Develop Reference

how to put an expandable list inside a ActionBar tab fragment?

Hi im a bit noob in android so i hope anyone can help me
i have an actionBar tab fragment, and i wanted to make a expandable list with data and put it on the fragment, i´ve been searching online but the examples are too complex and dont match my situation i just want a simple expandable list, can anyone help?

If I understand you correctly, you should only put ExpandableList inside of your fragment layout for particular layout for actionBar tab fragment. This should be really easy actually...
Can you provide us with some code maybe?

this is my class tabActionBarActivity:
public class TabActionBarActivity extends Activity {
String contextoId;
String BuId;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tab_action_bar);
ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
String label1 = getResources().getString(R.string.label1);
Tab tab = actionBar.newTab();
tab.setText(label1);
TabListener<Tab1Fragment> tl = new TabListener<Tab1Fragment>(this, label1, Tab1Fragment.class);
tab.setTabListener(tl);
actionBar.addTab(tab);
String label2 = getResources().getString(R.string.label2);
tab = actionBar.newTab();
tab.setText(label2);
TabListener<Tab2Fragment> tl2 = new TabListener<Tab2Fragment>(this, label2, Tab2Fragment.class);
tab.setTabListener(tl2);
actionBar.addTab(tab);
BuId = getIntent().getExtras().getString("BUId");
contextoId = getIntent().getExtras().getString("CId");
Log.i("BUIdTabFrag", BuId);
private class TabListener<T extends Fragment> implements
ActionBar.TabListener {
private Fragment mFragment;
private final Activity mActivity;
private final String mTag;
private final Class<T> mClass;
public TabListener(Activity activity, String tag, Class<T> clz) {
mActivity = activity;
mTag = tag;
mClass = clz;
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// Check if the fragment is already initialized
if (mFragment == null) {
// If not, instantiate and add it to the activity
mFragment = Fragment.instantiate(mActivity, mClass.getName());
ft.add(android.R.id.content, mFragment, mTag);
} else {
// If it exists, simply attach it in order to show it
ft.attach(mFragment);
}
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
if (mFragment != null) {
// Detach the fragment, because another one is being attached
ft.detach(mFragment);
}
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.tab_action_bar, menu);
return true;
}
and

Android Sherlock ActionBar Tab can't detach SupportMapFragment properly

I have an Android project with Sherlock ActionBar and Support Library.
In the onCreate of SherlockFragmentActivity I initialized ActionBar with 2 tabs:
private void configureActionBar(){
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab tab = actionBar.newTab()
.setText("Events")
.setTabListener(new TabListener<SampleListFragment>(
this, "events", SampleListFragment.class));
actionBar.addTab(tab);
tab = actionBar.newTab()
.setText("Map")
.setTabListener(new TabListener<SupportMapFragment>(
this, "map", SupportMapFragment.class));
actionBar.addTab(tab);
}
The problem is when I go back to the first tab, the screen is black with grayed Map controls. If I turn off\on the device screen, the Map completely removes and everyting is fine.
TabListener implementation is from the Google Manual:
public class TabListener<T extends Fragment> implements ActionBar.TabListener {
private Fragment mFragment;
private final Activity mActivity;
private final String mTag;
private final Class<T> mClass;
/** Constructor used each time a new tab is created.
* #param activity The host Activity, used to instantiate the fragment
* #param tag The identifier tag for the fragment
* #param clz The fragment's Class, used to instantiate the fragment
*/
public TabListener(Activity activity, String tag, Class<T> clz) {
mActivity = activity;
mTag = tag;
mClass = clz;
}
/* The following are each of the ActionBar.TabListener callbacks */
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
// Check if the fragment is already initialized
if (mFragment == null) {
// If not, instantiate and add it to the activity
mFragment = Fragment.instantiate(mActivity, mClass.getName());
ft.add(android.R.id.content, mFragment, mTag);
} else {
// If it exists, simply attach it in order to show it
ft.attach(mFragment);
}
}
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {
if (mFragment != null) {
// Detach the fragment, because another one is being attached
ft.detach(mFragment);
}
}
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {
// User selected the already selected tab. Usually do nothing.
}
}

