1 package com.android.contacts.common.util; 2 3 4 import com.android.contacts.common.R; 5 6 import android.content.res.Resources; 7 import android.view.View; 8 import android.widget.ListView; 9 10 /** 11 * Utilities for configuring ListViews with a card background. 12 */ 13 public class ContactListViewUtils { 14 15 // These two constants will help add more padding for the text inside the card. 16 private static final double TEXT_LEFT_PADDING_TO_CARD_PADDING_RATIO = 1.1; 17 18 private static void addPaddingToView(ListView listView, int parentWidth, 19 int listSpaceWeight, int listViewWeight) 20 { 21 if (listSpaceWeight > 0 && listViewWeight > 0) { 22 double paddingPercent = (double) listSpaceWeight / (double) 23 (listSpaceWeight * 2 + listViewWeight); 24 listView.setPadding( 25 (int) (parentWidth * paddingPercent * TEXT_LEFT_PADDING_TO_CARD_PADDING_RATIO), 26 listView.getPaddingTop(), 27 (int) (parentWidth * paddingPercent * TEXT_LEFT_PADDING_TO_CARD_PADDING_RATIO), 28 listView.getPaddingBottom()); 29 // The EdgeEffect and ScrollBar need to span to the edge of the ListView's padding. 30 listView.setClipToPadding(false); 31 listView.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY); 32 } 33 } 34 35 /** 36 * Add padding to {@param listView} if this configuration has set both space weight and 37 * view weight on the layout. Use this util method instead of defining the padding in the 38 * layout file so that the {@param listView}'s padding can be set proportional to the card 39 * padding. 40 * 41 * @param resources 42 * @param listView ListView that we add padding to 43 * @param rootLayout layout that contains ListView and R.id.list_card 44 */ 45 public static void applyCardPaddingToView(Resources resources, 46 final ListView listView, final View rootLayout) { 47 // Set a padding on the list view so it appears in the center of the card 48 // in the layout if required. 49 final int listSpaceWeight = resources.getInteger( 50 R.integer.contact_list_space_layout_weight); 51 final int listViewWeight = resources.getInteger( 52 R.integer.contact_list_card_layout_weight); 53 if (listSpaceWeight > 0 && listViewWeight > 0) { 54 rootLayout.setBackgroundResource(0); 55 // Set the card view visible 56 View mCardView = rootLayout.findViewById(R.id.list_card); 57 if (mCardView == null) { 58 throw new RuntimeException( 59 "Your content must have a list card view who can be turned visible " + 60 "whenever it is necessary."); 61 } 62 mCardView.setVisibility(View.VISIBLE); 63 // Add extra padding to the list view to make them appear in the center of the card. 64 // In order to avoid jumping, we skip drawing the next frame of the ListView. 65 SchedulingUtils.doOnPreDraw(listView, /* drawNextFrame = */ false, new Runnable() { 66 @Override 67 public void run() { 68 // Use the rootLayout.getWidth() instead of listView.getWidth() since 69 // we sometimes hide the listView until we finish loading data. This would 70 // result in incorrect padding. 71 ContactListViewUtils.addPaddingToView( 72 listView, rootLayout.getWidth(), listSpaceWeight, listViewWeight); 73 } 74 }); 75 } 76 } 77 } 78
