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我编写了一个带有片段的Android应用程序。一个ListView片段和一个细节片段。 我想要做的是，如果有人点击细节活动内部，“View.Gone”的布局应该是“View.Visible”。该代码工作没有错误，但屏幕上没有任何更改。 您可以在ImageButton btn上的clik事件所在的细节代码中看到它。 我错了什么？更新细节布局的片段
什么是更新详细信息屏幕的最佳方法？如果有人有一个小例子或者可以写我在哪里，在我的代码我必须要改变什么，这让我很开心:-) 非常感谢 汤姆
的FragmentActivity：
public class CacheFragment extends SherlockFragmentActivity {
CacheListFragment f;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list_cachelist);
f = new CacheListFragment();
// Supply index input as an argument.
Bundle args = new Bundle();
f.setArguments(args);
}
下面是详细信息片段，在这里你可以看到，如果有人点击ImageButton的热点问题研究应该发生：
public class CacheDetailsFragment extends SherlockFragment implements OnClickListener {
private CacheDetailsLoading cdLoad= new CacheDetailsLoading();
private static GeocacheDetails _cacheDetails = new GeocacheDetails();
private static GCRatingTyp _cacheVote = new GCRatingTyp();
private CacheDetailsUsing cdUsing = new CacheDetailsUsing();
private Activity _context;
private static CacheDetailsFragment f;
private View view;
/**
* Create a new instance of DetailsFragment, initialized to
* show the text at 'index'.
*/
public static CacheDetailsFragment newInstance(int index) {
f = new CacheDetailsFragment();
// Supply index input as an argument.
Bundle args = new Bundle();
args.putInt("index", index);
f.setArguments(args);
return f;
}
public int getShownIndex() {
return getArguments().getInt("index", 0);
}
public void setCacheDetail(GeocacheDetails cacheDetails)
{
_cacheDetails = cacheDetails;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (container == null) {
return null;
}
Bundle bundle=getArguments();
_cacheVote= bundle.getParcelable("cacheVote");
int index = bundle.getInt("index");
_cacheDetails=StaticCacheListByGroup.getCacheList().get(index);
_context = getActivity();
_context.setTheme(R.style.Theme_Sherlock_Light_DarkActionBar);
view = inflater.inflate(R.layout.list_cachedetails, container,false);
((RelativeLayout) view.findViewById(R.id.relativeLoggingInfo)).setVisibility(View.GONE);
((RelativeLayout) view.findViewById(R.id.relativeKategorienInfo)).setVisibility(View.GONE);
ImageButton btn = (ImageButton) view.findViewById(R.id.description_expand);
btn.setOnClickListener(new OnClickListener() {
public void onClick(View v)
{
if(((RelativeLayout) getActivity().findViewById(R.id.relativeDescriptionInfo)).getVisibility() == View.GONE)
{
((ImageButton) getActivity().findViewById(R.id.description_expand)).setBackgroundResource(R.drawable.navigation_collapse_dark);
((RelativeLayout) getActivity().findViewById(R.id.relativeDescriptionInfo)).setVisibility(View.VISIBLE);
}
else
{
((ImageButton) getActivity().findViewById(R.id.description_expand)).setBackgroundResource(R.drawable.navigation_expand_dark);
((RelativeLayout) getActivity().findViewById(R.id.relativeDescriptionInfo)).setVisibility(View.GONE);
}
});
return view;
}
}
现在Listfragment：
public class CacheListFragment extends SherlockListFragment {
boolean isDualPane;
int mCurCheckPosition = 0;
private CacheListArrayAdapter _adapter;
private SharedPrefs _sp= new SharedPrefs();
private double latitude=0;
private double longitude=0;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
latitude =Double.parseDouble(_sp.getSharedPrefs(getActivity(), LibraryDefaults.PROGRAMMNAME, "Latitude", "0"));
longitude =Double.parseDouble(_sp.getSharedPrefs(getActivity(), LibraryDefaults.PROGRAMMNAME, "Longitude", "0"));
// Check to see if we have a frame in which to embed the details
// fragment directly in the containing UI.
View detailsFrame = getActivity().findViewById(R.id.details);
isDualPane = detailsFrame != null && detailsFrame.getVisibility() == View.VISIBLE;
if(!isDualPane)
{
Bundle bundle = getActivity().getIntent().getExtras();
if(bundle != null && bundle.containsKey("Titel"))
((TextView) getActivity().findViewById(R.id.listtitle)).setText(bundle.getString("Titel"));
else
((TextView) getActivity().findViewById(R.id.listtitle)).setText(this.getResources().getString(R.string.caches_listtitle));
}
if (StaticCacheListByGroup.getCacheList() != null)
{
GeocachingCompass gc = new GeocachingCompass(getActivity());
_adapter = new CacheListArrayAdapter(getActivity(), StaticCacheListByGroup.getCacheList(), longitude,latitude);
_adapter.setActualCoordinates(new LatLng(latitude,longitude));
_adapter.setActualHeading(gc.getBearing(latitude,longitude));
if (_adapter != null)
setListAdapter(_adapter);
if (savedInstanceState != null) {
// Restore last state for checked position.
mCurCheckPosition = savedInstanceState.getInt("curChoice", 0);
}
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
getListView().setSoundEffectsEnabled(true);
getListView().setSmoothScrollbarEnabled(true);
getListView().setDrawSelectorOnTop(false);
getListView().setCacheColorHint(R.color.transparentBlack);
getListView().setDivider(getResources().getDrawable(R.color.divider));
getListView().setDividerHeight(5);
if (isDualPane) {
// In dual-pane mode, the list view highlights the selected item.
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
showDetails(mCurCheckPosition);
}
}
}
@Override
public void onResume() {
super.onResume();
GeocachingCompass gc = new GeocachingCompass(getActivity());
_adapter = new CacheListArrayAdapter(getActivity(), StaticCacheListByGroup.getCacheList(), longitude,latitude);
_adapter.setActualCoordinates(new LatLng(latitude,longitude));
_adapter.setActualHeading(gc.getBearing(latitude,longitude));
if (_adapter != null)
setListAdapter(_adapter);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("curChoice", mCurCheckPosition);
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
showDetails(position);
}
/**
* Helper function to show the details of a selected item, either by
* displaying a fragment in-place in the current UI, or starting a
* whole new activity in which it is displayed.
*/
void showDetails(int index) {
mCurCheckPosition = index;
ReadGCVote getVote = new ReadGCVote();
GeocacheDetails cacheDetails = new GeocacheDetails();
cacheDetails=StaticCacheListByGroup.getCacheList().get(index);
if (isDualPane) {
// We can display everything in-place with fragments, so update
// the list to highlight the selected item and show the data.
getListView().setItemChecked(index, true);
// Check what fragment is currently shown, replace if needed.
CacheDetailsFragment details = (CacheDetailsFragment)
getActivity().getSupportFragmentManager().findFragmentById(R.id.details);
if (details == null || details.getShownIndex() != index) {
// Make new fragment to show this selection.
details = CacheDetailsFragment.newInstance(index);
// Execute a transaction, replacing any existing fragment
// with this one inside the frame.
FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction();
ft.replace(R.id.details, details);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
} else {
// Otherwise we need to launch a new activity to display
Intent intent = new Intent();
intent.setClass(getActivity(), CacheDetailsActivity.class);
intent.putExtra("index", index);
intent.putExtra("cacheDetails",cacheDetails);
intent.putExtra("cacheVote",getVote.getGCVoteByCacheGuid(StaticGCVoteList.getCacheList(), cacheDetails.GetGUID()));
startActivity(intent);
}
}
}