在android列表视图中搜索
我已在每个listview项目中输入了企业名称、城市和地区。我在列表视图的顶部放置了一个编辑文本,用于搜索过程。 我想按企业名称、城市和地区搜索listview项目,我在编辑文本时使用了文本观察程序,并使用了过滤器;但这是行不通的。我该怎么办 这是我的代码: CustomerShowPointActivity.java:-在android列表视图中搜索,android,listview,android-listview,textwatcher,Android,Listview,Android Listview,Textwatcher,我已在每个listview项目中输入了企业名称、城市和地区。我在列表视图的顶部放置了一个编辑文本,用于搜索过程。 我想按企业名称、城市和地区搜索listview项目,我在编辑文本时使用了文本观察程序,并使用了过滤器;但这是行不通的。我该怎么办 这是我的代码: CustomerShowPointActivity.java:- ListView lv = (ListView) findViewById(R.id.list);
ListView lv = (ListView) findViewById(R.id.list);
final ShowPointAdapter adapter = new ShowPointAdapter(
CustomerShowPointActivity.this, item);
lv.setAdapter(adapter);
lv.setTextFilterEnabled(true);
lv.bringToFront();
// Locate the EditText in listview_main.xml
editsearch = (EditText) findViewById(R.id.et1);
// Capture Text in EditText
editsearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start,
int before, int count) {
}
@Override
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
String text = editsearch.getText().toString()
.toLowerCase(Locale.getDefault());
adapter.filter(text);
}
});
这是我的适配器类:-
public class ShowPointAdapter extends BaseAdapter {
// Declare Variables
Context mContext;
LayoutInflater mInflater;
private List<PointItem> item = null;
private ArrayList<PointItem> arraylist;
String search;
public ShowPointAdapter(Context context, List<PointItem> item) {
mContext = context;
this.item = item;
mInflater = LayoutInflater.from(mContext);
this.arraylist = new ArrayList<PointItem>();
this.arraylist.addAll(item);
}
public class ViewHolder {
TextView Bus_name;
TextView bus_area;
TextView bus_point;
}
@Override
public int getCount() {
return item.size();
}
@Override
public PointItem getItem(int position) {
return item.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public boolean isEnabled(int position) {
return false;
}
@Override
public View getView(final int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = mInflater.inflate(R.layout.customer_show_point_item, null);
holder.Bus_name = (TextView) view
.findViewById(R.id.item_bname);
holder.bus_area = (TextView) view
.findViewById(R.id.item_barea);
holder.bus_point = (TextView) view
.findViewById(R.id.bus_point);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
// set the result into textviews
holder.Bus_name.setText(item.get(position).getbus_name());
holder.bus_area.setText(item.get(position).getbus_area() + ", "
+ item.get(position).getbus_city());
holder.bus_point.setText(item.get(position).getcus_bus_point());
return view;
}
public void filter(String charText) {
// TODO Auto-generated method stub
charText = charText.toLowerCase(Locale.getDefault());
item.clear();
if (charText.length() == 0) {
item.addAll(arraylist);
} else {
for (PointItem it : arraylist) {
if (it.getbus_name().toLowerCase(Locale.getDefault())
.contains(charText)) {
item.add(it);
}
}
}
notifyDataSetChanged();
}
}
公共类ShowPointAdapter扩展了BaseAdapter{
//声明变量
语境;
拉平机;
私有列表项=null;
私有ArrayList ArrayList;
字符串搜索;
公共ShowPointAdapter(上下文,列表项){
mContext=上下文;
this.item=项目;
mInflater=LayoutInflater.from(mContext);
this.arraylist=新的arraylist();
this.arraylist.addAll(项);
}
公共类视图持有者{
TextView总线名称;
TextView巴士服务区;
TextView巴士站;
}
@凌驾
public int getCount(){
返回item.size();
}
@凌驾
公共点项目getItem(内部位置){
返回项目。获取(位置);
}
@凌驾
公共长getItemId(int位置){
返回位置;
}
公共布尔值isEnabled(整型位置){
返回false;
}
@凌驾
公共视图getView(最终整数位置、视图视图、视图组父视图){
最终持票人;
如果(视图==null){
holder=新的ViewHolder();
视图=最小平坦度。充气(R.layout.customer\u show\u point\u item,空);
holder.Bus_name=(TextView)视图
.findViewById(R.id.项目名称);
holder.bus_区域=(文本视图)视图
.findViewById(R.id.item_barea);
holder.bus_点=(文本视图)视图
.findViewById(R.id.bus_point);
视图.设置标签(支架);
}否则{
holder=(ViewHolder)view.getTag();
}
//将结果设置为文本视图
holder.Bus_name.setText(item.get(position.getbus_name());
holder.bus_area.setText(item.get(position).getbus_area()+“,”
+item.get(position.getbus_city());
holder.bus_point.setText(item.get(position.getcus_bus_point());
返回视图;
}
公共空过滤器(字符串图表文本){
//TODO自动生成的方法存根
charText=charText.toLowerCase(Locale.getDefault());
item.clear();
如果(ChartText.length()==0){
item.addAll(arraylist);
}否则{
for(PointItem it:arraylist){
if(it.getbus_name().toLowerCase(Locale.getDefault())
.contains(图表文本)){
项目。添加(it);
}
}
}
notifyDataSetChanged();
}
}
您需要在适配器中执行过滤并实现可过滤。
接下来,覆盖
@Override
public Filter getFilter() {
if (mFilter == null)
{
mFilter = new ValueFilter();
}
return mFilter;
}
接下来,您需要执行以下操作:
私有类ValueFilter扩展了筛选器{
//Invoked in a worker thread to filter the data according to the constraint.
