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點擊/觸摸無法在ListView上工作

2012-03-20 20 views
0

我已經使用ListView並將自定義的ArrayAdapter綁定到它。
已將setOnItemClickListener（...）綁定到它。
點擊/觸摸無法在ListView上工作

還有2個按鈕，'next'和'previous'。點擊每個按鈕我打電話給web服務，並根據收到的響應我更新適配器（並期望ListView得到更新。）

我的問題是，幾次下一次和以前的點擊後，Touch不能在ListView上工作。

已經投入很多時間了，請幫幫我。我的一個發現是：通常觀察到問題發生在GC後。

佈局代碼：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:background="@drawable/background" 
    android:orientation="vertical" > 
    <LinearLayout 
     android:id="@+id/layout1" 
     style="@style/TitleBar" 
     android:background="@drawable/top_bg" > 
     <TextView 
      android:id="@+id/search_result_titleTxt" 
      style="@style/TitleBarText" 
      android:paddingLeft="8dip" 
      android:text="@string/title_restaurants" /> 
     <ImageView 
      android:id="@+id/sep" 
      android:layout_width="1px" 
      android:layout_height="fill_parent" 
      android:layout_marginRight="7dip" 
      android:background="@drawable/seprator_img" /> 
     <ImageView 
      android:id="@+id/img1" 
      style="@style/TitleBarLogo" 
      android:background="@null" 
      android:onClick="onMapClick" 
      android:src="@drawable/map" /> 
     <ImageView 
      android:id="@+id/filterSep" 
      android:layout_width="1px" 
      android:layout_height="fill_parent" 
      android:layout_marginRight="7dip" 
      android:background="@drawable/seprator_img" /> 
     <ImageView 
      android:id="@+id/filter" 
      style="@style/TitleBarLogo" 
      android:background="@null" 
      android:onClick="onSearchClick" 
      android:src="@drawable/filter" /> 
    </LinearLayout> 
    <LinearLayout 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_weight="1" 
     android:background="@drawable/background" 
     android:padding="6dip" > 
     <LinearLayout 
      android:id="@+id/search_contentView" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:orientation="vertical" > 
      <TextView 
       android:id="@+id/search_result_countTxt" 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:focusable="false" 
       android:text="@string/total_restaurants" 
       android:textColor="#ffffff" 
       android:visibility="gone" /> 
      <ListView 
       android:id="@+id/search_result_list" 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:background="@layout/customshape_table" 
       android:cacheColorHint="#00000000" 
       android:divider="#BAC698" 
       android:dividerHeight="2px" 
       android:paddingLeft="4dip" 
       android:paddingRight="4dip" 
       android:scrollbars="none" /> 
      <LinearLayout 
       android:id="@+id/layout1" 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_alignParentBottom="true" 
       android:layout_marginTop="5dp" > 
       <ImageView 
        android:id="@+id/search_result_prevBtn" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_gravity="left" 
        android:layout_weight="1" 
        android:background="@null" 
        android:onClick="onPrevBtnClick" 
        android:src="@drawable/previous_btn" 
        android:visibility="gone" /> 
       <ImageView 
        android:id="@+id/search_result_nextBtn" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_gravity="right" 
        android:layout_weight="1" 
        android:background="@null" 
        android:gravity="right" 
        android:onClick="onNextBtnClick" 
        android:src="@drawable/next_btn" 
        android:visibility="gone" /> 
      </LinearLayout> 
     </LinearLayout> 
    </LinearLayout> 
    <HorizontalScrollView 
     android:id="@+id/bottomBar" 
     android:layout_width="fill_parent" 
     android:layout_height="55dip" 
     android:layout_alignParentBottom="true" 
     android:background="@drawable/bottom_bar" 
     android:scrollbarSize="2dip" 
     android:scrollbarThumbHorizontal="@drawable/scrollbar_horizontal_thumb" 
     android:scrollbarTrackHorizontal="@drawable/scrollbar_horizontal_track" > 
     <LinearLayout 
     ... 
     </LinearLayout> 
    </HorizontalScrollView>

