当我在AutoCompleteTextView（mSearchText）中键入文本时，自动完成预测不会显示在MapsActivity中。
我尝试通过以下链接遵循本教程：well。 最近已弃用了其中使用的某些方法，因此我查看了https://www.youtube.com/watch?v=6Trdd9EnmqY&list=PLgCYzUzKIBE-vInwQhGSdnbyJ62nixHCt&index=8上的文档，特别是“以编程方式获取位置预测”和“迁移到New Places SDK客户端”。我还遵循了同一个人的指南来设置我的API密钥，我认为这不应该成为问题。这是我的第一个Android应用程序，也是我在此站点上的第一个问题，所以请耐心等待。
Places.initialize(getApplicationContext(), getString(R.string.google_maps_API_key));
PlacesClient placesClient = Places.createClient(this);
FindAutocompletePredictionsRequest request = FindAutocompletePredictionsRequest.builder()
.setLocationBias(RECTANGULAR_BOUNDS)
.setQuery(mSearchText.getText().toString())
.build();
placesClient.findAutocompletePredictions(request).addOnSuccessListener((response) -> {
for (AutocompletePrediction prediction : response.getAutocompletePredictions()) {
Log.i(TAG, prediction.getPlaceId());
Log.i(TAG, prediction.getPrimaryText(null).toString());
}
}).addOnFailureListener((exception) -> {
if (exception instanceof ApiException) {
ApiException apiException = (ApiException) exception;
Log.e(TAG, "Place not found: " + apiException.getStatusCode());
}
});
“自动完成”预测应随用户在搜索栏中的输入而显示，但不会发生。我也没有从听众那里得到任何日志。
答案 0 :(得分：3)
build.gradle（Module：app）
implementation 'com.google.android.gms:play-services-maps:16.0.0'
implementation 'com.google.android.gms:play-services-location:16.0.0'
implementation 'com.google.android.gms:play-services-places:16.0.0'
implementation 'com.google.android.libraries.places:places:1.1.0'
活动布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:padding="15dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".activity.MapsActivity">
<EditText
android:id="@+id/place_search"
android:hint="Search"
android:inputType="textPostalAddress"
android:padding="15dp"
android:layout_marginBottom="15dp"
android:drawableLeft="@drawable/places_ic_search"
android:background="@drawable/edit_text_border"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/places_recycler_view"
android:background="#FFF"
android:orientation="vertical"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</androidx.recyclerview.widget.RecyclerView>
</LinearLayout>
活动
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
import com.google.android.libraries.places.api.Places;
import com.google.android.libraries.places.api.model.Place;
import com.zaaibo.drive.R;
import com.zaaibo.drive.adapter.PlacesAutoCompleteAdapter;
public class MapsActivity extends AppCompatActivity implements PlacesAutoCompleteAdapter.ClickListener{
private PlacesAutoCompleteAdapter mAutoCompleteAdapter;
private RecyclerView recyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings);
Places.initialize(this, getResources().getString(R.string.google_maps_key));
recyclerView = (RecyclerView) findViewById(R.id.places_recycler_view);
((EditText) findViewById(R.id.place_search)).addTextChangedListener(filterTextWatcher);
mAutoCompleteAdapter = new PlacesAutoCompleteAdapter(this);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
mAutoCompleteAdapter.setClickListener(this);
recyclerView.setAdapter(mAutoCompleteAdapter);
mAutoCompleteAdapter.notifyDataSetChanged();
}
private TextWatcher filterTextWatcher = new TextWatcher() {
public void afterTextChanged(Editable s) {
if (!s.toString().equals("")) {
mAutoCompleteAdapter.getFilter().filter(s.toString());
if (recyclerView.getVisibility() == View.GONE) {recyclerView.setVisibility(View.VISIBLE);}
} else {
if (recyclerView.getVisibility() == View.VISIBLE) {recyclerView.setVisibility(View.GONE);}
}
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
public void onTextChanged(CharSequence s, int start, int before, int count) { }
};
@Override
public void click(Place place) {
Toast.makeText(this, place.getAddress()+", "+place.getLatLng().latitude+place.getLatLng().longitude, Toast.LENGTH_SHORT).show();
}
}
适配器
import android.content.Context;
import android.graphics.Typeface;
import android.text.style.CharacterStyle;
import android.text.style.StyleSpan;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.google.android.gms.common.api.ApiException;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.gms.tasks.Task;
import com.google.android.gms.tasks.Tasks;
import com.google.android.libraries.places.api.model.AutocompletePrediction;
import com.google.android.libraries.places.api.model.AutocompleteSessionToken;
import com.google.android.libraries.places.api.model.Place;
import com.google.android.libraries.places.api.net.FetchPlaceRequest;
import com.google.android.libraries.places.api.net.FetchPlaceResponse;
import com.google.android.libraries.places.api.net.FindAutocompletePredictionsRequest;
import com.google.android.libraries.places.api.net.FindAutocompletePredictionsResponse;
import com.google.android.libraries.places.api.net.PlacesClient;
import com.zaaibo.drive.R;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
public class PlacesAutoCompleteAdapter extends RecyclerView.Adapter<PlacesAutoCompleteAdapter.PredictionHolder> implements Filterable {
private static final String TAG = "PlacesAutoAdapter";
private ArrayList<PlaceAutocomplete> mResultList = new ArrayList<>();
private Context mContext;
private CharacterStyle STYLE_BOLD;
private CharacterStyle STYLE_NORMAL;
private final PlacesClient placesClient;
private ClickListener clickListener;
public PlacesAutoCompleteAdapter(Context context) {
mContext = context;
STYLE_BOLD = new StyleSpan(Typeface.BOLD);
STYLE_NORMAL = new StyleSpan(Typeface.NORMAL);
placesClient = com.google.android.libraries.places.api.Places.createClient(context);
}
public void setClickListener(ClickListener clickListener) {
this.clickListener = clickListener;
}
public interface ClickListener {
void click(Place place);
}
/**
* Returns the filter for the current set of autocomplete results.
*/
@Override
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
// Skip the autocomplete query if no constraints are given.
if (constraint != null) {
// Query the autocomplete API for the (constraint) search string.
mResultList = getPredictions(constraint);
if (mResultList != null) {
// The API successfully returned results.
results.values = mResultList;
results.count = mResultList.size();
}
}
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
if (results != null && results.count > 0) {
// The API returned at least one result, update the data.
notifyDataSetChanged();
} else {
// The API did not return any results, invalidate the data set.
//notifyDataSetInvalidated();
}
}
};
}
private ArrayList<PlaceAutocomplete> getPredictions(CharSequence constraint) {
final ArrayList<PlaceAutocomplete> resultList = new ArrayList<>();
// Create a new token for the autocomplete session. Pass this to FindAutocompletePredictionsRequest,
// and once again when the user makes a selection (for example when calling fetchPlace()).
AutocompleteSessionToken token = AutocompleteSessionToken.newInstance();
//https://gist.github.com/graydon/11198540
// Use the builder to create a FindAutocompletePredictionsRequest.
FindAutocompletePredictionsRequest request = FindAutocompletePredictionsRequest.builder()
// Call either setLocationBias() OR setLocationRestriction().
//.setLocationBias(bounds)
//.setCountry("BD")
//.setTypeFilter(TypeFilter.ADDRESS)
.setSessionToken(token)
.setQuery(constraint.toString())
.build();
Task<FindAutocompletePredictionsResponse> autocompletePredictions = placesClient.findAutocompletePredictions(request);
// This method should have been called off the main UI thread. Block and wait for at most
// 60s for a result from the API.
try {
Tasks.await(autocompletePredictions, 60, TimeUnit.SECONDS);
} catch (ExecutionException | InterruptedException | TimeoutException e) {
e.printStackTrace();
}
if (autocompletePredictions.isSuccessful()) {
FindAutocompletePredictionsResponse findAutocompletePredictionsResponse = autocompletePredictions.getResult();
if (findAutocompletePredictionsResponse != null)
for (AutocompletePrediction prediction : findAutocompletePredictionsResponse.getAutocompletePredictions()) {
Log.i(TAG, prediction.getPlaceId());
resultList.add(new PlaceAutocomplete(prediction.getPlaceId(), prediction.getPrimaryText(STYLE_NORMAL).toString(), prediction.getFullText(STYLE_BOLD).toString()));
}
return resultList;
} else {
return resultList;
}
}
@NonNull
@Override
public PredictionHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
LayoutInflater layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View convertView = layoutInflater.inflate(R.layout.place_recycler_item_layout, viewGroup, false);
return new PredictionHolder(convertView);
}
@Override
public void onBindViewHolder(@NonNull PredictionHolder mPredictionHolder, final int i) {
mPredictionHolder.address.setText(mResultList.get(i).address);
mPredictionHolder.area.setText(mResultList.get(i).area);
}
@Override
public int getItemCount() {
return mResultList.size();
}
public PlaceAutocomplete getItem(int position) {
return mResultList.get(position);
}
public class PredictionHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private TextView address, area;
private LinearLayout mRow;
PredictionHolder(View itemView) {
super(itemView);
area = itemView.findViewById(R.id.place_area);
address = itemView.findViewById(R.id.place_address);
mRow = itemView.findViewById(R.id.place_item_view);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
PlaceAutocomplete item = mResultList.get(getAdapterPosition());
if (v.getId() == R.id.place_item_view) {
String placeId = String.valueOf(item.placeId);
List<Place.Field> placeFields = Arrays.asList(Place.Field.ID, Place.Field.NAME, Place.Field.LAT_LNG, Place.Field.ADDRESS);
FetchPlaceRequest request = FetchPlaceRequest.builder(placeId, placeFields).build();
placesClient.fetchPlace(request).addOnSuccessListener(new OnSuccessListener<FetchPlaceResponse>() {
@Override
public void onSuccess(FetchPlaceResponse response) {
Place place = response.getPlace();
clickListener.click(place);
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception exception) {
if (exception instanceof ApiException) {
Toast.makeText(mContext, exception.getMessage() + "", Toast.LENGTH_SHORT).show();
}
}
});
}
}
}
/**
* Holder for Places Geo Data Autocomplete API results.
*/
public class PlaceAutocomplete {
public CharSequence placeId;
public CharSequence address, area;
PlaceAutocomplete(CharSequence placeId, CharSequence area, CharSequence address) {
this.placeId = placeId;
this.area = area;
this.address = address;
}
@Override
public String toString() {
return area.toString();
}
}
}
答案 1 :(得分：2)
public class PlaceArrayAdapter extends ArrayAdapter<PlaceArrayAdapter.PlaceAutocomplete> implements Filterable {
private static final String TAG = "PlaceArrayAdapter";
private final PlacesClient placesClient;
private RectangularBounds mBounds;
private ArrayList<PlaceAutocomplete> mResultList = new ArrayList<>();
public Context context;
/**
* Constructor
*
* @param context Context
* @param resource Layout resource
* @param bounds Used to specify the search bounds
* @param filter Used to specify place types
*/
public PlaceArrayAdapter(Context context, int resource, RectangularBounds bounds) {
super(context, resource);
this.context = context;
mBounds = bounds;
placesClient = com.google.android.libraries.places.api.Places.createClient(context);
}
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
View view = super.getView(position, convertView, parent);
TypefaceHelper.typeface(view);
return view;
}
@Override
public int getCount() {
if (mResultList == null)
return 0;
else
return mResultList.size();
}
@Override
public PlaceAutocomplete getItem(int position) {
return mResultList.get(position);
}
private ArrayList<PlaceAutocomplete> getPredictions(CharSequence constraint) {
final ArrayList<PlaceAutocomplete> resultList = new ArrayList<>();
// Create a new token for the autocomplete session. Pass this to FindAutocompletePredictionsRequest,
// and once again when the user makes a selection (for example when calling fetchPlace()).
AutocompleteSessionToken token = AutocompleteSessionToken.newInstance();
// Use the builder to create a FindAutocompletePredictionsRequest.
FindAutocompletePredictionsRequest request = FindAutocompletePredictionsRequest.builder()
// Call either setLocationBias() OR setLocationRestriction().
// .setLocationBias(bounds)
.setLocationBias(mBounds)
//.setCountry("au")
// .setTypeFilter(TypeFilter.ADDRESS)
.setSessionToken(token)
.setQuery(constraint.toString())
.build();
Task<FindAutocompletePredictionsResponse> autocompletePredictions = placesClient.findAutocompletePredictions(request);
// This method should have been called off the main UI thread. Block and wait for at most
// 60s for a result from the API.
try {
Tasks.await(autocompletePredictions, 60, TimeUnit.SECONDS);
} catch (ExecutionException | InterruptedException | TimeoutException e) {
e.printStackTrace();
}
if (autocompletePredictions.isSuccessful()) {
FindAutocompletePredictionsResponse findAutocompletePredictionsResponse = autocompletePredictions.getResult();
if (findAutocompletePredictionsResponse != null)
for (com.google.android.libraries.places.api.model.AutocompletePrediction prediction : findAutocompletePredictionsResponse.getAutocompletePredictions()) {
Log.i(TAG, prediction.getPlaceId());
Log.i(TAG, prediction.getPrimaryText(null).toString());
resultList.add(new PlaceAutocomplete(prediction.getPlaceId(), prediction.getFullText(null).toString()));
}
return resultList;
} else {
return resultList;
}
}
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
if (constraint != null) {
// Query the autocomplete API for the entered constraint
Log.d(TAG, "Before Prediction");
mResultList = getPredictions(constraint);
Log.d(TAG, "After Prediction");
if (mResultList != null) {
// Results
results.values = mResultList;
results.count = mResultList.size();
}
}
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
if (results != null && results.count > 0) {
// The API returned at least one result, update the data.
notifyDataSetChanged();
} else {
// The API did not return any results, invalidate the data set.
notifyDataSetInvalidated();
}
}
};
return filter;
}
public class PlaceAutocomplete {
public CharSequence placeId;
public CharSequence description;
PlaceAutocomplete(CharSequence placeId, CharSequence description) {
this.placeId = placeId;
this.description = description;
}
@Override
public String toString() {
return description.toString();
}
}
}
/* Now call adapter from activity */
autoCompleteTextView = findViewById(R.id.autoCompleteTextView);
autoCompleteTextView.setThreshold(3);
//autoCompleteTextView.setOnItemClickListener(mAutocompleteClickListener);
mPlaceArrayAdapter = new PlaceArrayAdapter(this, R.layout.adapter_place_array, CURRENT_LOCATION_BONDS);
答案 2 :(得分：0)
在启用 Google Places API 后，我使用了适配器类：-
public class PlaceAutoCompleteAdapter
extends ArrayAdapter<AutocompletePrediction> implements Filterable {
private static final String TAG = "PlaceAutoCompleteAd";
private static final CharacterStyle STYLE_BOLD = new StyleSpan(Typeface.BOLD);
/**
* Current results returned by this adapter.
*/
private ArrayList<AutocompletePrediction> mResultList;
/**
* Handles autocomplete requests.
*/
private GoogleApiClient mGoogleApiClient;
/**
* The bounds used for Places Geo Data autocomplete API requests.
*/
private LatLngBounds mBounds;
/**
* The autocomplete filter used to restrict queries to a specific set of place types.
*/
private AutocompleteFilter mPlaceFilter;
/**
* Initializes with a resource for text rows and autocomplete query bounds.
*
* @see android.widget.ArrayAdapter#ArrayAdapter(android.content.Context, int)
*/
public PlaceAutoCompleteAdapter(Context context, GoogleApiClient googleApiClient,
LatLngBounds bounds, AutocompleteFilter filter) {
super(context, android.R.layout.simple_expandable_list_item_2, android.R.id.text1);
mGoogleApiClient = googleApiClient;
mBounds = bounds;
mPlaceFilter = filter;
}
/**
* Sets the bounds for all subsequent queries.
*/
public void setBounds(LatLngBounds bounds) {
mBounds = bounds;
}
/**
* Returns the number of results received in the last autocomplete query.
*/
@Override
public int getCount() {
return mResultList.size();
}
/**
* Returns an item from the last autocomplete query.
*/
@Override
public AutocompletePrediction getItem(int position) {
return mResultList.get(position);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = super.getView(position, convertView, parent);
// Sets the primary and secondary text for a row.
// Note that getPrimaryText() and getSecondaryText() return a CharSequence that may contain
// styling based on the given CharacterStyle.
AutocompletePrediction item = getItem(position);
TextView textView1 = (TextView) row.findViewById(android.R.id.text1);
TextView textView2 = (TextView) row.findViewById(android.R.id.text2);
textView1.setText(item.getPrimaryText(STYLE_BOLD));
textView2.setText(item.getSecondaryText(STYLE_BOLD));
return row;
}
/**
* Returns the filter for the current set of autocomplete results.
*/
@Override
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
// We need a separate list to store the results, since
// this is run asynchronously.
ArrayList<AutocompletePrediction> filterData = new ArrayList<>();
// Skip the autocomplete query if no constraints are given.
if (constraint != null) {
// Query the autocomplete API for the (constraint) search string.
filterData = getAutocomplete(constraint);
}
results.values = filterData;
if (filterData != null) {
results.count = filterData.size();
} else {
results.count = 0;
}
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
if (results != null && results.count > 0) {
// The API returned at least one result, update the data.
mResultList = (ArrayList<AutocompletePrediction>) results.values;
notifyDataSetChanged();
} else {
// The API did not return any results, invalidate the data set.
notifyDataSetInvalidated();
}
}
@Override
public CharSequence convertResultToString(Object resultValue) {
// Override this method to display a readable result in the AutocompleteTextView
// when clicked.
if (resultValue instanceof AutocompletePrediction) {
return ((AutocompletePrediction) resultValue).getFullText(null);
} else {
return super.convertResultToString(resultValue);
}
}
};
}
/**
* Submits an autocomplete query to the Places Geo Data Autocomplete API.
* Results are returned as frozen AutocompletePrediction objects, ready to be cached.
* objects to store the Place ID and description that the API returns.
* Returns an empty list if no results were found.
* Returns null if the API client is not available or the query did not complete
* successfully.
* This method MUST be called off the main UI thread, as it will block until data is returned
* from the API, which may include a network request.
*
* @param constraint Autocomplete query string
* @return Results from the autocomplete API or null if the query was not successful.
