由网友(凉梦)分享简介：我知道这些类型的问题已经在这里，但我依然没有找到我对这个问题的回答是：I know these types of question have already been here but still I have not found my answer for this question:在我创建已创建的程序自动在应...

我知道这些类型的问题已经在这里，但我依然没有找到我对这个问题的回答是：

I know these types of question have already been here but still I have not found my answer for this question:

在我创建已创建的程序自动在应用程序（AndroidStudio）的应用程序，并用抽屉式导航

下面是我有：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mNavigationDrawerFragment = (NavigationDrawerFragment)
            getFragmentManager().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 by replacing fragments
    FragmentManager fragmentManager = getFragmentManager();
    fragmentManager.beginTransaction()
            .replace(R.id.container, PlaceholderFragment.newInstance(position + 1))
            .commit();
}

public void onSectionAttached(int number) {
    switch (number) {
        case 1:

            break;
        case 2:

            break;
        case 3:

            break;
    }
}

和一些在这里：

    public static PlaceholderFragment newInstance(int sectionNumber) {
        PlaceholderFragment fragment = new PlaceholderFragment();
        Bundle args = new Bundle();
        args.putInt(ARG_SECTION_NUMBER, sectionNumber);
        fragment.setArguments(args);
        return fragment;
    }

    public PlaceholderFragment() {
    }

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

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        ((MainActivity) activity).onSectionAttached(
                getArguments().getInt(ARG_SECTION_NUMBER));
    }
}

我想用的按钮抽屉式导航显示另一个片段。我想用这个code所以，请不要给我任何指导或教程制作自己的抽屉。

I want to display another fragment using the button in navigation drawer. I want to use this code so please do not send me any guides or tutorials making their own drawers..

现在的问题是，把什么案例1： 案例2：和案例3：的情况下，我想打开另一个片段？ 感谢名单。

The question is, what to put in case 1: case 2: and case 3: in case I want to open another fragment? Thanx.

还有一个问题：

我如何增加更多的碎片和交易？ 这不能正常工作 -

How do I add more fragments and transactions? This doesn't work-

Fragment fragment = new MyFragment1();
Fragment frag = new MyFragment2();
FragmentManager fragmentManager = getFragmentManager();
switch(position) {
    case 0:
        fragment = new MyFragment1();
        break;
    case 1:
        frag = new MyFragment2();

        break;
}
fragmentManager.beginTransaction()
        .replace(R.id.container, fragment).commit();

}

推荐答案

您应该只是把一个switch语句插入 onNavigationDrawerItemSelected 方法。

You should just put a switch statement into the onNavigationDrawerItemSelected method.

这样的事情应该工作：

public void onNavigationDrawerItemSelected(int position) {
    // update the main content by replacing fragments
    Fragment fragment;
    FragmentManager fragmentManager = getFragmentManager(); // For AppCompat use getSupportFragmentManager
    switch(position) {
        default:
        case 0:
            fragment = new MyFragment1();
            break;
        case 1:
            fragment = new MyFragment2();
            break;
    }
    fragmentManager.beginTransaction()
        .replace(R.id.container, fragment)
        .commit();
}

这是刚刚完成的很快，但我认为它应该工作

This is just done quickly but I think it should work