片段方法不获取调用 [英] Fragment methods are not getting called
本文介绍了片段方法不获取调用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已实施的抽屉式导航中给出的 Android的工作室1.5.1 。
- 我有5个与片段他们每个人的抽屉式导航栏项目。每个片段都有分享的方法（不常见）。
- 在第一个抽屉式导航项目的片段，可以说 OldStory片段，我有Viewpager由3个片段与FragmentStatePagerAdapter刷卡视图。它具有共享的方法。
问题
- 从份额法的故事片段获取调用，即使其他片段显示在屏幕上每一次。调试后，我才知道从的故事片段获取调用该方法。
- 如果我禁用OldStory片段，然后一切工作正常。
我无法解决这个问题。我看了这么多问题/答案，但它们都涉及到活动和片段的方法。请帮我解决这个问题。
注意 - OldStory 片段具有延伸FragmentStatePagerAdapter类内部类。这个类创建许多故事片段。其他实现一样。
公共类OldStory扩展片段{私人StoryPagerAdapter storyPagerAdapter;
私人InfiniteViewPager viewPager;
共享preferences共享preferences;
私人诠释TOTALCOUNT;公共OldStory（）{
//必需的空公共构造
}@覆盖
公共无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
//通知系统，使该片段的选项菜单。}@覆盖
公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，
捆绑savedInstanceState）{
//充气的布局该片段
最后查看rootView = inflater.inflate（R.layout.fragment_old_story，集装箱，FALSE）;
viewPager =（InfiniteViewPager）rootView.findViewById（R.id.pager）;
viewPager.setOffscreenPageLimit（0）;
。共享preferences = getActivity（）getShared preferences（启动preferenceSETTINGS，Context.MODE_PRIVATE）;
TOTALCOUNT =共享preferences.getInt（Startup.StoryCount，4）;
storyPagerAdapter =新StoryPagerAdapter（getFragmentManager（））;
PagerAdapter wrappedAdapter =新InfinitePagerAdapter（storyPagerAdapter）;
viewPager.setAdapter（wrappedAdapter）;
viewPager.setCurrentItem（TOTALCOUNT-1）; 返回rootView;
}公共类StoryPagerAdapter扩展FragmentStatePagerAdapter {
公共StoryPagerAdapter（FragmentManager FM）{
超（FM）;
} @覆盖
公共片段的getItem（INT位置）{ 返回Story.newInstance（位置+ 1）;
} @覆盖
公众诠释的getCount（）{
返回TOTALCOUNT;
}
}
}
故事片段方式实现 -
@覆盖
公共无效onCreateOptionsMenu（菜单菜单，MenuInflater气筒）{ menu.clear（）;
inflater.inflate（R.menu.story，菜单）;
。getActivity（）getMenuInflater（）膨胀（R.menu.main，菜单）;
}
@覆盖
公共布尔onOptionsItemSelected（菜单项项）{
开关（item.getItemId（））{
案例R.id.Refresh：
//我们确保了SwipeRefreshLayout正在显示它的清爽指标
如果（！可视性）{
如果（！RefreshLayout.isRefreshing（））{
ErrorLayout.setVisibility（View.GONE）;
RefreshLayout.setRefreshing（真）;
} //开始我们的刷新后台任务
initiateRequest（今天）;
}
返回true; 案例R.id.Share：
// InShort =共享preferences.getString（Startup.InShort，NULL）;
Toast.makeText（的getContext（），故事，Toast.LENGTH_SHORT）.show（）;
如果（InShort = NULL＆放大器;！＆安培;！InShort.isEmpty（））
{ 意图sendIntent =新意图（Intent.ACTION_SEND）;
sendIntent.putExtra（Intent.EXTRA_TEXT，喜从故事）;
sendIntent.setType（text / plain的）;
startActivity（sendIntent）;
} 返回true; 默认：
返回super.onOptionsItemSelected（项目）;
}
}
MainActivity 用于切换片段。
公共布尔onNavigationItemSelected（菜单项项）{
//处理导航视图项点击这里。
displayView（item.getItemId（））; 返回true;
}//方法以替换content_main在ID = content_frame意见
公共无效displayView（INT viewID）
{
片段= NULL;
标题=的getString（R.string.app_name）; 开关（viewID）
{
案例R.id.nav_frag0：
片段=新OldStory（）;
标题=的getString（R.string.story）;
viewIsAtHome = TRUE;
打破; 案例R.id.nav_frag1：
片段=新片段1（）;
标题=的getString（R.string.fragment1）;
viewIsAtHome = FALSE;
打破; 案例R.id.nav_frag2：
片段=新Fragment2（）;
标题=的getString（R.string.fragment2）;
viewIsAtHome = FALSE;
打破; 案例R.id.nav_frag3：
片段=新Fragment3（）;
标题=的getString（R.string.fragment3）;
viewIsAtHome = FALSE;
打破; 案例R.id.nav_frag4：
片段=新Fragment4（）;
viewIsAtHome = FALSE;
标题=的getString（R.string.fragment4）;
打破; 案例R.id.nav_share：
片段=新Fragment5（）;
标题=的getString（R.string.fragment5）;
viewIsAtHome = FALSE;
打破; } 如果（片段！= NULL）
{
FragmentTransaction英尺= getSupportFragmentManager（）调用BeginTransaction（）。
ft.replace（R.id.content_frame，片段）;
ft.commit（）;
} //设置工具栏标题
如果（getSupportActionBar（）！= NULL）
{
getSupportActionBar（）的setTitle（职称）。
} DrawerLayout抽屉=（DrawerLayout）findViewById（R.id.drawer_layout）;
drawer.closeDrawer（GravityCompat.START）;
}
解决方案
我不知道这是否是真正的回答你的问题，但我在你的code注意到有一个错误：
storyPagerAdapter =新StoryPagerAdapter（getFragmentManager（））;
将无法正常具有因你需要使用<一个工作href=\"http://developer.android.com/reference/android/support/v4/app/Fragment.html#getChildFragmentManager%28%29\"相对=nofollow> getChildFragmentManager（）到片段中管理片段。
I have implemented Navigation drawer given in the Android Studio 1.5.1.