* @see Places#GEO_DATA_API#getAutocomplete(CharSequence)
* @see AutocompletePrediction#freeze()
*/
private ArrayList<AutocompletePrediction> getAutocomplete(CharSequence constraint) {
if (mGoogleApiClient.isConnected()) {
Log.i(TAG, "Starting autocomplete query for: " + constraint);
// Submit the query to the autocomplete API and retrieve a PendingResult that will
// contain the results when the query completes.
PendingResult<AutocompletePredictionBuffer> results =
Places.GeoDataApi
.getAutocompletePredictions(mGoogleApiClient, constraint.toString(),
mBounds, mPlaceFilter);
// This method should have been called off the main UI thread. Block and wait for at most 60s
// for a result from the API.
AutocompletePredictionBuffer autocompletePredictions = results
.await(60, TimeUnit.SECONDS);
// Confirm that the query completed successfully, otherwise return null
final Status status = autocompletePredictions.getStatus();
if (!status.isSuccess()) {
Toast.makeText(getContext(), "Error contacting API: " + status.toString(),
Toast.LENGTH_SHORT).show();
Log.e(TAG, "Error getting autocomplete prediction API call: " + status.toString());
autocompletePredictions.release();
return null;
}
Log.i(TAG, "Query completed. Received " + autocompletePredictions.getCount()
+ " predictions.");
// Freeze the results immutable representation that can be stored safely.
return DataBufferUtils.freezeAndClose(autocompletePredictions);
}
Log.e(TAG, "Google API client is not connected for autocomplete query.");
return null;
}
}
我也知道这个给定的视频链接
答案 3 :(得分：0)
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Spinner;
import android.widget.Toast;
import com.google.android.gms.location.places.AutocompleteFilter;
import com.google.android.gms.location.places.AutocompletePrediction;
import com.google.android.gms.location.places.AutocompletePredictionBufferResponse;
import com.google.android.gms.location.places.GeoDataClient;
import com.google.android.gms.location.places.Place;
import com.google.android.gms.location.places.Places;
import com.google.android.gms.location.places.ui.PlaceAutocomplete;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import java.util.ArrayList;
import java.util.List;
public class AutoCompleteActivity extends AppCompatActivity {
public static final String TAG = "AutoCompleteActivity";
private static final int AUTO_COMP_REQ_CODE = 2;
protected GeoDataClient geoDataClient;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.custom_auto_complete);
Toolbar tb = findViewById(R.id.toolbar);
setSupportActionBar(tb);
tb.setSubtitle("Auto Complete");
//set place types spinner data from array
Spinner placeType = findViewById(R.id.place_type);
ArrayAdapter<CharSequence> spinnerAdapter =
ArrayAdapter.createFromResource(this,
R.array.placeTypes, android.R.layout.simple_spinner_item);
spinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
placeType.setAdapter(spinnerAdapter);
//Set adapter for autocomplete text view
AutoCompleteTextView searchPlace = findViewById(R.id.search_place);
CustomAutoCompleteAdapter adapter = new CustomAutoCompleteAdapter(this);
searchPlace.setAdapter(adapter);
searchPlace.setOnItemClickListener(onItemClickListener);
}
private AdapterView.OnItemClickListener onItemClickListener =
new AdapterView.OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Toast.makeText(AutoCompleteActivity.this,
"selected place "
+ ((zoftino.com.places.Place)adapterView.
getItemAtPosition(i)).getPlaceText()
, Toast.LENGTH_SHORT).show();
//do something with the selection
searchScreen();
}
};
public void searchScreen(){
Intent i = new Intent();
i.setClass(this, AutoCompleteActivity.class);
startActivity(i);
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".AutoCompleteActivity">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary" />
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp">
<android.support.design.widget.TextInputLayout
android:id="@+id/country_l"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent">
<android.support.design.widget.TextInputEditText
android:id="@+id/country"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Country"/>
</android.support.design.widget.TextInputLayout>
<Spinner
android:id="@+id/place_type"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/country_l"></Spinner>
<AutoCompleteTextView
android:id="@+id/search_place"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:hint="Search Location"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/place_type">
</AutoCompleteTextView>
</android.support.constraint.ConstraintLayout>
</LinearLayout>
import android.app.Activity;
import android.content.Context;
import android.support.annotation.NonNull;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Filter;
import android.widget.Spinner;
import android.widget.TextView;
import com.google.android.gms.location.places.AutocompleteFilter;
import com.google.android.gms.location.places.AutocompletePrediction;
import com.google.android.gms.location.places.AutocompletePredictionBufferResponse;
import com.google.android.gms.location.places.GeoDataClient;
import com.google.android.gms.location.places.Places;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import java.util.ArrayList;
import java.util.List;
public class CustomAutoCompleteAdapter extends ArrayAdapter {
public static final String TAG = "CustomAutoCompAdapter";
private List<Place> dataList;
private Context mContext;
private GeoDataClient geoDataClient;
private CustomAutoCompleteAdapter.CustomAutoCompleteFilter listFilter =
new CustomAutoCompleteAdapter.CustomAutoCompleteFilter();
private TextView country;
private Spinner placeType;
private int[] placeTypeValues;
public CustomAutoCompleteAdapter(Context context) {
super(context, android.R.layout.simple_dropdown_item_1line,
new ArrayList<Place>());
mContext = context;
//get GeoDataClient
geoDataClient = Places.getGeoDataClient(mContext, null);
//get country textview, placetype spinner to get
// current values to perform research
country = ((Activity) context).findViewById(R.id.country);
placeType = ((Activity) context).findViewById(R.id.place_type);
//spinner value map from array resources
placeTypeValues = ((Activity) context).getResources().
