说明： 我的片段中有一个列表视图。当我单击listview的一行时，它会转到另一个activity。在listview中，我从适配器获取数据。 在适配器视图中，我设置了setOnClick（）。
问题是，当我多次单击其中一行时，它会打开多个活动。我想只限制一次点击listview项目上的特定行。
这是我的片段，我获取listview并设置适配器 -
public class HomeFragment extends Fragment{
public HomeFragment() {
}
public static String key_updated = "updated", key_description = "description", key_title = "title", key_link = "link", key_url = "url", key_name = "name", key_description_text = "description_text";
private static String url = "";
List<String> lst_key = null;
List<JSONObject> arr_completed = null;
List<String> lst_key2 = null;
List<JSONObject> lst_obj = null;
List<String> list_status = null;
ListView completed_listview;
int PagerLength = 0,exeption_flag=0;
View rootView;
private ViewPager pagerRecentMatches;
private ImageView imgOneSliderRecent;
private ImageView imgTwoSliderRecent;
private ImageView imgThreeSliderRecent;
private ImageView imgFourSliderRecent;
private ImageView imgFiveSliderRecent;
private ImageView imgSixSliderRecent;
private ImageView imgSevenSliderRecent;
private ImageView imgEightSliderRecent;
LinearLayout selector_dynamic;
LinearLayout Recent_header_layout;
FrameLayout adbar;
String access_token = "";
SharedPreferences sharedPreferences;
int current_pos=0,status_flag=0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(false);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_home, container, false);
findViews();
selector_dynamic = (LinearLayout) rootView.findViewById(R.id.selectors_dynamic);
adbar = (FrameLayout) rootView.findViewById(R.id.adbar);
new AddLoader(getContext()).LoadAds(adbar);
MainActivity activity = (MainActivity) getActivity();
access_token = activity.getMyData();
sharedPreferences = getContext().getSharedPreferences("HomePref", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
if (access_token == null || access_token=="") {
url = "https://api.litzscore.com/rest/v2/recent_matches/?access_token=" + sharedPreferences.getString("access_token", null) + "&card_type=summary_card";
} else {
editor.putString("access_token", access_token);
editor.commit();
url = "https://api.litzscore.com/rest/v2/recent_matches/?access_token=" + access_token + "&card_type=summary_card";
}
completed_listview = (ListView) rootView.findViewById(R.id.completed_listview);
Recent_header_layout = (LinearLayout) rootView.findViewById(R.id.Recent_header_layout);
Recent_header_layout.setVisibility(View.GONE);
if(!Utils.isNetworkConnected(getContext())){
dialog_popup();
}
else{
new TabJson().execute();
}
pagerRecentMatches.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
return false;
}
});
return rootView;
}
@Override
public void onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
return super.onOptionsItemSelected(item);
}
private void dialog_popup() {
final Dialog dialog = new Dialog(getContext());
DisplayMetrics metrics = getResources()
.getDisplayMetrics();
int screenWidth = (int) (metrics.widthPixels * 0.90);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.internet_alert_box);
dialog.getWindow().setLayout(screenWidth, WindowManager.LayoutParams.WRAP_CONTENT);
dialog.setCancelable(true);
Button btnNo = (Button) dialog.findViewById(R.id.btn_no);
Button btnYes = (Button) dialog.findViewById(R.id.btn_yes);
btnNo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
getActivity().finish();
}
});
dialog.show();
btnYes.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(!Utils.isNetworkConnected(getContext())){
dialog_popup();
}
else{
dialog.dismiss();
new TabJson().execute();
}
}
});
dialog.show();
}
public class TabJson extends AsyncTask<String, String, String> {
String jsonStr = "";
@Override
protected void onPreExecute() {
Utils.Pdialog(getContext());
}
@Override
protected String doInBackground(String... params) {
jsonStr = new CallAPI().GetResponseGetMethod(url);