I came across with similar issue once when implementing the SupportMapFragment with a SlidingMenu, after searching forums I found that it was an issue with surfaceView and that it could be fixed by setting the map transparent with this method:
private void setMapTransparent(ViewGroup group) {
int childCount = group.getChildCount();
for (int i = 0; i < childCount; i++) {
View child = group.getChildAt(i);
if (child instanceof ViewGroup) {
setMapTransparent((ViewGroup) child);
} else if (child instanceof SurfaceView) {
child.setBackgroundColor(0x00000000);
}
}
}
Just call that method on your SupportMapFragment's onCreateView.

Android Actionbar Sherlock with Tabs

I am trying to implement ActionBar Sherlock with Tabs below that as shown in the above wire-frame.
Should i use TabActivity ? - since i saw that it is deprecated. Which is the best way to achieve the same.

I implemented this functionality with a SherlockFragmentActivity as tabview container and with SherlockFragment as tabs. Here is a sketch (I omitted the usual Android activity stuff):
This is the tabview activity with two tabs:
public class TabViewActivity extends SherlockFragmentActivity {
// store the active tab here
public static String ACTIVE_TAB = "activeTab";
#Override
public void onCreate(Bundle savedInstanceState) {
..
final ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// add the first tab which is an instance of TabFragment1
Tab tab1 = actionBar.newTab()
.setText("TabTitle1")
.setTabListener(new TabListener<TabFragment1>(
this, "tab1", TabFragment1.class));
actionBar.addTab(tab1);
// add the second tab which is an instance of TabFragment2
Tab tab2 = actionBar.newTab()
.setText("TabTitle2")
.setTabListener(new TabListener<TabFragment2>(
this, "tab2", TabFragment2.class));
actionBar.addTab(tab2);
// check if there is a saved state to select active tab
if( savedInstanceState != null ){
getSupportActionBar().setSelectedNavigationItem(
savedInstanceState.getInt(ACTIVE_TAB));
}
}
#Override
protected void onSaveInstanceState(Bundle outState) {
// save active tab
outState.putInt(ACTIVE_TAB,
getSupportActionBar().getSelectedNavigationIndex());
super.onSaveInstanceState(outState);
}
}
And this is the TabFragment that holds a tab's content:
public class TabFragment extends SherlockFragment {
// your member variables here
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_va_esh, container, false);
... // do your view initialization here
return view;
}
}
And finally this is the TabListener that handles tab switches:
public class TabListener<T extends Fragment> implements ActionBar.TabListener{
private TabFragment mFragment;
private final Activity mActivity;
private final String mTag;
private final Class<T> mClass;
public TabListener(Activity activity, String tag, Class<T> clz) {
mActivity = activity;
mTag = tag;
mClass = clz;
}
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// Check if the fragment is already initialized
if (mFragment == null) {
// If not, instantiate and add it to the activity
mFragment = (TabFragment) Fragment.instantiate(
mActivity, mClass.getName());
mFragment.setProviderId(mTag); // id for event provider
ft.add(android.R.id.content, mFragment, mTag);
} else {
// If it exists, simply attach it in order to show it
ft.attach(mFragment);
}
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
if (mFragment != null) {
// Detach the fragment, because another one is being attached
ft.detach(mFragment);
}
}
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// User selected the already selected tab. Usually do nothing.
}
}

I believe TabActivity is deprecated in favor of using Fragments -- not because tab navigation is a deprecated concept. Simply use Fragments and a TabWidget.
Also, here's a similar question.
Edit:
Here's an example courtesy of Google: Android Tabs the Fragment Way