適配器代碼：

public class LazyListAdapter extends ArrayAdapter<Resturant> { 

private ArrayList<Resturant> resturants; 
public ImageLoader imageLoader; 

Context context; 
int layoutResourceId; 

public LazyListAdapter(Context context, int layoutResourceId, 
     ArrayList<Resturant> resturants) { 
    super(context, layoutResourceId, resturants); 
    this.layoutResourceId = layoutResourceId; 
    this.context = context; 
    this.resturants = resturants; 
    imageLoader = new ImageLoader(context); 
    setNotifyOnChange(true); 
} 

public static class ViewHolder { 
    public TextView restaurantName; 
    public TextView address; 
    public TextView completeAddress; 
    public TextView cuisines; 
    public ImageView image; 
    ImageView offerImg; 
    ImageView freqImg; 
    TextView dinnerCountImg; 
    ImageView friDashImg; 
    ImageView friEveDashImg; 
    ImageView satDashImg; 
    ImageView satEveDashImg; 
    ImageView sunDashImg; 
    ImageView sunEveDashImg; 
    ImageView callImg; 
    TextView metricTxt; 
    TextView distanceTxt; 
    View overlay; 

} 

public View getView(int position, View convertView, ViewGroup parent) { 
    View vi = convertView; 
    ViewHolder holder; 
    if (convertView == null) { 
     System.out.println("pos:::::::::: " + position); 
     LayoutInflater inflater = ((Activity)context).getLayoutInflater(); 
        vi = inflater.inflate(layoutResourceId, parent, false); 
     holder = new ViewHolder(); 
     holder.restaurantName = (TextView) vi 
       .findViewById(R.id.search_item_restTitleTxt); 
     holder.address = (TextView) vi 
       .findViewById(R.id.search_item_addTxt); 
     holder.completeAddress = (TextView) vi 
       .findViewById(R.id.search_item_complete_addTxt); 
     holder.cuisines = (TextView) vi 
       .findViewById(R.id.search_item_cuisineTxt); 
     holder.image = (ImageView) vi.findViewById(R.id.search_item_image); 
     holder.offerImg = (ImageView) vi 
       .findViewById(R.id.search_item_specialOfferImg); 
     holder.freqImg = (ImageView) vi 
       .findViewById(R.id.search_item_frequencyImg); 
     holder.dinnerCountImg = (TextView) vi 
       .findViewById(R.id.search_item_dinnerCountTxt); 
     holder.friDashImg = (ImageView) vi 
       .findViewById(R.id.search_item_friDashImg); 
     holder.friEveDashImg = (ImageView) vi 
       .findViewById(R.id.search_item_friDashEveImg); 
     holder.satDashImg = (ImageView) vi 
       .findViewById(R.id.search_item_satDashImg); 
     holder.satEveDashImg = (ImageView) vi 
       .findViewById(R.id.search_item_satDashEveImg); 
     holder.sunDashImg = (ImageView) vi 
       .findViewById(R.id.search_item_sunDashImg); 
     holder.sunEveDashImg = (ImageView) vi 
       .findViewById(R.id.search_item_sunDashEveImg); 
     holder.callImg = (ImageView) vi 
       .findViewById(R.id.search_item_callImg); 
     holder.metricTxt = (TextView) vi 
       .findViewById(R.id.search_item_metricTxt); 
     holder.distanceTxt = (TextView) vi 
       .findViewById(R.id.search_item_distanceTxt); 
     holder.overlay = vi.findViewById(R.id.overlay); 

     vi.setTag(holder); 
    } else 
     holder = (ViewHolder) vi.getTag(); 

