java - 取消选中/取消选择 singleChoice ListView

Question

组合 - 列出并可选择写入未列出的值

<ListView
        android:id="@+id/category_choices"
        android:choiceMode="singleChoice"
        android:layout_width="400dp"
        android:layout_height="wrap_content">
</ListView>

<EditText
        android:id="@+id/other_please_specify"
        android:singleLine="true"    
        android:layout_height="wrap_content" android:layout_width="326dp"/>

数据绑定(bind)工作

ArrayAdapter<String> adapter = new ArrayAdapter<String>(getContext(),
        android.R.layout.simple_list_item_single_choice, categories);
listView.setAdapter(adapter);

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
       public void onItemClick(AdapterView<?> myAdapter, View myView, int myItemInt, long mylng) {
           selectedItem = (String) (listView.getItemAtPosition(myItemInt));
        }
});

在 EditText 中输入任何文本时如何清除单选按钮选择？

我尝试了以下方法，但不起作用

editText.setOnKeyListener(new OnKeyListener() {
    @Override
    public boolean onKey(View view, int i, KeyEvent keyEvent) {
        if (selectedItem != null) {
            int checkedItem = listView.getCheckedItemPosition();
            listView.setItemChecked(checkedItem, false);
            selectedItem = null;
        }
        return false;
    }
});

Answer 1

您必须使用Text Watcher用于编辑文本以监听输入的文本:

editText.addTextChangedListener(new TextWatcher() {
        @Override
        public void onTextChanged(CharSequence s, int start, int before,
                int count) {
                         // do your stuffs here
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {
        }

        @Override
        public void afterTextChanged(Editable s) {
            Log.e("TextWatcherTest", "afterTextChanged:\t" + s.toString());
        }
    });