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, 
		        android.R.layout.simple_list_item_1, null,