我正在使用自动完成文本视图来显示谷歌地方api的位置。如果用户输入下拉剂量的字符，我还将阈值设置为1。当用户输入2个字符时，我会发生这种情况。我不会知道为什么会这样。请帮帮我
代码
public class GetPlaces extends AsyncTask<String, String, String> {
private Context context;
private GetPlaces getPlaces;
private AutoCompleteTextView autoCompleteTextView;
private ProgressBar progressBar;
private static final String PLACES_API_BASE = "https://maps.googleapis.com/maps/api/place";
private static final String TYPE_AUTOCOMPLETE = "/autocomplete";
private static final String OUT_JSON = "/json";
private static final String API_KEY = "key=MY KEY";
private String INPUT = "INPUT";
private HttpURLConnection urlConnection = null;
private StringBuilder stringBuilder = null;
private URL url;
private InputStream iStream = null;
private double latitude;
private double longitude;
private ArrayAdapter<String> adapter;
private JSONObject jsonObject = null;
private JSONArray jsonArray = null;
private ArrayList<String> address = null;
public GetPlaces(Context context, String INPUT, AutoCompleteTextView autoCompleteTextView, ProgressBar progressBar, double latitude, double longitude) {
this.context = context;
this.INPUT = INPUT;
this.autoCompleteTextView = autoCompleteTextView;
this.progressBar = progressBar;
this.latitude = latitude;
this.longitude = longitude;
address = new ArrayList<>();
this.execute(INPUT);
}
@Override
protected String doInBackground(String... params) {
String response = "";
try {
INPUT = "input=" + URLEncoder.encode(params[0], "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
String types = "types=geocode";
// Sensor enabled
String sensor = "sensor=false";
String parameters = "";
if (latitude != 0 && longitude != 0) {
// Building the parameters for destionation to the web service
parameters = INPUT + "&" + types + "&location=" + latitude + "," + longitude + "&radius=500" + "&" + API_KEY + "&" + sensor;
} else {
// Building the parameters for source to the web service
parameters = INPUT + "&" + types + "&" + API_KEY + "&" + sensor;
}
stringBuilder = new StringBuilder(PLACES_API_BASE + TYPE_AUTOCOMPLETE + OUT_JSON);
stringBuilder.append("?" + parameters);
//connections is established here
try {
url = new URL(stringBuilder.toString());
urlConnection = (HttpURLConnection) url.openConnection();
// Reading data from url
iStream = urlConnection.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(iStream));
StringBuffer sb = new StringBuffer();
String line = "";
while ((line = br.readLine()) != null) {
sb.append(line);
}
response = sb.toString();
Log.e("Response", response);
br.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
iStream.close();
} catch (IOException e) {
e.printStackTrace();
}
urlConnection.disconnect();
}
return response;
}
@Override
protected void onPostExecute(String s) {
try {
jsonObject = new JSONObject(s);
if (jsonObject.get("predictions") instanceof JSONObject) {
} else if (jsonObject.get("predictions") instanceof JSONArray) {
jsonArray = jsonObject.getJSONArray("predictions");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject object = jsonArray.getJSONObject(i);
String addressValue = object.getString("description");
address.add(addressValue);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
if (address != null) {
adapter = new ArrayAdapter<String>(context, android.R.layout.simple_dropdown_item_1line, address);
autoCompleteTextView.setThreshold(1);
autoCompleteTextView.setAdapter(adapter);
progressBar.setVisibility(View.GONE);
}
}
}
XML
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ff0dffb7">
<AutoCompleteTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/act_get_source"
android:layout_margin="10dp"
android:hint="SOURCE"
android:gravity="center"
android:completionThreshold="1" />
<AutoCompleteTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/act_get_destination"
android:layout_margin="10dp"
android:hint="DESTINSTION"
android:layout_below="@+id/act_get_source"
android:gravity="center"
android:completionThreshold="1" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="45dp"
android:text="Clear"
android:visibility="gone"
android:id="@+id/bt_source_clear"
android:layout_alignParentTop="true"
android:layout_alignRight="@+id/act_get_source"
android:layout_alignEnd="@+id/act_get_source" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="45dp"
android:text="Clear"
android:id="@+id/bt_destination_clear"
android:visibility="gone"
android:layout_below="@+id/act_get_source"
android:layout_alignRight="@+id/act_get_destination"
android:layout_alignEnd="@+id/act_get_destination" />
<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/pb_source"
android:visibility="gone"
android:layout_alignParentTop="true"
android:layout_alignLeft="@+id/act_get_source"
android:layout_alignStart="@+id/act_get_source"
android:layout_alignBottom="@+id/act_get_source" />
<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/pb_destination"
android:visibility="gone"
android:layout_below="@+id/act_get_source"
android:layout_alignLeft="@+id/act_get_destination"
android:layout_alignStart="@+id/act_get_destination" />
</RelativeLayout>
答案 0 :(得分：0)
在onPostExecute中尝试这个
if (address != null) {
adapter = new ArrayAdapter<String>(context,android.R.layout.simple_dropdown_item_1line, address);
autoCompleteTextView.setThreshold(1);
autoCompleteTextView.setAdapter(adapter);
progressBar.setVisibility(View.GONE);
autoCompleteTextView.showDropDown();
}