Android 使用arrayadapter筛选ListView
我正在尝试使用arrayadapter筛选列表视图。arraydapter参数是字符串[]。问题是什么都会发生。我必须覆盖过滤器接口吗？在这种情况下，有人能提供一些提示吗 我要筛选的数组的每个位置都是Android 使用arrayadapter筛选ListView,android,filter,android-arrayadapter,Android,Filter,Android Arrayadapter,我正在尝试使用arrayadapter筛选列表视图。arraydapter参数是字符串[]。问题是什么都会发生。我必须覆盖过滤器接口吗？在这种情况下，有人能提供一些提示吗 我要筛选的数组的每个位置都是 galleryValues[0][0] -> "tiulo" [0][1] -> "desc" [0][2] -> "etc" 我试着过滤它： lstContinente = (ListView)findViewById
galleryValues[0][0] -> "tiulo"
[0][1] -> "desc"
[0][2] -> "etc"
lstContinente = (ListView)findViewById(R.id.list);
lstContinente.setTextFilterEnabled(true);
adapter = new PortaitArrayAdapter(cx,galleryValues);
lstContinente.setAdapter(adapter);
ed_busqueda.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// TODO Auto-generated method stub
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
adapter.getFilter().filter(s.toString());
adapter.notifyDataSetChanged();
}
});
public class PortaitArrayAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[][] values;
private List<Imagen> imagenes = null;
private LayoutInflater mInflater;
public ImageLoader imageLoader;
public PortaitArrayAdapter(Context context, String[][] values) {
super(context, R.layout.gallery_row);
this.context = context;
this.values = values;
mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imagenes = new ArrayList<Imagen>();
for (int i = 0; i < 20; i++) imagenes.add(new Imagen());
Bitmap def = BitmapFactory.decodeResource(this.context.getResources(),R.drawable.ic_launcher);
imageLoader=new ImageLoader(this.context,def, imagenes);
}
@Override
public int getCount (){
return this.values.length;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.gallery_row, parent, false);
holder.txtTitulo = (TextView) convertView.findViewById(R.id.txt_gallery_titulo);
holder.txtDesc = (TextView) convertView.findViewById(R.id.txt_gallery_desc);
holder.txtFecha = (TextView) convertView.findViewById(R.id.txt_gallery_fecha);
holder.txtEst = (TextView) convertView.findViewById(R.id.txt_gallery_est);
holder.imageView = (ImageView)convertView.findViewById(R.id.lst_img_gallery);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
/*LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.gallery_row, parent, false);*/
//ImageView imageView = (ImageView) rowView.findViewById(R.id.icon);
Bitmap bmp;
Log.v("Position --> ",String.valueOf(position));
try {
byte b[] = imagenes.get(position).getImageData();
if (b != null) {
bmp = BitmapFactory.decodeByteArray(b, 0, b.length);
if (bmp != null) holder.imageView.setImageBitmap(bmp);
} else {
String urlBase = galleryValues[position][0].substring(0, galleryValues[position][0].lastIndexOf("/")+1);
String urlToEncode = galleryValues[position][0].substring(galleryValues[position][0].lastIndexOf("/")+1, galleryValues[position][0].length());
urlToEncode = URLEncoder.encode(urlToEncode,"UTF-8");
String url = urlBase.concat(urlToEncode);
url = url.replace("+", "%20");
Log.v("UrlFinal --> ",url);
imageLoader.DisplayImage(String.valueOf(position),url,act,holder.imageView, position,null);
}
} catch (Exception e) {
Log.e(this.getClass().getName(),"Exception en pos = " + position + " error:" + e.getMessage());
e.printStackTrace();
}
holder.txtTitulo.setText(galleryValues[position][1] + ", " + galleryValues[position][2]);
String[] dates = galleryValues[position][4].split("/");
String date = dates [1] + "/" + dates[0] + "/" + dates[2];
Date d1 = new Date(date);
DateFormat df = DateFormat.getDateInstance(DateFormat.LONG);
holder.txtDesc.setText(galleryValues[position][3]);
holder.txtFecha.setText(df.format(d1));
holder.txtEst.setText(getText(R.string.num_fotos_gallery) + galleryValues[position][5] + " - " + getText(R.string.num_videos_gallery) + galleryValues[position][6] + " - " + getText(R.string.num_exp_gallery) + galleryValues[position][7]);
return convertView;
}
}
private static class ViewHolder {
TextView txtTitulo;
TextView txtDesc;
TextView txtFecha;
TextView txtEst;
ImageView imageView;
}
公共类PortatiArrayAdapter扩展了ArrayAdapter{
私人最终语境；
私有最终字符串[][]值；
私有列表imagenes=null；
私人停车场；
公共图像加载器；
公共PortitarArrayAdapter（上下文上下文，字符串[][]值）{
超级（背景，右布局，画廊排）；
this.context=上下文；
这个值=值；
mInflater=（LayoutInflater）上下文
.getSystemService（上下文布局\充气机\服务）；
imagenes=新的ArrayList（）；
对于（inti=0；i<20；i++）imagenes.add（newimagen（））；
位图def=BitmapFactory.decodeResource（this.context.getResources（），R.drawable.ic_启动器）；
imageLoader=新的imageLoader（this.context、def、imagenes）；
}
@凌驾
公共整数getCount（）{
返回此.values.length；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
视窗座；
if（convertView==null）{
holder=新的ViewHolder（）；
convertView=mInflater.充气（R.layout.gallery_行，父级，false）；
holder.txtitulo=（TextView）convertView.findViewById（R.id.txt\u gallery\u titulo）；
holder.txtDesc=（TextView）convertView.findViewById（R.id.txt\u gallery\u desc）；
holder.txtFecha=（TextView）convertView.findViewById（R.id.txt\u gallery\u fecha）；
holder.txtEst=（TextView）convertView.findViewById（R.id.txt\u gallery\u est）；
holder.imageView=（imageView）convertView.findViewById（R.id.lst\u img\u gallery）；
convertView.setTag（支架）；
}否则{
holder=（ViewHolder）convertView.getTag（）；
}
/*LayoutFlater充气器=（LayoutFlater）上下文
.getSystemService（上下文布局\充气机\服务）；
视图行视图=充气机。充气（R.layout.gallery\u行，父级，false）*/
//ImageView ImageView=（ImageView）rowView.findViewById（R.id.icon）；
位图bmp；
Log.v（“位置-->”，String.valueOf（位置））；
试一试{
字节b[]=imagenes.get（位置）.getImageData（）；
如果（b！=null）{
bmp=BitmapFactory.decodeByteArray（b，0，b.length）；
如果（bmp！=null）holder.imageView.setImageBitmap（bmp）；
}否则{
字符串urlBase=galleryValues[position][0]。子字符串（0，galleryValues[position][0]。lastIndexOf（“/”+1）；
字符串urlToEncode=galleryValues[position][0]。子字符串（galleryValues[position][0]。lastIndexOf（“/”）+1，galleryValues[position][0]。长度（）；
urlToEncode=urlcoder.encode（urlToEncode，“UTF-8”）；
字符串url=urlBase.concat（urlToEncode）；
url=url.replace（“+”，“%20”）；
Log.v（“UrlFinal-->”，url）；
imageLoader.DisplayImage（String.valueOf（position）、url、act、holder.imageView、position、null）；
}
}捕获（例外e）{
Log.e（this.getClass（）.getName（），“Exception en pos=“+position+”错误：“+e.getMessage（））；
e、 printStackTrace（）；
}
holder.txtitulo.setText（galleryValues[position][1]+“，“+galleryValues[position][2]）；
字符串[]日期=galleryValues[位置][4]。拆分（“/”；
字符串日期=日期[1]+“/”+日期[0]+“/”+日期[2]；
日期d1=新日期（日期）；
DateFormat df=DateFormat.getDateInstance（DateFormat.LONG）；
holder.txtDesc.setText（galleryValues[position][3]）；
holder.txtFecha.setText（df.format（d1））；
holder.txtEst.setText（getText（R.string.num_fotos_gallery）+galleryValues[position][5]+“-”+getText（R.string.num_videos_gallery）+galleryValues[position][6]+“-”+getText（R.string.num exp_gallery）+galleryValues[position][7]）；
返回视图；
}
}
私有静态类视图持有者{
TextView-txtitulo；
TextView-txtDesc；
TextView-txtFecha；
TextView-txtEst；
图像视图图像视图；
}
数组列表适配器字符串[]一起更改适配器类实现Filterable
，并覆盖getFilter（）
检查筛选自定义适配器的完整示例
public class ListFilterActivity extends ListActivity {
private List<String> list = new ArrayList<String>();
List<String> mOriginalValues;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final MyAdapter adapter = new MyAdapter(this, getModel());
setListAdapter(adapter);
EditText filterEditText = (EditText) findViewById(R.id.filterText);
// Add Text Change Listener to EditText
filterEditText.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// Call back the Adapter with current character to Filter
adapter.getFilter().filter(s.toString());
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
}
private List<String> getModel() {
list.add("Linux");
list.add("Windows7");
list.add("Suse");
list.add("Eclipse");
list.add("Ubuntu");
list.add("Solaris");
list.add("Android");
list.add("iPhone");
list.add("Windows XP");
return list;
}
}
// Adapter Class
public class MyAdapter extends BaseAdapter implements Filterable {
List<String> arrayList;
List<String> mOriginalValues; // Original Values
LayoutInflater inflater;
public MyAdapter(Context context, List<String> arrayList) {
this.arrayList = arrayList;
inflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
private class ViewHolder {
TextView textView;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
