点击/触摸不工作的ListView [英] Clicks/touch not working on ListView
本文介绍了点击/触摸不工作的ListView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
我已经使用ListView和有界我的自定义ArrayAdapter它。结果
已经setOnItemClickListener（...）绑定到它。结果
I have used ListView and bounded my custom ArrayAdapter to it.
Have setOnItemClickListener(...) bound to it.
也有2个按钮，'下一个'和'previous。在每个按钮的点击我所谓的web服务，并根据收到的响应我更新适配器（并期望ListView控件得到更新。）
Also have 2 buttons, 'next' and 'previous'. On click of each button I call a webservice and as per response received I update adapter( and expect ListView to get updated.)
我的问题是，很少有下一个和previous点击之后，触摸功能上的ListView不工作。
My problem is that after few next and previous clicks, Touch does not works on ListView.
已经投入大量的时间搞清楚，请帮助我。
我的发现之一是：通常观察GC后，会出现这个问题。
Have invested lot of time in figuring out, Please help me out. one of my findings is: usually observed that problem occurs after GC.
布局code：
<?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>
适配器code：
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();
}
}
目录类别：
公共抽象类SearchResultAbstractActivity扩展活动器具
OnItemClickListener {
public abstract class SearchResultAbstractActivity extends Activity implements 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();
}
先谢谢了。
推荐答案
得到了解决办法：我想，我的名单是没有得到更新，即使我火notifyDataSetChanged（）;在公共无效复位LazyListAdapter的（ArrayList的resturantsCache）（自定义适配器），但实际问题是与实现自定义的适配器。
Got solution : I was thinking that my list is not getting refreshed even if i fire notifyDataSetChanged(); in public void reSet(ArrayList resturantsCache) of LazyListAdapter(Custom Adapter), but actually problem was with implementation of custom adapter.
我又附上我的适配器code，以便其他人可以得到解决。
I'm attaching my adapter code again, so that others can get solution.
适配器：
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);
}
}
...
}
感谢所有那些谁注意到了这个问题，并试图帮助。
Thanks to all those who noticed this issue and tried to help.
这篇关于点击/触摸不工作的ListView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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