我有一個適用於我的應用程序的自動完成適配器,我從Google Places API獲取json結果。我的麻煩是試圖讓結果顯示在屏幕上。我正在使用本指南:http://examples.javacodegeeks.com/android/android-google-places-autocomplete-api-example/過濾自動完成適配器的json結果
大多數情況下,代碼看起來很合理,但無論出於何種原因,我無法獲取任何內容以便將其打印到顯示器上。我真的不明白過濾器是如何工作的,也許有關如何與自動完成適配器一起工作的解釋會有所幫助。
我的onCreate是:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
buildGoogleApiClient();
setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
if (savedInstanceState != null) {
mIsResolving = savedInstanceState.getBoolean(KEY_IS_RESOLVING);
mShouldResolve = savedInstanceState.getBoolean(KEY_SHOULD_RESOLVE);
}
// Create the LocationRequest object
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY)
.setInterval(10 * 1000) //10 seconds, in milliseconds
.setFastestInterval(1 * 1000); //1 second, in milliseconds
Log.d(TAG, "GoogleApiClient built");
if (savedInstanceState != null) {
mSignInProgress = savedInstanceState
.getInt(SAVED_PROGRESS, STATE_DEFAULT);
}
mShouldResolve = true;
mGoogleApiClient.connect();
Log.d(TAG, "Starting sign-in");
AutoCompleteTextView autoCompView = (AutoCompleteTextView)
findViewById(R.id.autoCompleteTextView);
autoCompView.setAdapter(new GooglePlacesAutocompleteAdapter(this, R.layout.activity_maps));
autoCompView.setOnItemClickListener(this);
}
我爲獲得JSON的結果的方法是:
public ArrayList<String> autocomplete(String input) {
Log.d(TAG, "performSearch()");
ArrayList resultList = null;
AsyncTask<ArrayList<String>, Void, ArrayList>
myTask = new AsyncTask<ArrayList<String>, Void, ArrayList>() {
AutoCompleteTextView text = (AutoCompleteTextView)
findViewById(R.id.autoCompleteTextView);
private String input = text.getText().toString();
@Override
protected ArrayList doInBackground(ArrayList<String>... params) {
Log.d(TAG, "Starting Search");
ArrayList resultList = null;
HttpURLConnection conn = null;
StringBuilder jsonResults = new StringBuilder();
try {
KEYWORD = input;
ENDPOINT = Uri
.parse("https://maps.googleapis.com/maps/api/place/nearbysearch/json")
.buildUpon()
.appendQueryParameter("location", LOCATION)
.appendQueryParameter("radius", "10000")
.appendQueryParameter("keyword", KEYWORD)
.appendQueryParameter("key", API_KEY)
.build();
URL url = new URL(ENDPOINT.toString());
Log.d(TAG, "URL: " + url);
conn = (HttpURLConnection) url.openConnection();
InputStreamReader in = new InputStreamReader(conn.getInputStream());
// Load the results into a StringBuilder
int read;
char[] buff = new char[1024];
while ((read = in.read(buff)) != -1) {
jsonResults.append(buff, 0, read);
}
Log.d(TAG, jsonResults.toString());
} catch (MalformedURLException e) {
Log.e(TAG, "Error processing Places API URL", e);
return resultList;
} catch (IOException e) {
Log.e(TAG, "Error connecting to Places API", e);
return resultList;
} finally {
if (conn != null) {
conn.disconnect();
}
}
try {
// Create a JSON object hierarchy from the results
JSONObject jsonObj = new JSONObject(jsonResults.toString());
JSONArray predsJsonArray = jsonObj.getJSONArray("results");
// Extract the Place descriptions from the results
resultList = new ArrayList(predsJsonArray.length());
for (int i = 0; i < predsJsonArray.length(); i++) {
System.out.println(predsJsonArray.getJSONObject(i).getString("name"));
System.out.println(predsJsonArray.getJSONObject(i).getString("vicinity"));
System.out.println("=====================================================");
resultList.add(predsJsonArray.getJSONObject(i).getString("name"));
resultList.add(predsJsonArray.getJSONObject(i).getString("vicinity"));
}
} catch (JSONException e) {
Log.e(TAG, "Cannot process JSON results", e);
}
Log.d(TAG, resultList.toString());
return resultList;
}
};
myTask.execute();
Log.d(TAG, resultList.toString());
return resultList;
}
我的過濾器類:
class GooglePlacesAutocompleteAdapter extends ArrayAdapter implements Filterable {
private ArrayList resultList;
public GooglePlacesAutocompleteAdapter(Context context, int textViewResourceId) {
super(context, textViewResourceId);
}
@Override
public int getCount() {
return resultList.size();
}
@Override
public String getItem(int index) {
return (String) resultList.get(index);
}
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults filterResults = new FilterResults();
if (constraint != null) {
// Retrieve the autocomplete results.