    holder.restaurantName.setText(getCustomText(resturants.get(position) 
      .getName())); 
    holder.address.setText(getCustomText(resturants.get(position) 
      .getAddress())); 
    holder.completeAddress.setText(getCustomText(resturants.get(position) 
      .getMergedAddress())); 
    holder.cuisines.setText(Html.fromHtml(getCustomText("<b>Cuisine: </b>" 
      + resturants.get(position).getCuisines()))); 
    imageLoader.DisplayImage(resturants.get(position).getImagePath(), 
      holder.image); 
    setAvalIcons(position, holder); 
    getDistance(position, holder); 

    if (resturants.get(position).getSpecialOffer() != null 
      && !resturants.get(position).getSpecialOffer() 
        .equals(StringConstants.EMPTY_STRING)) { 
     holder.overlay 
       .setBackgroundResource(R.drawable.specialoffers_strip); 
     holder.overlay.invalidate(); 
    } 
    return vi; 
} 

private void getDistance(int position, ViewHolder holder) { 
    Setting setting = ((AppDelegate) ((Activity)context).getApplication()) 
      .getSetting(); 
    Resturant resturant = resturants.get(position); 
    if (setting.getDistance() == 0) { 
     holder.metricTxt.setText("miles"); 
     holder.distanceTxt.setText(resturant.getLocation()); 
    } else { 
     holder.metricTxt.setText("kms"); 
     holder.distanceTxt.setText(resturant.getLocationInKm()); 
    } 
} 

public String getCustomText(String text) { 
    if (text.length() > 30) { 
     text = text.substring(0, 26); 
     text = text + "..."; 
    } 
    return text.toString(); 
} 

public void reSet(ArrayList<Resturant> resturantsCache) { 
    System.out.println("reSet(Resturant[] resturants) resturant :: " 
      + resturantsCache.size()); 
    this.resturants = resturants; 
    notifyDataSetChanged(); 
} 

private void setAvalIcons(int position, ViewHolder holder) { 
    Resturant resturant = resturants.get(position); 
    System.out.println("Special offer image Visibility :: " 
      + resturant.getSpecialIconsVisibility(0)); 
    System.out.println("Special offer image :: " + holder.offerImg); 
    holder.offerImg.setVisibility(resturant.getSpecialIconsVisibility(0)); 
    imageLoader.DisplayImage(resturant.getOfferImage(), holder.offerImg); 
    holder.freqImg.setVisibility(resturant.getSpecialIconsVisibility(1)); 
    if (resturant.getSpecialIconsVisibility(1) == View.VISIBLE) { 
     holder.freqImg.setImageResource(resturant 
       .getFrequencyImageDrawableId()); 
    } 
    holder.dinnerCountImg.setVisibility(resturant 
      .getSpecialIconsVisibility(2)); 
    holder.dinnerCountImg.setText(resturant.getDinersPerCard() + "D"); 
    holder.friDashImg.setVisibility(resturant.getSpecialIconsVisibility(3)); 
    holder.friEveDashImg.setVisibility(resturant 
      .getSpecialIconsVisibility(4)); 
    holder.satDashImg.setVisibility(resturant.getSpecialIconsVisibility(5)); 
    holder.satEveDashImg.setVisibility(resturant 
      .getSpecialIconsVisibility(6)); 
    holder.sunDashImg.setVisibility(resturant.getSpecialIconsVisibility(7)); 
    holder.sunEveDashImg.setVisibility(resturant 
      .getSpecialIconsVisibility(8)); 
    holder.callImg.setVisibility(resturant.getSpecialIconsVisibility(9)); 
} 

public void clearCache() { 
    imageLoader.clearCache(); 
} 

@Override 
public void clear() { 
    clearCache(); 
    super.clear(); 
} 
}

列表類別：

公共抽象類SearchResultAbstractActivity延伸活動實現 OnItemClickListener {

protected LazyListAdapter adapter; 
protected SearchResults searchResults; 
protected SearchCriteria searchCriteria; 
protected boolean isGuest = false; 
protected ProgressDialog dialog; 
protected String responseString; 
protected boolean isNew = false; 
protected boolean isFilter = false; 
private View contentView; 
protected static final String RETRIVE_RESTAURANTS = "RetriveRestaurants"; 
protected static final String DELETE_FAVOURITES = "DeleteFavourites"; 
protected static final String LOADING_MSG = "please wait\n\nloading restaurants..."; 
Handler mHandler = new Handler() { 

