的ListView去上攻，當它在滑動底部的Android

Question

你好，我是新手，Android和一個列表視圖演示的工作，我最近發現列表視圖的怪異行爲，當我把它的滾動下來它有力地談到上攻，任何人可以告訴我這種行爲背後的原因是什麼。我在這裏發佈我的代碼。

活動

package one.tusk.stush.fragments; 

import android.content.Intent; 
import android.os.Bundle; 
import android.support.v4.app.LoaderManager; 
import android.support.v4.content.Loader; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.Menu; 
import android.view.MenuInflater; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.AbsListView; 
import android.widget.AbsListView.OnScrollListener; 
import android.widget.ImageView; 
import android.widget.ListView; 
import android.widget.ProgressBar; 
import android.widget.TextView; 

import com.company.stush.R; 

import java.util.List; 

import one.tusk.stush.SearchPostActivity; 
import one.tusk.stush.adapters.TimelineAdapter; 
import one.tusk.stush.connect.Post; 
import one.tusk.stush.loaders.SearchPostsLoader; 
import uk.co.senab.actionbarpulltorefresh.library.ActionBarPullToRefresh; 
import uk.co.senab.actionbarpulltorefresh.library.PullToRefreshLayout; 
import uk.co.senab.actionbarpulltorefresh.library.listeners.OnRefreshListener; 

public class SearchPostsFragment extends BaseFragment implements LoaderManager.LoaderCallbacks<List<Post>>, OnRefreshListener, OnScrollListener { 

    public static android.widget.PopupMenu popupMenu; 
    private int index = -1; 
    private int top = 0; 
    TimelineAdapter mTimelineAdapter; 
    SearchPostsLoader mTimelineLoader; 
    PullToRefreshLayout mPullToRefreshLayout; 
    ListView mListViewTimeline; 
    ProgressBar mProgressBarLoading; 
    TextView mTextViewNoItems; 
    ImageView im; 
    Menu mm; 
    int total; 

    int lastPosition; 
    int lastTop; 
    String search; 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     search = getArguments().getString("search"); 

     ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_timeline_other, container, false); 
     setHasOptionsMenu(false); 
     return rootView; 
    } 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 

     super.onCreate(savedInstanceState); 
     setHasOptionsMenu(false); 
    } 

    public void onResume() { 

     super.onResume(); 
     getActivity().invalidateOptionsMenu(); 

     mListViewTimeline.setSelectionFromTop(
       lastPosition, 
       lastTop 
     ); 


//  if(index!=-1){ 
//   mListViewTimeline.setSelectionFromTop(index, top); 
//  } 
     setHasOptionsMenu(false); 



    } 

    @Override 
    public void onStop() { 
     super.onStop(); 


     lastPosition = mListViewTimeline.getFirstVisiblePosition(); 
     View v = mListViewTimeline.getChildAt(0); 
     lastTop = (v == null) ? 0 : v.getTop(); 

//  lastPosition = mListViewTimeline.getSelectedItemPosition(); 
//  int lastPositionInGroup = lastPosition - mListViewTimeline.getFirstVisiblePosition(); 
//  lastTop = mListViewTimeline.getChildAt(lastPositionInGroup).getTop(); 
    } 


    @Override 
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 
     super.onCreateOptionsMenu(menu, inflater); 
     getActivity().getMenuInflater().inflate(R.menu.search_post, menu); 
     //MenuItem refreshItem = menu.findItem(R.id.action_edit); 
     //refreshItem.setVisible(true); 

     //inflater.inflate(R.menu.fragment_profile_menu, menu); 
    } 



    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     if (id == R.id.search22) { 
      // Log.d("MyApp", "action bar clicked"); 


      Intent intent = new Intent(getActivity(), SearchPostActivity.class); 
      intent.putExtra("View_mode", true); 
      startActivity(intent); 

     } 

     return super.onOptionsItemSelected(item); 
    } 


    @Override 
    public void onActivityCreated (Bundle savedInstanceState) { 

     super.onActivityCreated(savedInstanceState); 
     total = 0; 
     mPullToRefreshLayout = (PullToRefreshLayout) getActivity().findViewById(R.id.ptr_layout); 
     ActionBarPullToRefresh.from(getActivity()).allChildrenArePullable().listener(this).setup(mPullToRefreshLayout); 

     mProgressBarLoading = (ProgressBar) getActivity().findViewById(R.id.progressBarLoading); 
     mTextViewNoItems = (TextView) getActivity().findViewById(R.id.textViewNoItems); 

     mTimelineAdapter = new TimelineAdapter(getActivity()); 



     mListViewTimeline = (ListView) getActivity().findViewById(R.id.listViewTimeline); 
     mListViewTimeline.setTranscriptMode(ListView.TRANSCRIPT_MODE_ALWAYS_SCROLL); 
     mListViewTimeline.setEmptyView(mProgressBarLoading); 
     mListViewTimeline.setAdapter(mTimelineAdapter); 

     mListViewTimeline.setOnScrollListener(this); 

