Hey there! Let's tackle that frustrating checkbox selection issue you're facing. The core problem here is that the default multipleChoice mode for ListView ties selection states to list positions, not the actual data items. When you filter the list with SearchView, the positions of items shift, so the selection gets misaligned with the wrong items.

Here's a solid, scalable fix that binds selection to the item content itself—perfect for your 200+ item use case:

Step 1: Use a HashSet to Track Selected Items #

Instead of relying on position-based selection, we'll store the actual text of selected items in a HashSet (it's faster than an ArrayList for checking if an item exists, which is ideal for large datasets).

Step 2: Customize the ArrayAdapter to Control Checkbox State #

We'll override the adapter's getView method to set the checkbox state based on whether the item is in our selected set, not the list position.

Step 3: Handle Item Clicks to Update Selections #

We'll manually manage item clicks to add/remove items from our selected set and refresh the adapter.

Step 4: Remove Default Choice Mode #

Since we're handling selection ourselves, we'll remove the android:choiceMode="multipleChoice" attribute from the ListView to avoid conflicts.

Modified Code #

StorageActivity.java

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.SearchView;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.CheckedTextView;
import android.widget.ListView;
import java.util.HashSet;

public class StorageActivity extends AppCompatActivity {
    ListView listView;
    String[] spices = {"Ajowan","Anis","Annatto","Bergkümmel","Betram","Brotklee","Eberraute","Essigbaum","Harissa","Herbes","Ingwer","Knoblauch","Koriander","Mandel"};
    SearchView searchView;
    HashSet<String> selectedItems = new HashSet<>(); // Use HashSet for fast lookups
    ArrayAdapter<String> arrayAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_storage);
        listView = findViewById(R.id.lvspices);
        
        // Custom ArrayAdapter to control checkbox state
        arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_multiple_choice, spices) {
            @NonNull
            @Override
            public View getView(int position, View convertView, @NonNull android.view.ViewGroup parent) {
                View view = super.getView(position, convertView, parent);
                CheckedTextView checkedTextView = (CheckedTextView) view;
                String currentItem = getItem(position);
                // Set checkbox state based on our selected set
                checkedTextView.setChecked(selectedItems.contains(currentItem));
                return view;
            }
        };
        
        listView.setAdapter(arrayAdapter);
        
        // Handle item clicks to update selected items
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                String item = arrayAdapter.getItem(position);
                if (selectedItems.contains(item)) {
                    selectedItems.remove(item);
                } else {
                    selectedItems.add(item);
                }
                // Refresh the adapter to update checkbox states
                arrayAdapter.notifyDataSetChanged();
            }
        });
        
        searchView = findViewById(R.id.search_spices);
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                arrayAdapter.getFilter().filter(query);
                return false;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                arrayAdapter.getFilter().filter(newText);
                return false;
            }
        });
    }
}

activity_storage.xml (Updated ListView)

Remove the android:choiceMode="multipleChoice" attribute from your ListView:

<ListView
    android:id="@+id/lvspices"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/beige"
    tools:listitem="@layout/support_simple_spinner_dropdown_item"/>

How This Works #

• HashSet Tracking: Every time an item is clicked, we add/remove its text from the selectedItems set. This keeps track of exactly which items are selected, regardless of their position in the list.
• Custom getView: When the list is drawn (including after filtering), each item's checkbox state is set based on whether it's in the selectedItems set—so even if an item moves to position 0 after filtering, its selection state stays tied to its content.
• No Position Dependency: We've completely decoupled selection from list positions, so filtering, sorting, or reordering the list won't break the selection state.

This solution is efficient even for 200+ items, as HashSet has O(1) time complexity for add/remove/contains operations.

内容的提问来源于stack exchange，提问作者Willi