    public void handleMessage(android.os.Message msg) { 
     if (!isFinishing()) { 
      Bundle b = msg.getData(); 
      String action = b.getString(StringConstants.ACTION); 
      if (action.equalsIgnoreCase(RETRIVE_RESTAURANTS)) { 
       ... 
        ((AppDelegate) getApplication()) 
          .setSearchResults(searchResults); 
        ListView list = (ListView) findViewById(R.id.search_result_list); 
        if (searchResults.getTotalCount() == 0) { 
         ... 
        } else { 
         if (adapter == null) { 
          adapter = new LazyListAdapter(SearchResultAbstractActivity.this, R.layout.search_item, 
            searchResults.getResturantList()); 
          list.setAdapter(adapter); 
         } else { 
          if (list.getCount() > 0) { 
           list.setSelection(0); 
          } 
          adapter.reSet(searchResults.getResturantList()); 
          list.refreshDrawableState(); 
         } 

        } 
       } 
       ... 
     } 
     } 
    }; 
}; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 

    super.onCreate(savedInstanceState); 
    setContentView(R.layout.search_result); 

    Log.i("SearchResultActivity :: onStart() ", 
      " ==========================I'm in start ============================"); 

    isNew = true; 
    setTitle(); 
    ListView list = (ListView) findViewById(R.id.search_result_list); 
    registerForContextMenu(list); 

    list.setOnItemClickListener(this); 
} 

@Override 
public void onItemClick(AdapterView<?> parent, View view, int position, 
     long id) { 
     ... 
} 

@Override 
protected void onStart() { 
    super.onStart(); 
    ListView list = (ListView) findViewById(R.id.search_result_list); 
    boolean isSet = setSearchCriteria(); 
    AppDelegate appDelegate = (AppDelegate) getApplication(); 
    if (isSet && (isNew || isFilter || searchCriteria.isNew())) { 
     if (adapter != null) { 
      ImageView nextBtn = (ImageView) findViewById(R.id.search_result_nextBtn); 
      ImageView prevBtn = (ImageView) findViewById(R.id.search_result_prevBtn); 
      TextView countTxt = (TextView) findViewById(R.id.search_result_countTxt); 
      nextBtn.setVisibility(View.GONE); 
      prevBtn.setVisibility(View.GONE); 
      countTxt.setVisibility(View.GONE); 
      adapter.clear(); 
      list.getEmptyView(); 
      searchResults.setPageNo(1); 
      System.out 
        .println("%%%%%%%%%%%%%%%%%%% Ohhhhhhh %%%%%%%%%%%%%%%%%%%%%%%"); 
     } 
     getFilteredResturants(); 
     isFilter = false; 
     isNew = false; 
     searchCriteria.setNew(false); 
    } 

    if (list.getOnItemClickListener() == null) { 
     Log.e("%%%%%%%%%%%%%%%%%%% Started %%%%%%%%%%%%%%%%%%%%%%% ", 
       "" + list.getOnItemClickListener()); 
     list.setOnItemClickListener(this); 
    } 
} 

@Override 
protected void onDestroy() { 
    System.out.println("Hi I'm signing offfffff.........."); 
    if (adapter != null) { 
     adapter.clear(); 
    } 
    super.onDestroy(); 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    Intent previewIntend = new Intent(getApplicationContext(), 
      PreviewResturant.class); 
    ... 
    return true; 
} 

protected void setNextPrevVisibility() { 
    ImageView nextBtn = (ImageView) findViewById(R.id.search_result_nextBtn); 
    if (searchResults.isNext()) { 
     nextBtn.setVisibility(View.VISIBLE); 
    } else { 
     nextBtn.setVisibility(View.INVISIBLE); 
    } 

