(Android) Action Bar

1.manifest.xml

<!--
Beginning with Android 3.0 (API level 11), the action bar is included in all activities that use the Theme.Holo theme
(or one of its descendants), which is the default theme when either the targetSdkVersion or minSdkVersion attribute
is set to "11" or greater.
-->

<!-- Example -->
<manifest ... >
    <uses-sdk android:minSdkVersion="4"
              android:targetSdkVersion="11" />
    ...
</manifest>

<!-- REQUIRED HOLO THEME FOR THE ACTION BAR TO LOAD -->
<application
    ....
    ....
    android:theme="@android:style/Theme.Holo.Light"
    ....


<!-- Removing the action bar -->
<activity android:theme="@android:style/Theme.Holo.NoActionBar">

<!-- Android 4.0 (API level 14) and higher, "split action bar" (In earlier versions system just ignores this) -->
          android:uiOptions="splitActionBarWhenNarrow">
            
</activity>

2.sampleMenuResource.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/menu_search"
          android:title="@string/menu_search"
          android:icon="@drawable/ic_menu_search"
          
          //Use showAsAction="ifRoom" to show it on the action bar (will show if there is room available)
          android:showAsAction="ifRoom"
          
          //OR if want to show it no matter what
          android:showAsAction="always"
          
          
          //If you have an icon and you want to set a text also the withText also:
          android:showAsAction="ifRoom|withText"
          //(text will appear if there is enough space available)
          
          
          //An action view is a widget that appears in the action bar as a substitute for an action item button.
          //The below example is available on Android (classical collapsable search view)
          android:actionViewClass="android.widget.SearchView"
          //You can set
          android:showAsAction="ifRoom|collapseActionView"
          //declares that the action view should be collapsed into a button.
          //When the user selects the button, the action view expands
          />
</menu>

3.actionBar.java

//Might need this
getWindow().requestFeature(Window.FEATURE_ACTION_BAR);


//Get the action bar
ActionBar actionBar = getActionBar();

//You can hide it by code
actionBar.hide();
//Or show it
actionBar.show();

actionBar.setHomeButtonEnabled(true);       //enable or disable the Home button in the action bar

actionBar.setDisplayHomeAsUpEnabled(true);  //Enable UP navigation



// When the activity first starts, the system populates the action bar and overflow menu by calling
// onCreateOptionsMenu() for your activity.

//YOU CAN ALSO USE onCreate() just to load the action bar

//Make an actionbar layout and load it like so
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.main_activity, menu);
    return true;
}

//When the user selects an action item, your activity receives a call to onOptionsItemSelected(),
//passing the ID supplied by the android:id attribute
@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.home:
            // app icon in action bar clicked; go home
            Intent intent = new Intent(this, SomeActivity.class);
            
            //With this flag, if the activity you're starting already exists in the current task,
            //then all activities on top of it are destroyed and it is brought to the front
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            
            //OR in case the user can enter the current activity from another application
            //you should add the FLAG_ACTIVITY_NEW_TASK flag.
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(intent);
            return true;
        default:
            return super.onOptionsItemSelected(item);
    }
}

//You can also change the text which is displayed alongside the application icon at runtime.
actionBar.setSubtitle("mytest");
actionBar.setTitle("Some Title");


//Background of the actionbar
Drawable d = getResources().getDrawable(R.drawable.background_image_name);  
actionBar.setBackgroundDrawable(d);
//See here for more options
//http://android-developers.blogspot.gr/2011/04/customizing-action-bar.html

4.addCustomViewToActionBar.java

/*
You can also add a custom View to the ActionBar. For this you use the setCustomView method for the ActionView class.
You also have to enable the display of custom views via the setDisplayOptions() method
by passing in the ActionBar.DISPLAY_SHOW_CUSTOM flag.
*/

/*******************************
//The layout

<?xml version="1.0" encoding="utf-8"?>
<EditText xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/searchfield"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:inputType="textFilter" >

</EditText> 
*******************************/

ActionBar actionBar = getActionBar();
// add the custom view to the action bar

actionBar.setCustomView(R.layout.actionBarEditText_layout);

//Get the edit text
EditText search = (EditText) actionBar.getCustomView().findViewById(R.id.searchfield);

//Attach a listener to the custon view
search.setOnEditorActionListener(new OnEditorActionListener() {

      @Override
      public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
        Toast.makeText(MainActivity.this, "Search triggered", Toast.LENGTH_LONG).show();
        return false;
      }
      
    });

//set options to display the custom view
actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM | ActionBar.DISPLAY_SHOW_HOME);

5.contextualActionBar.java

/*
A contextual action mode activates a temporary ActionBar that overlays the application's ActionBar
for the duration of a particular sub-task.