     // mListViewTimeline.setTranscriptMode(ListView.TRANSCRIPT_MODE_ALWAYS_SCROLL); 
     mListViewTimeline.setVerticalScrollBarEnabled(false); 
     getLoaderManager().initLoader(0, null, this); 

    } 

    @Override 
    public Loader<List<Post>> onCreateLoader(int id, Bundle args) { 

     mTimelineLoader = new SearchPostsLoader(getActivity(), mListViewTimeline, search); 
     setHasOptionsMenu(false); 
     return mTimelineLoader; 
    } 

    @Override 
    public void onLoadFinished(Loader<List<Post>> arg0, List<Post> data) { 

     mTimelineAdapter.setData(data); 
     mTimelineAdapter.notifyDataSetChanged(); 


     mPullToRefreshLayout.setRefreshComplete(); 
     mTextViewNoItems.setVisibility(View.VISIBLE); 
     mProgressBarLoading.setVisibility(View.INVISIBLE); 
     mListViewTimeline.setEmptyView(mTextViewNoItems); 

    } 


    @Override 
    public void onLoaderReset(Loader<List<Post>> arg0) { 

     mTimelineAdapter.setData(null); 
     setHasOptionsMenu(false); 
    } 

    @Override 
    public void onRefreshStarted(View view) { 

     getLoaderManager().destroyLoader(0); 
     getLoaderManager().initLoader(0, null, this); 
     mTextViewNoItems.setVisibility(View.INVISIBLE); 
     mProgressBarLoading.setVisibility(View.VISIBLE); 
     mListViewTimeline.setEmptyView(mProgressBarLoading); 


    } 

    @Override 
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { 

     if (firstVisibleItem + visibleItemCount >= totalItemCount && visibleItemCount != 0) { 
      if (mTimelineLoader.loadMore() && !mTimelineLoader.loading()) { 
       total = totalItemCount - 1; 
       lastPosition = view.getFirstVisiblePosition(); 
       View v = view.getChildAt(0); 
       lastTop = (v == null) ? 0 : v.getTop(); 
       mTimelineLoader.onContentChanged(); 

      } 


     } 


    } 

    @Override 
    public void onScrollStateChanged(AbsListView view, int scrollState) { 

    } 

    public void searchPost(String query) 
    { 



     search = query; 
     lastPosition = 0; 
     lastTop = 0; 
     mTimelineAdapter.clear(); 
     // mTimelineLoader.loadInBackground(); 
     Log.d("12","UPDATE"); 
     getLoaderManager().restartLoader(0, null, this); 

    } 
} 

適配器

package one.tusk.stush.adapters; 

import android.content.Context; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ArrayAdapter; 

import com.company.stush.R; 

import java.util.List; 

import one.tusk.stush.connect.Post; 
import one.tusk.stush.views.PostListItem; 

public class TimelineAdapter extends ArrayAdapter<Post> { 

    private final LayoutInflater mInflater; 


    public TimelineAdapter(Context context) { 

     super(context, R.layout.list_item_post); 
     mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    } 



    public void setData(List<Post> data) { 
     setNotifyOnChange(true); 
     clear(); 
     if (data != null) { 
      addAll(data); 
      notifyDataSetChanged(); 
     } 
     notifyDataSetChanged(); 
    } 


    @Override 
    public View getView(final int position, View convertView, ViewGroup parent) { 

     Post post = getItem(position); 
     PostListItem view; 
     if (convertView == null) { 
      view = (PostListItem) mInflater.inflate(R.layout.list_item_post, parent, false); 


     } else { 
      view = (PostListItem) convertView; 

     } 
     view.setPost(post); 
     notifyDataSetChanged(); 
     return view; 
    } 
} 

Answer 1

你可以試試這個，

更改代碼

  if(results.size() > 0){ 
       SearchAdapter searchAdapter = new SearchAdapter(SearchActivity.this); 
       searchAdapter.setData(results); 
       mListViewSearchUsers.setAdapter(searchAdapter); 
       textNotFound.setVisibility(View.GONE); 
      }else { 
       textNotFound.setVisibility(View.VISIBLE); 
       textNotFound.setText("No users found"); 
      } 

到

  if(results.size() > 0){ 
       SearchAdapter searchAdapter = new SearchAdapter(SearchActivity.this); 
        if (searchAdapter== null) { 
         searchAdapter.setData(results); 
         mListViewSearchUsers.setAdapter(searchAdapter); 
        } else { 
       searchAdapter.setData(results); 
       mListViewSearchUsers.notifyDatasetChange(); 
       } 
       textNotFound.setVisibility(View.GONE); 
      }else { 
       textNotFound.setVisibility(View.VISIBLE); 
       textNotFound.setText("No users found"); 
      } 

改變一些代碼在適配器（註釋一些代碼）

public void setData(List<User> data) { 
    // clear(); 
    if (data != null) { 
     addAll(data); 
     // notifyDataSetChanged(); 
    } 
    } 

更新：（由COMM ENT的解決了這個線的問題）

mListViewTimeline.setTranscriptMode（ListView.TRANSCRI PT_MODE_ALWAYS_SCROLL）;

我希望這會幫助你。