如何在Android中使用API调用填充AutoCompleteTextView

Question

我想尝试从API获取食物项目列表，并在此基础上更新AutoCompleteTextView。

我试着在这里遵循答案，但没有成功：https://stackoverflow.com/a/36799955/7429535

这是我迄今为止的代码：

//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();
}
});
}

您可以在这里看到一个示例API响应：https://api.edamam.com/api/food-database/parser?ingr=red&app_id＝8ff4be18&app_key=f2bf020e6d3cf1a9989c2a2163fb720f

目前，这个代码是在apiFoods ArrayList中输入正确的食物名称，但它没有显示我在应用程序中可以选择的选项。

Answer 1

请注意，您在进行api调用之前很久就已经初始化了adadapter，因此我建议当您的api返回public void onSuccess(int statusCode, Header[] headers, byte[] responseBody)函数内的数据时，请按如下方式重新初始化适配器。

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();
}
});
}