Java 名称在列表视图项中出现两次
我试图设置一个两行列表视图,但每个字符串似乎都在项目中复制自己,而不是显示一次。我怎样才能防止这种情况发生?i、 e.我需要数据如下显示:对于第1项-美国,美国描述,而不是美国,美国;对于项目2-欧洲,欧洲描述,而不是欧洲,欧洲。请参阅屏幕截图以了解不希望出现的结果的证据 ListData.javaJava 名称在列表视图项中出现两次,java,android,arrays,android-listfragment,Java,Android,Arrays,Android Listfragment,我试图设置一个两行列表视图,但每个字符串似乎都在项目中复制自己,而不是显示一次。我怎样才能防止这种情况发生?i、 e.我需要数据如下显示:对于第1项-美国,美国描述,而不是美国,美国;对于项目2-欧洲,欧洲描述,而不是欧洲,欧洲。请参阅屏幕截图以了解不希望出现的结果的证据 ListData.java public class ListData { public static final int[][] items = { {R.string.america,R.
public class ListData {
public static final int[][] items = {
{R.string.america,R.string.america_description},
{R.string.europe, R.string.europe_description}
};
}
public class ItemListAdapter extends BaseAdapter implements Filterable {
private List<String> mData;
private List<String> mFilteredData;
private LayoutInflater mInflater;
private ItemFilter mFilter;
public ItemListAdapter (List<String> data, Context context) {
mData = data;
mFilteredData = data;
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return mFilteredData.size();
}
@Override
public String getItem(int position) {
return mFilteredData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
String strItem = mFilteredData.get(position);
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item_row, parent, false);
holder = new ViewHolder();
holder.mTitle = (TextView) convertView.findViewById(R.id.item_title);
holder.mDescription = (TextView) convertView.findViewById(R.id.item_description);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.mTitle.setText(strItem);
holder.mDescription.setText(strItem);
return convertView;
}
@Override
public Filter getFilter() {
if (mFilter == null) {
mFilter = new ItemFilter();
}
return mFilter;
}
/**
* View holder
*/
static class ViewHolder {
private TextView mTitle;
private TextView mDescription;
}
/**
* Filter for filtering list items
*/
private class ItemFilter extends Filter {
/**
* Invoked on a background thread. This is where all the filter logic should go
* @param constraint the constraint to filter on
* @return the resulting list after applying the constraint
*/
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
if (TextUtils.isEmpty(constraint)) {
results.count = mData.size();
results.values = mData;
} else {
//Create a new list to filter on
List<String> resultList = new ArrayList<>();
for (String str : mData) {
if (str.toLowerCase().contains(constraint.toString().toLowerCase())) {
resultList.add(str);
}
}
results.count = resultList.size();
results.values = resultList;
}
return results;
}
/**
* Runs on ui thread
* @param constraint the constraint used for the result
* @param results the results to display
*/
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
if (results.count == 0) {
notifyDataSetInvalidated();
} else {
mFilteredData = (ArrayList<String>)results.values;
notifyDataSetChanged();
}
}
}
}
ListViewAdapter
public class ItemListAdapter extends BaseAdapter implements Filterable {
private List<String> mData;
private List<String> mFilteredData;
private LayoutInflater mInflater;
private ItemFilter mFilter;
public ItemListAdapter (List<String> data, Context context) {
mData = data;
mFilteredData = data;
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return mFilteredData.size();
}
@Override
public String getItem(int position) {
return mFilteredData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
String strItem = mFilteredData.get(position);
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item_row, parent, false);
holder = new ViewHolder();
holder.mTitle = (TextView) convertView.findViewById(R.id.item_title);
holder.mDescription = (TextView) convertView.findViewById(R.id.item_description);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.mTitle.setText(strItem);
holder.mDescription.setText(strItem);
return convertView;
}
@Override
public Filter getFilter() {
if (mFilter == null) {
mFilter = new ItemFilter();
}
return mFilter;
}
/**
* View holder
*/
static class ViewHolder {
private TextView mTitle;
private TextView mDescription;
}
}
公共类ItemListAdapter扩展BaseAdapter实现可过滤{
私有列表数据;
私人名单;
私人停车场;
私有项目过滤器;
公共ItemListAdapter(列表数据、上下文){
mData=数据;
mFilteredData=数据;
mInflater=(LayoutInflater)context.getSystemService(context.LAYOUT\u充气机\u服务);
}
@凌驾
public int getCount(){
返回mFilteredData.size();
}
@凌驾
公共字符串getItem(int位置){
返回mFilteredData.get(位置);
}
@凌驾
公共长getItemId(int位置){
返回位置;
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
String strItem=mFilteredData.get(位置);
视窗座;
if(convertView==null){
convertView=mInflater.充气(R.layout.item_行,父项,false);
holder=新的ViewHolder();
holder.mTitle=(TextView)convertView.findViewById(R.id.item_title);
holder.mddescription=(TextView)convertView.findViewById(R.id.item_description);
convertView.setTag(支架);
}否则{
holder=(ViewHolder)convertView.getTag();
}
holder.mTitle.setText(strItem);
holder.mDescription.setText(strItem);
返回视图;
}
@凌驾
公共过滤器getFilter(){
if(mFilter==null){
mFilter=newitemfilter();
}
返回过滤器;
}
