每次点击Android中的视图时，都会产生系统视觉效果。在棒棒糖中它起了涟漪作用。当我创建ListView并将其与普通的ArrayAdapter相关联时，会出现此效果。现在我已经添加了自定义ListView，这种效果就会丢失。
现在，我已经尝试找出问题所在，并且因为使用相同的列表项布局和默认适配器工作得很好，我会说问题出在我的自定义适配器上。
我已经看到很多与这种情况相关的解决方案，只是实现了涟漪效应，并调用了一些可绘制的东西;这不是我想要做的。涟漪效应的显示只是因为我在Android 5上运行应用程序，现在我要做的是在我们的项目被点击时具有默认的系统突出显示效果。
以下是我的自定义适配器的（希望）相关部分：
public class CustomCardSetsAdapter extends BaseAdapter {
List<Card> totalList;
ArrayList<Boolean> hiddenItems;
ListView parentLV;
Integer curPosition = -1;
public static int selectedRowIndex;
public CustomCardSetsAdapter(CardSets cardList, ListView parentListView)
{
this.parentLV = parentListView;
assignSetValues(cardList);
totalList = cardList.getBlackrockMountain();
totalList.addAll(cardList.getClassic());
totalList.addAll(cardList.getCurseofNaxxramas());
totalList.addAll(cardList.getGoblinsvsGnomes());
Collections.sort(totalList,
new Comparator<Card>() {
public int compare(Card f1, Card f2) {
return f1.toString().compareTo(f2.toString());
}
});
hiddenItems = new ArrayList<>();
for (int i = 0; i < totalList.size(); i++) {
if(!totalList.get(i).getCollectible())
hiddenItems.add(true);
else
hiddenItems.add(false);
}
}
@Override
public int getCount() {
return (totalList.size() - getHiddenCount());
}
@Override
public View getView(final int position, View convertView, final ViewGroup parent) {
final int index = getRealPosition(position);
if(convertView == null) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
convertView = inflater.inflate(R.layout.card_list_item, parentLV, false);
}
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Integer prevPosition = curPosition;
curPosition = position;
if(prevPosition >= parentLV.getFirstVisiblePosition() &&
prevPosition <= parentLV.getLastVisiblePosition())
{
View view = parentLV.getChildAt(prevPosition- parentLV.getFirstVisiblePosition());
parentLV.getAdapter().getView(prevPosition,view, parentLV);
}
v.setBackgroundColor(Color.WHITE);
}
});
Card curCard = totalList.get(index);
TextView cardName = (TextView) convertView.findViewById(R.id.cardName);
cardName.setText(curCard.getName());
setRarityColor(curCard,cardName);
TextView manaCost = (TextView) convertView.findViewById(R.id.manaCost);
manaCost.setText((curCard.getCost()).toString());
ImageView setIcon = (ImageView) convertView.findViewById(R.id.setIcon);
setSetIcon(curCard,setIcon);
if(position == curPosition)
convertView.setBackgroundColor(Color.WHITE);
else
convertView.setBackgroundColor(Color.TRANSPARENT);
return convertView;
}
@Override
public int getItemViewType(int position) {
return R.layout.card_list_item;
}
@Override
public int getViewTypeCount() {
return 1;
}
@Override
public boolean isEmpty() {
return false;
}
private int getHiddenCount()
{
int count = 0;
for(int i = 0;i <totalList.size();i++)
if(hiddenItems.get(i))
count++;
return count;
}
private int getRealPosition(int position) {
int hElements = getHiddenCountUpTo(position);
int diff = 0;
for(int i=0;i<hElements;i++) {
diff++;
if(hiddenItems.get(position+diff))
i--;
}
return (position + diff);
}
private int getHiddenCountUpTo(int location) {
int count = 0;
for(int i=0;i<=location;i++) {
if(hiddenItems.get(i))
count++;
}
return count;
}
}
提前致谢。
答案 0 :(得分：7)
，添加：
android:drawSelectorOnTop="true"
我也认为你使用的适配器错了......
使用适配器上的ViewHolder模式：
public class CustomCardSetsAdapter extends BaseAdapter {
List<Card> totalList;
ArrayList<Boolean> hiddenItems;
ListView parentLV;
Integer curPosition = -1;
public static int selectedRowIndex;
private class ViewHolderRow{
TextView cardName;
TextView manaCost;
ImageView setIcon;
}
public CustomCardSetsAdapter(CardSets cardList, ListView parentListView)
{
this.parentLV = parentListView;
assignSetValues(cardList);
totalList = cardList.getBlackrockMountain();
totalList.addAll(cardList.getClassic());
totalList.addAll(cardList.getCurseofNaxxramas());
totalList.addAll(cardList.getGoblinsvsGnomes());
Collections.sort(totalList,
new Comparator<Card>() {
public int compare(Card f1, Card f2) {
return f1.toString().compareTo(f2.toString());
}
});
hiddenItems = new ArrayList<>();
for (int i = 0; i < totalList.size(); i++) {
if(!totalList.get(i).getCollectible())
hiddenItems.add(true);
else
hiddenItems.add(false);
}
}
@Override
public int getCount() {
return (totalList.size() - getHiddenCount());
}
@Override
public View getView(final int position, View convertView, final ViewGroup parent) {
final int index = getRealPosition(position);
ViewHolderRow theRow;
if(convertView == null) {
theRow = new ViewHolderRow();
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
convertView = inflater.inflate(R.layout.card_list_item, parentLV, false);
// Cache your views
theRow.cardName = (TextView) convertView.findViewById(R.id.cardName);
theRow.manaCost = (TextView) convertView.findViewById(R.id.manaCost);
theRow.setIcon = (ImageView) convertView.findViewById(R.id.setIcon);
// Set the Tag to the ViewHolderRow
convertView.setTag(theRow);
}else{
// get the Row to re-use
theRow = (ViewHolderRow) convertView.getTag();
}
//... Removed convertView.setOnClickListener
Card curCard = totalList.get(index);
// Set Items
theRow.cardName.setText(curCard.getName());
setRarityColor(curCard,theRow.cardName);
theRow.manaCost.setText((curCard.getCost()).toString());
setSetIcon(curCard,theRow.setIcon);
if(position == curPosition){
convertView.setBackgroundColor(Color.WHITE);
}else{
convertView.setBackgroundColor(Color.TRANSPARENT);
}
return convertView;
}
@Override
public int getItemViewType(int position) {
return R.layout.card_list_item;
}
@Override
public int getViewTypeCount() {
return 1;
}
@Override
public boolean isEmpty() {
return false;
}
private int getHiddenCount()
{
int count = 0;
for(int i = 0;i <totalList.size();i++)
if(hiddenItems.get(i))
count++;
return count;
}
private int getRealPosition(int position) {
int hElements = getHiddenCountUpTo(position);
int diff = 0;
for(int i=0;i<hElements;i++) {
diff++;
if(hiddenItems.get(position+diff))
i--;
}
return (position + diff);
}
private int getHiddenCountUpTo(int location) {
int count = 0;
for(int i=0;i<=location;i++) {
if(hiddenItems.get(i))
count++;
}
return count;
}
}
设置onListItemClickListener而不是在整个convertView上使用它...
yourListView.setOnItemClickListener(ListListener);
private final OnItemClickListener ListListener = new OnItemClickListener{
@Override
public void onItemClick(AdapterView<?> arg0, View view, int position, long arg3) {
// ... Do something on click
}
}