Android自定义输入框提示功能

时间:2020-09-29 起名想半天，费事人气:0

本文着重为大家仔细讲解了Android自定义输入框提示功能，文中代码实例讲解的非常细致，希望能够帮助到您，欢迎大家阅读和收藏

这是系统提供的一个控件：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="请输入姓名"/>

但是我们想在item的布局中加入其他东西怎么办？这样我们只能自己定义适配器，首先先看看AutoCompleteTextView需要的适配器的类型

查看AutoCompleteTextView的setAdapter（）方法的源码如下：

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);
}

自定义适配器核心代码：

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 start, int before, int count) {
    if(nameEdit.getText().toString().length()>1){
     //根据实际操作请求数据

    }
   }

   @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;
 }

}

效果图

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