getIntArray(R.array.placeTypesValue);
}
@Override
public int getCount() {
return dataList.size();
}
@Override
public Place getItem(int position) {
return dataList.get(position);
}
@Override
public View getView(int position, View view, @NonNull ViewGroup parent) {
if (view == null) {
view = LayoutInflater.from(parent.getContext())
.inflate(android.R.layout.simple_dropdown_item_1line,
parent, false);
}
TextView textOne = view.findViewById(android.R.id.text1);
textOne.setText(dataList.get(position).getPlaceText());
return view;
}
@NonNull
@Override
public Filter getFilter() {
return listFilter;
}
public class CustomAutoCompleteFilter extends Filter {
private Object lock = new Object();
private Object lockTwo = new Object();
private boolean placeResults = false;
@Override
protected FilterResults performFiltering(CharSequence prefix) {
FilterResults results = new FilterResults();
placeResults = false;
final List<Place> placesList = new ArrayList<>();
if (prefix == null || prefix.length() == 0) {
synchronized (lock) {
results.values = new ArrayList<Place>();
results.count = 0;
}
} else {
final String searchStrLowerCase = prefix.toString().toLowerCase();
Task<AutocompletePredictionBufferResponse> task
= getAutoCompletePlaces(searchStrLowerCase);
task.addOnCompleteListener(new OnCompleteListener<AutocompletePredictionBufferResponse>() {
@Override
public void onComplete(@NonNull Task<AutocompletePredictionBufferResponse> task) {
if (task.isSuccessful()) {
Log.d(TAG, "Auto complete prediction successful");
AutocompletePredictionBufferResponse predictions = task.getResult();
Place autoPlace;
for (AutocompletePrediction prediction : predictions) {
autoPlace = new Place();
autoPlace.setPlaceId(prediction.getPlaceId());
autoPlace.setPlaceText(prediction.getFullText(null).toString());
placesList.add(autoPlace);
}
predictions.release();
Log.d(TAG, "Auto complete predictions size " + placesList.size());
} else {
Log.d(TAG, "Auto complete prediction unsuccessful");
}
//inform waiting thread about api call completion
placeResults = true;
synchronized (lockTwo) {
lockTwo.notifyAll();
}
}
});
//wait for the results from asynchronous API call
while (!placeResults) {
synchronized (lockTwo) {
try {
lockTwo.wait();
} catch (InterruptedException e) {
}
}
}
results.values = placesList;
results.count = placesList.size();
Log.d(TAG, "Autocomplete predictions size after wait" + results.count);
}
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
if (results.values != null) {
dataList = (ArrayList<Place>) results.values;
} else {
dataList = null;
}
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
private Task<AutocompletePredictionBufferResponse> getAutoCompletePlaces(String query) {
//create autocomplete filter using data from filter Views
AutocompleteFilter.Builder filterBuilder = new AutocompleteFilter.Builder();
filterBuilder.setCountry(country.getText().toString());
filterBuilder.setTypeFilter(placeTypeValues[placeType.getSelectedItemPosition()]);
Task<AutocompletePredictionBufferResponse> results =
geoDataClient.getAutocompletePredictions(query, null,
filterBuilder.build());
return results;
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<resources>
<array name="placeTypes">
<item>PlaceType</item>
<item>Address</item>
<item>Cities</item>
<item>Establishment</item>
<item>Geocode</item>
<item>Regions</item>
<item>All</item>
</array>
<array name="placeTypesValue">
<item>0</item>
<item>2</item>
<item>5</item>
<item>34</item>
<item>1007</item>
<item>4</item>
<item>0</item>
</array>
</resources>
public class Place {
private String placeId;
private String placeText;
public String getPlaceId() {
return placeId;
}
public void setPlaceId(String placeId) {
this.placeId = placeId;
}
public String getPlaceText() {
return placeText;
}
public void setPlaceText(String placeText) {
this.placeText = placeText;
}
public String toString(){
return placeText;
}
}
答案 4 :(得分：0)
在科特林
布局文件
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="@+id/mapLocation"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="@dimen/_2sdp"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toTopOf="@+id/autoCompleteEditText"/>
<androidx.appcompat.widget.AppCompatAutoCompleteTextView
android:id="@+id/autoCompleteEditText"
style="@style/TextViewCircularstdBold"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="0.9"
android:drawableEnd="@drawable/ic_icon_search_addpost"
android:gravity="start"
