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how to Keep Tabhost when start other activity
I am trying to launch new activity from "tab1", but the activity opens on whole screen. I need to open the new activity in the tab which fired the intent .
Use this code for actionbar and set activity in fragment in tab.
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
appContext = getApplicationContext();
//ActionBar
ActionBar actionbar = getActionBar();
actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab PlayerTab = actionbar.newTab().setText("Fragment A");
ActionBar.Tab StationsTab = actionbar.newTab().setText("Fragment B");
Fragment PlayerFragment = new AFragment();
Fragment StationsFragment = new BFragment();
PlayerTab.setTabListener(new MyTabsListener(PlayerFragment));
StationsTab.setTabListener(new MyTabsListener(StationsFragment));
actionbar.addTab(PlayerTab);
actionbar.addTab(StationsTab);
and put this class for tab.
class MyTabsListener implements ActionBar.TabListener {
public Fragment fragment;
public MyTabsListener(Fragment fragment) {
this.fragment = fragment;
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
Toast.makeText(StartActivity.appContext, "Reselected!", Toast.LENGTH_LONG).show();
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
ft.replace(R.id.fragment_container, fragment);
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
ft.remove(fragment);
}
Hope its useful for you.
thanks..
You can implement it in two ways, either:
Set contents of Tabs as ActivityGroup not activity, and change view of ActivityGroup according to navigation.
TabGroupActivity - startChildActivity - not working
But ActivityGroup is deprecated, so I would suggest to use second method.
Use fragments to Implement TabBar.
http://android.codeandmagic.org/2011/07/android-tabs-with-fragments/
Related
I am trying to understand Android fragments and navigation, but there is something I just don't know how to do. I have created an app, with a MainActivity containing a viewPager :
public class MainActivity extends FragmentActivity implements TabListener
{
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
private String[] tabNames = {"Tab 1", "Tab 2", "Tab 3"};
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mAdapter);
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
for(int i = 0 ; i < tabNames.length ; i++)
actionBar.addTab(actionBar.newTab().setText(tabNames[i]).setTabListener(this));
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft)
{
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {}
}
Here is TabsPagerAdapter :
public class TabsPagerAdapter extends FragmentPagerAdapter
{
public TabsPagerAdapter(FragmentManager fm)
{
super(fm);
}
#Override
public Fragment getItem(int index)
{
if(index == 0) return new FirstFragment();
else if(index == 1) return new SecondFragment();
else return new ThirdFragment();
}
#Override
public int getCount()
{
return 3;
}
}
And my FirstFragment is a list so it extends ListFragment. Here is what it looks like :
Now I want to go to another view if I click an item. Before I used to do it like this in apps without action bar and tabs :
Intent i = new Intent(this.getActivity().getApplicationContext(), MyNewActivity.class);
startActivity(i);
But now when I do this it doesn't display the action bar on top of the screen anymore, and I also want to keep the navigation state on this tab, if I go to another tab and then come back. What should I do?
Thanks for your help.
It is better to let each individual fragment manage its own menu items (actionbar) so you have to call setHasMenuOptions(true) in each fragment that you want to have menu options in. Get a reference to the actionbar in onActivityCreated() and configure your actionbar how you want it there. You will also have to override the oncreateoptionsmenu and onOptionsItemSelected in the fragment to handle menu item clicks.
Also using the view pager and tabs you want to make each tab a fragment. I don't know about making each tab an activity, and I don't even think that is possible, and if you are doing that then that is your problem. I don't see that from your code, and that is good.
Each tab needs to be a Fragment, so convert all of your activities into fragments and then use the supportFragmentManager to dynamically add and replace fragments to your framelayout resource, or override getItem and return the correct fragment as needed.
I put some tabs in the action bar with the following code. Everything looks fine. There are 5 tabs here. I coded each tab to open a new layout. But the problem is only the first tab works fine. Second tab opens the fifth layout and third, fouth, fifth tabs are not working. When I remove the fifth tab, then second tab opens the fourth layout and, other buttons are not woking, I couldn't silve this problem. Please help me. Thank you!
