我有一个数组＆＃34; array_topic_names＆＃34;一些字符串值（由数据库检索），我想将其填充为文本框中的建议列表。
Android代码：
public class create_form extends Activity implements OnItemSelectedListener, AdapterView.OnItemClickListener {
private AutoCompleteTextView edttxt1 = null;
private AutoCompleteTextView edt1 = null;
private AutoCompleteTextView edt3 = null;
protected void onCreate(Bundle savedInstanceState)
{
edttxt1 = (AutoCompleteTextView) findViewById(R.id.edttxt4);//topic1
edt1 = (AutoCompleteTextView) findViewById(R.id.edttxt2);//topic2new PostAsync2().execute();
super.onCreate(savedInstanceState);
edt3 = (AutoCompleteTextView) findViewById(R.id.edttxt45);//topic3
setContentView(R.layout.activity_create_form);
adapter2 = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, array_topic_names);
edttxt1.setThreshold(1);
//Set adapter to AutoCompleteTextView
edttxt1.setAdapter(adapter2);
edttxt1.setOnItemSelectedListener(this);
edttxt1.setOnItemClickListener(this);
edt1.setThreshold(1);
//Set adapter to AutoCompleteTextView
edt1.setAdapter(adapter2);
edt1.setOnItemSelectedListener(this);
edt1.setOnItemClickListener(this);
edt3.setThreshold(1);
//Set adapter to AutoCompleteTextView
edt3.setAdapter(adapter2);
edt3.setOnItemSelectedListener(this);
edt3.setOnItemClickListener(this);
}
class PostAsync2 extends AsyncTask<String, String, JSONObject> {
JSONParser jsonParser = new JSONParser();
private ProgressDialog pDialog;
private static final String LOGIN_URL = "http://10.0.3.2/topic_array_populate.php";
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
@Override
protected void onPreExecute() {
Log.d("preexec", "starting");
}
@Override
protected JSONObject doInBackground(String... args) {
try {
HashMap<String, String> params = new HashMap<>();
JSONObject json = jsonParser.makeHttpRequest(
LOGIN_URL, "POST", params);
if (json != null) {
Log.d("JSON result", json.toString());
return json;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(JSONObject json) {
int success = 0;
String message = "";
Log.d("post exec", "starting");
Log.d("json", json.toString());
if (pDialog != null && pDialog.isShowing()) {
pDialog.dismiss();
}
if (json != null) {
{
Log.d("json", "not null");
JSONArray data = null;
try {
data = json.getJSONArray("details");
Log.d("JSON result",json.toString());
for(int i=0;i<100;i++) {
JSONObject obj = data.getJSONObject(i);
Log.d("obj_value", obj.toString());
array_topic_names[i]=obj.toString().substring(15).replace("}","").replace("\"","");
Log.d("array_topic_names", array_topic_names[i]);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
try {
success = json.getInt(TAG_SUCCESS);
message = json.getString(TAG_MESSAGE);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
}
logcat的
06-27 13:52:47.812 11218-11218/com.example.somya.client_feedback_application D/post exec: starting
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/json: {"details":[{"topic_name":"abc"},{"topic_name":"xyz"},{"topic_name":"bbb"},{"topic_name":"ccc"},{"topic_name":"1a"},{"topic_name":"2b"},{"topic_name":"3c"}]}
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/json: not null
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/JSON result: {"details":[{"topic_name":"abc"},{"topic_name":"xyz"},{"topic_name":"bbb"},{"topic_name":"ccc"},{"topic_name":"1a"},{"topic_name":"2b"},{"topic_name":"3c"}]}
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/obj_value: {"topic_name":"abc"}
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/array_topic_names: abc
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/obj_value: {"topic_name":"xyz"}
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/array_topic_names: xyz
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/obj_value: {"topic_name":"bbb"}
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/array_topic_names: bbb
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/obj_value: {"topic_name":"ccc"}
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/array_topic_names: ccc
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/obj_value: {"topic_name":"1a"}
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/array_topic_names: 1a
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/obj_value: {"topic_name":"2b"}
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/array_topic_names: 2b
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/obj_value: {"topic_name":"3c"}
06-27 13:52:47.814 11218-11218/com.example.somya.client_feedback_application D/array_topic_names: 3c
我希望数组array_topic_names中的每个值都填充为我的文本框中的建议。我该怎么办？ 现在，没有错误，但也没有显示建议列表。 而且当硬编码那个数组时，它正在工作，在我从数据库中检索它之后，它无法工作。