    ImageView prevBtn = (ImageView) findViewById(R.id.search_result_prevBtn); 
    if (searchResults.isPrev()) { 
     prevBtn.setVisibility(View.VISIBLE); 
    } else { 
     prevBtn.setVisibility(View.INVISIBLE); 
    } 
} 

public void onPrevBtnClick(View v) { 
    resetLastRestId(); 
    searchCriteria.setPrev(true); 
    getFilteredResturants(); 
    searchResults.onPrev(); 
} 

public void onNextBtnClick(View v) { 
    resetLastRestId(); 
    searchCriteria.setPrev(false); 
    getFilteredResturants(); 
    searchResults.onNext(); 
} 

protected void resetLastRestId() { 
    searchCriteria.setLastRestId(String.valueOf(searchResults.getResturant(
      searchResults.getResturantsCount() - 1).getId())); 
} 

protected void retriveResturants() { 

    if (dialog == null || dialog.isShowing() == false) { 

     if (((AppDelegate) getApplication()) 
       .isNetworkAvailable(SearchResultAbstractActivity.this)) { 

      AsyncTask<Void, Void, Void> tempTask = new AsyncTask<Void, Void, Void>() { 

       ProgressDialog dialog; 

       protected void onPreExecute() { 
        Log.i("SearchActivity", "onPreExecute()"); 
        dialog = MessageBox.showProgressDialog(
          SearchResultAbstractActivity.this, dialog, 
          LOADING_MSG); 
        dialog.setOnCancelListener(new DialogInterface.OnCancelListener() { 
         @Override 
         public void onCancel(DialogInterface dialog) { 
          cancel(true); 
         } 
        }); 

       } 

       @Override 
       protected Void doInBackground(Void... params) { 

        try { 
         setSearchResult(); 
        } catch (SocketException e) { 
         ... 
         cancel(true); 
        } catch (SocketTimeoutException e) { 
         ... 
         cancel(true); 
        } catch (Exception e) { 
         ... 
         cancel(true); 
        } 
        return null; 
       } 
       @Override 
       protected void onCancelled() { 
        super.onCancelled(); 
        if (dialog != null && dialog.isShowing()) { 
         dialog.cancel(); 
        } 
        Log.i("SearchResultAbstractActivity", "onCancelled()"); 
       } 

       protected void onPostExecute(Void result) { 
        Message message = new Message(); 
        Bundle b = new Bundle(); 
        b.putString(StringConstants.ACTION, RETRIVE_RESTAURANTS); 
        message.setData(b); 
        searchResults = JSONParser.parseResturants(
          responseString, searchResults); 
        mHandler.sendMessage(message); 
        if (dialog != null && dialog.isShowing()) { 
         dialog.dismiss(); 
        } 
       } 
      }; 
      tempTask.execute(); 

     } else { 
      MessageBox.showAlert(SearchResultAbstractActivity.this, 
        StringConstants.CONNECTION_ERROR_TITLE, 
        StringConstants.CONNECTION_ERROR_MESSAGE); 
     } 
    } else { 
     Log.e("dialog.isShowing() : dialog.isShowing() ", 
       "dialog.isShowing() " + dialog.isShowing()); 
    } 

} 

protected void setSearchResult() throws SoapFault, SocketException, 
     Exception { 
    responseString = getApiCallResponse(); 
} 

protected String getApiCallResponse() throws SoapFault, SocketException, 
     Exception { 
    // try { 
    return new SyncApiSoapCall(getApplicationContext(), 
      StringConstants.URL_RESTAURANTS, 
      StringConstants.METHOD_SEARCH_RESTAURANTS).callSearchApi(this, 
      searchCriteria); 
} 

@Override 
public void onCreateContextMenu(ContextMenu menu, View v, 
     ContextMenuInfo menuInfo) { 
     ... 
} 


