import java.io.File;
import java.util.ArrayList;
import java.util.List;
 
public class FileUtils {
    // 獲取指定目錄下的所有文件列表（不遞歸子目錄）
    public static List<File> getFiles(String path) {
        List<File> fileList = new ArrayList<>();
        File dir = new File(path);
        if (dir.exists() && dir.isDirectory()) {
            File[] files = dir.listFiles();
            if(files != null) {
                for (File file : files) {
                    if (file.isFile()) {
                        fileList.add(file);
                    }
                }
            }
        }
        return fileList;
    }
}

import java.io.File;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
 
public class FileSorter {
    // 升序排序（舊文件在前，新文件在后）
    public static void sortFilesByTime(List<File> files) {
        Collections.sort(files, new Comparator<File>() {
            @Override
            public int compare(File f1, File f2) {
                long time1 = f1.lastModified();
                long time2 = f2.lastModified();
                return Long.compare(time1, time2);
            }
        });
    }
}

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.recyclerview.widget.RecyclerView;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.List;
import java.util.Locale;
 
public class FileAdapter extends RecyclerView.Adapter<FileAdapter.FileViewHolder> {
    private List<File> fileList;
    private SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault());
 
    public FileAdapter(List<File> fileList) {
        this.fileList = fileList;
    }
 
    @Override
    public FileViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(android.R.layout.simple_list_item_2, parent, false);
        return new FileViewHolder(view);
    }
 
    @Override
    public void onBindViewHolder(FileViewHolder holder, int position) {
        File file = fileList.get(position);
        holder.text1.setText(file.getName());
        holder.text2.setText("修改時間: " + sdf.format(file.lastModified()));
    }
 
    @Override
    public int getItemCount() {
        return fileList.size();
    }
 
    class FileViewHolder extends RecyclerView.ViewHolder {
        TextView text1, text2;
        public FileViewHolder(View itemView) {
            super(itemView);
            text1 = itemView.findViewById(android.R.id.text1);
            text2 = itemView.findViewById(android.R.id.text2);
        }
    }
}

import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import java.io.File;
import java.util.List;
 
public class FileListActivity extends AppCompatActivity {
    private RecyclerView recyclerView;
    private FileAdapter fileAdapter;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_file_list);
 
        recyclerView = findViewById(R.id.recyclerView);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
 
        // 指定需要顯示的目錄路徑
        String path = "/sdcard/YourFolder";
        List<File> files = FileUtils.getFiles(path);
        FileSorter.sortFilesByTime(files);
 
        fileAdapter = new FileAdapter(files);
        recyclerView.setAdapter(fileAdapter);
    }
}