OnTabSelected not being called at all when using actionbarsherlock

I've done stuff like this before and this is a super simple example but I can't seem to get it working using actionbarsherlock v4.1.
This is the main activity
public class VanityActivity extends SherlockFragmentActivity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null) {
//restore
}
com.actionbarsherlock.app.ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionBar.setHomeButtonEnabled(false);
actionBar.setDisplayShowHomeEnabled(false);
com.actionbarsherlock.app.ActionBar.Tab tab1 = actionBar.newTab();
tab1.setText("Website");
tab1.setTabListener(new HeaderTabListener(getApplicationContext()));
tab1.setTag(1);
actionBar.addTab(tab1);
com.actionbarsherlock.app.ActionBar.Tab tab2 = actionBar.newTab();
tab2.setText("Portfolio");
tab2.setTabListener(new HeaderTabListener(getApplicationContext()));
tab2.setTag(2);
actionBar.addTab(tab2);
com.actionbarsherlock.app.ActionBar.Tab tab3 = actionBar.newTab();
tab3.setText("Team");
tab3.setTabListener(new HeaderTabListener(getApplicationContext()));
tab3.setTag(3);
actionBar.addTab(tab3);
}
}
And my HeaderTabListener class:
public class HeaderTabListener implements
com.actionbarsherlock.app.ActionBar.TabListener {
private Context context;
public HeaderTabListener(Context context){
this.context = context;
}
#Override
public void onTabSelected(com.actionbarsherlock.app.ActionBar.Tab tab, android.support.v4.app.FragmentTransaction ft) {
int i=((Integer)tab.getTag()).intValue();
if(tab.getPosition()==0){
ft.replace(android.R.id.content, CompanyFragment.newInstance(i));
}else if(tab.getPosition()==1){
ft.replace(android.R.id.content, PortfolioFragment.newInstance(i));
}
}
#Override
public void onTabUnselected(com.actionbarsherlock.app.ActionBar.Tab tab, android.support.v4.app.FragmentTransaction ft) {
Log.v("Tab selected", tab.getText().toString());
}
#Override
public void onTabReselected(com.actionbarsherlock.app.ActionBar.Tab tab, android.support.v4.app.FragmentTransaction ft) {
Log.v("Tab selected2", tab.getText().toString());
}
}
And finally one of the fragments (both fragments are the same but the text in each layout is different)
public class PortfolioFragment extends SherlockFragment {
private static final String KEY_POSITION="position";
private static final String KEY_TEXT="text";
static PortfolioFragment newInstance(int position) {
PortfolioFragment frag=new PortfolioFragment();
Bundle args=new Bundle();
args.putInt(KEY_POSITION, position);
frag.setArguments(args);
return(frag);
}
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {
View result=inflater.inflate(R.layout.fragment_portfolio, container, false);
int position=getArguments().getInt(KEY_POSITION, -1);
return(result);
}
}
So when it first loads the the tabs are all displayed correctly, the first one his highlighted and the text in CompanyFragment layout displays. But then I am unable to click any of the other tabs to change the content and my logs inside of onTabSelected just never gets called. Any thoughts? Thanks for reading.

First off, let me tell you that I have no experience with ActionBarSherlock. I looked at your code to get a few ideas for my application. Seeing as it hasn't been answered since you posted it a few month ago, I would like to share my first impression.
As far as I know, ActionBarSherlock exposes the same functionality as the most recent Android APIs. Therefore, I do think that you are missing a simple method call. You would need to call commit() (Android Developer Guide reference) after you replace the fragment. Therefore, change the line, and all similar lines from;
ft.replace(android.R.id.content, PortfolioFragment.newInstance(i));
to
ft.replace(android.R.id.content, PortfolioFragment.newInstance(i)).commit();.
I hope this will solve your problem although I do realise you state that the ònTabSelected()` method is never called. Without debugging the difference between the problems would, however, seem transparent.

