Android 操作栏 SearchView 作为自动完成？

Question

我在操作栏中使用 SearchView。我想在搜索 View 上使用自动完成功能从数据库中获取结果。

这可能吗？还是我需要使用自定义文本框，然后为其添加自动完成功能？

Answer 1

所以我只需要为 v7 版本执行此操作，并且沮丧地发现我不能简单地使用 ArrayAdapter 设置适配器。

我不想使用普通的 AutoCompleteTextView(就像这里的顶级评论者那样)，因为那样你就会错过 SearchView 的许多时髦功能，比如小搜索图标和 x 按钮。

所以我扩展了 SearchView 并得到了这个:

public class ArrayAdapterSearchView extends SearchView {

private SearchView.SearchAutoComplete mSearchAutoComplete;

public ArrayAdapterSearchView(Context context) {
    super(context);
    initialize();
}

public ArrayAdapterSearchView(Context context, AttributeSet attrs) {
    super(context, attrs);
    initialize();
}

public void initialize() {
    mSearchAutoComplete = (SearchAutoComplete) findViewById(android.support.v7.appcompat.R.id.search_src_text);
    this.setAdapter(null);
    this.setOnItemClickListener(null);
}

@Override
public void setSuggestionsAdapter(CursorAdapter adapter) {
    // don't let anyone touch this
}

public void setOnItemClickListener(OnItemClickListener listener) {
    mSearchAutoComplete.setOnItemClickListener(listener);
}

public void setAdapter(ArrayAdapter<?> adapter) {
    mSearchAutoComplete.setAdapter(adapter);
}

public void setText(String text) {
    mSearchAutoComplete.setText(text);
}

}

您可以在 ActionBar 的菜单 xml 中使用它，如下所示:

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto" >

<item
    android:id="@+id/action_search"
    android:icon="@android:drawable/ic_menu_add"
    android:title="TITLE"
    app:actionViewClass="com.yourpackage.ArrayAdapterSearchView"
    app:showAsAction="ifRoom|collapseActionView"/>

</menu>

您可能还想将点击功能添加到自动完成列表(例如，将文本设置为 EditText):

MenuItem searchItem = menu.findItem(R.id.action_search);
final ArrayAdapterSearchView searchView = (ArrayAdapterSearchView)searchItem.getActionView();
searchView.setOnItemClickListener(new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

        searchView.setText(adapter.getItem(position).toString());

    }
});

这里有一个与普通旧 android.widget.SearchView 类似的版本:

public class ArrayAdapterSearchView extends SearchView {

private AutoCompleteTextView mSearchAutoComplete;

public ArrayAdapterSearchView(Context context) {
    super(context);
    initialize();
}

public ArrayAdapterSearchView(Context context, AttributeSet attrs) {
    super(context, attrs);
    initialize();
}

public void initialize() {
    mSearchAutoComplete = (AutoCompleteTextView) findViewById(getResources().getIdentifier("android:id/search_src_text", null, null));
    setAutoCompleSuggestionsAdapter(null);
    setOnItemClickListener(null);
}

@Override
public void setSuggestionsAdapter(CursorAdapter adapter) {
    throw new UnsupportedOperationException("Please use setAutoCompleSuggestionsAdapter(ArrayAdapter<?> adapter) instead");
}

public void setOnItemClickListener(AdapterView.OnItemClickListener listener) {
    mSearchAutoComplete.setOnItemClickListener(listener);
}

public void setAutoCompleSuggestionsAdapter(ArrayAdapter<?> adapter) {
    mSearchAutoComplete.setAdapter(adapter);
}

public void setText(String text) {
    mSearchAutoComplete.setText(text);
}

}