java - 如何通过 API 调用填充 Android 中的 AutoCompleteTextView？

Question

我想尝试从 API 获取食品列表，并据此更新 AutoCompleteTextView。

我尝试按照这里的答案但无济于事: https://stackoverflow.com/a/36799955/7429535

这是我到目前为止的代码:

//Outside onCreate
List<String> apiFoods = new ArrayList<>();

//In onCreate
 AutoCompleteTextView autocomplete = (AutoCompleteTextView) findViewById(R.id.foodActv);
 final ArrayAdapter<String> autoAdapter = new ArrayAdapter<>(this, android.R.layout.simple_dropdown_item_1line, apiFoods);
 autocomplete.setAdapter(autoAdapter);

 autocomplete.addTextChangedListener(new TextWatcher() {
     @Override
     public void beforeTextChanged(CharSequence s, int start, int count, int after) {

     }

     @Override
     public void onTextChanged(CharSequence s, int start, int before, int count) {
         //retrieve data s
     }

     @Override
     public void afterTextChanged(Editable s) {
         retrieveData(s);
         autoAdapter.notifyDataSetChanged();
         Log.d("TAG", "foodsApi is " + apiFoods);
     }
});

//Below onCreate
private void retrieveData(Editable s)
{
    String text = s.toString();
    if(text.contains(" "))
    {
        text.replace(" ", "%20");
    }
    String url = "https://api.edamam.com/api/food-database/parser?ingr="+text+"&app_id=8ff4be18&app_key=f2bf020e6d3cf1a9989c2a2163fb720f";
    new AsyncHttpClient().get(url, new AsyncHttpResponseHandler() {
        @Override
        public void onSuccess(int statusCode, Header[] headers, byte[] responseBody)
        {
            try
            {
                JSONObject foodNames=new JSONObject(new String(responseBody));
                JSONArray jArray = foodNames.getJSONArray("hints");
                for(int i = 0; i < jArray.length(); i++)
                {
                    try
                    {
                        JSONObject hintItem = jArray.getJSONObject(i);
                        JSONObject foodItem = hintItem.getJSONObject("food");
                        String foodLabel = foodItem.getString("label");
                        apiFoods.add(foodLabel);
                    }
                    catch(JSONException e)
                    {

                    }
                }
            } catch (JSONException e)
            {
                e.printStackTrace();
            }
        }

        @Override
        public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
            Toast.makeText(getApplicationContext(), "API call failed", Toast.LENGTH_SHORT).show();
        }
    });
}

您可以在此处查看 API 响应示例:https://api.edamam.com/api/food-database/parser?ingr=red&app_id=8ff4be18&app_key=f2bf020e6d3cf1a9989c2a2163fb720f

目前，此代码正在将正确的食物名称输入到 apiFoods ArrayList 中，但它没有向我显示在应用程序中选择的选项。

Answer 1

请注意，您在进行 api 调用之前就已经初始化了 adataapter，因此我建议当您的 api 在 public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) 内返回数据时 函数，请按如下方式重新初始化您的适配器。

private void retrieveData(final AutoCompleteTextView s)
{
    String text = s.toString();
    if(text.contains(" "))
    {
        text.replace(" ", "%20");
    }
    String url = "https://api.edamam.com/api/food-database/parser?ingr="+text+"&app_id=8ff4be18&app_key=f2bf020e6d3cf1a9989c2a2163fb720f";
    new AsyncHttpClient().get(url, new AsyncHttpResponseHandler() {
        @Override
        public void onSuccess(int statusCode, Header[] headers, byte[] responseBody)
        {
            try
            {
                JSONObject foodNames=new JSONObject(new String(responseBody));
                JSONArray jArray = foodNames.getJSONArray("hints");
                for(int i = 0; i < jArray.length(); i++)
                {
                    try
                    {
                        JSONObject hintItem = jArray.getJSONObject(i);
                        JSONObject foodItem = hintItem.getJSONObject("food");
                        String foodLabel = foodItem.getString("label");
                        apiFoods.add(foodLabel);
                    }
                    catch(JSONException e)
                    {

                    }
                }

                autoAdapter = new ArrayAdapter<>(ActivityName.this, android.R.layout.simple_dropdown_item_1line, apiFoods);

 s.setAdapter(autoAdapter);

s.setThreshold(1);

        s.setAdapter(adapter);

            } catch (JSONException e)
            {
                e.printStackTrace();
            }
        }

        @Override
        public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
            Toast.makeText(getApplicationContext(), "API call failed", Toast.LENGTH_SHORT).show();
        }
    });
}