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, 
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