Question

我已成功将我的AutoCompleteTextView链接到MySQL中的数据，此外我正在使用AsyncTask。我想知道的是如何在TextView中显示下拉列表。我知道我正确地获取数据，因为它显示在我的 System.err.println（）方法中。这是我的代码..

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

    // This is an issue I do not know how to hook
    // My autocompleteTextview here    
   AutoLocation mytask= new AutoLocation();
        mytask.execute();

    }

  private class AutoLocation extends AsyncTask<String,String,String> {
        String line,tryy="";
    AutoCompleteTextView locationupdate;
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            locationupdate=(AutoCompleteTextView)findViewById(R.id.locationupdate);
        }




        @Override
        protected String doInBackground(String...params) {

            try {

                InputStream in = new BufferedInputStream(conn.getInputStream());
                BufferedReader reader = new BufferedReader(new InputStreamReader(in));
  // Other code here that I omitted because it is correct

                while ((line = reader.readLine()) != null) {

                    tryy+=   result.append(line);
                }
   // tryy contains the MySQL data and it works successfully
   // because I can see output in System.err.println()
                System.err.println(tryy);
            }
            catch (IOException e) {
                e.printStackTrace();
            }

            return tryy;
        }


        protected void onPostExecute(List<String> result)
        {
       // How can I pass tryy into my adapter here?

        ArrayAdapter<String> adapter= new ArrayAdapter<>
 (Httpentity.this,android.R.layout.simple_dropdown_item_1line,result);
                locationupdate.setAdapter(adapter);

        }
        //Async Ends
        }

从上面可以看出， tryy 字符串包含来自MySQL的数据。我只是不知道如何将其传递给 onPostExecute 中的适配器。另一个问题仅仅是我现在如何将其传递给onCreate方法？例如，如果这是一个click方法，那么你将使用setOnclick然后在点击时执行Async，但是对于AutocompleteTextview呢？这是关于TextWatcher的，但我似乎无法实现任何建议都会很棒。 AutoCompleteTextView with MySQL Data

Answer 1

ArrayAdapter<String> adapter= new ArrayAdapter<>(Httpentity.this,android.R.layout.simple_dropdown_item_1line,result);
locationupdate.setAdapter(adapter);

之后放locationupdate.showDropDown();

android autocompletetextview里面的asynctask没有显示

1 个答案: