在片段中使用asynctask加载带有进度条的数据库

public class LoadDatabaseTask extends AsyncTask<Void, Integer, Void> {
    private ProgressBar progressBar;
    private Context context;

    public LoadDatabaseTask(ProgressBar progressBar, Context context) {
        this.progressBar = progressBar;
        this.context = context;
    }

    @Override
    protected void onPreExecute() {
        progressBar.setVisibility(View.VISIBLE);
    }

    @Override
    protected Void doInBackground(Void... voids) {
        // 加载数据库的操作，例如使用SQLite数据库的相关API来加载数据
        // 可以在这里使用数据库查询、插入等操作来加载数据

        // 模拟加载过程，更新进度条的进度
        for (int i = 0; i <= 100; i += 10) {
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            publishProgress(i);
        }

        return null;
    }

    @Override
    protected void onProgressUpdate(Integer... values) {
        progressBar.setProgress(values[0]);
    }

    @Override
    protected void onPostExecute(Void aVoid) {
        progressBar.setVisibility(View.GONE);
        // 加载完成后的逻辑处理，例如更新UI界面上的其他控件、显示加载结果等
    }
}

public class MyFragment extends Fragment {
    private ProgressBar progressBar;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_layout, container, false);
        progressBar = view.findViewById(R.id.progress_bar);
        return view;
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        LoadDatabaseTask loadDatabaseTask = new LoadDatabaseTask(progressBar, getContext());
        loadDatabaseTask.execute();
    }
}