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POHow to change fragment inside same tab under ActionBar?
 

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  1. POHow to change fragment inside same tab under ActionBar?
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    <p>My problem is about fragment and ActionBar (android.support.v7.app.ActionBar)</p> <p>I followed this <a href="http://developer.android.com/guide/topics/ui/actionbar.html" rel="nofollow">example</a> in particular the section "Adding Navigation Tabs"</p> <p>The example works fine, but I have a problem when I would like change the content of a tab (thus fragment) with another fragment.</p> <p>In this example, I have added one button at the first fragment "Tab_Fragment_1" (under first tab). When the button is pressed, I would like change content (thus load another fragment), obviously under the same tab.</p> <p>In the MainActivity I added the method "clickbutton", that is defined in tab_fragment_1'layout</p> <p>I don't know the pattern to follow. How can I do it?</p> <p>Below is my code:</p> <p>MainActivity</p> <pre><code> public class MainActivity extends ActionBarActivity { private String TAG="MainActivity"; Tab tab =null; Tab_Fragment_2A tab_Fragment_2A=null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Log.d(TAG, "msg-1"); ActionBar actionBar = getSupportActionBar(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); actionBar.setDisplayShowTitleEnabled(false); tab = actionBar.newTab() .setText(R.string.tab_1) .setTabListener(new TabListener&lt;Tab_Fragment_1&gt;( this, "tab_1", Tab_Fragment_1.class)); actionBar.addTab(tab); tab = actionBar.newTab() .setText(R.string.tab_2) .setTabListener(new TabListener&lt;Tab_Fragment_2&gt;( this, "tab_2", Tab_Fragment_2.class)); actionBar.addTab(tab); tab = actionBar.newTab() .setText(R.string.tab_3) .setTabListener(new TabListener&lt;Tab_Fragment_3&gt;( this, "tab_3", Tab_Fragment_3.class)); actionBar.addTab(tab); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. Log.d(TAG, "msg-2"); getMenuInflater().inflate(R.menu.main, menu); Log.d(TAG, "msg-3"); return true; } public static class TabListener&lt;T extends Fragment&gt; implements ActionBar.TabListener { private Fragment mFragment; private final Activity mActivity; private final String mTag; private final Class&lt;T&gt; 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&lt;T&gt; clz) { mActivity = activity; mTag = tag; mClass = clz; } /* The following are each of the ActionBar.TabListener callbacks */ 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); } } 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. } } public void clickbutton(View v) { Log.d(TAG, "button clicked"); //to do? } } </code></pre> <p>activity_main.xml</p> <pre><code> &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" &gt; &lt;/RelativeLayout&gt; </code></pre> <p>Tab_Fragment_1 class:</p> <pre><code>public class Tab_Fragment_1 extends Fragment{ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub View view = inflater.inflate(R.layout.tab_fragment_1,container, false); return view; } } </code></pre> <p>tab_fragment_1:</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="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:background="@color/Azure"&gt; &lt;Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button" android:onClick="clickbutton" /&gt; &lt;/LinearLayout&gt; </code></pre>
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    1. COUse FrameLayout instead of Relative layout in activity_main.xml
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      1. POHow to change fragment inside same tab under ActionBar?
      1. USSino Raj
    2. COThank you Sino. Do you know how I can change the fragment under same tab?
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