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POModified button resets back on scroll ListView
 

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    <p>I'm creating a listview by using a Json data. I'm populating some Images, text fields and a button. When user clicks on the button buttons caption is changes.</p> <p>Problem is that if button is modified and user scrolled the listview button resets to first status. Please check this video it is better to explain : <a href="https://www.youtube.com/watch?v=57ZraP7ED2E&amp;feature=youtu.be" rel="nofollow">https://www.youtube.com/watch?v=57ZraP7ED2E&amp;feature=youtu.be</a></p> <p>Adapter </p> <pre><code>public class FilmRequestAdapter extends ArrayAdapter&lt;FilmRequest&gt;{ Context context; List&lt;FilmRequest&gt; data; public FilmRequestAdapter(Context context, int resource, List&lt;FilmRequest&gt; objects) { super(context, resource, objects); // TODO Auto-generated constructor stub this.context=context; this.data=objects; } @Override public View getView(int position, View convertView, ViewGroup parent) { View row=convertView; if (row==null) { LayoutInflater inflater=((Activity)context).getLayoutInflater(); row=inflater.inflate(R.layout.film_request_list,null); } ((TextView)row.findViewById(R.id.FilmRequestFilmTitle)).setText(((FilmRequest)data.get(position)).title); ((TextView)row.findViewById(R.id.FilmRequestRating)).setText("Imdb Puanı : "+((FilmRequest)data.get(position)).rating); ((TextView)row.findViewById(R.id.FilmRequestOrder)).setText("Sıra : "+((FilmRequest)data.get(position)).order); ((TextView)row.findViewById(R.id.FilmRequestVoteCount)).setText("Oya adeti : "+((FilmRequest)data.get(position)).voteCount); Button button=(Button)row.findViewById(R.id.FilmRequestActionButton); String status=((FilmRequest)data.get(position)).status; boolean requested=((FilmRequest)data.get(position)).requested; boolean voted=((FilmRequest)data.get(position)).voted; if (status.equalsIgnoreCase("A") || status.equalsIgnoreCase("")) { if (requested) { if (voted) { button.setText("Oylanmış"); button.setEnabled(false); }else { button.setText("+ Oyla"); button.setEnabled(true); button.setTag(R.string.film_request_action, "VOTEABLE"); button.setTag(R.string.film_request_id,((FilmRequest)data.get(position)).id); } } else { button.setText("Filmi İste"); button.setEnabled(true); button.setTag(R.string.film_request_action, "REQUESTABLE"); button.setTag(R.string.film_request_id,((FilmRequest)data.get(position)).imdbId); } } else { button.setText("Eklenmiş"); button.setEnabled(false); } button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { FilmRequestActivity.ButtonClickFunction(context,(Button)v); } }); ((ImageView)row.findViewById(R.id.FilmRequestPoster)).setImageBitmap(((FilmRequest)data.get(position)).bm); return row; } } </code></pre> <p>Async Class</p> <pre><code>public class FilmRequestAsync extends AsyncTask&lt;String, Void, List&lt;FilmRequest&gt;&gt;{ Context context; ListView listView; private ProgressDialog progressDialog; public FilmRequestAsync (Context context) { this.context=context; this.listView=(ListView) ((Activity)context).findViewById(R.id.FilmRequestList); } protected void onPreExecute() { this.progressDialog = ProgressDialog.show(context, "Lütfen Bekleyin...", "Fimler Yükleniyor...",true); } @Override protected List&lt;FilmRequest&gt; doInBackground(String... params) { Log.d("debug","FilmRequestAsync param[0]"+params[0]); List&lt;FilmRequest&gt; filmRequests=null; String jsonString; try { jsonString=GeneralFunctions.getUrl(params[0]); if (jsonString!=null) { filmRequests=this.getFilmRequestListFromJsonString(jsonString); } }catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return filmRequests; } private List&lt;FilmRequest&gt; getFilmRequestListFromJsonString(String jsonString){ List&lt;FilmRequest&gt; filmRequests=new ArrayList&lt;FilmRequest&gt;(); try { Log.d("debug","Json Verisi oluşturuluyor."); JSONArray json=new JSONArray(jsonString); Log.d("debug","Json Verisi Oluşturuldu"); int i; for (i=0;i&lt;json.length();i++) { JSONObject tmpJson=(JSONObject)json.get(i); filmRequests.add( new FilmRequest( tmpJson.getString("id"), tmpJson.getString("imdb_id"), tmpJson.getString("poster"), tmpJson.getString("title"), tmpJson.getString("rating"), tmpJson.getString("order"), tmpJson.getString("status"), tmpJson.getString("vote_count"), tmpJson.getBoolean("requested"), tmpJson.getBoolean("voted") ) ); tmpJson=null; } } catch (JSONException e) { Log.d("debug","Json Verisi HATASI:"); filmRequests=null; e.printStackTrace(); } return filmRequests; } @Override protected void onPostExecute(List&lt;FilmRequest&gt; result) { this.progressDialog.dismiss(); if (result==null) return; // TODO Auto-generated method stub super.onPostExecute(result); Log.d("debug", "FilmRequestAsync onPostExecute Başı"); FilmRequestAdapter filmRequestAdapter=new FilmRequestAdapter(context, R.layout.film_request_list, result); Log.d("debug","FilmRequestAsync:Adapter set ediliyor."); listView.setAdapter(filmRequestAdapter); Log.d("debug", "onPostExecute Sonu"); } } </code></pre> <p>List Xml File</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/film_container" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginBottom="2dp" android:background="@drawable/film_list_style" android:orientation="horizontal" android:padding="3dp" &gt; &lt;!