Android中AutoCompleteTextView自动提示

我们使用控件autocompletetextview 自动提示时，有时需要设置baseadapter，设置baseadapter时，需要实现filterable，手动进行筛选。

常用属性

布局只设置了至少输入一个字符显示提示

<autocompletetextview
    android:id="@+id/at"
    android:completionthreshold="1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

 private list<string> alldata = new arraylist<>();

  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_main);
    alldata.add("aa");
    alldata.add("bb");
    alldata.add("cc");
    alldata.add("dd");
    alldata.add("abc");
    alldata.add("bcd");
    autocompletetextview textview = (autocompletetextview) findviewbyid(r.id.at);
    myadapter adapter = new myadapter();
    textview.setadapter(adapter);
  }

adapter适配器代码

 class myadapter extends baseadapter implements filterable {
    datafilter filter;
    arraylist<string> data;

    @override
    public int getcount() {
      if (data != null && data.size() > 0) {
        return data.size();
      }
      return 0;
    }

    @override
    public object getitem(int i) {
      return null;
    }

    @override
    public long getitemid(int i) {
      return 0;
    }

    @override
    public view getview(int position, view view, viewgroup viewgroup) {
      textview textview = new textview(mainactivity.this);
      textview.settext(data.get(position));
      return textview;
    }

    @override
    public filter getfilter() {
      if (filter == null) {
        filter = new datafilter();
      }
      return filter;
    }

    private class datafilter extends filter {

      @override
      protected filterresults performfiltering(charsequence prefix) {
        //查询结果保存到filterresults对象里
        filterresults results = new filterresults();
        list<string> querydata = new arraylist<>();
        for (int i = 0; i < alldata.size(); i++) {
          if (alldata.get(i).contains(prefix.tostring())) {
            querydata.add(alldata.get(i));
          }
        }
        results.values = querydata;
        results.count = querydata.size();
        return results;
      }

      /**
       * 更新ui
       */
      @override
      protected void publishresults(charsequence constraint, filterresults results) {

        list<string> querydata = (list<string>) results.values;
        if (data == null) {
          data = new arraylist<>();
        }
        if (data.size() > 0) {
          data.clear();
        }

        if (querydata != null && querydata.size() > 0)
          for (string string : querydata) {
            data.add(string);
            notifydatasetchanged();
          }
      }

    }
  }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。