Question

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);

这不起作用....我的意思是它只是像EditTextView一样工作。我哪里错了？

完整代码：

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

    }
}

Answer 1

在看到这个问题之前，我刚刚看到了你的另一个问题。我在自动完成方面苦苦挣扎了一段时间，我几乎恢复了下载所有关键字的新实现，直到我终于开始工作。我做的是;

//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获取建议

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

在AsyncTask的onPostExecute中，我然后更新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();

有关详细信息，请参阅setNotifyOnChange和notifyDataSetChanged

Answer 2

这是我项目的片段。我想在你从服务获得数据后，你所要做的就是：

清除以前的数据。
清除以前的适配器值。
然后使用add（）或addAll（）方法将值添加到数据列表中。

通过在适配器上调用notifyDataSetChanged（）来通知更改的数据。

@Override
public void onGetPatient(List<PatientSearchModel> patientSearchModelList) {

//here we got the raw data traverse it to get the filtered names data for the suggestions

stringArrayListPatients.clear();
stringArrayAdapterPatient.clear();
for (PatientSearchModel patientSearchModel:patientSearchModelList){

    if (patientSearchModel.getFullName()!=null){

        stringArrayListPatients.add(patientSearchModel.getFullName());

    }

}

//update the array adapter for patient search
stringArrayAdapterPatient.addAll(stringArrayListPatients);
stringArrayAdapterPatient.notifyDataSetChanged();

}

但在此之前请确保您已将适配器附加到自动完成文本视图，如果不按如下方式执行：

ArrayAdapter<String> stringArrayAdapterPatient= new ArrayAdapter<String>(getActivity(),android.support.v7.appcompat.R.layout.select_dialog_item_material,stringArrayListPatients);

completeTextViewPatient.setAdapter(stringArrayAdapterPatient);

Answer 3

    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);

它的工作只是评论et.addtext line ...

Answer 4

更新适配器并立即通知更改dropDown后，唯一可行的解决方案是再次重置AutoCompleteTextView文本，Kotlin示例：

 with(autoCompleteTextView) {
       text = text
  // Place cursor to end   
}

Java之类的东西：

autoCompleteTextView.setText(autoCompleteTextView.getText());
// Place cursor to end

Answer 5

AutoCompleteTextView.Invalidate（）会做到的。

Answer 6

使用 adapter.notifyDataSetChanged() 方法通知列表中的更改，如果这不起作用，那么您可以像 autoCompleteTextView.showDropDown() 一样手动显示 DropDown

AutoCompleteTextView不显示任何下拉项

6 个答案: