在片段android中的CursorLoader中显示进度对话框

private void showProgressDialog() {
    if (mProgressDialog == null) {
        mProgressDialog = new ProgressDialog(getActivity());
        mProgressDialog.setMessage("Loading...");
        mProgressDialog.setIndeterminate(true);
    }
    mProgressDialog.show();
}

private void hideProgressDialog() {
    if (mProgressDialog != null && mProgressDialog.isShowing()) {
        mProgressDialog.dismiss();
    }
}

@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
    showProgressDialog();
    return new CursorLoader(getActivity(),
            YourContentProvider.CONTENT_URI,
            null,
            null,
            null,
            null);
}

@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
    // 处理加载完成后的逻辑
    hideProgressDialog();
}

@Override
public void onLoaderReset(Loader<Cursor> loader) {
    // 处理重置加载器的逻辑
}

@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    getLoaderManager().initLoader(0, null, this);
}