Here is my codings,
main class file;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
android.app.ActionBar actionbar = getActionBar();
actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.TabListener tabListener = new ActionBar.TabListener() {
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
// show the given tab
}
public void onTabUnselected(ActionBar.Tab tab,
FragmentTransaction ft) {
// hide the given tab
}
public void onTabReselected(ActionBar.Tab tab,
FragmentTransaction ft) {
// probably ignore this event
}
};
ActionBar.Tab baby = actionbar.newTab().setText("Baby")
.setTabListener(tabListener);
ActionBar.Tab books = actionbar.newTab().setText("Books")
.setTabListener(tabListener);
ActionBar.Tab electronics = actionbar.newTab().setText("Electronics")
.setTabListener(tabListener);
ActionBar.Tab health = actionbar.newTab().setText("Health and Beauty")
.setTabListener(tabListener);
ActionBar.Tab sports = actionbar.newTab().setText("Sports")
.setTabListener(tabListener);
Fragment babyFragment = new Baby();
Fragment booksFragment = new Books();
Fragment electronicsFragment = new Electronics();
Fragment healthFragment = new Health();
//Fragment sportsFragment = new Sports();
baby.setTabListener(new MyTabsListener(babyFragment));
books.setTabListener(new MyTabsListener(booksFragment));
books.setTabListener(new MyTabsListener(electronicsFragment));
books.setTabListener(new MyTabsListener(healthFragment));
//books.setTabListener(new MyTabsListener(sportsFragment));
actionbar.addTab(baby);
actionbar.addTab(books);
actionbar.addTab(electronics);
actionbar.addTab(health);
actionbar.addTab(sports);
}
class MyTabsListener implements ActionBar.TabListener {
public Fragment fragment;
public MyTabsListener(Fragment fragment) {
this.fragment = fragment;
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
ft.replace(R.id.fragment_container, fragment);
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
ft.remove(fragment);
}
}
every other other java file looks like this;
public class Baby extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.baby, container, false);
}
}
main xml file;
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent" android:layout_gravity="center">
<LinearLayout
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</LinearLayout>
</LinearLayout>
Pleease help me to solve this problem.
The error seems to be here:
baby.setTabListener(new MyTabsListener(babyFragment)); // OK
books.setTabListener(new MyTabsListener(booksFragment)); // OK
books.setTabListener(new MyTabsListener(electronicsFragment)); // !!
books.setTabListener(new MyTabsListener(healthFragment)); // !!
You are setting the different listeners to the same tab (that's why the "books" shows the "health" fragment, and the others do nothing).
i have the following activity which produced 3 tabs, and put fragment in each one of them.
public class ClientActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_client);
ActionBar bar = getActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab tabA = bar.newTab().setCustomView(R.layout.tab_a_layout);
ActionBar.Tab tabB = bar.newTab().setCustomView(R.layout.tab_b_layout);
ActionBar.Tab tabC = bar.newTab().setCustomView(R.layout.tab_c_layout);
Fragment fragmentA = new firstTab();
Fragment fragmentB = new secondTab();
Fragment fragmentC = new thirdTab();
tabA.setTabListener(new MyTabsListener(fragmentA));
tabB.setTabListener(new MyTabsListener(fragmentB));
tabC.setTabListener(new MyTabsListener(fragmentC));
bar.addTab(tabA);
bar.addTab(tabB);
bar.addTab(tabC);
}
protected class MyTabsListener implements ActionBar.TabListener {
private Fragment fragment;
public MyTabsListener(Fragment fragment)
{
this.fragment = fragment;
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft)
{
ft.add(R.id.fragment_place, fragment, null);
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
ft.remove(fragment);
}
}
}
in the first fragment (tabA) i have listview and listener which replacing the fragment on click.
when i am clicking on the second tab (after selecting line on the listview on tabA), the listener adding the tab instead of replacing it.
it happens because the TabUnsellected is removing the wrong fragment (it was first_tab, but replaced to test_tab on the listview selecting row).
how can i use the remove option on the ft on TabUnselected to remove the CURRENT fragment on the tab, assuming i have always 1 fragment on each tab?
