package com.unity.filepicker;

import android.app.Fragment;
import android.content.Intent;
import android.os.Bundle;

/**
 * 透明的Fragment，用于监听Activity结果
 */
public class FilePickerFragment extends Fragment {
    
    private FilePickerResultCallback callback;
    
    public interface FilePickerResultCallback {
        void onActivityResult(int requestCode, int resultCode, Intent data);
    }
    
    public void setCallback(FilePickerResultCallback cb) {
        this.callback = cb;
    }
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 保留实例，避免配置变化时Fragment被销毁
        setRetainInstance(true);
    }
    
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        
        if (callback != null) {
            callback.onActivityResult(requestCode, resultCode, data);
        }
        
        // 从Activity中移除Fragment
        try {
            getFragmentManager().beginTransaction().remove(this).commit();
        } catch (Exception e) {
            // 忽略移除错误
        }
    }
}