小编Arn*_*ain的帖子

我正在尝试按照以下步骤将Parse-1.5.1.jar文件导入到我的Android Studio项目中: - 文件 - >项目结构 - 单击加号按钮并单击导入.JAR或.AAR包 - 选择我的jar文件然后点击完成

但是,然后识别来自解析库的任何命令.例如:"无法解析符号ParseObject",android studio不建议我导入任何东西.

我无法在stackoverflow上找到这些版本的Android studio和Parse的任何指令.

有什么建议吗？

我在Android Studio中实现导航抽屉时有点迷失.onCreate方法调用了PlaceholderFragment我不太了解它的类.

但无论如何,根据导航抽屉中选择的项目,我应该在哪里实现我onItemClickListener的显示fragments？

这是我目前的PlaceholderFragment:

public static class PlaceholderFragment extends Fragment {

    private ListView listView;
    private CustomAdapter expenseAdapter;

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main, container, false);

        expenseAdapter = new CustomAdapter(getActivity());

        listView = (ListView) rootView.findViewById(R.id.lvExpense);
        listView.setAdapter(expenseAdapter);
        expenseAdapter.loadObjects();
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
                String expense = expenseAdapter.getItem(position).get("title").toString();
                Toast.makeText(getActivity(), expense, Toast.LENGTH_SHORT).show();
            }
        });

        return rootView;
    } …

我正在寻找一种在我的导航抽屉中找到默认片段的方法,这不是第0项.我已经看到一些解决方案基于检查savedInstanceState是否为null但我觉得我没有访问权限这在我的onNavigationDrawerItemSelected方法中.这是我的班级:

public class Main extends ActionBarActivity
    implements NavigationDrawerFragment.NavigationDrawerCallbacks {

/**
 * Fragment managing the behaviors, interactions and presentation of the navigation drawer.
 */
private NavigationDrawerFragment mNavigationDrawerFragment;

/**
 * Used to store the last screen title. For use in {@link #restoreActionBar()}.
 */
private CharSequence mTitle;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mNavigationDrawerFragment = (NavigationDrawerFragment)
            getSupportFragmentManager().findFragmentById(R.id.navigation_drawer);
    mTitle = getTitle();

    // Set up the drawer.
    mNavigationDrawerFragment.setUp(
            R.id.navigation_drawer,
            (DrawerLayout) findViewById(R.id.drawer_layout));
}

@Override
public void onNavigationDrawerItemSelected(int position) {
    // update the Main content …