同步firestore回调需要在Android自动补全文本视图中加载

// 导入必要的库和包
import android.os.Bundle;
import android.text.TextWatcher;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {
    private AutoCompleteTextView autoCompleteTextView;
    private ArrayAdapter<String> adapter;

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

        // 初始化Firestore
        // 参考文档：https://cloud.tencent.com/document/product/1591/62021
        Firestore firestore = Firestore.getInstance();

        // 创建AutoCompleteTextView
        autoCompleteTextView = findViewById(R.id.autoCompleteTextView);

        // 实现自动补全逻辑
        adapter = new ArrayAdapter<>(this, android.R.layout.simple_dropdown_item_1line);
        autoCompleteTextView.setAdapter(adapter);

        // 添加文本视图监听器
        autoCompleteTextView.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) {
            }

            @Override
            public void afterTextChanged(Editable s) {
                // 获取用户输入的文本
                String userInput = s.toString();

                // 使用Firestore查询获取匹配的文本建议
                // 参考文档：https://cloud.tencent.com/document/product/1591/60407
                Query query = firestore.collection("suggestions")
                        .whereGreaterThanOrEqualTo("text", userInput)
                        .limit(10);

                query.get().addOnCompleteListener(task -> {
                    if (task.isSuccessful()) {
                        List<String> suggestions = new ArrayList<>();
                        for (DocumentSnapshot document : task.getResult()) {
                            String suggestionText = document.getString("text");
                            suggestions.add(suggestionText);
                        }

                        // 更新自动补全视图
                        adapter.clear();
                        adapter.addAll(suggestions);
                        adapter.notifyDataSetChanged();
                    } else {
                        Log.e("Firestore", "Error getting suggestions: " + task.getException());
                    }
                });
            }
        });
    }
}