android-AutoCompleteTextView不显示任何下拉项目

我的XML：

<AutoCompleteTextView
        android:id="@+id/searchAutoCompleteTextView_Feed"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:completionThreshold="2"
        android:hint="@string/search" />

我的Java代码：

AutoCompleteTextView eT = (AutoCompleteTextView)findViewById(R.id.searchAutoCompleteTextView_Feed);
eT.addTextChangedListener(this);
String[] sa = new String[]{"apple", "mango", "banana", "apple mango", "mango banana"};
ArrayAdapter<String> aAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_dropdown_item_1line, sa);
eT.setAdapter(aAdapter);

这根本没有用….我的意思是它只是像EditTextView一样工作.我在哪里错了？

完整的代码：

public class FeedListViewActivity extends ListActivity implements TextWatcher{


    private AutoCompleteTextView eT;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.Feed);

        eT = (AutoCompleteTextView) findViewById(R.id.searchAutoCompleteTextView_Feed);
        eT.addTextChangedListener(this);

                    Thread thread = new Thread(null, loadMoreListItems);
                    thread.start();
    }

    private Runnable returnRes = new Runnable() {
        public void run() {

            //code for other purposes
        }
    };

    private Runnable loadMoreListItems = new Runnable() {
        public void run() {
            getProductNames();

            // Done! Now continue on the UI thread
            runOnUiThread(returnRes);
        }
    };

    protected void getProductNames() {

            String[] sa = new String[]{"apple", "mango", "banana", "apple mango", "mango banana"};

            ArrayAdapter<String> aAdapter = new ArrayAdapter<String>(getApplicationContext(),
                    android.R.layout.simple_dropdown_item_1line, sa);
            eT.setAdapter(aAdapter);

    }

    public void afterTextChanged(Editable s) {
        // Todo Auto-generated method stub

    }

    public void beforeTextChanged(CharSequence s, int start, int count,
            int after) {
        // Todo Auto-generated method stub

    }

    public void onTextChanged(CharSequence s, int start, int before, int count) {
        // Todo Auto-generated method stub

    }
}

解决方法:

在看到这个问题之前,我刚刚看到了您的另一个问题.我在一段时间内一直在努力完成自动填充功能,几乎恢复了您下载所有关键字的新实现,直到最终使它生效.我所做的是

//In the onCreate
//The suggestArray is just a static array with a few keywords
this.suggestAdapter = new ArrayAdapter<String>(this, this.suggestionsView, suggestArray);
//The setNotifyOnChange informs all views attached to the adapter to update themselves 
//if the adapter is changed
this.suggestAdapter.setNotifyOnChange(true);

在我的textwatcher的onTextChanged方法中,我使用asynctask获得了建议

//suggestsThread is an AsyncTask object
suggestsThread.cancel(true);
suggestsThread = new WertAgentThread();
suggestsThread.execute(s.toString());

然后在AsyncTask的onPostExecute中,更新autocompletetextview

//suggestions is the result of the http request with the suggestions
this.suggestAdapter = new ArrayAdapter<String>(this, R.layout.suggestions, suggestions);
this.suggestions.setAdapter(this.suggestAdapter);
//notifydatasetchanged forces the dropdown to be shown.
this.suggestAdapter.notifyDataSetChanged();

有关更多信息,请参见setNotifyOnChange和notifyDataSetChanged