Android编程，ListView图像在SearchView查询期间和之后消失

Question

尝试在搜索视图中查询搜索后，我尝试使用其各自的图标重新显示列表视图的原始值时遇到问题。ListView 首先显示带有图标的项目，但在尝试搜索时和之后消失。非常感谢您的帮助，谢谢。

主活动.java

package com.example.asus.sdssuanhandbookapplication;
import android.os.Bundle;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.SearchView;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    MySimpleAdapter adapter;
    ListView listView;
    String[] items;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listView = (ListView) findViewById(R.id.list_view_article);
        items = getResources().getStringArray(R.array.article_list);
        adapter = new MySimpleAdapter(this, items);
        listView.setAdapter(adapter);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                String text = listView.getItemAtPosition(position).toString();
                Toast.makeText(MainActivity.this, "" + text, Toast.LENGTH_SHORT).show();
            }
        });
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu_search, menu);
        MenuItem searchItem = menu.findItem(R.id.item_search);
        SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextChange(String newText) {
                ArrayList<String> templist = new ArrayList<>();
                for (String temp : items) {
                    if (temp.toLowerCase().contains(newText.toLowerCase())) {
                        templist.add(temp);
                    }
                }
                ArrayAdapter<String> adapter = new ArrayAdapter<>(MainActivity.this,
                        android.R.layout.simple_list_item_1, templist);
                listView.setAdapter(adapter);

                return false;
            }
            @Override
            public boolean onQueryTextSubmit(String query) {
                return false;
            }
        });
        return super.onCreateOptionsMenu(menu);
    }

}

我的简单适配器.java

package com.example.asus.sdssuanhandbookapplication;
import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
/**
 * Created by asus on 2/9/2017.
 */
public class MySimpleAdapter extends BaseAdapter {
    private final Activity context;
    private final String[] names;
    int[] imgs = {R.drawable.icn1,
            R.drawable.icn2,
            R.drawable.icn3,
            R.drawable.icn4,
            R.drawable.icn5,
            R.drawable.icn6,
            R.drawable.icn7,
            R.drawable.icn8,
            R.drawable.icn9,
            R.drawable.icn10,
            R.drawable.icn11,
            R.drawable.icn12,
            R.drawable.icn13,
            R.drawable.icn14,
            R.drawable.icn15,
            R.drawable.icn16,
            R.drawable.icn17,
            R.drawable.icn18,
            R.drawable.icn19,
            R.drawable.icn20,
            R.drawable.icn21,
            R.drawable.icn22
    };

    static class ViewHolder{
        public TextView text;
        public ImageView image;
    }
    public MySimpleAdapter(Activity context, String[] names) {
        this.context = context;
        this.names = names;
    }
    @Override
    public int getCount() {
        return names.length;
    }
    @Override
    public Object getItem(int position) {
        return names[position];
    }
    @Override
    public long getItemId(int position) {
        return 0;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View rowView = convertView;

        if (rowView == null){
            LayoutInflater inflater = context.getLayoutInflater();
            rowView = inflater.inflate(R.layout.row_layout, null);
            //Configure view holder
            ViewHolder viewHolder = new ViewHolder();
            viewHolder.text = (TextView) rowView.findViewById(R.id.articleTxt);
            viewHolder.image = (ImageView) rowView.findViewById(R.id.articleImage);
            rowView.setTag(viewHolder);
        }
        ViewHolder holder = (ViewHolder) rowView.getTag();
        String s = names[position];
        int icon = imgs[position];
        holder.text.setText(s);
        holder.text.setTextSize(13);
        holder.image.setImageResource(icon);
        return rowView;
    }
}

row_layout.xml

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

    <ImageView
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:layout_margin="10dp"
        android:id="@+id/articleImage"
        android:src="@drawable/icn1"/>
    <TextView
        android:layout_marginTop="15dp"
        android:layout_marginRight="20dp"
        android:text="title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20dp"
        android:id="@+id/articleTxt"/>

</LinearLayout>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.asus.sdssuanhandbookapplication.MainActivity">
    <ListView
        android:id="@+id/list_view_article"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
</RelativeLayout>

