正如我previous question中提到的那样，我在Fragments r中显示ViewPage后，在Fragment内的Fragments之一中显示ViewPager时遇到了一些问题。 add()。
我设法通过在FragmentTransaction中使用ActionBar来解决问题。不幸的是，这会产生另一个问题：
我在我的应用中使用Fragments。当我选择相同的菜单项两次时遇到与以前相同的问题，它在ViewPager内没有显示任何public class HomePageActivity extends SherlockFragmentActivity implements ICallback {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private SherlockActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
private String[] mChampionsMenuItems;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTheme(R.style.Theme_Sherlock);
setContentView(R.layout.activity_home_page);
mTitle = mDrawerTitle = getTitle();
mChampionsMenuItems = getResources().getStringArray(R.array.champions_array);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
mDrawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_list_item, mChampionsMenuItems));
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setBackgroundDrawable(getResources().getDrawable(R.color.navy_blue));
getSupportActionBar().setDisplayShowTitleEnabled(false);
mDrawerToggle = new SherlockActionBarDrawerToggle(this, mDrawerLayout, R.drawable.menu_icon, R.string.drawer_open, R.string.drawer_close) {
public void onDrawerClosed(View view) {
getSupportActionBar().setTitle(mTitle);
supportInvalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getSupportActionBar().setTitle(mDrawerTitle);
supportInvalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
onFragmentChange(new HomeActivityFragment(), true);
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
switch (item.getItemId()) {
default: return super.onOptionsItemSelected(item);
}
}
private class DrawerItemClickListener implements ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
}
}
private void selectItem(int position) {
switch (position) {
case 0:
onFragmentChange(new Fragment1(), false);
break;
case 1:
onFragmentChange(new Fragment2(), false);
break;
case 2:
onFragmentChange(new MyPointFragment3(), false);
break;
case 3:
// onFragmentChange(new HomeActivityFragment(), true);
break;
case 4:
onFragmentChange(new QueriesFragment(), false);
break;
case 5:
onFragmentChange(new GalleryFragment(), false);
break;
default:
break;
}
mDrawerList.setItemChecked(position, true);
mDrawerLayout.closeDrawer(mDrawerList);
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getSupportActionBar().setTitle(mTitle);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public void onFragmentChange(Fragment fragment, boolean flag) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.add(R.id.content_frame, fragment, fragment.getClass().getName());
transaction.commit();
}
}
。
家庭活动代码（点击活动的操作栏被调用）
Fragment这是ViewPager，其中包含public class Fragment1 extends Fragment implements OnClickListener {
ICallback callback;
private LinearLayout headerContainer;
private ImageView headerLogo;
private TextView headerName;
private Button menuBarButton;
MyAdapter adapter;
ViewPager pager;
ActionBar actionBar;
private Button progOverview, progStr, bonusPoint;
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
if (activity instanceof ICallback) {
this.callback = (ICallback) activity;
}
actionBar = activity.getActionBar();
actionBar.show();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = setUpView(inflater, container);
return rootView;
}
private View setUpView(LayoutInflater inflater, ViewGroup container) {
View rootView = inflater.inflate(R.layout.fragment_about_champions_club, container, false);
headerContainer = (LinearLayout) rootView.findViewById(R.id.second_top_header);
headerContainer.setBackgroundColor(getResources().getColor(R.color.prog_str_blue));
headerLogo = (ImageView) rootView.findViewById(R.id.header_logo);
headerLogo.setBackgroundResource(R.drawable.about_champions_ticon);
headerName = (TextView) rootView.findViewById(R.id.header_name);
headerName.setText(R.string.about_champ_title);
adapter = new MyAdapter(getFragmentManager());
pager = (ViewPager) rootView.findViewById(R.id.pager);
pager.setAdapter(adapter);
return rootView;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (savedInstanceState != null) {
// Restore last state for checked position.
}
}
}
}
：
Fragments这是ViewPager中的public class ProgramOverViewFragment extends Fragment {
ICallback callback;
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
if (activity instanceof ICallback) {
this.callback = (ICallback) activity;
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_program_overview, container, false);
TextView termsAndCond = (TextView) rootView.findViewById(R.id.terms_and_condition_button);
termsAndCond.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.content_frame, fragment);
fragment.setRetainInstance(true);
transaction.addToBackStack(null);
transaction.commit();
}
});
return rootView;
}
}
之一：
FragmentStatePagerAdapter我的public class MyAdapter extends FragmentStatePagerAdapter {
public MyAdapter(FragmentManager fm) {
super(fm);
}
@Override
public android.support.v4.app.Fragment getItem(int index) {
switch (index) {
case 0: return new ProgramOverViewFragment();
case 1: return new ProgramStructureFragment();
case 2: return new BonusPointFragment();
}
return null;
}
@Override
public int getCount() {
return 3;
}
}
：
{{1}}
感谢您的帮助！
答案 0 :(得分：1)
你想做什么？您是否尝试在ViewPager中替换Fragment？或者您是否尝试在ViewPager中的片段内替换片段？或者你想要做一些完全不同的事情？如果你详细解释你想要做什么，我只能给你一个准确的解决方案。无论如何，这是我猜测可能是错误的：
我认为您的问题是您使用了错误的FragmentManager。有多种不同的FragmentManagers，但基本上有两种情况：
Fragment Activity
Fragment Fragment
只要我看不到您的布局文件，我就无法确定这两个选项中哪一个适合您的情况。
如果您想在另一个FragmentTransaction内的Fragment内执行Fragment，则需要使用该子FragmentManager！您可以像FragmentManager一样使用Fragment内的孩子：
FragmentManager fragmentManager = getChildFragmentManager();
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.content_frame, fragment);
fragment.setRetainInstance(true);
transaction.addToBackStack(null);
transaction.commit();
如您所见，您只需使用getChildFragmentManager()代替getSupportFragmentManager()
正如我已经说过的，如果没有关于你情况的任何进一步信息，我无法给你一个更准确的答案。所以请尽量向我解释你想做什么，我相信我们可以解决这个问题。
答案 1 :(得分：0)
最后，我发现我的代码中出错了：
我使用下面的代码为片段内的视图寻呼机设置适配器：
adapter = new MyAdapter(getFragmentManager());
pager = (ViewPager) rootView.findViewById(R.id.pager);
pager.setAdapter(adapter);
并将getFragmentManager()替换为getChildFragmentManager()即可解决此问题。根据我的理解，我在片段中使用了view pager，这就是为什么我必须使用getChildFragment管理器来存储我的viewPager的转换。
可能这有助于某人和这个问题仍然是开放的更好的解决方案。