android:hint="Enter Location or Drag map to select location"
android:padding="@dimen/_10sdp"
android:singleLine="true"
android:textColor="@color/color_black_two"
android:textColorHint="@color/color_brown_grey"
android:textSize="@dimen/_11ssp"
app:layout_constraintStart_toStartOf="@+id/mapLocation"
app:layout_constraintEnd_toEndOf="@+id/mapLocation"
app:layout_constraintBottom_toBottomOf="parent"/>
活动中
class MainActivity :AppCompatActivity(), OnMapReadyCallback{
private var mMap: GoogleMap? = null
private var placeAdapter: PlaceArrayAdapter? = null
override fun onPostCreate(savedInstanceState: Bundle?) {
val mapFragment: SupportMapFragment? = supportFragmentManager.findFragmentById(R.id.mapLocation) as? SupportMapFragment
mapFragment?.getMapAsync(this)
placeAdapter = PlaceArrayAdapter(this, R.layout.layout_item_places, mPlacesClient)
autoCompleteEditText.setAdapter(placeAdapter)
autoCompleteEditText.onItemClickListener = AdapterView.OnItemClickListener { parent, _, position, _ ->
val place = parent.getItemAtPosition(position) as PlaceDataModel
autoCompleteEditText.apply {
setText(place.fullText)
setSelection(autoCompleteEditText.length())
}
}
}
}
PlaceArrayAdapter
class PlaceArrayAdapter(context: Context,val resource: Int, val mPlacesClient: PlacesClient) : ArrayAdapter<PlaceDataModel>(context, resource), Filterable {
private var mContext : Context = context
private var resultList = arrayListOf<PlaceDataModel>()
override fun getCount(): Int {
return when {
resultList.isNullOrEmpty() -> 0
else -> resultList.size
}
}
override fun getItem(position: Int): PlaceDataModel? {
return when {
resultList.isNullOrEmpty() -> null
else -> resultList[position]
}
}
override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
var view = convertView
val viewHolder: ViewHolder
if (view == null) {
viewHolder = ViewHolder()
view = LayoutInflater.from(context).inflate(resource, parent, false)
viewHolder.description = view.findViewById(R.id.searchFullText) as TextView
view.tag = viewHolder
} else {
viewHolder = view.tag as ViewHolder
}
bindView(viewHolder, resultList, position)
return view!!
}
private fun bindView(viewHolder: ViewHolder, place: ArrayList<PlaceDataModel>, position: Int) {
if (!place.isNullOrEmpty()) {
viewHolder.description?.text = place[position].fullText
}
}
override fun getFilter(): Filter {
return object : Filter() {
override fun publishResults(constraint: CharSequence?, results: FilterResults?) {
if (results != null && results.count > 0) {
mContext.runOnUiThread {
notifyDataSetChanged()
}
} else {
notifyDataSetInvalidated()
}
}
override fun performFiltering(constraint: CharSequence?): FilterResults {
val filterResults = FilterResults()
if (constraint != null) {
resultList.clear()
val address = getAutocomplete(mPlacesClient, constraint.toString())
address?.let {
for (i in address.indices) {
val item = address[i]
resultList.add(PlaceDataModel(item.placeId, item.getFullText(StyleSpan(Typeface.BOLD)).toString()))
}
}
filterResults.values = resultList
filterResults.count = resultList.size
}
return filterResults
}
}
}
internal class ViewHolder {
var description: TextView? = null
}
}
getAutocomplete方法（您可以添加适配器或扩展）
fun getAutocomplete(mPlacesClient: PlacesClient, constraint: CharSequence): List<AutocompletePrediction> {
var list = listOf<AutocompletePrediction>()
val token = AutocompleteSessionToken.newInstance()
val request = FindAutocompletePredictionsRequest.builder().setTypeFilter(TypeFilter.ADDRESS).setSessionToken(token).setQuery(constraint.toString()).build()
val prediction = mPlacesClient.findAutocompletePredictions(request)
try {
Tasks.await(prediction, TASK_AWAIT, TimeUnit.SECONDS)
} catch (e: ExecutionException) {
e.printStackTrace()
} catch (e: InterruptedException) {
e.printStackTrace()
} catch (e: TimeoutException) {
e.printStackTrace()
}
if (prediction.isSuccessful) {
val findAutocompletePredictionsResponse = prediction.result
findAutocompletePredictionsResponse?.let {
list = findAutocompletePredictionsResponse.autocompletePredictions
}
return list
}
return list
}
R.layout.layout_item_places
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<androidx.appcompat.widget.AppCompatTextView
android:id="@+id/searchFullText"
style="@style/TextViewGraphikRegular"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="@dimen/_5sdp"
android:layout_marginEnd="@dimen/_8sdp"
android:ellipsize="end"
android:gravity="center_vertical"
android:maxLines="2"