For example use this feature to replace an action item with a ProgressBar view.
*/


//The following activity replace the icon at runtime with an action view which contains a ProgressBar view.

  public class MainActivity extends Activity {

  private MenuItem menuItem;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    
    super.onCreate(savedInstanceState);
    
    setContentView(R.layout.activity_main);     //Load the activity's layout
    
    ActionBar actionBar = getActionBar();
    actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_HOME | ActionBar.DISPLAY_SHOW_TITLE | ActionBar.DISPLAY_SHOW_CUSTOM);
  }


  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    
    switch (item.getItemId()) 
    {
      case R.id.menu_load:                               //The icon's id we want to replace
          menuItem = item;
          
          //Set the temporary view on the action bar
          menuItem.setActionView(R.layout.progressbar); //Replace it with this
          menuItem.expandActionView();
          
          //Do whatever task you want
          TestTask task = new TestTask();
          task.execute("test");
          break;
      default:
          break;
    }
    
    return true;
  }

  private class TestTask extends AsyncTask<String, Void, String> {

    @Override
    protected String doInBackground(String... params) {
      // Simulate something long running
      try {
        Thread.sleep(2000);
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
      return null;
    }

    @Override
    protected void onPostExecute(String result) {
      
      //WE'RE DONE. REMOVE THE ACTION VIEW
      menuItem.collapseActionView();
      menuItem.setActionView(null);
    }
  };
} 


/**************************************************************
 * Layout for the progress bar
 * 
<?xml version="1.0" encoding="utf-8"?>
<ProgressBar xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/progressBar2"
        android:layout_width="wrap_content"
     android:layout_height="wrap_content">
        
</ProgressBar> 
*
* *************************************************************/

6.tabsInActionBar.java

public class MainActivity extends FragmentActivity implements
    ActionBar.TabListener {

/**
   * The serialization (saved instance state) Bundle key representing the
   * current tab position.
   */


  private static final String STATE_SELECTED_NAVIGATION_ITEM = "selected_navigation_item";

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    setContentView(R.layout.activity_main);

    // Set up the action bar to show tabs.
    final ActionBar actionBar = getActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    // For each of the sections in the app, add a tab to the action bar.
    actionBar.addTab(actionBar.newTab().setText(R.string.title_section1).setTabListener(this));
    
    actionBar.addTab(actionBar.newTab().setText(R.string.title_section2).setTabListener(this));
    
    actionBar.addTab(actionBar.newTab().setText(R.string.title_section3).setTabListener(this));
  }


  @Override
  public void onRestoreInstanceState(Bundle savedInstanceState) {
    // Restore the previously serialized current tab position.
    if (savedInstanceState.containsKey(STATE_SELECTED_NAVIGATION_ITEM)) {
      getActionBar().setSelectedNavigationItem(savedInstanceState.getInt(STATE_SELECTED_NAVIGATION_ITEM));
    }
  }

  @Override
  public void onSaveInstanceState(Bundle outState) {
    // Serialize the current tab position.
    outState.putInt(STATE_SELECTED_NAVIGATION_ITEM, getActionBar().getSelectedNavigationIndex());
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
  }

  @Override
  public void onTabSelected(ActionBar.Tab tab,
      FragmentTransaction fragmentTransaction) {
    // When the given tab is selected, show the tab contents in the
    // container view.

