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POCan't update a ListView inside a TabHost's FrameLayout
 

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  1. POCan't update a ListView inside a TabHost's FrameLayout
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    <p>I have a TabActivity with a single ListView inside TabHost's FrameLayout. This ListView is shared among my 3 tabs. The items of the list are downloaded from the internet using a Handler, but the list is not being updated when the data come. When I select another tab, the list updates itself, but I want to be able to see it being updated after download. I've already tried to invalidate the ListView, the FrameLayout and the TabHost, but nothing happens. The notifyDataSetChanged() and notifyDataSetInvalidated() methods don't help either. If I put the ListView out of the FrameLayout, it works as expected. Here's the code:</p> <pre><code> &lt;?xml version="1.0" encoding="UTF-8"?&gt; </code></pre> <p></p> <pre><code>&lt;TabHost android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_alignParentTop="true"&gt; &lt;LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"&gt; &lt;TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content" /&gt; &lt;FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="fill_parent"&gt; &lt;ListView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/comments_list_lv" android:layout_width="fill_parent" android:layout_height="fill_parent" /&gt; &lt;/FrameLayout&gt; &lt;/LinearLayout&gt; </code></pre> <p> </p> <pre><code> public class CommentsActivity extends TabActivity implements Handler.Callback, OnTabChangeListener { private static final int take = 20; private Handler handler; private CommentsListModel model = null; private ListView listView; private CommentsListAdapter adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.comments_activity); handler = new Handler(this); setContentView(R.layout.comments_activity); listView = (ListView) findViewById(R.id.comments_list_lv); listView.setTextFilterEnabled(true); getTabHost().setOnTabChangedListener(this); buildTabs(); setListView(); requestData(); } @Override public boolean handleMessage(Message msg) { AbstractResponse response = (AbstractResponse) msg.obj; ResponseStatus status = response.getStatus(); if (status.getResponseCode() == ResponseStatus.OK) { model = (CommentsListModel) response.getResponseObject(); adapter = new CommentsListAdapter(this, model.getComments()); listView.setAdapter(adapter); } return true; } @Override public synchronized void onTabChanged(String tabName) { if (model != null) { Resources res = getResources(); CommentsFilter filter = null; if (tabName.equals(res.getString(R.string.comments_all))) { filter = new CommentsFilter(model.getComments(), CommentsFilter.ALL); } else if (tabName.equals(res.getString(R.string.comments_liked))) { filter = new CommentsFilter(model.getComments(), CommentsFilter.LIKED); } else if (tabName.equals(res.getString(R.string.comments_disliked))) { filter = new CommentsFilter(model.getComments(), CommentsFilter.DISLIKED); } adapter = new CommentsListAdapter(this, filter.filter()); listView.setAdapter(adapter); } } private void buildTabs() { Resources res = getResources(); TabHost tabHost = getTabHost(); String tabName = res.getString(R.string.comments_all); TabHost.TabSpec spec = tabHost.newTabSpec(tabName); spec.setIndicator(tabName, null); spec.setContent(R.id.comments_list_lv); tabHost.addTab(spec); tabName = res.getString(R.string.comments_liked); spec = tabHost.newTabSpec(tabName); spec.setIndicator(tabName, null); spec.setContent(R.id.comments_list_lv); tabHost.addTab(spec); tabName = res.getString(R.string.comments_disliked); spec = tabHost.newTabSpec(tabName); spec.setIndicator(tabName, null); spec.setContent(R.id.comments_list_lv); tabHost.addTab(spec); } private void requestData() { AbstractRequest request = new CommentsRequest(barcode, 0, take); request.addListener(handler); Message msg = new Message(); msg.what = ApplicationActions.ProtocolActions.REQUEST; msg.obj = request; msg.setTarget(AsyncRequestController.getInstance().getInboxHandler()); msg.sendToTarget(); } } </code></pre>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USFlávio Faria
    1. USFlávio Faria
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

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A row detail

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.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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