Android中扩展ArrayAdapter中的搜索项
我正在使用Android中扩展ArrayAdapter中的搜索项,android,listview,search,android-arrayadapter,Android,Listview,Search,Android Arrayadapter,我正在使用ArrayAdapter在ListView中显示列表项,一切正常,但我想从该列表中搜索项目。实际上,这些是包含姓名和电话的联系人列表。我只想按名字搜索 我为搜索编写了一些代码,其中没有错误,也没有任何运行时错误,但搜索功能不起作用 main活动 EditText contactSearch = (EditText) findViewById(R.id.contactSearch); contactSearch.addTextChangedListener
ArrayAdapter
在ListView
中显示列表项,一切正常,但我想从该列表中搜索项目。实际上,这些是包含姓名和电话的联系人列表。我只想按名字搜索
我为搜索编写了一些代码,其中没有错误,也没有任何运行时错误,但搜索功能不起作用
main活动
EditText contactSearch = (EditText) findViewById(R.id.contactSearch);
contactSearch.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
contentAdapter.getFilter().filter(s);
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
ContentAdapter
public class ContentAdapter extends ArrayAdapter<String> {
private Context context;
private String[] names;
private String[] phones;
public static Dialog dialog;
/*ContentAdapter(Context ctx, List<String> rows){
super(ctx, R.layout.contact_row,R.id.txtName, rows);
context = ctx;
dialog = new Dialog(context);
}*/
ContentAdapter(Context ctx, String[] name, String[] phone){
super(ctx, R.layout.contact_row,R.id.txtName,name);
context = ctx;
names = name;
phones = phone;
dialog = new Dialog(context);
}
private class ViewHolder{
TextView name, phone;
ViewHolder(View view){
name = (TextView) view.findViewById(R.id.txtName);
phone = (TextView) view.findViewById(R.id.txtPhoneNumber);
view.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
Toast.makeText(context, "Item click", Toast.LENGTH_SHORT).show();
String phoneNumber = phone.getText().toString();
String userName = name.getText().toString();
//final Dialog dialog = new Dialog(context);
dialog.setContentView(R.layout.custom_dialog);
dialog.setTitle(userName);
EditText etxtContactNumber = (EditText) dialog.findViewById(R.id.etxtContactNumber);
etxtContactNumber.setText(phoneNumber);
dialog.show();
}
});
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ViewHolder viewHolder = null;
if(row == null) {
LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = layoutInflater.inflate(R.layout.contact_row, parent, false);
viewHolder = new ViewHolder(row);
row.setTag(viewHolder);
}else{
viewHolder = (ViewHolder) row.getTag();
}
viewHolder.name.setText(names[position]);
viewHolder.phone.setText(phones[position]);
return row;
}
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
Filter.FilterResults filterResults = new FilterResults();
ArrayList<String> values = new ArrayList<>();
for (int i=0; i < getCount(); i++) {
if (names[i].contains(constraint)) {
values.add(names[i]);
}
filterResults.values = values;
filterResults.count = values.size();
}
return filterResults;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence contraint, FilterResults results) {
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
};
}
}
公共类ContentAdapter扩展了ArrayAdapter{
私人语境;
私有字符串[]名称;
私人电话;
公共静态对话框;
/*ContentAdapter(上下文ctx,列表行){
超级(ctx,R.layout.contact_row,R.id.txtName,rows);
上下文=ctx;
对话框=新对话框(上下文);
}*/
ContentAdapter(上下文ctx,字符串[]名称,字符串[]电话){
超级(ctx,右布局。联系人,右id.txtName,姓名);
上下文=ctx;
名称=名称;
电话=电话;
dialog=新建对话框(上下文);
}
私有类视窗持有者{
文本视图名称、电话;
视图保持器(视图){
name=(TextView)view.findViewById(R.id.txtName);
phone=(TextView)view.findViewById(R.id.txtPhoneNumber);
view.setOnClickListener(新的view.OnClickListener(){
@凌驾
公共void onClick(视图v){
Toast.makeText(上下文,“项目单击”,Toast.LENGTH_SHORT).show();
字符串phoneNumber=phone.getText().toString();
字符串userName=name.getText().toString();
//最终对话框=新对话框(上下文);
setContentView(R.layout.custom_对话框);
对话框.setTitle(用户名);
EditText etxtContactNumber=(EditText)dialog.findViewById(R.id.etxtContactNumber);
etxtContactNumber.setText(电话号码);
dialog.show();
}
});
}
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
视图行=转换视图;
ViewHolder ViewHolder=null;
if(行==null){
LayoutInflater LayoutInflater=(LayoutInflater)context.getSystemService(context.LAYOUT\u INFLATER\u SERVICE);
行=布局更平坦。充气(R.layout.contact_行,父项,false);
viewHolder=新的viewHolder(行);
row.setTag(viewHolder);
}否则{
viewHolder=(viewHolder)row.getTag();
}
viewHolder.name.setText(名称[位置]);
viewHolder.phone.setText(phones[position]);
返回行;
}
公共过滤器getFilter(){
返回新筛选器(){
@凌驾
受保护的筛选器结果性能筛选(CharSequence约束){
Filter.FilterResults FilterResults=新的FilterResults();
ArrayList值=新的ArrayList();
对于(int i=0;i0){
notifyDataSetChanged();
}否则{
notifyDataSetionValidated();
}
}
};
}
}
在代码的末尾,您可以看到我用来搜索的搜索函数。我是android新手,我不知道我在那里错过了什么
EditText contactSearch = (EditText) findViewById(R.id.contactSearch);
contactSearch.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
contentAdapter.getFilter().filter(s);
}
@Override
public void afterTextChanged(Editable s) {
}
});
当我在使用ArrayAdapter时,请尝试像使用BaseAdapter一样使用。我认为您需要将字符串数组合并到一个ArrayList中。我在ListView上有一个带有ArrayList过滤器示例的博客:希望对您有所帮助!可能重复的,您想试试吗?