Android AutoCompleteTextView onItemSelectedListener未使用蓝牙键盘触发

Question

我有一个简单的应用程序,只包含一个AutoCompleteTextView(下面的代码).我有OnItemClickListener和OnItemSelectedListener定义.单击下拉建议中的各个项目会触发该onItemClick事件.但是,使用蓝牙键盘时,使用箭头键导航到给定项目似乎不会触发onItemSelected事件(此事件不会显示日志).

什么触发了这个onItemSelected事件？我的印象是highlight,其中一个下拉项目就是这样,但情况似乎并非如此.

如果OnItemSelectedListener不是突出显示项目的正确事件侦听器,是否满足此要求？

activity_main.xml中

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

    <AutoCompleteTextView
        android:id="@+id/autoCompleteTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</RelativeLayout>

MainActivity.java

public class MainActivity extends Activity {

    String[] options = {"a1", "a2", "a3", "b1", "b2", "b3", "b4", "b5"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // An adapter object
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.select_dialog_item, options);

        AutoCompleteTextView autoCompleteTextView = (AutoCompleteTextView)findViewById(R.id.autoCompleteTextView);
        autoCompleteTextView.setAdapter(adapter);
        autoCompleteTextView.setThreshold(1);

        // Set the listeners
        autoCompleteTextView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Log.d("OnItemClick", "[AutoCompleteTextView] Item clicked");
            }
        });
        autoCompleteTextView.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                Log.d("onItemSelected", "[AutoCompleteTextView] Item selected");
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
                Log.d("onNothingSelected", "[AutoCompleteTextView] Nothing here");
            }
        });

    }
}

Answer 1

为此，您应该使用onFocusChangeListener 。onItemSelectedListener 用于可选择视图（如列表视图中的视图）。