-- ListRow Left sied Thumbnail image --&gt; &lt;!-- Title Of Song--&gt; &lt;!-- Artist Name --&gt; &lt;!-- Rightend Duration --&gt; &lt;ImageView android:id="@+id/FilmRequestPoster" android:layout_width="83dp" android:layout_height="106dp" /&gt; &lt;Button android:id="@+id/FilmRequestActionButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:text="+ Oyla" /&gt; &lt;TextView android:id="@+id/FilmRequestRating" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/FilmRequestFilmTitle" android:layout_below="@+id/FilmRequestFilmTitle" android:text="Rating" /&gt; &lt;TextView android:id="@+id/FilmRequestVoteCount" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/FilmRequestOrder" android:layout_below="@+id/FilmRequestOrder" android:text="VoteCount" /&gt; &lt;TextView android:id="@+id/FilmRequestFilmTitle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="@+id/FilmRequestActionButton" android:layout_toRightOf="@+id/FilmRequestPoster" android:text="Rihanna Love the way lie" android:textColor="#040404" android:textSize="15dip" android:textStyle="bold" android:typeface="sans" /&gt; &lt;TextView android:id="@+id/FilmRequestOrder" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/FilmRequestRating" android:layout_toRightOf="@+id/FilmRequestPoster" android:text="Order" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p>Click Functions</p> <pre><code> public static void ButtonClickFunction(Context context, Button button){ //Burası Ne işlem yapabileceğimizi gösteriyor. //REQUESTABLE veya VOTABLE değerleri alabilir. String action=(String)button.getTag(R.string.film_request_action); String id=(String)button.getTag(R.string.film_request_id); Log.d("debug", "String action="+action); if (action.equalsIgnoreCase("VOTEABLE")) { VoteFilm(context, button,id); } else if (action.equalsIgnoreCase("REQUESTABLE")) { RequestFilm(context, button, id); } } public static void VoteFilm(Context context, final Button button, final String id){ final String callUrl=context.getString(R.string.api_url)+"?request=vote_film&amp;user_id=1&amp;id="+id; Log.d("debug", "FilmRequestActivity-&gt;VoteFilm-&gt;callUrl:"+callUrl); new Thread(new Runnable() { @Override public void run() { try { GeneralFunctions.getUrl(callUrl); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } button.post(new Runnable() { @Override public void run() { button.setText("Oylanmış"); button.setEnabled(false); } }); } }).start(); Toast.makeText(context, "Film Oylandı", Toast.LENGTH_SHORT).show(); } public static void RequestFilm(Context context, final Button button,final String id){ final String callUrl=context.getString(R.string.api_url)+"?request=request_film&amp;user_id=1&amp;id="+id; Log.d("debug", "FilmRequestActivity-&gt;RequestFilm-&gt;callUrl:"+callUrl); new Thread(new Runnable() { @Override public void run() { String jsonString; final JSONObject jsonObject; try { jsonString = GeneralFunctions.getUrl(callUrl); jsonObject=GeneralFunctions.StringToJSONObject(jsonString); if (jsonObject!=null) { button.post(new Runnable() { @Override public void run() { try { Log.d("debug","Inside Thread"); JSONObject data=(JSONObject) jsonObject.get("data"); String new_id=data.getString("id"); button.setTag(R.string.film_request_action,"VOTEABLE"); button.setTag(R.string.film_request_id,new_id); button.setText("+Oyla"); button.setEnabled(true); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }); } } catch (Exception e) { e.printStackTrace(); } } }).start(); } } </code></pre>
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    1. COWhat is this doing? : `FilmRequestActivity.ButtonClickFunction(context,(Button)v);` Can you post code for this method?
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    2. COVikram I have updated it.
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    3. COthe better way is in ButtonClickFunction change the data and call notifyDataSetChanged http://developer.android.com/reference/android/widget/BaseAdapter.html#notifyDataSetChanged()
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      1. USSudar Nimalan
 

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