Android自定義輸入框提示功能

阿新 • • 發佈：2020-09-30

本文例項為大家分享了Android自定義輸入框提示的具體程式碼，供大家參考，具體內容如下

這是系統提供的一個控制元件：AutoCompleteTextView

<AutoCompleteTextView
    android:layout_marginLeft="20dp"
    android:id="@+id/name_edit"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_weight="6"
    android:completionThreshold="1"
    android:textSize="15sp"
    android:maxLength="10"
    android:singleLine="true"
    android:paddingBottom="4dp"
    android:background="@null"
    android:hint="請輸入姓名"/>

但是我們想在item的佈局中加入其他東西怎麼辦？這樣我們只能自己定義介面卡，首先先看看AutoCompleteTextView需要的介面卡的型別

檢視AutoCompleteTextView的setAdapter（）方法的原始碼如下：

public <T extends ListAdapter & Filterable> void setAdapter(T adapter) {
 if (mObserver == null) {
  mObserver = new PopupDataSetObserver(this);
 } else if (mAdapter != null) {
  mAdapter.unregisterDataSetObserver(mObserver);
 }
 mAdapter = adapter;
 if (mAdapter != null) {
  //noinspection unchecked
  mFilter = ((Filterable) mAdapter).getFilter();
  adapter.registerDataSetObserver(mObserver);
 } else {
  mFilter = null;
 }

 mPopup.setAdapter(mAdapter);
}

自定義介面卡核心程式碼：

private PoiKeyTipListAdapter poiKeyTipListAdapter;

poiKeyTipListAdapter = new PoiKeyTipListAdapter(this);
  nameEdit.setAdapter(poiKeyTipListAdapter);
  nameEdit.addTextChangedListener(new TextWatcher() {
   @Override
   public void beforeTextChanged(CharSequence s,int start,int count,int after) {

   }

   @Override
   public void onTextChanged(CharSequence s,int before,int count) {
    if(nameEdit.getText().toString().length()>1){
     //根據實際操作請求資料

    }
   }

   @Override
   public void afterTextChanged(Editable s) {

   }
  });

public class PoiKeyTipListAdapter extends BaseAdapter implements Filterable {
 private List<SendNameBean.DataBean> stringArrayList ;
 private Context context;
 private OnDataChangedListener changedListener;
 public PoiKeyTipListAdapter(Context context) {

  this.context = context;
 }
 public void setData(List<SendNameBean.DataBean> stringArrayList){
  this.stringArrayList = stringArrayList;
  notifyDataSetChanged();
 }
 @Override
 public int getCount() {
  return stringArrayList == null ? 0 : stringArrayList.size();
 }
 @Override
 public Object getItem(int position) {
  return stringArrayList == null ? null : stringArrayList.get(position);
 }
 @Override
 public long getItemId(int position) {
  return position;
 }
 @Override
 public View getView(final int position,View convertView,ViewGroup parent) {
  ViewHolder viewHolder;
  if (convertView == null){
   convertView = LayoutInflater.from(context).inflate(R.layout.item_input_tip_layout,parent,false);
   viewHolder = new ViewHolder();
   viewHolder.item_txt_tip = (TextView) convertView.findViewById(R.id.item_txt_tip);
   viewHolder.name = (TextView) convertView.findViewById(R.id.name);
   viewHolder.phone = (TextView) convertView.findViewById(R.id.phone);
   convertView.setTag(viewHolder);
  }else {
   viewHolder = (ViewHolder) convertView.getTag();
  }
  viewHolder.item_txt_tip.setText(stringArrayList.get(position).getProvinceName()+stringArrayList.get(position).getCityName()+stringArrayList.get(position).getCountyName()+stringArrayList.get(position).getTownName()+stringArrayList.get(position).getAddress());
  viewHolder.name.setText(stringArrayList.get(position).getName());
  viewHolder.phone.setText(stringArrayList.get(position).getPhone());


  convertView.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    if (changedListener != null) {
     changedListener.dataChangedListener(stringArrayList.get(position));
    }
   }
  });

  return convertView;
 }


 static class ViewHolder{
  private TextView item_txt_tip ;
  private TextView name ;
  private TextView phone ;
 }


 @Override
 public Filter getFilter() {
  Filter filter=new Filter() {
   @Override
   protected FilterResults performFiltering(CharSequence constraint) {
    FilterResults results = new FilterResults();
    ArrayList<SendNameBean.DataBean> newData = new ArrayList<>();
    if(stringArrayList!=null && stringArrayList.size()!=0){
     newData.addAll(stringArrayList);
    }
    results.values = newData;
    results.count = newData.size();
    return results;
   }

   @Override
   protected void publishResults(CharSequence constraint,FilterResults results) {
    stringArrayList = (ArrayList)results.values;
    notifyDataSetChanged();
   }
  };
  return filter;
 }


 public interface OnDataChangedListener{
  void dataChangedListener(SendNameBean.DataBean dataBean);
 }


 public void setOnDataChangedListener(OnDataChangedListener changedListener){
  this.changedListener = changedListener;
 }

}

效果圖

Android自定義輸入框提示功能