Actionbar with Fragment tabs and AdMob

I have an app that uses the ActionBar with tabs in combination with Fragments.
Now I would like to separate the screen into the normal screen at the top, and a small bar at the bottom for the ads:
Left is the normal screen, the tabs and their Fragments take up the whole screen.
What I want is the situation on the right. The tabs and Fragments take up the red part, the green part is for ads.
So the red part should make room for the ads, I don't want to overlay the ads.
As the Activity which sets up the ActionBar and tabs has no layout, I'm not able to add the AdView.
How can I do this?
Edit
This is how I implemented my app. The actionbar with tabs takes care of showing the fragments, so no xml layout file is used in the main Activity.
My code:
TestActivity.java
public class TestActivity extends SherlockFragmentActivity {
private ActionBar actionBar;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setupTabs(savedInstanceState);
initAds();
}
private void setupTabs(Bundle savedInstanceState) {
actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
addTab1();
addTab2();
}
private void addTab1() {
Tab tab1 = actionBar.newTab();
tab1.setTag("1");
String tabText = "1";
tab1.setText(tabText);
tab1.setTabListener(new TabListener<MyFragment>(TestActivity.this, "1", MyFragment.class));
actionBar.addTab(tab1);
}
private void addTab2() {
Tab tab1 = actionBar.newTab();
tab1.setTag("2");
String tabText = "2";
tab1.setText(tabText);
tab1.setTabListener(new TabListener<MyFragment>(TestActivity.this, "2", MyFragment.class));
actionBar.addTab(tab1);
}
private void initAds(){
//Here I want to display the ad, only loading once, Just like Davek804 said
}
}
TabListener.java
public class TabListener<T extends SherlockFragment> implements com.actionbarsherlock.app.ActionBar.TabListener {
private final SherlockFragmentActivity mActivity;
private final String mTag;
private final Class<T> mClass;
public TabListener(SherlockFragmentActivity activity, String tag, Class<T> clz) {
mActivity = activity;
mTag = tag;
mClass = clz;
}
/* The following are each of the ActionBar.TabListener callbacks */
public void onTabSelected(Tab tab, FragmentTransaction ft) {
SherlockFragment preInitializedFragment = (SherlockFragment) mActivity.getSupportFragmentManager().findFragmentByTag(mTag);
// Check if the fragment is already initialized
if (preInitializedFragment == null) {
// If not, instantiate and add it to the activity
SherlockFragment mFragment = (SherlockFragment) SherlockFragment.instantiate(mActivity, mClass.getName());
ft.add(android.R.id.content, mFragment, mTag);
} else {
ft.attach(preInitializedFragment);
}
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
SherlockFragment preInitializedFragment = (SherlockFragment) mActivity.getSupportFragmentManager().findFragmentByTag(mTag);
if (preInitializedFragment != null) {
// Detach the fragment, because another one is being attached
ft.detach(preInitializedFragment);
}
}
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// User selected the already selected tab. Usually do nothing.
}
}
MyFragment.java
public class MyFragment extends SherlockFragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.myfragment, container, false);
}
}

Create an XML file containing the AdView definition and use <include> to include it at the bottom of each of your fragments.
Alternatively create a layout and your tabs to it. Cf. the reference dos:
To get started, your layout must include a ViewGroup in which you
place each Fragment associated with a tab. Be sure the ViewGroup has a
resource ID so you can reference it from your tab-swapping code.
Alternatively, if the tab content will fill the activity layout
(excluding the action bar), then your activity doesn't need a layout
at all (you don't even need to call setContentView()). Instead, you
can place each fragment in the default root ViewGroup, which you can
refer to with the android.R.id.content ID (you can see this ID used in
the sample code below, during fragment transactions).

http://android-developers.blogspot.com/2009/02/android-layout-tricks-2-reusing-layouts.html
http://android-developers.blogspot.com/2009/03/android-layout-tricks-3-optimize-by.html
The second link details how to do things like this picture: