Question

如果要键入AutoCompleteAdapter列表的完整建议字，我希望我的片段听。

例如，我的列表包含以下元素：

{"Alireza Noorali", "Armin Yaghini", "Hassan Mirfendereski"}

用户在AutoCompleteTextView中键入Alireza Nooral，我想dismissDropDown()并在用户键入建议的最后一个字符i为Alireza Noorali时执行其他操作。

我实现了一个自定义适配器，并在其getFilter方法中放置了一个侦听器：

@NonNull
@Override
public Filter getFilter() {
    return nameFilter;
}

/*
 * Custom Filter implementation for custom suggestions we provide.
 */
private Filter nameFilter = new Filter() {
    @Override
    protected FilterResults performFiltering(CharSequence inputChars) {

        if (inputChars != null) {

            try {
                suggestions.clear();
            } catch (Exception e) {
                e.printStackTrace();
            }

            for (String acTvItem : tempItems) {
                if (acTvItem.toLowerCase().contains(inputChars.toString().toLowerCase())) {
                    suggestions.add(acTvItem);
                }

                if (listener != null && acTvItem.equalsIgnoreCase(inputChars.toString()) && results.count == 1) {
                    listener.onCompleteInputListener(key);
                }
            }

            FilterResults filterResults = new FilterResults();
            filterResults.values = suggestions;
            filterResults.count = suggestions.size();
            return filterResults;
        } else {
            return new FilterResults();
        }
    }

    @Override
    protected void publishResults(CharSequence constraint, FilterResults results) {
        List<String> filterList = (ArrayList<String>) results.values;
        if (results.count > 0) {
            clear();
            if (filterList != null && !filterList.isEmpty()) {
                for (String acTvItem : filterList) {
                    add(acTvItem);
                    notifyDataSetChanged();
                }
            }
        }
    }
};


/*  ---------- Interface ----------  */

public interface CompleteInputListener {
    void onCompleteInputListener(String key);
}

在我的片段中，我实现了侦听器方法：

private AcTvAdapter.CompleteInputListener completeInputListener() {
    return new AcTvAdapter.CompleteInputListener() {
        @Override
        public void onCompleteInputListener(String key) {

            // hideSoftKeyboard & dismissDropDown & something else
        }
    };
}

但是当我执行最初所说的情况时，会收到以下警告：

W/Filter: An exception occured during performFiltering()!
android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
    at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:7809)
    at android.view.ViewRootImpl.invalidateChildInParent(ViewRootImpl.java:1338)
    at android.view.ViewGroup.invalidateChild(ViewGroup.java:5446)
    at android.view.View.invalidateInternal(View.java:14749)
    at android.view.View.invalidate(View.java:14713)
    at android.view.View.setFlags(View.java:12542)
    at android.view.View.setVisibility(View.java:8611)
    at ir.noorali.myapp.MyFrag.getCountry(MyFrag.java:662)
    at ir.noorali.myapp.MyFrag$12.onCompleteInputListener(MyFrag.java:995)
    at ir.noorali.myapp.adapters.AcTvAdapter$1.performFiltering(AcTvAdapter.java:120)
    at android.widget.Filter$RequestHandler.handleMessage(Filter.java:234)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:154)
    at android.os.HandlerThread.run(HandlerThread.java:61)

我知道原因是ActionListener的声明：

Java ActionListener是一个不可见的 GUI对象，当用户执行特定操作时，该对象将调用其方法。常见的操作包括按下按钮，切换切换按钮，选中复选框，在组合框中选择一个项目等等。

但是我不知道如何实现自己的目标。有其他解决方案吗？

Answer 1

正如@pskink在评论中所说，我在if let nvc = self.storyboard?.instantiateViewController(withIdentifier: "EditTaskNavController") as? UINavigationController, let top = nvc.topViewController as? TaskEditViewController { top.someProperty = /* some value */ self.present(nvc, animated: true) { /* some code */ } }上致电onCompleteInputListener，问题得以解决。这是我的新代码：

publishResults

现在它可以正常工作了！

如果输入了AutoCompleteTextView完整建议单词，如何收听

1 个答案: