How can I set the title programmatically

How can I set the current view title(by title I mean th开发者_如何学Goe text shown below battery & time(in the image below that would be "Menu Sample") programmatically? I found many examples using manifest file but none from code.

Activity.setTitle() - setTitle("My New Awesome Title!");

Like this

public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        this.setTitle("This is my Title");


    }

requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.foo_layout);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title_bar); 

or

youractivity.setTitle();

ActionBar actionBar = getActionBar();
actionBar.setSubtitle("mytest");
actionBar.setTitle("Hello"); 

** targetSdkVersion or minSdkVersion attribute is set to "11" or greater.

<manifest ... >
    <uses-sdk android:minSdkVersion="11" ... />
    ...
</manifest>

I use this to change actionBar's text pragmatically in onCreate() method

getSupportActionBar().setTitle("yourString");