动态更新的AutoCompleteTextView适配器 [英] Dynamically updating an AutoCompleteTextView adapter

问题描述

我要定期更改通过从RESTful Web服务添加到列表由AutoCompleteTextview给出的建议，并不能得到它的工作顺利进行。我设置了一个硬codeD的建议列表，以确保它的工作：

I want to periodically change the suggestions given by an AutoCompleteTextview by getting the list from a RESTful web service, and can't get it working smoothly. I set up a hard-coded list of suggestions to make sure it's working:

ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.list_item, new String[] {"Hi", "Ho"});
speciesName.setAdapter(adapter);//my autocomplete tv

我已经上了一个TextView的和TextWatcher当启动一个非阻塞调用文本更改为获取建议一个新的列表 - 这其中一部分得到一个新的列表工作正常。然后我想重置​​适配器，像这样：

I have got a TextWatcher on the textview and when the text changes that launches a non-blocking call to get a new list of suggestions -- this part which gets a new list is working fine. Then I want to reset the adapter, like so:

public void setOptionsAndUpdate(String[] options) {
    Log.d(TAG, "setting options");
    //speciesName.setAdapter((ArrayAdapter<String>)null);
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.list_item, options);
    speciesName.setAdapter(adapter);
}

此方法被调用，但是还是不行 - 建议列表中消失，要么不顾或调用 setAdapter 显示的建议保持不变。

This method is called, but doesn't work -- the list of suggestions either disappears or the displayed suggestions remain unchanged despite the call to setAdapter.

这甚至正确的做法？我看了看 SimpleCursorAdapter 却不见如何注册我的Web服务作为一个内容提供商。 （这是形式 http://www.blah.com/query?term=XX ，其中XX的从我的应用程序输入，响应是字符串的JSON数组）。

Is this even the right approach? I looked at SimpleCursorAdapter but couldn't see how to register my web service as a content provider. (It's of the form http://www.blah.com/query?term=XX, where the XX is the input from my app, and the response is a JSON Array of strings.)

推荐答案

这是我如何更新我AutoCompleteTextView：

This is how I update my AutoCompleteTextView:

String[] data = terms.toArray(new String[terms.size()]);  // terms is a List<String>
ArrayAdapter<?> adapter = new ArrayAdapter<Object>(activity, android.R.layout.simple_dropdown_item_1line, data);
keywordField.setAdapter(adapter);  // keywordField is a AutoCompleteTextView
if(terms.size() < 40) keywordField.setThreshold(1); 
else keywordField.setThreshold(2);

现在当然，这是静态的，不以过度的空气处理的建议，但是，我也可以建议你通知适配器改变，你把它分配给了AutoCompleteTextView后：

Now of course, this is static and doesn't deal with an over-the-air suggestions but, I can also suggest you to notify adapter for the changes after you assign it to the AutoCompleteTextView:

adapter.notifyDataSetChanged();   

希望这有助于。

-serkan

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