Question

我正在开展一个项目，我必须从SQLite3数据库访问数据，并在输入时向用户显示建议。我已经尝试使用AutoCompleteTextView，但它无法正常工作。我正在研究这段代码：

ArrayList<String> sugestion = new ArrayList<String>();


public ViewGroup onCreateView (LayoutInflater inflater , ViewGroup container , Bundle savedInstanceState )
{
myAutoComplete = (AutoCompleteTextView) group.findViewById(R.id.searchit);

searchDB = new searchAdapter(getActivity());

searchDB.getWritableDatabase();

myAutoComplete.addTextChangedListener(new TextWatcher(){
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            suggestion = searchDB.getSuggestion(s.toString());

            Collections.sort(suggestion);

            String[] item = new String[suggestion.size()];

            item = suggestion.toArray(item);

            for(String word : item)
                System.out.println(word);

        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {                

        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    });

searchAdapter = new ArrayAdapter<String>(getActivity() , android.R.layout.simple_dropdown_item_1line, item);

        myAutoComplete.setAdapter(searchAdapter);

...
}

我已经通过打印检查了ArrayList（来自数据库）和String[]数组，它们已经排列了字符串。

我的xml布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id = "@+id/group"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  >


<AutoCompleteTextView
        android:id="@+id/searchit"
         android:layout_marginTop="15dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:hint="Choose The Country" >

        <requestFocus />
    </AutoCompleteTextView>

.....
</RelativeLayout>

键入时不显示字符串建议的下拉列表。我也使用textview而不是android.R.layout.simple_dropdown_item_1line尝试了我自己的布局。我在这里失踪了什么？任何帮助将不胜感激

Answer 1

试试这个

myAutoComplete.showDropDown()

Answer 2

试试这个......

您仅在onCreate()中设置了适配器。但是，您仅在item中的onTextChanged内填充了TextWatcher数组的值。所以，尝试设置填充adapter数组的item afetr。

            myAutoComplete.addTextChangedListener(new TextWatcher(){
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            suggestion = searchDB.getSuggestion(s.toString());

            Collections.sort(suggestion);

            String[] item = new String[suggestion.size()];

            item = suggestion.toArray(item);

            for(String word : item)
                System.out.println(word);

        searchAdapter = new ArrayAdapter<String>(getActivity() , android.R.layout.simple_list_item_1, item);

        myAutoComplete.setAdapter(searchAdapter);
        myAutoComplete.setThreshold(1);

        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {                

        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    });

下拉列表不会出现在AutoCompleteTextView中

2 个答案: