = new ArrayAdapter<>(this, R.layout.companyitem, matchList);
        listPopupWindow.setAdapter(adapter);//设置适配器，使用默认的适配器
        listPopupWindow.setAnchorView(inputCompany);//设置listpopowindow和哪个控件相邻
        listPopupWindow.setModal(true);//指定listpopwindow是否阻止在显示的时候将内容输入其他窗口


        listPopupWindow.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                inputCompany.setText(matchList.get(position));
                listPopupWindow.dismiss();//如果已经选择，隐藏listpopwindow
            }
        });
        inputCompany.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                if (inputCompany.getText().toString().length() > 0) {
                    setCompany.setBackgroundColor(getColor(R.color.dark_blue));
                    KeyWordMatch keyWordMatch = new KeyWordMatch();

                    List<String> ml = keyWordMatch.getMatch(list,s.toString());
                    matchList.clear();
                    matchList.addAll(ml);
                    adapter.notifyDataSetChanged();
                    listPopupWindow.show();
                }
            }

            @Override
            public void afterTextChanged(Editable s) {
                if (inputCompany.getText().toString().length() == 0) {
                    setCompany.setBackgroundColor(getColor(R.color.gray2));
                }
            }
        });
    }

    @OnClick(R.id.set)
    public void setMyCompany(View view) {
        myCompany.setText(inputCompany.getText());
    }

    @OnClick(R.id.business1)
    public void showBusiness1(View view) {
        AlertDialog.Builder builder = new AlertDialog.Builder(CompanySet.this);
        builder.setTitle("家电行业公司");
        final String[] cities = {"青岛海尔", "格力电器", "美的集团"};
        builder.setItems(cities, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                myCompany.setText(cities[which]);
            }
        });
        builder.show();
    }

    @OnClick(R.id.business2)
    public void showBusiness2(View view) {
        Toast.makeText(CompanySet.this, "行业待开通！", Toast.LENGTH_SHORT).show();
    }

    @OnClick(R.id.business3)
    public void showBusiness3(View view) {
        Toast.makeText(CompanySet.this, "行业待开通！", Toast.LENGTH_SHORT).show();
    }

    @OnClick(R.id.business4)
    public void showBusiness4(View view) {
        Toast.makeText(CompanySet.this, "行业待开通！", Toast.LENGTH_SHORT).show();
    }

}

companyset.xml

<?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">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:background="@color/dark_blue">

        <Button
            android:id="@+id/back"
            android:layout_width="20dp"
            android:layout_height="20dp"
            android:layout_marginLeft="15dp"
            android:layout_gravity="center"
            android:background="@mipmap/back"
            android:textColor="@color/black"
            android:layout_weight="0.01"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:text="公司设置"
            android:textColor="@color/white"
            android:gravity="center"
            android:layout_weight="1"/>

        <Button
            android:id="@+id/confirm"
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:layout_gravity="center"
            android:layout_marginRight="15dp"
            android:layout_weight="0.01"
            android:background="@color/transparent"
            android:textSize="13sp"
            android:textColor="@color/white"
            android:text="确定"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="80dp"
        android:gravity="center">
        <TextView
            android:id="@+id/my_company"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/transparent"
            android:gravity="center"
            android:textSize="20dp"
            android:textStyle="bold"
            android:textColor="@color/black"
            android:text="我的公司:未设置"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:gravity="center">

        <com.example.zyk97.infotest.Utils.ClearEditText
            android:id="@+id/input"
            android:layout_width="300dp"
            android:layout_height="45dp"
            android:gravity="center_vertical"
            android:paddingLeft="5dp"
            android:drawableLeft="@mipmap/searchcompany"
            android:background="@drawable/button_setting"
            android:hint="请输入公司名称"
            android:textSize="15sp"/>
        <Button
            android:id="@+id/set"
            android:layout_width="80dp"
            android:layout_height="45dp"
            android:text="设置"
            android:stateListAnimator="@null"
            android:textColor="@color/white"
            android:background="@color/gray2"/>
    </LinearLayout>
    <TextView
        android:layout_width="380dp"
        android:layout_height="50dp"
        android:gravity="center_vertical"
        android:layout_gravity="center_horizontal"
        android:text="按行业查找"/>
    <GridLayout
        android:layout_width="380dp"
        android:layout_height="match_parent"
        android:layout_gravity="center_horizontal"
        android:orientation="horizontal"
        android:columnCount="2"
        android:rowCount="2">
        <Button
            android:id="@+id/business1"
            android:layout_width="180dp"
            android:layout_height="50dp"
            android:layout_marginBottom="20dp"
            android:layout_marginRight="20dp"
            android:stateListAnimator="@null"
            android:text="家电"
            android:textColor="@color/white"
            android:background="@color/dark_blue"/>
        <Button
            android:id="@+id/business2"
            android:layout_width="180dp"
            android:layout_height="50dp"
            android:background="@color/light_blue"
            android:stateListAnimator="@null"
            android:text="食品"
            android:textColor="@color/white"/>
        <Button
            android:id="@+id/business3"
            android:layout_width="180dp"
            android:layout_height="50dp"
            android:background="@color/light_blue"
            android:stateListAnimator="@null"
            android:text="家具"
            android:textColor="@color/white"/>
        <Button
            android:id="@+id/business4"
            android:layout_width="180dp"
            android:layout_height="50dp"
            android:background="@color/light_blue"
            android:stateListAnimator="@null"
            android:text="汽车"
            android:textColor="@color/white"/>
    </GridLayout>

</LinearLayout>

companyitem.xml

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

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/company_item"
    android:layout_width="match_parent"
    android:layout_height="40dp"
    android:layout_margin="20dp"
    android:text="default"
    android:paddingLeft="15dp"
    android:textColor="@color/black"
    android:gravity="center_vertical"
    android:textSize="18sp" />

KeyWordMatch.java

package com.example.zyk97.infotest.Utils;

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

public class KeyWordMatch {
    public void KeyEordMatch() {
    }

    ;

    /**
     * @param list 主串数组list
     * @param sub  字串
     * @return 返回一个匹配完成的数组list
     */
    public List<String> getMatch(List<String> list, String sub) {
        List<String> matchList = new ArrayList<>();
        for (int i = 0; i <list.size(); i++) {
            if (list.get(i).contains(sub)) {
                matchList.add(list.get(i));
            }
        }
        return matchList;
    }
}

本文样例完整代码InfoTest

利用Adapter动态刷新数据实现联想词提示

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