/**
*视图持有者
*/
静态类视窗夹{
私有文本视图mTitle;
私有文本视图mddescription;
}
}
item_row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:minHeight="?android:attr/listPreferredItemHeight"
android:paddingRight="?android:attr/scrollbarSize"
android:baselineAligned="false">
<RelativeLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView android:id="@+id/item_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:ellipsize="marquee"
android:textColor="?android:attr/textColorPrimary" />
<TextView android:id="@+id/item_description"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/item_title"
android:layout_alignLeft="@id/item_title"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="?android:attr/textColorSecondary" />
</RelativeLayout>
</LinearLayout>
ItemListadapter.java
public class ListData {
public static final int[][] items = {
{R.string.america,R.string.america_description},
{R.string.europe, R.string.europe_description}
};
}
public class ItemListAdapter extends BaseAdapter implements Filterable {
private List<String> mData;
private List<String> mFilteredData;
private LayoutInflater mInflater;
private ItemFilter mFilter;
public ItemListAdapter (List<String> data, Context context) {
mData = data;
mFilteredData = data;
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return mFilteredData.size();
}
@Override
public String getItem(int position) {
return mFilteredData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
String strItem = mFilteredData.get(position);
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item_row, parent, false);
holder = new ViewHolder();
holder.mTitle = (TextView) convertView.findViewById(R.id.item_title);
holder.mDescription = (TextView) convertView.findViewById(R.id.item_description);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.mTitle.setText(strItem);
holder.mDescription.setText(strItem);
return convertView;
}
@Override
public Filter getFilter() {
if (mFilter == null) {
mFilter = new ItemFilter();
}
return mFilter;
}
/**
* View holder
*/
static class ViewHolder {
private TextView mTitle;
private TextView mDescription;
}
/**
* Filter for filtering list items
*/
private class ItemFilter extends Filter {
/**
* Invoked on a background thread. This is where all the filter logic should go
* @param constraint the constraint to filter on
* @return the resulting list after applying the constraint
*/
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
if (TextUtils.isEmpty(constraint)) {
results.count = mData.size();
results.values = mData;
} else {
//Create a new list to filter on
List<String> resultList = new ArrayList<>();
for (String str : mData) {
if (str.toLowerCase().contains(constraint.toString().toLowerCase())) {
resultList.add(str);
}
}
results.count = resultList.size();
results.values = resultList;
}
return results;
}
/**
* Runs on ui thread
* @param constraint the constraint used for the result
* @param results the results to display
*/
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
if (results.count == 0) {
notifyDataSetInvalidated();
} else {
mFilteredData = (ArrayList<String>)results.values;
notifyDataSetChanged();
}
}
}
}
公共类ItemListAdapter扩展BaseAdapter实现可过滤{
私有列表数据;
私人名单;
私人停车场;
私有项目过滤器;
公共ItemListAdapter(列表数据、上下文){
mData=数据;
mFilteredData=数据;
mInflater=(LayoutInflater)context.getSystemService(context.LAYOUT\u充气机\u服务);
}
@凌驾
public int getCount(){
返回mFilteredData.size();
}
@凌驾
公共字符串getItem(int位置){
返回mFilteredData.get(位置);
}
@凌驾
公共长getItemId(int位置){
返回位置;
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
String strItem=mFilteredData.get(位置);
视窗座;
if(convertView==null){
convertView=mInflater.充气(R.layout.item_行,父项,false);
holder=新的ViewHolder();
holder.mTitle=(TextView)convertView.findViewById(R.id.item_title);
holder.mddescription=(TextView)convertView.findViewById(R.id.item_description);
convertView.setTag(支架);
}否则{
holder=(ViewHolder)convertView.getTag();
}
holder.mTitle.setText(strItem);
holder.mDescription.setText(strItem);
返回视图;
}
@凌驾
公共过滤器getFilter(){
if(mFilter==null){
mFilter=newitemfilter();
}
返回过滤器;
}
/**
*视图持有者
*/
静态类视窗夹{
私有文本视图mTitle;
私有文本视图mddescription;
}
/**
*用于筛选列表项的筛选器
*/
私有类ItemFilter扩展了筛选器{
/**
*在后台线程上调用。这是所有筛选器逻辑应该去的地方
*@param constraint要筛选的约束
*@应用约束后返回结果列表
*/
@凌驾
受保护的筛选器结果性能筛选(CharSequence约束){
FilterResults results=新的FilterResults();
if(TextUtils.isEmpty(约束)){
results.count=mData.size();
结果.values=mData;
}否则{
//创建要筛选的新列表
List resultList=new ArrayList();
for(字符串str:mData){
if(str.toLowerCase().contains(constraint.toString().toLowerCase())){
结果列表添加(str);
}
}
results.count=resultList.size();
results.values=结果列表;
}
返回结果;
}
/**
*在ui线程上运行
*@param constraint用于结果的约束
*@param results要显示的结果
*/
@抑制警告(“未选中”)
@凌驾
受保护的void publishResults(CharSequence约束、FilterResults结果){
如果(results.count==0){
notifyDataSetionValidated();
}否则{
mFilteredData=(ArrayList)results.values;
notifyDataSetChanged();
}
}
}
}
名称在
列表视图中显示两次,因为您同时传入文本视图
相同的项目:
String strItem = mFilteredData.get(position);
为了避免这种情况,需要使用两个单独的字段传递给y