exeption_flag=0;
status_flag = 0;
if (jsonStr != null) {
try {
if (jsonStr.equals("IO") || jsonStr.equals("MalFormed") || jsonStr.equals("NotResponse")) {
exeption_flag = 1;
} else {
JSONObject obj = new JSONObject(jsonStr);
if (obj.has("status") && !obj.isNull("status")) {
if (obj.getString("status").equals("false") || obj.getString("status").equals("403")) {
status_flag = 1;
} else {
JSONObject data = obj.getJSONObject("data");
JSONArray card = data.getJSONArray("cards");
PagerLength = 0;
lst_obj = new ArrayList<>();
list_status = new ArrayList<>();
lst_key = new ArrayList<>();
lst_key2 = new ArrayList<>();
arr_completed = new ArrayList<>();
for (int i = 0; i < card.length(); i++) {
JSONObject card_obj = card.getJSONObject(i);
if (card_obj.getString("status").equals("started")) {
PagerLength++;
lst_obj.add(card_obj);
list_status.add(card_obj.getString("status"));
lst_key.add(card_obj.getString("key"));
}
if (card_obj.getString("status").equals("notstarted")) {
PagerLength++;
lst_obj.add(card_obj);
list_status.add(card_obj.getString("status"));
lst_key.add(card_obj.getString("key"));
}
if (card_obj.getString("status").equals("completed")) {
arr_completed.add(card_obj);
lst_key2.add(card_obj.getString("key"));
}
}
}
}
}
}
catch(JSONException e){
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
Utils.Pdialog_dismiss();
if (status_flag == 1 || exeption_flag==1) {
dialog_popup();
} else {
Recent_header_layout.setVisibility(View.VISIBLE);
LiveAdapter adapterTabRecent = new LiveAdapter(getContext(), lst_obj, PagerLength, list_status, lst_key);
adapterTabRecent.notifyDataSetChanged();
pagerRecentMatches.setAdapter(adapterTabRecent);
pagerRecentMatches.setCurrentItem(current_pos);
ScheduleAdapter CmAdapter = new ScheduleAdapter(getContext(), arr_completed, lst_key2);
CmAdapter.notifyDataSetChanged();
completed_listview.setAdapter(CmAdapter);
}
}
}
private void findViews() {
pagerRecentMatches = (ViewPager) rootView
.findViewById(R.id.pager_recent_matches);
imgOneSliderRecent = (ImageView) rootView
.findViewById(R.id.img_one_slider_recent);
imgTwoSliderRecent = (ImageView) rootView
.findViewById(R.id.img_two_slider_recent);
imgThreeSliderRecent = (ImageView) rootView
.findViewById(R.id.img_three_slider_recent);
imgFourSliderRecent=(ImageView)rootView.findViewById(R.id.img_four_slider_recent);
imgFiveSliderRecent=(ImageView)rootView.findViewById(R.id.img_five_slider_recent);
imgSixSliderRecent=(ImageView)rootView.findViewById(R.id.img_six_slider_recent);
imgSevenSliderRecent = (ImageView) rootView.findViewById(R.id.img_seven_slider_recent);
imgEightSliderRecent = (ImageView) rootView.findViewById(R.id.img_eight_slider_recent);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
@Override
public void onDetach() {
super.onDetach();
}
}
从服务器加载数据后，它传递给onPost（）我调用了一个扩展BaseAdpter的适配器
这是我的BaseAdapter
包适配器;
public class ScheduleAdapter extends BaseAdapter{
private Context context;
private List<JSONObject> arr_schedule;
private List<String> arr_matchKey;
private static LayoutInflater inflater;
int flag = 0;
String time="";
String status="";
String match_title = "";
String match_key="";
public ScheduleAdapter(Context context,List<JSONObject> arr_schedule,List<String> arr_matchKey){
this.context=context;
this.arr_schedule=arr_schedule;
this.arr_matchKey=arr_matchKey;
inflater=(LayoutInflater)this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return this.arr_schedule.size();
}
@Override
public Object getItem(int position) {
return this.arr_schedule.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
private class Holder{
TextView txt_one_country_name;
TextView txt_two_country_name;
TextView txt_venue;
TextView txtTimeGMT;
TextView txtDate;
TextView txtTimeIST;
ImageView team_one_flag_icon;
ImageView team_two_flag_icon;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