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results=new FilterResults();
if(constraint!=null && constraint.length()>0){
ArrayList<Vertex> filterList = new ArrayList<Vertex>();
for(int i=0;i<mStringFilterList.size();i++)
{
Vertex v = mStringFilterList.get(i);
if (v != null)
{
if((v.getTitle().toUpperCase())
.contains(constraint.toString().toUpperCase()))
{
Vertex contacts = null;
try {
contacts = new Vertex(v.getJSObject());
contacts.setTitle(v.getTitle());
} catch (JSONException e) {
e.printStackTrace();
}
filterList.add(contacts);
}
}
}
results.count=filterList.size();
results.values=filterList;
}else{
results.count=mStringFilterList.size();
results.values=mStringFilterList;
}
return results;
}
//Invoked in the UI thread to publish the filtering results in the user interface.
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
mData=(ArrayList<Vertex>) results.values;
notifyDataSetChanged();
}
}
//在工作线程中调用,以根据约束筛选数据。
@凌驾
受保护的筛选器结果性能筛选(CharSequence约束){
FilterResults results=新的FilterResults();
if(constraint!=null&&constraint.length()>0){
ArrayList filterList=新建ArrayList();
对于(inti=0;i我的代码中没有使用Holder…只需更改showPointAdapter类代码…使用
final ViewHolder holder;
只需更改适配器类代码:-
public class ShowPointAdapter extends BaseAdapter {
Context mContext;
LayoutInflater mInflater;
private List<PointItem> item = null;
private ArrayList<PointItem> arraylist;
String search;
public ShowPointAdapter(Context context, List<PointItem> item) {
mContext = context;
this.item = item;
mInflater = LayoutInflater.from(mContext);
this.arraylist = new ArrayList<PointItem>();
this.arraylist.addAll(item);
}
public class ViewHolder {
TextView Bus_name;
TextView bus_area;
TextView bus_point;
}
@Override
public int getCount() {
return item.size();
}
@Override
public PointItem getItem(int position) {
return item.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public boolean isEnabled(int position) {
return false;
}
@Override
public View getView(final int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = mInflater.inflate(R.layout.customer_show_point_item, null);
holder.Bus_name = (TextView) view
.findViewById(R.id.item_bname);
holder.bus_area = (TextView) view
.findViewById(R.id.item_barea);
holder.bus_point = (TextView) view
.findViewById(R.id.bus_point);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
// set the result into textviews
holder.Bus_name.setText(item.get(position).getbus_name());
holder.bus_area.setText(item.get(position).getbus_area() + ", "
+ item.get(position).getbus_city());
holder.bus_point.setText(item.get(position).getcus_bus_point());
return view;
}
public void filter(String charText) {
// TODO Auto-generated method stub
charText = charText.toLowerCase(Locale.getDefault());
item.clear();
if (charText.length() == 0) {
item.addAll(arraylist);
} else {
for (PointItem it : arraylist) {
if (it.getbus_name().toLowerCase(Locale.getDefault())
.contains(charText)) {
item.add(it);
}
}
}
notifyDataSetChanged();
}
}
公共类ShowPointAdapter扩展了BaseAdapter{
语境;
拉平机;
私有列表项=null;
私有ArrayList ArrayList;
字符串搜索;
公共ShowPointAdapter(上下文,列表项){
mContext=上下文;
this.item=项目;
mInflater=LayoutInflater.from(mContext);
this.arraylist=新的arraylist();
this.arraylist.addAll(项);
}
公共类视图持有者{
TextView总线名称;
TextView巴士服务区;
TextView巴士站;
}
@凌驾
public int getCount(){
返回item.size();
}
@凌驾
公共点项目getItem(内部位置){
返回项目。获取(位置);
}
@凌驾
公共长getItemId(int位置){
返回位置;
}
公共布尔值isEnabled(整型位置){
返回false;
}
@凌驾
公共视图getView(最终整数位置、视图视图、视图组父视图){
最终持票人;
如果(视图==null){
holder=新的ViewHolder();
视图=最小平坦度。充气(R.layout.customer\u show\u point\u item,空);
holder.Bus_name=(TextView)视图
.findViewById(R.id.项目名称);
holder.bus_区域=(文本视图)视图
.findViewById(R.id.item_barea);
holder.bus_点=(文本视图)视图
.findViewById(R.id.bus_point);
视图.设置标签(支架);
}否则{
holder=(ViewHolder)view.getTag();
}
//将结果设置为文本视图
holder.Bus_name.setText(item.get(position.getbus_name());
holder.bus_area.setText(item.get(position).getbus_area()+“,”
+item.get(position.getbus_city());
holder.bus_point.setText(item.get(position.getcus_bus_point());
返回视图;
}
公共空过滤器(字符串图表文本){
//TODO自动生成的方法存根
charText=charText.toLowerCase(Locale.getDefault());
item.clear();
如果(ChartText.length()==0){
item.addAll(arraylist);
}否则{
for(PointItem it:arraylist){
if(it.getbus_name().toLowerCase(Locale.getDefault())
.contains(图表文本)){
项目。添加(it);
}
}
}
notifyDataSetChanged();
}
}