resultList = autocomplete(constraint.toString());
// Assign the data to the FilterResults
filterResults.values = resultList;
filterResults.count = resultList.size();
}
return filterResults;
}
@Override
protected void publishResults(CharSequence constraint, Filter.FilterResults results) {
if (results != null && results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
};
return filter;
}
}
我知道我得到一個聲音結果從谷歌和我的建立陣列看起來像這樣(它包括名稱和附近):
[城全球市場,920東湖街#G10,明尼阿波利斯,該 錨魚&芯片,302第13大道東北,明尼阿波利斯,布拉斯卡 高級烤肉店,600東亨內大街,明尼阿波利斯,楔形 社區共管-OP,2105 Lyndale酒店大道南,明尼阿波利斯,陶自然 食品,2200亨內大街,明尼阿波利斯,新鮮&天然食品,1075 公路96西,聖保羅,全食市場,222亨內大街, 明尼阿波利斯,森艾歷森泰國,2422 Central Avenue Northeast, 明尼阿波利斯,密西西比市場天然食品合作社,622 Selby Avenue, 聖保羅,Eastside Food Co-Op,2551 Central Avenue Northeast, 明尼阿波利斯,Bills進口食品,721 West Lake Street,Minneapolis, Seoul Foods,1071 East Moore Lake Drive,明尼阿波利斯,蘇厄德社區 合作社 - 富蘭克林店,2823 East Franklin Avenue,Minneapolis,Foxy Falafel,791 Raymond Avenue,聖保羅,亞洲食品,1300 L'Orient Street,Saint Paul,Pohl Distributing Co,510 Kasota Avenue Southeast, Minneapolis,Rainbow Foods,1566 University Avenue西部,聖保羅, 蒲公英廚房卡車,800 Nicollet購物中心,明尼阿波利斯,世界街道 廚房,2743 Lyndale大道南#5,明尼阿波利斯,CES食品架, 明尼阿波利斯東19街]
任何幫助表示讚賞,謝謝!
[編輯] 這裏是我的activity_maps XML:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.hudsoncorp.zahudson.roadtrip.MapsActivity">
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:map="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/map"
tools:context="com.hudsoncorp.zahudson.roadtrip.MapsActivity"
android:name="com.google.android.gms.maps.SupportMapFragment"/>
<RelativeLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp">
<AutoCompleteTextView
android:id="@+id/autoCompleteTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:hint="Search location"
android:background="#FFFFFF"
android:textColor="#00000F"
android:theme="@android:style/Widget.Material.AutoCompleteTextView"
android:ems="10"
android:shadowColor="@color/background_floating_material_dark">
<requestFocus />
</AutoCompleteTextView>
</RelativeLayout>
</RelativeLayout>
我覺得這是工作,但它仍然沒有給我下拉。它也崩潰我的應用程序與錯誤「android.view.InflateException:二進制XML文件行#7:錯誤膨脹類片段」,然後「引起:java.lang.IllegalArgumentException:二進制XML文件行#7:重複ID 0x7f0d0090,將null標記爲null,或將父標識0xffffffff與com.google.android.gms.maps.SupportMapFragment的另一個片段「相關聯。我認爲這個錯誤出現在我的XML中,所以我將它添加到了問題中。有什麼想法? – zahudson95
因此,您在某個佈局XML文件中出現錯誤。發佈另一個關於你的佈局XML的問題。一旦你理清了,如果你仍然有自動完成問題,請在這裏發表評論,我們會再看一次。 –
哦,只是看到你的編輯。我不確定,但我認爲這是抱怨,因爲包含地圖片段的'RelativeLayout'沒有ID。 –