Android ActionBar (Official Guide)

Install ActionBar:

Support Android 3.0 and Above Only (Only Versions later than 3.0 are supported)

      
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Support Android 2.1 and Above (if you want applications to Support version 3.1, You need to perform the following operations)
1. Install the v7 appcompat Library
2 Update your activity so that it extends ActionBarActivity. For example:

public class MainActivity extends ActionBarActivity { ... }

3In your manifest file, update either the element or individual elements to use one of the Theme. AppCompat themes. For example:

Adding Action Buttons (add ActionBar ):

1. Specify the Actions in XML

Version 3.0 or later:

Version 2.0 or later:

      
       
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2. Add the Actions to the Action Bar: Make ActionBar take effect

@Overridepublic boolean onCreateOptionsMenu(Menu menu) {    // Inflate the menu items for use in the action bar    MenuInflater inflater = getMenuInflater();    inflater.inflate(R.menu.main_activity_actions, menu);    return super.onCreateOptionsMenu(menu);}

3. Respond to Action Buttons corresponding ActionBar event

@Overridepublic boolean onOptionsItemSelected(MenuItem item) {    // Handle presses on the action bar items    switch (item.getItemId()) {        case R.id.action_search:            openSearch();            return true;        case R.id.action_settings:            openSettings();            return true;        default:            return super.onOptionsItemSelected(item);    }}

Add Up Button for Low-level Activities: Add the action Button for returning to the previous Activity:

1. Whether it is version 4.0 or later or use ActionBarActivity to support databases:

Added the android: parentActivityName attribute.

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Call setDisplayHomeAsUpEnabled ():

@Overridepublic void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_displaymessage);    getSupportActionBar().setDisplayHomeAsUpEnabled(true);    // If your minSdkVersion is 11 or higher, instead use:    // getActionBar().setDisplayHomeAsUpEnabled(true);}

Because the android: parentActivityName attribute is set, the system knows the parent Activity to be returned, so you do not need to set event listening.

Styling the Action Bar (set the ActionBar style ):

Use an Android Theme (when using the supported libraries, they are as follows, corresponding to the unsupported libraries in brackets)
When using the Support Library, you must instead use the Theme. AppCompat themes:
Theme. AppCompat for the "dark" theme. (Theme. Holo)
Theme. AppCompat. Light for the "light" theme. (Theme. Holo. Light)
Theme. AppCompat. Light. DarkActionBar for the light theme with a dark action bar. (Theme. Holo. Light. DarkActionBar)

Customize the Background (change the Background of the ActionBar)

For Android 3.0 and higher only:

1. Define the resource file: res/values/themes. xml

2. Then apply your theme to your entire app or individual activities (reference resource file ):

For Android 2.1 and higher：1.res/values/themes.xml：                        
      
       
       
       
   
  

2. Then apply your theme to your entire app or individual activities:

Customize the Text Color (custom ActionBar font Color)

For Android 3.0 and higher only:

Res/values/themes. xml:

For Android 2.1 and higher (When using the Support Library, your style XML file might look like this :):

Res/values/themes. xml

Customize the Tab Indicator (custom Tab TabHost style, using selector)

Res/drawable/actionbar_tab_indicator.xml:

Then:

For Android 3.0 and higher only:

Res/values/themes. xml:

For Android 2.1 and higher:

Res/values/themes. xml:

Overlaying the Action Bar (automatically hiding the ActionBar ):

Enable Overlay Mode (Auto Hide Mode ):

For Android 3.0 and higher only:

Then apply your theme to your entire app or individual activities:

For Android 2.1 and higher:

Then apply your theme to your entire app or individual activities:

Specify Layout Top-margin (top left blank to avoid contact with ActionBar ):

No supported libraries are used:

                
  
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Supported libraries are used:

                
  
  
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