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POAndroid ListView Issues in Android 2.X
 

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  1. POAndroid ListView Issues in Android 2.X
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    <p>I have created a Custom Array Adapter to populate the List View and when the Activity Loads the List View text Disappears.</p> <p><strong>PlacesListAdapter.java</strong></p> <pre><code>public class PlacesListAdapter extends ArrayAdapter&lt;Place&gt; implements Filterable { public Context context; private List&lt;Place&gt; places, orig, itemDetailsrrayList; private PlaceFilter filter; public PlacesListAdapter(Context context, int textViewResourceId) { super(context, textViewResourceId); } public PlacesListAdapter(Context context, int resource, List&lt;Place&gt; places) { super(context, resource, places); this.context = context; this.places = places; itemDetailsrrayList = places; orig = new ArrayList&lt;Place&gt;(itemDetailsrrayList); filter = new PlaceFilter(); // imageLoader = new ImageLoader(context.getApplicationContext()); } public int getCount() { return itemDetailsrrayList.size(); } public Place getItem(int position) { return itemDetailsrrayList.get(position); } public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { View view = convertView; if (view == null) { LayoutInflater inflater = (LayoutInflater) getContext() .getSystemService(Context.LAYOUT_INFLATER_SERVICE); view = inflater.inflate(R.layout.list_item_place, null); } Place place = places.get(position); if (place != null) { TextView place_name = (TextView) view .findViewById(R.id.place_title); TextView place_distance = (TextView) view .findViewById(R.id.place_distance); ImageView place_category_icon = (ImageView) view .findViewById(R.id.place_category_icon); if (place_name != null) { place_name.setText(place.getPlaceTitle()); } if (place_distance != null) { place_distance.setText("198"); } if (place_category_icon != null) { place_category_icon.setImageResource(R.drawable.icon_category); } } // Setting Alternative Row Colors if (position % 2 == 0) { view.setBackgroundResource(R.drawable.list_view_place_row_1); } else { view.setBackgroundResource(R.drawable.list_view_place_row_2); } return view; } @Override public Filter getFilter() { // TODO Auto-generated method stub return filter; } private class PlaceFilter extends Filter { @Override protected FilterResults performFiltering(CharSequence constraint) { FilterResults oReturn = new FilterResults(); ArrayList&lt;Place&gt; results = new ArrayList&lt;Place&gt;(); if (orig == null) orig = itemDetailsrrayList; if (constraint != null) { if (orig != null &amp;&amp; orig.size() &gt; 0) { for (Place g : orig) { if (g.getPlaceTitle() .toLowerCase() .startsWith(constraint.toString().toLowerCase())) results.add(g); } } oReturn.values = results; } return oReturn; } @SuppressWarnings("unchecked") @Override protected void publishResults(CharSequence constraint, FilterResults results) { itemDetailsrrayList = (ArrayList&lt;Place&gt;) results.values; notifyDataSetChanged(); } } } </code></pre> <p><strong>Place.java</strong></p> <pre><code>public class Place { Integer placeId; String placeName = "", placeDistance = "", placeCategoryIcon = ""; public Place(int placeId, String placeName, String placeDistance, String placeCategoryIcon) { this.placeId = placeId; this.placeName = placeName; this.placeDistance = placeDistance; this.placeCategoryIcon = placeCategoryIcon; } public Integer getPlaceId() { return placeId; } public void setPlaceId(int placeId) { this.placeId = placeId; } public String getPlaceName() { return placeName; } public void setPlaceName(String placeName) { this.placeName = placeName; } public String getPlaceDistance() { return placeDistance; } public void setPlaceDistance(String placeDistance) { this.placeDistance = placeDistance; } public String getPlaceCategoryIcon() { return placeCategoryIcon; } public void setPlaceCategoryIcon(String placeCategoryIcon) { this.placeCategoryIcon = placeCategoryIcon; } } </code></pre> <p><strong>MainActivity</strong></p> <pre><code> protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getWindow().requestFeature(Window.FEATURE_ACTION_BAR); setContentView(R.layout.activity_main); context = this; Log.i("Nomad", "onCreate"); List&lt;Place&gt; thePlaces = new ArrayList&lt;Place&gt;(); for (int i = 0; i &lt; places.length; i++) { Place pl = new Place(i, places[i], "NO_DISTANCE", "NO_CATEGORYICON"); thePlaces.add(pl); } listView = (ListView) findViewById(R.id.place_list); listView.setEmptyView(findViewById(R.id.empty)); adapter = new PlacesListAdapter(MainActivity.this, thePlaces); listView.setAdapter(adapter); listView.setTextFilterEnabled(true); mSearchView = (SearchView) findViewById(R.id.action_search); listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView&lt;?&gt; a, View view, int position, long id) { startActivity(new Intent(MainActivity.this, PlaceActivity.class)); } }); } </code></pre> <p><strong>activity_main.xml</strong></p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@color/primary_white" &gt; &lt;ListView android:id="@+id/place_list" android:layout_width="fill_parent" android:layout_height="wrap_content" android:cacheColorHint="#00000000" android:fadingEdge="none" &gt; &lt;/ListView&gt; &lt;TextView android:id="@+id/empty" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:padding="20dp" android:text="@string/list_view_place_empty" android:textColor="@color/black" android:textSize="18sp" /&gt; &lt;/LinearLayout&gt; </code></pre> <p><strong>list_item_place.xml</strong></p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:paddingBottom="10dp" android:paddingTop="10dp" &gt; &lt;ImageView android:id="@+id/place_category_icon" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:contentDescription="ss" android:paddingLeft="10dp" android:paddingRight="15dp" android:src="@drawable/icon_category" /&gt; &lt;TextView android:id="@+id/place_distance" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:paddingRight="15dp" android:textColor="@color/black" android:text="320" /&gt; &lt;TextView android:id="@+id/place_title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_toRightOf="@+id/place_category_icon" android:ellipsize="end" android:paddingRight="50dp" android:singleLine="true" android:text="Place Name" android:textColor="#191919" android:textSize="18sp" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p>This is how it appears on Load</p> <p><img src="https://i.stack.imgur.com/aoubt.png" alt="enter image description here"></p> <p>On trying to Scroll the content reappears. <img src="https://i.stack.imgur.com/PAZuC.png" alt="enter image description here"></p>
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    1. COI always recommend using this method to inflate adapter views: inflater.inflate(R.layout.list_item_place, parent, false);
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      1. POAndroid ListView Issues in Android 2.X
      1. USsatur9nine
 

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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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