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POTab Application Development
 

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    <p>I wish to create a tab application in Android. I wish to basically have four tabs in my application. Namely, Home, Compose, Inbox, Sent. I started with a <code>TabContainer</code> extending <code>TabActivity</code>, is this a correct approach. Since i will be having <code>MenuItem</code>, which i used be having multiple views for Inbox, as such List of inbox, i sud be able to read, and then delete and all. I wish to know how do I approach? Basically i wish to make an application similar to gmail.</p> <p>Any ideas, or direction might help me</p> <pre><code>public class Inbox extends ListActivity{ private ProgressDialog progressDialog = null; private ArrayList&lt;EmailElement&gt; emailElement = null; private InboxAdapter inboxAdapter; private CheckBoxWithInboxList newInboxAdapter; private Runnable beforeFetchingEmail; private TextView emailFromTextView = null; private TextView emailSubjectTextView = null; ListView listView; private static int mode = 0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.inbox); mode = this.getIntent().getIntExtra("EDIT_MODE", -1); Log.i("EDITMODE", String.valueOf(mode)); emailElement = new ArrayList&lt;EmailElement&gt;(); if(mode ==0 || mode==-1){ this.inboxAdapter = new InboxAdapter(this, R.layout.inbox_row, emailElement); setListAdapter(inboxAdapter); }else{ this.newInboxAdapter = new CheckBoxWithInboxList(this, R.layout.inbox_row, emailElement); setListAdapter(newInboxAdapter); } beforeFetchingEmail = new Runnable() { @Override public void run() { getEmails(); } }; Thread thread = new Thread(null, beforeFetchingEmail, "MagentoBackground"); thread.start(); progressDialog = ProgressDialog.show(Inbox.this,"Please wait...", "Retrieving Emails ...", true); listView = getListView(); listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView&lt;?&gt; parentView, View view, int position, long id) { } }); } private Runnable returnRes = new Runnable() { @Override public void run() { if(emailElement != null &amp;&amp; emailElement.size() &gt; 0){ if(mode==0 || mode==-1){ inboxAdapter.notifyDataSetChanged(); for(int i=0;i&lt;emailElement.size();i++){ inboxAdapter.add(emailElement.get(i)); } progressDialog.dismiss(); inboxAdapter.notifyDataSetChanged(); }else{ newInboxAdapter.notifyDataSetChanged(); for(int i=0;i&lt;emailElement.size();i++){ newInboxAdapter.add(emailElement.get(i)); } progressDialog.dismiss(); newInboxAdapter.notifyDataSetChanged(); } } } }; private void getEmails(){ try{ emailElement = new ArrayList&lt;EmailElement&gt;(); EmailElement ee0 = new EmailElement(); ee0.setFrom("Robin Thapa"); ee0.setSubject("Urgent Meeting"); emailElement.add(ee0); EmailElement ee1 = new EmailElement(); ee1.setFrom("Deepak Thapa"); ee1.setSubject("Staff meeting @Sunday"); emailElement.add(ee1); Thread.sleep(5000); }catch(Exception ex){ } runOnUiThread(returnRes); } @Override public boolean onCreateOptionsMenu(Menu menu){ MenuInflater menuInflater = getMenuInflater(); menuInflater.inflate(R.menu.inbox_menu, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item){ switch(item.getItemId()){ case R.id.inboxEdit: Intent intent = new Intent(this,EmailClient.class); intent.putExtra("tabId", 2); intent.putExtra("EDIT_MODE", 1); startActivityForResult(intent, Intent.FILL_IN_DATA); return true; case R.id.inboxRefresh: return true; case R.id.inboxNext: return true; case R.id.inboxPrevious: return true; } return false; } private class InboxAdapter extends ArrayAdapter&lt;EmailElement&gt;{ private ArrayList&lt;EmailElement&gt; items; public InboxAdapter(Context context,int textViewResourceId, ArrayList&lt;EmailElement&gt; items) { super(context, textViewResourceId, items); this.items = items; } @Override public View getView(int position, View convertView, ViewGroup parent) { View view = convertView; if (view == null) { LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE); view = vi.inflate(R.layout.inbox_row, null); } EmailElement o = items.get(position); if (o != null) { CheckBox emailCheckBox = (CheckBox)view.findViewById(R.id.inboxCheckBoxId); emailCheckBox.setVisibility(View.INVISIBLE); emailFromTextView = (TextView) view.findViewById(R.id.inboxEmailFrom); emailSubjectTextView = (TextView) view.findViewById(R.id.inboxEmailSubject); if (emailFromTextView != null){ emailFromTextView.setText("From: "+o.getFrom()); } if(emailSubjectTextView != null){ emailSubjectTextView.setText("Sub: ["+ o.getSubject()+"]"); } } return view; } } private class CheckBoxWithInboxList extends ArrayAdapter&lt;EmailElement&gt;{ private ArrayList&lt;EmailElement&gt; items; public CheckBoxWithInboxList(Context context,int textViewResourceId, ArrayList&lt;EmailElement&gt; items) { super(context, textViewResourceId, items); this.items = items; } @Override public View getView(int position, View convertView, ViewGroup parent) { View view = convertView; if (view == null) { LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE); view = vi.inflate(R.layout.inbox_row, null); } EmailElement o = items.get(position); if (o != null) { CheckBox emailCheckBox = (CheckBox)view.findViewById(R.id.inboxCheckBoxId); emailCheckBox.setVisibility(View.VISIBLE); emailFromTextView = (TextView) view.findViewById(R.id.inboxEmailFrom); emailSubjectTextView = (TextView) view.findViewById(R.id.inboxEmailSubject); if (emailFromTextView != null){ emailFromTextView.setText("From: "+o.getFrom()); } if(emailSubjectTextView != null){ emailSubjectTextView.setText("Sub: ["+ o.getSubject()+"]"); } } return view; } </code></pre> <p>} }</p>
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