如何使用Android导航抽屉来更改片段

我知道这些types的问题已经在这里，但我仍然没有find我对这个问题的答案：

• 我创build了一个应用程序，并使用由应用程序（AndroidStudio）创build的AUTOMATICLLY的导航抽屉，

这是我有：

@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; } } 

还有一些在这里：

  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)); } } 

我想要使​​用导航抽屉中的button显示另一个片段。 我想使用这个代码，所以请不要给我任何指导或教程制作自己的抽屉。

问题是， case 1: case 2:和case 3:如果我想打开另一个片段？ 感谢名单。

还有一个问题：

• 我如何添加更多的碎片和交易？ 这不起作用 –

   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(); 

  }

Answer 1

你应该把一个switch语句放到onNavigationDrawerItemSelected方法中。

像这样的东西应该工作：

 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(); } 

这只是快速完成，但我认为它应该工作

Answer 2

我通过inflater解决了这个问题：

  @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView; switch(getArguments().getInt(ARG_SECTION_NUMBER)) { case 1: rootView = inflater.inflate(R.layout.fragment_obj_detail, container, false); break; case 2: rootView = inflater.inflate(R.layout.fragment_obj_list, container, false); break; case 3: rootView = inflater.inflate(R.layout.fragment_obj_list, container, false); break; case 4: rootView = inflater.inflate(R.layout.fragment_about, container, false); break; default: rootView = inflater.inflate(R.layout.fragment_obj_list, container, false); } return rootView; } 

Answer 3

您需要在onNavigationDrawerItemSelected( ）中创build一个switch块，并使用已经存在的代码来处理每种case但使用对应的Fragment而不是PlaceholderFragment 。 现在它包含一个通用的代码片段，用于将PlaceholderFragment添加到布局，并将其重用于您的目的。

Answer 4

DenisGl的回应是正确的！ 使用默认创build的类成员，您可以在导航抽屉的各个组件之间切换！ 您必须使用类成员PlaceholderFragment中的onCreateView方法。 这个类将在方法onNavigationDrawerItemSelected中被自动调用

这里是代码示例：/ 这个方法可以保持原样！ 它会自动调用类PlaceholderFragment！ /

 @Override public void onNavigationDrawerItemSelected(int position) { // update the main content by replacing fragments FragmentManager fragmentManager = getSupportFragmentManager(); fragmentManager.beginTransaction() .replace(R.id.container, PlaceholderFragment.newInstance(position + 1)) .commit(); } 

这种方法，而是在你进入开关柜的地方 ：

 @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = null; rootView = inflater.inflate(R.layout.fragment_home, container, false); switch(getArguments().getInt(ARG_SECTION_NUMBER)) { case 1: rootView = inflater.inflate(R.layout.fragment_home, container, false); break; case 2: //rootView = inflater.inflate(R.layout.fragment_obj_list, container, false); break; case 3: //rootView = inflater.inflate(R.layout.fragment_obj_list, container, false); break; case 4: rootView = inflater.inflate(R.layout.fragment_info, container, false); break; } return rootView; } 

显然，你必须调用每个我们感兴趣的片段的布局！

这工作100％，testingvalidation！

Answer 5

它在Eclipse IDE中工作

  switch(getArguments().getInt(ARG_SECTION_NUMBER)) { case 1: rootView = inflater.inflate(R.layout.fragment_home, container, false); break; case 2: //rootView = inflater.inflate(R.layout.fragment_obj_list, container, false); break; case 3: //rootView = inflater.inflate(R.layout.fragment_obj_list, container, false); break; case 4: rootView = inflater.inflate(R.layout.fragment_info, container, false); break; } 

function

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