Holder holder=new Holder();
String[] parts;
String[] state_parts;
String[] match_parts;
Typeface tf=null;
String winner_team = "";
String final_Score="";
String now_bat_team="",team_name="";
String related_status="";
if(convertView==null) {
convertView = inflater.inflate(R.layout.recent_home_layout, null);
holder.txt_one_country_name = (TextView) convertView.findViewById(R.id.txt_one_country_name);
holder.txt_two_country_name = (TextView) convertView.findViewById(R.id.txt_two_country_name);
holder.txt_venue = (TextView) convertView.findViewById(R.id.venue);
holder.txtTimeIST = (TextView) convertView.findViewById(R.id.txt_timeist);
holder.txtTimeGMT = (TextView) convertView.findViewById(R.id.txt_timegmt);
holder.txtDate = (TextView) convertView.findViewById(R.id.txt_date);
holder.team_one_flag_icon = (ImageView) convertView.findViewById(R.id.team_one_flag_icon);
holder.team_two_flag_icon = (ImageView) convertView.findViewById(R.id.team_two_flag_icon);
tf = Typeface.createFromAsset(convertView.getResources().getAssets(), "Roboto-Regular.ttf");
holder.txt_one_country_name.setTypeface(tf);
holder.txt_two_country_name.setTypeface(tf);
holder.txt_venue.setTypeface(tf);
holder.txtTimeIST.setTypeface(tf);
holder.txtTimeGMT.setTypeface(tf);
holder.txtDate.setTypeface(tf);
convertView.setTag(holder);
}
else{
holder=(Holder)convertView.getTag();
}
try {
String overs="";
String wickets_now="";
String now_runs="";
String[] over_parts;
time = "";
JSONObject mainObj = this.arr_schedule.get(position);
status = mainObj.getString("status");
String name = mainObj.getString("short_name");
String state = mainObj.getString("venue");
String title = mainObj.getString("title");
related_status=mainObj.getString("related_name");
JSONObject start_date = mainObj.getJSONObject("start_date");
JSONObject teams=null;
JSONObject team_a=null;
JSONObject team_b=null;
String team_a_key="";
String team_b_key="";
time = start_date.getString("iso");
parts = name.split("vs");
match_parts = title.split("-");
state_parts = state.split(",");
int length = state_parts.length;
flag=0;
match_title="";
winner_team="";
if (!mainObj.isNull("msgs")) {
JSONObject msgs = mainObj.getJSONObject("msgs");
winner_team = "";
if (msgs.has("info")) {
winner_team = msgs.getString("info");
flag = 1;
}
}
match_title=name+" - "+match_parts[1];
JSONObject now=null;
if(mainObj.has("now") && !mainObj.isNull("now")) {
now = mainObj.getJSONObject("now");
if (now.has("batting_team")) {
now_bat_team = now.getString("batting_team");
}
if (now.has("runs")) {
if (now.getString("runs").equals("0")) {
now_runs = "0";
} else {
now_runs = now.getString("runs");
}
}
if (now.has("runs_str") && !now.isNull("runs_str")) {
if (now.getString("runs_str").equals("0")) {
overs = "0";
} else {
if(now.getString("runs_str").equals("null")){
overs="0";
}
else{
over_parts=now.getString("runs_str").split(" ");
overs=over_parts[2];
}
}
}
if (now.has("wicket")) {
if (now.getString("wicket").equals("0")) {
wickets_now = "0";
} else {
wickets_now = now.getString("wicket");
}
}
}
try {
if (!mainObj.isNull("teams") && mainObj.has("teams")) {
teams = mainObj.getJSONObject("teams");
team_a = teams.getJSONObject("a");
team_b = teams.getJSONObject("b");
team_a_key = team_a.getString("key");
team_b_key = team_b.getString("key");
JSONArray team_arr = teams.names();
JSONObject team_obj;
for (int a = 0; a < team_arr.length(); a++) {
if (now_bat_team.equals(team_arr.getString(a))) {
team_obj = teams.getJSONObject(team_arr.getString(a));
if (team_obj.has("short_name") && !team_obj.isNull("short_name")) {
team_name = team_obj.getString("short_name");
}
}
}
}
}
catch (NullPointerException e){
e.printStackTrace();
}
if(mainObj.has("status_overview") && !mainObj.isNull("status_overview")){