android:padding="@dimen/_8sdp"
android:text="@{dataModel.fullText}"
android:textColor="@android:color/black"
android:textSize="@dimen/_10ssp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:text="Ahmedabad" />
答案 5 :(得分：0)
布局
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:id="@+id/et_search_bar"
style="@style/GreyEditTextStyle"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginStart="20dp"
android:layout_marginTop="20dp"
android:layout_marginEnd="20dp"
android:maxLines="1"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/btn_select_location"
style="@style/PrimaryButtonStyleThin"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_marginEnd="20dp"
android:elevation="7dp"
android:text="@string/text_select_location"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="@id/et_search_bar" />
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/rv_place_results"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:clipToPadding="false"
android:paddingStart="30dp"
app:layout_constraintEnd_toEndOf="@id/btn_select_location"
app:layout_constraintStart_toStartOf="@id/et_search_bar"
app:layout_constraintTop_toBottomOf="@id/btn_select_location" />
</androidx.constraintlayout.widget.ConstraintLayout>
RecyclerView 适配器
class PlacesResultAdapter(
var mContext: Context,
val onClick: (prediction: AutocompletePrediction) -> Unit,
) :
RecyclerView.Adapter<PlacesResultAdapter.ViewHolder>(), Filterable {
private var mResultList: ArrayList<AutocompletePrediction>? = arrayListOf()
private val placesClient: PlacesClient = Places.createClient(mContext)
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val view =
LayoutInflater.from(parent.context)
.inflate(R.layout.item_place_suggestions, parent, false)
return ViewHolder(view)
}
override fun getItemCount(): Int {
return mResultList!!.size
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
holder.onBind(position)
holder.itemView.setOnClickListener {
onClick(mResultList?.get(position)!!)
}
}
inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
fun onBind(position: Int) {
val res = mResultList?.get(position)
itemView.apply {
tv_address_title.text = res?.getPrimaryText(null)
tv_address_sub_title.text = res?.getSecondaryText(null)
}
}
}
override fun getFilter(): Filter {
return object : Filter() {
override fun performFiltering(constraint: CharSequence): FilterResults {
val results = FilterResults()
mResultList = getPredictions(constraint)
if (mResultList != null) {
results.values = mResultList
results.count = mResultList!!.size
}
return results
}
override fun publishResults(constraint: CharSequence, results: FilterResults) {
}
}
}
private fun getPredictions(constraint: CharSequence): ArrayList<AutocompletePrediction>? {
val result: ArrayList<AutocompletePrediction> = arrayListOf()
val token = AutocompleteSessionToken.newInstance()
val request =
FindAutocompletePredictionsRequest.builder() // Call either setLocationBias() OR setLocationRestriction().
//.setLocationBias(bounds)
//.setCountries("SG","LK")
//.setTypeFilter(TypeFilter.ADDRESS)
.setSessionToken(token)
.setQuery(constraint.toString())
.build()
placesClient.findAutocompletePredictions(request)
.addOnSuccessListener { response: FindAutocompletePredictionsResponse ->
result.addAll(response.autocompletePredictions)
notifyDataSetChanged()
}.addOnFailureListener { exception: Exception? ->
if (exception is ApiException) {
Log.e("TAG", "Place not found: " + exception.statusCode)
mContext.showToastLong("Place not found")
}
}
return result
}
}
活动代码示例
private fun init() {
val apiKey = getString(R.string.places_api_key)
if (!Places.isInitialized()) {
Places.initialize(this, apiKey)
}
val placesClient = Places.createClient(this)
placeAdapter = PlacesResultAdapter(this) { prediction ->
pickedLocation = prediction
et_search_bar.setText(prediction.getFullText(null).toString())
rv_place_results.gone()
}
rv_place_results.layoutManager = LinearLayoutManager(this)
rv_place_results.adapter = placeAdapter
et_search_bar.addTextChangedListener(object : TextWatcher {
override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
}
override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
}
override fun afterTextChanged(text: Editable?) {
if (text.toString().isNotEmpty()) {
placeAdapter!!.filter.filter(text.toString())
if (rv_place_results.isGone) {
rv_place_results.show()
}
} else {
if (rv_place_results.isVisible) {
rv_place_results.gone()
}
}
}
})
}