使用存储访问框架创建文件夹

// 导入必要的类和库
import androidx.documentfile.provider.DocumentFile;
import android.provider.DocumentsContract;

// 请求存储访问权限
private static final int REQUEST_CODE_STORAGE_PERMISSION = 1;

private void requestStoragePermission() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
            != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this,
                new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
                REQUEST_CODE_STORAGE_PERMISSION);
    } else {
        openStorageAccessFramework();
    }
}

// 打开存储访问框架
private static final int REQUEST_CODE_OPEN_DOCUMENT_TREE = 2;

private void openStorageAccessFramework() {
    Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
    startActivityForResult(intent, REQUEST_CODE_OPEN_DOCUMENT_TREE);
}

// 处理返回结果
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == REQUEST_CODE_OPEN_DOCUMENT_TREE && resultCode == RESULT_OK) {
        Uri treeUri = data.getData();
        createFolder(treeUri, "New Folder");
    }
}

// 创建文件夹
private void createFolder(Uri treeUri, String folderName) {
    DocumentFile pickedDir = DocumentFile.fromTreeUri(this, treeUri);
    DocumentFile newFolder = pickedDir.createDirectory(folderName);
    if (newFolder != null) {
        // 文件夹创建成功
    } else {
        // 文件夹创建失败
    }
}