if(mainObj.getString("status_overview").equals("abandoned") || mainObj.getString("status_overview").equals("canceled")){
final_Score="";
}
else{
final_Score=team_name+" - "+now_runs+"/"+wickets_now+" ("+overs+" ovr)";
}
}
holder.txt_one_country_name.setText(parts[0]);
holder.txt_two_country_name.setText(parts[1]);
if(length==1){
holder.txtTimeGMT.setTextSize(TypedValue.COMPLEX_UNIT_SP, 13);
holder.txtTimeGMT.setText(state_parts[0]);
}
if(length==2){
holder.txtTimeGMT.setTextSize(TypedValue.COMPLEX_UNIT_SP, 12);
holder.txtTimeGMT.setText(state_parts[0] + "," + state_parts[1]);
}
if(length==3){
holder.txtTimeGMT.setTextSize(TypedValue.COMPLEX_UNIT_SP,12);
holder.txtTimeGMT.setText(state_parts[1] + "," + state_parts[2]);
}
if(length==4){
holder.txtTimeGMT.setTextSize(TypedValue.COMPLEX_UNIT_SP,12);
holder.txtTimeGMT.setText(state_parts[2] + "," + state_parts[3]);
}
holder.txtDate.setText(final_Score);
holder.txtDate.setTypeface(tf, Typeface.BOLD);
holder.txtDate.setTextSize(TypedValue.COMPLEX_UNIT_SP, 14);
holder.txtTimeIST.setText(winner_team);
holder.txt_venue.setText(related_status);
} catch (JSONException e) {
e.printStackTrace();
}
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
match_key = arr_matchKey.get(position);
MainActivity activity = (MainActivity) context;
GetValue gv = new GetValue(context);
gv.setFullUrl(match_key);
gv.setAccessToken(activity.getMyData());
gv.execute();
}
});
return convertView;
}
@Override
public boolean isEnabled(int position) {
return super.isEnabled(position);
}
}
此适配器将listrow项设置为listview。
在ScheduleAdapter.java中，我在convertView上设置了onclick（），在其中我调用了一个GetValue类，它只实现了一个Asynctask来获取数据并调用它，然后调用它来进行活动。
表示HomeFragment-＆gt; ScheduleAdapter-＆gt; GetValue-＆gt;记分卡
下面， HomeFragment是具有listview
的片段ScheduleAdpter是一个适配器，它将数据设置为listview，它位于homefragment
中GetValue是实现一些重要任务的类，它传递了一个intent并转到一个活动（它作为背景工作）
ScoreCard是我的活动，点击了位于HomeFragment中的listview行后调用。
请帮我解决这个问题。
答案 0 :(得分：1)
您可以在Listview中使用标记click - isListClicked，并在Aysnc任务类的onPostexecute方法中将标志值设置为false -GetValue
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(!isListClicked){
match_key = arr_matchKey.get(position);
MainActivity activity = (MainActivity) context;
GetValue gv = new GetValue(context);
gv.setFullUrl(match_key);
gv.setAccessToken(activity.getMyData());
gv.execute();
isListClicked = true;
}
}
});
答案 1 :(得分：0)
如果您想阻止用户使用触摸进行多个活动，请在onClick事件中添加删除该onClickListener，以便在第一次按下后听众不会存在。
答案 2 :(得分：0)
简单的方法是，您可以使用持有者类中的那些字段创建json对象的模型类。并添加一个布尔字段isClickable，默认情况下为true值。现在，当用户第一次按行时，您可以将模型类字段isClickable设置为false。现在第二次当用户按下一行时，您将获得一个行位置，您可以检查isClickable。这次它会返回false。
模特课程：
public class CountryInfoModel {
//other fields to parse json object
private boolean isClickable; //<- add one more extra field
public boolean isClickable() {
return isClickable;
}
public void setIsClickable(boolean isClickable) {
this.isClickable = isClickable;
}
}
listview点击执行：
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//country_list is your list of model class List<CountryInfo>
if(country_list.get(position).isClickable())
{
//Perform your logic
country_list.get(position).setIsClickable(false);
}else{
//Do nothing : 2nd time click
}
}
});
答案 3 :(得分：0)
尝试为列表视图创建自定义单击侦听器并使用它。就这样
public abstract class OnListItemClickListener implements OnItemClickListener {
private static final long MIN_CLICK_INTERVAL=600;
private long mLastClickTime;
public abstract void onListItemSingleClick(View parent, View view, int position, long id);
public OnListItemClickListener() {
// TODO Auto-generated constructor stub
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// TODO Auto-generated method stub
long currentClickTime=SystemClock.uptimeMillis();
long elapsedTime=currentClickTime-mLastClickTime;
mLastClickTime=currentClickTime;
if(elapsedTime<=MIN_CLICK_INTERVAL)
return;
onListItemSingleClick(parent, view, position, id);
}
}