- I have 5 navigation drawer items with a fragment to each of them. Each Fragment has Share method (Not common).
- Inside 1st Navigation drawer item's fragment lets say OldStory Fragment, I am having Swipe view with Viewpager consisting 3 fragments with FragmentStatePagerAdapter. It has Share method.
Problem - Share Method from Story Fragment is getting called every time even when other fragment is shown on screen. After debugging I came to know that method from Story fragment is getting called. - If I disable OldStory Fragment then everything works fine.
I am unable to solve this problem. I read so many Question/answers but they are related to Activity and Fragment methods. Please help me to solve this problem.
Note - OldStory fragment has inner class that extends FragmentStatePagerAdapter class. This class creates Many Story Fragments. Other implementation is same.
public class OldStory extends Fragment {
private StoryPagerAdapter storyPagerAdapter;
private InfiniteViewPager viewPager;
SharedPreferences sharedPreferences;
private int TotalCount;
public OldStory() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Notify the system to allow an options menu for this fragment.
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
final View rootView = inflater.inflate(R.layout.fragment_old_story, container, false);
viewPager = (InfiniteViewPager) rootView.findViewById(R.id.pager);
viewPager.setOffscreenPageLimit(0);
sharedPreferences = getActivity().getSharedPreferences(Startup.PreferenceSETTINGS, Context.MODE_PRIVATE);
TotalCount = sharedPreferences.getInt(Startup.StoryCount, 4);
storyPagerAdapter = new StoryPagerAdapter(getFragmentManager());
PagerAdapter wrappedAdapter = new InfinitePagerAdapter(storyPagerAdapter);
viewPager.setAdapter(wrappedAdapter);
viewPager.setCurrentItem(TotalCount-1);
return rootView;
}
public class StoryPagerAdapter extends FragmentStatePagerAdapter {
public StoryPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
return Story.newInstance(position+1);
}
@Override
public int getCount() {
return TotalCount;
}
}
}
Story Fragment method Implementation -
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
menu.clear();
inflater.inflate(R.menu.story, menu);
getActivity().getMenuInflater().inflate(R.menu.main, menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.Refresh:
// We make sure that the SwipeRefreshLayout is displaying it's refreshing indicator
if(!visiblity) {
if (!RefreshLayout.isRefreshing()) {
ErrorLayout.setVisibility(View.GONE);
RefreshLayout.setRefreshing(true);
}
// Start our refresh background task
initiateRequest(Today);
}
return true;
case R.id.Share:
//InShort = sharedPreferences.getString(Startup.InShort, null);
Toast.makeText(getContext(), "Stories", Toast.LENGTH_SHORT).show();
if (InShort!= null && !InShort.isEmpty())
{
Intent sendIntent = new Intent(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT, "Hi From Story");
sendIntent.setType("text/plain");
startActivity(sendIntent);
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
MainActivity used for switching fragments.
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
displayView(item.getItemId());
return true;
}
//method to replace Views in ID = content_frame in content_main
public void displayView(int viewID)
{
fragment = null;
title = getString(R.string.app_name);
switch (viewID)
{
case R.id.nav_frag0:
fragment = new OldStory();
title = getString(R.string.story);
viewIsAtHome = true;
break;
case R.id.nav_frag1:
fragment = new Fragment1();
title = getString(R.string.fragment1);
viewIsAtHome = false;
break;
case R.id.nav_frag2:
fragment = new Fragment2();
title = getString(R.string.fragment2);
viewIsAtHome = false;
break;
case R.id.nav_frag3:
fragment = new Fragment3();
title = getString(R.string.fragment3);
viewIsAtHome = false;
break;
case R.id.nav_frag4:
fragment = new Fragment4();
viewIsAtHome = false;
title = getString(R.string.fragment4);
break;
case R.id.nav_share:
fragment = new Fragment5();
title = getString(R.string.fragment5);
viewIsAtHome = false;
break;
}
if (fragment != null)
{
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.content_frame,fragment);
ft.commit();
}
//set the toolbar title
if(getSupportActionBar() != null)
{
getSupportActionBar().setTitle(title);
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
}
解决方案
I am not sure if it is really the answer to your question, but I noticed one error in your code:
storyPagerAdapter = new StoryPagerAdapter(getFragmentManager());
will not work correctly becasuse you need to use getChildFragmentManager() to manage fragments within fragments.
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