holder = new ViewHolder();
convertView = inflater.inflate(R.layout.row, null);
holder.textView = (TextView) convertView
.findViewById(R.id.textview);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.textView.setText(arrayList.get(position));
return convertView;
}
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,FilterResults results) {
arrayList = (List<String>) results.values; // has the filtered values
notifyDataSetChanged(); // notifies the data with new filtered values
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults(); // Holds the results of a filtering operation in values
List<String> FilteredArrList = new ArrayList<String>();
if (mOriginalValues == null) {
mOriginalValues = new ArrayList<String>(arrayList); // saves the original data in mOriginalValues
}
/********
*
* If constraint(CharSequence that is received) is null returns the mOriginalValues(Original) values
* else does the Filtering and returns FilteredArrList(Filtered)
*
********/
if (constraint == null || constraint.length() == 0) {
// set the Original result to return
results.count = mOriginalValues.size();
results.values = mOriginalValues;
} else {
constraint = constraint.toString().toLowerCase();
for (int i = 0; i < mOriginalValues.size(); i++) {
String data = mOriginalValues.get(i);
if (data.toLowerCase().startsWith(constraint.toString())) {
FilteredArrList.add(data);
}
}
// set the Filtered result to return
results.count = FilteredArrList.size();
results.values = FilteredArrList;
}
return results;
}
};
return filter;
}
}
公共类ListFilterActivity扩展ListActivity{
私有列表=新的ArrayList（）；
列出mOriginalValues；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.main）；
final MyAdapter=newmyadapter（这个，getModel（））；
setListAdapter（适配器）；
EditText filterEditText=（EditText）findViewById（R.id.filterText）；
//将文本更改侦听器添加到EditText
filterEditText.addTextChangedListener（新的TextWatcher（）{
@凌驾
public void onTextChanged（字符序列、int start、int before、int count）{
//使用当前字符回调适配器以进行筛选
adapter.getFilter（）.filter（s.toString（））；
}
@凌驾
更改前文本之前的公共void（字符序列s、int start、int count、int after）{
}
@凌驾
公共无效后文本已更改（可编辑）{
}
});
}
私有列表getModel（）{
添加（“Linux”）；
列表。添加（“Windows7”）；
列表。添加（“Suse”）；
列表
public class ListViewAdapter extends BaseAdapter {
// Declare Variables
Context mContext;
LayoutInflater inflater;
public List<AllFoodItem> allFoodItemlist;
public ArrayList<AllFoodItem> arraylist;
public ListViewAdapter(Context context, List<AllFoodItem> allFoodItemlist) {
mContext = context;
this.allFoodItemlist = allFoodItemlist;
inflater = LayoutInflater.from(mContext);
this.arraylist = new ArrayList<AllFoodItem>();
this.arraylist.addAll(allFoodItemlist);
}
@Override
public int getCount() {
return allFoodItemlist.size();
}
@Override
public AllFoodItem getItem(int position) {
return allFoodItemlist.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public class Holder {
TextView foodname, quantity, calorie;
}
public View getView(final int position, View view, ViewGroup parent) {
Holder holder = new Holder();
view = inflater.inflate(R.layout.program_list, null);
// Locate the TextViews in listview_item.xml
holder.foodname = (TextView) view.findViewById(R.id.textView1);
// Set the results into TextViews holder.foodname.setText(allFoodItemlist.get(position).getName().toString());
return view;
}
// Filter Class
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
allFoodItemlist.clear();
if (charText.length() == 0) {
allFoodItemlist.addAll(arraylist);
} else {
for (AllFoodItem wp : arraylist) {
if (wp.getName().toLowerCase(Locale.getDefault()).contains(charText)) {
allFoodItemlist.add(wp);
}
}
}
notifyDataSetChanged();
}
}
inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
foodname = (inputSearch.getText().toString()).trim();
// filter the data of edit Text using filter method in ListViewAdapter
String text = inputSearch.getText().toString().toLowerCase(Locale.getDefault());
adapter.filter(text);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable arg0) {
userGet();
// TODO Auto-generated method stub
}
});