以下是应用程序过程的实际镜头：

这是应用程序首次打开时的原始列表视图显示

然后，当尝试在搜索上查询时，并显示相同的图标消失

Answer 1

在

main 中像这样更改代码

import android.os.Bundle;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.SearchView;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    MySimpleAdapter adapter;
    ListView listView;
    String[] items;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listView = (ListView) findViewById(R.id.list_view_article);
        items = getResources().getStringArray(R.array.article_list);
        adapter = new MySimpleAdapter(this, items, null);
        listView.setAdapter(adapter);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                String text = listView.getItemAtPosition(position).toString();
                Toast.makeText(MainActivity.this, "" + text, Toast.LENGTH_SHORT).show();
            }
        });
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu_search, menu);
        MenuItem searchItem = menu.findItem(R.id.item_search);
        SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextChange(String newText) {
                ArrayList<String> tempList = new ArrayList<>();
                int[] indexs = new int[items.lenght];
                int j = 0;
                for (int i = 0; i < items.length; i++) {

                    if (items[i].toLowerCase().contains(newText.toLowerCase())) {
                        // getting String data
                        tempList.add(items[i]);
                        // getting index for images
                        indexs[j] = i;
                        j++;
                    }
                }
                // MySimpleAdapter with 3 parameters
                adapter = new MySimpleAdapter(MainActivity.this, tempList.toArray(new String[tempList.size()]), indexs);
                listView.setAdapter(adapter);

                return false;
            }
            @Override
            public boolean onQueryTextSubmit(String query) {
                return false;
            }
        });
        return super.onCreateOptionsMenu(menu);
    }

}

和 MySimpleAdapter

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class MySimpleAdapter extends BaseAdapter {
    private final Activity context;
    private final String[] names;
    private final int[] indexs;
    int[] imgs = {R.drawable.icn1,
            R.drawable.icn2,
            R.drawable.icn3,
            R.drawable.icn4,
            R.drawable.icn5,
            R.drawable.icn6,
            R.drawable.icn7,
            R.drawable.icn8,
            R.drawable.icn9,
            R.drawable.icn10,
            R.drawable.icn11,
            R.drawable.icn12,
            R.drawable.icn13,
            R.drawable.icn14,
            R.drawable.icn15,
            R.drawable.icn16,
            R.drawable.icn17,
            R.drawable.icn18,
            R.drawable.icn19,
            R.drawable.icn20,
            R.drawable.icn21,
            R.drawable.icn22
    };

    static class ViewHolder {
        public TextView text;
        public ImageView image;
    }
    public MySimpleAdapter(Activity context, String[] names, int[] indexs) {
        this.context = context;
        this.names = names;
        this.indexs = indexs;
    }
    @Override
    public int getCount() {
        return names.length;
    }
    @Override
    public Object getItem(int position) {
        return names[position];
    }
    @Override
    public long getItemId(int position) {
        return 0;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View rowView = convertView;

        if (rowView == null) {
            LayoutInflater inflater = context.getLayoutInflater();
            rowView = inflater.inflate(R.layout.row_layout, null);
            //Configure view holder
            ViewHolder viewHolder = new ViewHolder();
            viewHolder.text = (TextView) rowView.findViewById(R.id.articleTxt);
            viewHolder.image = (ImageView) rowView.findViewById(R.id.articleImage);
            rowView.setTag(viewHolder);
        }
        ViewHolder holder = (ViewHolder) rowView.getTag();
        String s = names[position];
        int icon;
        if(indexs == null) {
           icon = imgs[position];
        }
        else{
           icon = imgs[indexs[position]];
        }
        holder.text.setText(s);
        holder.text.setTextSize(13);
        holder.image.setImageResource(icon);
        return rowView;
    }
}

Answer 2

首先，

当创建列表视图时，您正在使用MySimpleAdapter 当搜索发生时，您正在调用不同的ArrayAdapeter图像的id在MySimpleAdapter的id中。 您将无法使用这些图像