Thanks
Fixed it by changing from ft.add to ft.replace on the TabSelected:
ft = getFragmentManager().beginTransaction();
ft.replace(R.id.fragment_place, fragment);
ft.commit();
How do I switch fragments inside a tab?
My application contains three fragments, AFragment, BFragment, and CFragment. These fragments, in turn, correspond to their own layout files: AFragment contains a Button, and BFragment and CFragment have TextView. There is a fourth layout file named activity_main.
Now, I have four classes, MainActivity, AFragment, BFragment and CFragment. The classes AFragment, BFragment, CFragment only the typical contain OnCreateView on each of them.
MainActivity contains this:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
appContext = getApplicationContext();
//ActionBar
ActionBar actionbar = getActionBar();
actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab PlayerTab = actionbar.newTab().setText("Fragment A");
ActionBar.Tab StationsTab = actionbar.newTab().setText("Fragment B");
Fragment PlayerFragment = new AFragment();
Fragment StationsFragment = new BFragment();
PlayerTab.setTabListener(new MyTabsListener(PlayerFragment));
StationsTab.setTabListener(new MyTabsListener(StationsFragment));
actionbar.addTab(PlayerTab);
actionbar.addTab(StationsTab);
And then the TabListener:
class MyTabsListener implements ActionBar.TabListener {
public Fragment fragment;
public MyTabsListener(Fragment fragment) {
this.fragment = fragment;
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
Toast.makeText(MainActivity.appContext, "Reselected!", Toast.LENGTH_LONG).show();
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
ft.replace(R.id.fragment_container, fragment);
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
ft.remove(fragment);
}
}
As you can see, activity_main.xml only contains a LinearLayout with an id 'fragment_container' for tabs AFragment and BFragment. Now I want it in such a way that clicking a button in AFragment switches the entire AFragment to CFragment. How can I achieve this? Thank you.
(EDIT) I did the following but my app crashed on start. What did I do wrong?
I added the following on my MainActivity.java, just below the ActionBar sequence:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
appContext = getApplicationContext();
//ActionBar
....
....
....
Button mButton = (Button) findViewById(R.id.button1);
mButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
CFragment fragment = new CFragment();
fragmentTransaction.add(R.id.fragment_container, fragment);
fragmentTransaction.commit();
}
});
get a fragment transaction using the (support) fragment manager of your activity.
replace AFragment by CFragment as you did in onTabSelected
commit your transaction.
Also, please note :
don't keep references on your fragment, you actually prevent garbage collection from occuring. You should create your fragments once, not every time. In TabSelected, check if the fragment is known by the fragment manager (using findFragmentByTag). If not, create it. If it is, just re-replace it.
share your listener, you don't need one by tab.
I'm pretty new to Fragments API and here's my question: let's say I have an Activity and an ActionBar with tabs. Suppose I want to start messaging application from my application and usually it will start as a new Activity. Is it possible to add the messaging Activity as a new tab to my Activity? How can I achieve this effect? Thanks in advance.
Inside your onCreate method do the following
Context context = getApplicationContext();
ActionBar actionbar = getActionBar();
actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab PlayerTab = actionbar.newTab().setText("Fragment A");
ActionBar.Tab StationsTab = actionbar.newTab().setText("Fragment B");
Fragment PlayerFragment = new AFragment();
Fragment StationsFragment = new BFragment();
PlayerTab.setTabListener(new MsgTabsListener(PlayerFragment, context));
StationsTab.setTabListener(new MsgTabsListener(StationsFragment, context));
actionbar.addTab(PlayerTab);
actionbar.addTab(StationsTab);
Then add the class MsgTabListener and do the following
class MsgTabsListener implements ActionBar.TabListener {
public Fragment fragment;
public Context context;
public MsgTabsListener(Fragment fragment, Context context) {
this.fragment = fragment;
this.context = context;
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
//Start a new activity here with respect to your main context.
context.StartActivity(new Intent(....));
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
ft.replace(R.id.fragment_container, fragment);
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
ft.remove(fragment);
}
If you are looking for good Fragements API tutorial then Lars Vogel has very nice explanations.
http://www.vogella.com/articles/Android/article.html#fragments_tutorial