Code example for ActionBar.LayoutParams

0
		super.onCreate(savedInstanceState);
 
		// Create a progress bar to display while the list loads 
		ProgressBar progressBar = new ProgressBar(this);
		progressBar.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
				LayoutParams.WRAP_CONTENT, Gravity.CENTER));
		progressBar.setIndeterminate(true);
		getListView().setEmptyView(progressBar);
 
		// Must add the progress bar to the root of the layout 
		ViewGroup root = (ViewGroup) findViewById(android.R.id.content);
		root.addView(progressBar);
 
		// For the cursor adapter, specify which columns go into which views 
		String[] fromColumns = { ContactsContract.Data.DISPLAY_NAME };
		int[] toViews = { android.R.id.text1 }; // The TextView in
												// simple_list_item_1 
 
		// Create an empty adapter we will use to display the loaded data. 
		// We pass null for the cursor, then update it in onLoadFinished() 
		mAdapter = new SimpleCursorAdapter(this,