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POThe content of the adapter has changed but ListView did not receive a notification - With AsyncTask
 

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  1. POThe content of the adapter has changed but ListView did not receive a notification - With AsyncTask
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    <p>I am using AsyncTask to set my items and stuff, in the postExecute i call a synchronized Method where i do this </p> <pre><code>mAllResultsAdapter.setItems(mAllResultsItem); mAllResultsAdapter.notifyDataSetChanged(); mListView.invalidate(); mListView.requestLayout(); </code></pre> <p>Most of the time if I dowload new data and update my listview/adapter it simply works, and pretty good to. But somehow it crashes sometime, can anyone assist me with this issue.</p> <p>heres my crash log.</p> <pre><code> 03-19 14:15:02.170: E/AndroidRuntime(23242): FATAL EXCEPTION: main 03-19 14:15:02.170: E/AndroidRuntime(23242): java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. [in ListView(2131034153, class android.widget.ListView) with Adapter(class com....tracebuzz.allresults.AllResultsAdapter)] 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.widget.ListView.layoutChildren(ListView.java:1556) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.widget.AbsListView.onLayout(AbsListView.java:1993) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.View.layout(View.java:9606) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.ViewGroup.layout(ViewGroup.java:3879) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.widget.FrameLayout.onLayout(FrameLayout.java:400) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.View.layout(View.java:9606) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.ViewGroup.layout(ViewGroup.java:3879) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.widget.RelativeLayout.onLayout(RelativeLayout.java:912) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.View.layout(View.java:9606) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.ViewGroup.layout(ViewGroup.java:3879) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.widget.FrameLayout.onLayout(FrameLayout.java:400) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.View.layout(View.java:9606) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.ViewGroup.layout(ViewGroup.java:3879) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1542) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1403) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.widget.LinearLayout.onLayout(LinearLayout.java:1314) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.View.layout(View.java:9606) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.ViewGroup.layout(ViewGroup.java:3879) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.widget.FrameLayout.onLayout(FrameLayout.java:400) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.View.layout(View.java:9606) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.ViewGroup.layout(ViewGroup.java:3879) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.ViewRoot.performTraversals(ViewRoot.java:1288) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.view.ViewRoot.handleMessage(ViewRoot.java:2066) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.os.Handler.dispatchMessage(Handler.java:99) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.os.Looper.loop(Looper.java:132) 03-19 14:15:02.170: E/AndroidRuntime(23242): at android.app.ActivityThread.main(ActivityThread.java:4126) 03-19 14:15:02.170: E/AndroidRuntime(23242): at java.lang.reflect.Method.invokeNative(Native Method) 03-19 14:15:02.170: E/AndroidRuntime(23242): at java.lang.reflect.Method.invoke(Method.java:491) 03-19 14:15:02.170: E/AndroidRuntime(23242): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844) 03-19 14:15:02.170: E/AndroidRuntime(23242): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602) 03-19 14:15:02.170: E/AndroidRuntime(23242): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>I Should update my qeustion with my code, so here it is.</p> <pre><code>public class AllResultsActivity extends TBActivity{ public String identifier, feedIdentifier, apiKey, tagID, titleName; private ProcesReuest procesReuest; public ArrayList&lt;Integer&gt; tempIDHolder = new ArrayList&lt;Integer&gt;(); public ArrayList&lt;AllResultsItem&gt; mAllResultsItem; public AllResultsAdapter mAllResultsAdapter; public ListView mListView; private Context mContext; private ViewFlipper mViewFlipper; private TextView mTitleText; private int itemsForLoad = 50; private boolean firstRun = true; private ProgressBar mLoadItemsIndicator; private int visibleThreshold = 5; private int mPage = 1; private int previousTotal = 0; private boolean loading = true; private SharedPreferences mSettings; private Editor mEdit; private View footerView; private int itemHolder; @Override public void onBackPressed() { super.onBackPressed(); procesReuest.cancel(true); AllResultsActivity.this.finish(); } @Override public void onCreate(Bundle savedInstanceState) { this.requestWindowFeature(Window.FEATURE_NO_TITLE); this.setContentView(R.layout.all_results_view); super.onCreate(savedInstanceState); getExtras(); mContext = this; itemsForLoad = 50; loadItems(apiKey); initListview(); } private void initListview() { mAllResultsItem = new ArrayList&lt;AllResultsItem&gt;(); mAllResultsAdapter = new AllResultsAdapter(this, mAllResultsItem); mListView.setAdapter(mAllResultsAdapter); mAllResultsAdapter.notifyDataSetChanged(); } @Override public void bindResources() { mLoadItemsIndicator = (ProgressBar)findViewById(R.id.all_results_view_more_items_indicator); mListView = (ListView)findViewById(R.id.all_results_listview); mViewFlipper = (ViewFlipper)findViewById(R.id.all_results_view_viewflipper); mTitleText = (TextView) findViewById(R.id.all_results_view_title_text); mSettings = getSharedPreferences(WBAConstants.TRACEBUZZ, MODE_PRIVATE); mEdit = mSettings.edit(); } @Override public void bindListeners() { mListView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView&lt;?&gt; arg0, View view, int id, long arg3) { String url = (String) view.getTag(R.string.item_url); Intent intnt = new Intent(AllResultsActivity.this, WebviewWithControllsActivity.class); if(url.contains("twitter")) { int UQID = (Integer)view.getTag(R.id.twitter_result_identifier); String table = (String)view.getTag(R.string.twitter_table); intnt.putExtra("UQID", UQID); intnt.putExtra("apiKey", apiKey); intnt.putExtra("table", table); } View bar = (View)findViewById(R.id.all_results_title_bar); int barHeight = bar.getHeight(); intnt.putExtra("barHeight", barHeight); intnt.putExtra("URL", url); AllResultsActivity.this.startActivity(intnt); } }); mListView.setOnScrollListener(new OnScrollListener() { @Override public void onScrollStateChanged(AbsListView view, int scrollState) { } @Override public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { Log.d("","totalItemCount = " + totalItemCount); if (loading) { if (totalItemCount &gt; previousTotal) { loading = false; previousTotal = totalItemCount; itemHolder = previousTotal; } } if (!loading &amp;&amp; (totalItemCount - visibleItemCount) &lt;= (firstVisibleItem + visibleThreshold)) { mLoadItemsIndicator.setVisibility(View.VISIBLE); mListView.invalidate(); mPage++; loadItems(apiKey); loading = true; } else { } } }); } private void loadItems(String passedApiKey) { procesReuest = new ProcesReuest(); procesReuest.execute(identifier, feedIdentifier, passedApiKey); } public void getExtras() { Bundle extras = getIntent().getExtras(); feedIdentifier = null; tagID = null; apiKey = null; if(extras != null) { identifier = extras.getString("identifier"); feedIdentifier = extras.getString("feedidentifier"); apiKey = extras.getString("apiKey"); titleName = extras.getString("tag_name"); tagID = extras.getString("tag_id"); if((titleName != null) &amp;&amp; (!titleName.equals("null"))) { mTitleText.setText(titleName); } } } public void displayDialog() { AlertDialog.Builder dialog = new AlertDialog.Builder(this); dialog.setTitle("Error"); dialog.setMessage("Failed to contact server, check your Internet connection or try again later"); dialog.setNegativeButton("back", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { AllResultsActivity.this.finish(); } }); dialog.show(); } private synchronized void addSyncedItems() throws InterruptedException { if(firstRun){ mAllResultsAdapter.setItems(mAllResultsItem); firstRun = false; } mAllResultsAdapter.notifyDataSetChanged(); mListView.invalidate(); mLoadItemsIndicator.setVisibility(View.GONE); } /** Subclass for processing the ResultReqesut for the specified type **/ private class ProcesReuest extends AsyncTask&lt;String, Void, Exception&gt;{ Downloader downloader = new Downloader(); JSONObject result = null; List&lt;NameValuePair&gt; postParams; boolean timeOut; @Override protected Exception doInBackground(String... params) { Log.d("","doInBackground " + apiKey); try { postParams = new ArrayList&lt;NameValuePair&gt;(2); postParams.add(new BasicNameValuePair("api_key",apiKey)); postParams.add(new BasicNameValuePair("num","100")); postParams.add(new BasicNameValuePair("feed_id", feedIdentifier)); postParams.add(new BasicNameValuePair("page", Integer.toString(mPage))); postParams.add(new BasicNameValuePair("order", "time DESC")); postParams.add(new BasicNameValuePair("tag_id", tagID)); postParams.add(new BasicNameValuePair("format", "json")); Log.d("","postParams = " + postParams); downloadJSON(postParams); proccesJSON(); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } @Override protected void onPostExecute(Exception exception) { Log.d("","onPostExecute"); try { addSyncedItems(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } try { if(!result.getJSONObject("results").getString("result_count").equals("0")){ mViewFlipper.setDisplayedChild(2); } else { Log.d("","View 3"); mViewFlipper.setDisplayedChild(2); } } catch (Exception e) { // TODO: handle exception } } private void proccesJSON() throws JSONException, IOException { String UIDHolderString = mSettings.getString(WBAConstants.UIDHOLDER, "empty"); JSONArray arrayHolder = null; if(UIDHolderString.equals("empty")){ arrayHolder = new JSONArray(); } else { arrayHolder = new JSONArray(UIDHolderString); } if(result != null){ JSONObject feedResults = result.getJSONObject("results").getJSONObject("result"); Log.d("","" + feedResults); String uniqueItemID = null; Iterator&lt;String&gt; feedResultIter = feedResults.keys(); while (feedResultIter.hasNext()) { uniqueItemID = (String) feedResultIter.next(); Log.d("","" + uniqueItemID); if(!uniqueItemID.equals("metaresult")) { AllResultsItem item = new AllResultsItem(); if(UIDHolderString.contains(uniqueItemID)) { item.setNewFeed(0); } else { item.setNewFeed(1); arrayHolder.put(uniqueItemID); } JSONObject resultItem = feedResults.getJSONObject(uniqueItemID); String typeFeed = resultItem.getString("type"); if(!typeFeed.contains("twitter") &amp;&amp; typeFeed != null){ if(resultItem.has("tags") &amp;&amp; resultItem.getString("tags")!= null) { JSONObject tags = resultItem.getJSONObject("tags"); Iterator&lt;String&gt; tagIter = tags.keys(); ArrayList&lt;String&gt; tagHolder = new ArrayList&lt;String&gt;(); while (tagIter.hasNext()) { String tagID = (String) tagIter.next(); String tagName = tags.getString(tagID); tagHolder.add(tagName); } item.setTagNames(tagHolder.toString()); } item.setType(typeFeed); if((resultItem.has("title")) &amp;&amp; (!resultItem.isNull("title")) &amp;&amp; (!resultItem.getString("title").equals("null") )) { item.setResultTitle(resultItem.getString("title")); } if(resultItem.has("unique_id")) { item.setResultIdentifier(Integer.parseInt(resultItem.getString("unique_id"))); } if(resultItem.has("src_link") &amp;&amp; (resultItem.getString("src_link") != null)) { item.setMessageURL(resultItem.getString("src_link")); } if(resultItem.has("date_time")) { item.setDate( resultItem.getString("date_time")); } if(resultItem.has("description")) { item.setMessage(resultItem.getString("description")); } } else if(resultItem.getString("type").contains("twitter")){ Icon icon = new Icon(); if((resultItem.has("title")) &amp;&amp; (!resultItem.isNull("title")) &amp;&amp; (!resultItem.getString("title").equals("null"))) { item.setUserTwitter(resultItem.getString("title")); } if(resultItem.has("unique_id")) { item.setIdentifier(Integer.parseInt(resultItem.getString("unique_id"))); } if(resultItem.has("src_link") &amp;&amp; (resultItem.getString("src_link") != null)) { item.setMessageURL(resultItem.getString("src_link")); } if(resultItem.has("date_time")) { item.setDate(resultItem.getString("date_time")); } if(resultItem.has("description")) { item.setMessageText(resultItem.getString("description")); } if(resultItem.has("image_link")) { if(!resultItem.has("null")){ icon.setImageURL(resultItem.getString("image_link")); } } if(resultItem.has("table")) { item.setTable(resultItem.getString("table")); } item.setType(typeFeed); item.addIconsObject(icon); if(resultItem.has("tags") &amp;&amp; resultItem.getString("tags")!= null) { JSONObject tags = resultItem.getJSONObject("tags"); Iterator&lt;String&gt; tagIter = tags.keys(); ArrayList&lt;String&gt; tagHolder = new ArrayList&lt;String&gt;(); while (tagIter.hasNext()) { String tagID = (String) tagIter.next(); String tagName = tags.getString(tagID); tagHolder.add(tagName); } item.setTagNames(tagHolder.toString()); } } mAllResultsItem.add(item); } } mEdit.putString(WBAConstants.UIDHOLDER, arrayHolder.toString()); mEdit.commit(); } } public boolean downloadJSON(List&lt;NameValuePair&gt;postParams) { try { result = downloader.getJSONFromURL("http://www.example.com/webservice/get_feed_results.php", true, postParams); } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } return true; } } } </code></pre> <p>The reason for the Syncronized method was just for trying to get the adapter and the listview the update the same time.</p>
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    1. USMaikel Bollemeijer
    1. USMaikel Bollemeijer
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. POThe content of the adapter has changed but ListView did not receive a notification - With AsyncTask
      1. USMaikel Bollemeijer
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      1. This table or related slice is empty.
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      1. POThe content of the adapter has changed but ListView did not receive a notification - With AsyncTask
      1. This table or related slice is empty.
      1. VTUpMod
    1. COwhere this code was written in background() or in postExecution()?
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      1. POThe content of the adapter has changed but ListView did not receive a notification - With AsyncTask
      1. USPratik
    2. COinvalidate(); and requestLayout(); are redundant if you only need refresh ListView.
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      1. POThe content of the adapter has changed but ListView did not receive a notification - With AsyncTask
      1. USyorkw
    3. COWhat's the reason behind calling a synchronized method from `onPostExecute`?
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      1. POThe content of the adapter has changed but ListView did not receive a notification - With AsyncTask
      1. USdevmiles.com
 

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