@Override 
public boolean onContextItemSelected(MenuItem item) { 
    ... 
} 

@Override 
public void onContextMenuClosed(Menu menu) { 
    ... 
    super.onContextMenuClosed(menu); 
} 

private boolean getFilteredResturants() { 
    MyLocationListener locationListener = ((AppDelegate) getApplication()) 
      .getLocationListener(); 
    Setting setting = ((AppDelegate) getApplication()).getSetting(); 
    boolean isValid = false; 
    try { 
     if ((setting.getGps() == 1 || searchCriteria.isNearMe()) 
       && searchCriteria.getIsLwp() == 0 
       && searchCriteria.isFavourites() == false 
       && (locationListener.getLatitude().equals(
         StringConstants.DEFAULT_LAT_LONG) || locationListener 
         .getLongitude().equals(
           StringConstants.DEFAULT_LAT_LONG))) { 
      AlertDialog.Builder builder = new AlertDialog.Builder(
        SearchResultAbstractActivity.this); 

      builder.setMessage(StringConstants.MSG_LOCATION_ERROR) 
        .setTitle(StringConstants.MSG_TITLE_LOCATION_ERROR) 
        .setCancelable(false) 
        .setPositiveButton(StringConstants.MSG_OK_TEXT, 
          new DialogInterface.OnClickListener() { 
           public void onClick(DialogInterface dialog, 
             int id) { 
            retriveResturants(); 
           } 
          }); 

      AlertDialog alert = builder.create(); 
      alert.show(); 
     } else { 
      isValid = true; 
      retriveResturants(); 
     } 

    } catch (Exception e) { 
     // finish(); 
    } 
    return isValid; 
} 

public void logout() { 
... 
} 

@Override 
public void onLowMemory() { 
    Log.e("abstract search page :: Low Memory", " May kill me !!!!"); 
    super.onLowMemory(); 
} 
protected abstract boolean setSearchCriteria(); 

protected abstract void setTitle(); 

protected abstract int getNoResultTitle(); 

// protected abstract String getNoResultMsg();

}

在此先感謝。

來源

2012-03-20 Chanchal Shelar

+6

show.some.code。 – Th0rndike 2012-03-20 11:24:13

+0

請發佈您的佈局和Java代碼，以便我們可以檢查 – Mimminito 2012-03-20 11:32:15

+0

發佈一些代碼，否則沒有人能夠僅以此帖子爲基礎爲您提供幫助。 – Prem 2012-03-20 11:32:20

回答

0

得到的解決方案：我想我的列表沒有被刷新，即使我fireifyDataSetChanged（）;在LazyListAdapter（Custom Adapter）的公共void reSet（ArrayList resturantsCache）中，但實際上問題是實現了自定義適配器。

我再次附加我的適配器代碼，以便其他人可以得到解決方案。

適配器：

package com.topnosh.campus.util; 

import java.util.ArrayList; 

import android.app.Activity; 
import android.content.Context; 
import android.text.Html; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ArrayAdapter; 
import android.widget.ImageView; 
import android.widget.TextView; 

import com.topnosh.campus.AppDelegate; 
import com.topnosh.campus.R; 
import com.topnosh.campus.constants.StringConstants; 
import com.topnosh.campus.model.Resturant; 
import com.topnosh.campus.model.Setting; 

public class LazyListAdapter extends ArrayAdapter<Resturant> { 

public ImageLoader imageLoader; 

Context context; 
int layoutResourceId; 

public LazyListAdapter(Context context, int layoutResourceId, 
     ArrayList<Resturant> resturants) { 
    super(context, layoutResourceId, resturants); 
    this.layoutResourceId = layoutResourceId; 
    this.context = context; 
    imageLoader = new ImageLoader(context); 
    setNotifyOnChange(true); 
} 
... 
public void reSet(ArrayList<Resturant> resturantsCache) { 
    clear(); 
    for (Resturant resturant : resturantsCache) { 
     add(resturant); 
    } 
} 

... 
}

感謝所有那些誰注意到了這個問題，並試圖幫助。

來源

2012-03-23 07:18:41

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