    Bundle args = new Bundle();
    args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, tab.getPosition() + 1);
    
    Fragment fragment = new DummySectionFragment();
    fragment.setArguments(args);
    
    getFragmentManager().beginTransaction().replace(R.id.container, fragment).commit();
  }

  @Override
  public void onTabUnselected(ActionBar.Tab tab,
      FragmentTransaction fragmentTransaction) {
  }

  @Override
  public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
    
  }

  
/**
   * A dummy fragment representing a section of the app
   */

  public static class DummySectionFragment extends Fragment {
    public static final String ARG_SECTION_NUMBER = "placeholder_text";

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
      
      TextView textView = new TextView(getActivity());
      textView.setGravity(Gravity.CENTER);
      textView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));
      return textView;
    }
  }

} 

7.spinnerInActionBar.java

public class MainActivity extends FragmentActivity implements
    ActionBar.OnNavigationListener {

/**
   * The serialization (saved instance state) Bundle key representing the
   * current dropdown position.
   */

  private static final String STATE_SELECTED_NAVIGATION_ITEM = "selected_navigation_item";

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    setContentView(R.layout.activity_main);

    // Set up the action bar to show a dropdown list.
    final ActionBar actionBar = getActionBar();
    actionBar.setDisplayShowTitleEnabled(false);
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);

    final String[] dropdownValues = getResources().getStringArray(R.array.dropdown);

    // Specify a SpinnerAdapter to populate the dropdown list.
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(actionBar.getThemedContext(),
        android.R.layout.simple_spinner_item, android.R.id.text1,
        dropdownValues);

    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    // Set up the dropdown list navigation in the action bar.
    actionBar.setListNavigationCallbacks(adapter, this);

    // Use getActionBar().getThemedContext() to ensure
    // that the text color is always appropriate for the action bar
    // background rather than the activity background.
  }

  @Override
  public void onRestoreInstanceState(Bundle savedInstanceState) {
    // Restore the previously serialized current dropdown position.
    if (savedInstanceState.containsKey(STATE_SELECTED_NAVIGATION_ITEM)) {
      getActionBar().setSelectedNavigationItem(savedInstanceState.getInt(STATE_SELECTED_NAVIGATION_ITEM));
    }
  }

  @Override
  public void onSaveInstanceState(Bundle outState) {
    // Serialize the current dropdown position.
    outState.putInt(STATE_SELECTED_NAVIGATION_ITEM, getActionBar().getSelectedNavigationIndex());
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
  }

  @Override
  public boolean onNavigationItemSelected(int position, long id) {
    // When the given dropdown item is selected, show its contents in the
    // container view.
    Fragment fragment = new DummySectionFragment();
    Bundle args = new Bundle();
    args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
    fragment.setArguments(args);
    getFragmentManager().beginTransaction().replace(R.id.container, fragment).commit();
    return true;
  }

  
/**
   * A dummy fragment
   */

  public static class DummySectionFragment extends Fragment {

    public static final String ARG_SECTION_NUMBER = "placeholder_text";

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
      
      TextView textView = new TextView(getActivity());
      textView.setGravity(Gravity.CENTER);
      textView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));
      return textView;
    }
  }

} 

8.simpleSpinner.java

final String[] actions = new String[] {
             	 "About",
       	         "Terms & Conditions",
       	         "Privacy Policy"
       	     };
       	     
       	     /** Create an array adapter to populate dropdownlist */
       	        ArrayAdapter<String> adapter = new ArrayAdapter<String>(getBaseContext(), android.R.layout.simple_spinner_dropdown_item, actions);
       	 
       	        /** Enabling dropdown list navigation for the action bar */
       	        getActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
       	 
       	        /** Defining Navigation listener */
       	        ActionBar.OnNavigationListener navigationListener = new OnNavigationListener() {
       	 
       	            @Override
       	            public boolean onNavigationItemSelected(int itemPosition, long itemId) {
       	                
       	            	if (actions[itemPosition] == "About")
       	                {
       	            		
       	                }
       	            	
       	                if (actions[itemPosition] == "Terms & Conditions")
       	                {
       	                	Intent intent = new Intent(DashboardActivity.this, WebActivity.class);
       	                	intent.putExtra(URL, getString(R.string.terms_url));
       	                	startActivity(intent);
       	                }
       	                
       	                if (actions[itemPosition] == "Privacy Policy")
       	                {
       	                	Intent intent = new Intent(DashboardActivity.this, WebActivity.class);
	       	             	intent.putExtra(URL, getString(R.string.privacy_url));
	       	             	startActivity(intent);
       	                }
       	                return false;
       	            }
       	        };
       	 
       	        /** Setting dropdown items and item navigation listener for the actionbar */
       	        getActionBar().setListNavigationCallbacks(adapter, navigationListener);