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안드로이드에 자동 완성 기능이있는 Google 거리 매트릭스가 포함 된 앱을 만드는 것입니다. 지금까지 저의 연구와 저서를 공부하면서 코드를 작성하는 것은 매우 어렵습니다. 지금까지 내가안드로이드에 자동 완성 기능이있는 Google 거리 매트릭스
https://developers.google.com/maps/documentation/distancematrix/#Introduction
에 갔다와 구글의 방향이 http://www.stackoverflow.com/questions/9142885/geocoder-autocomplete-in-android http://www.stackoverflow.com/questions/6456090/android-google-map-finding-distance/6456161#6456161
http://www.claytical.com/blog/android-dynamic-autocompletion-using-google-places-api을 기록 이러한 모든 링크는 정말 날 이해 도움이되지하고 난 요청의 개념을 이해 할 API 주소로 보내면 JSON이 반환되고 JSON을 "구문 분석"하고 필요한 정보를 추출해야합니다. 이는 필자의 경우 거리입니다. 하지만 내가 얻지 못하는 것은 Google지도 거리 매트릭스로부터 제안이있는 자동 완성을 만드는 방법과 이에 따라 원본과 목적지를 적절하게 보낼 수있는 방법입니다. 정말 실망스럽고 이것이 클레이 털 닷컴 (Claytical.com)에서 얻은 것입니다.
여기 여기의 main.java
package com.example.autocomplete;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
public class Main extends Activity {
/** Called when the activity is first created. */
public ArrayAdapter<String> adapter;
public AutoCompleteTextView textview;
public Object s;
class GetPlaces extends AsyncTask<String, Void, ArrayList<String>>
{
public ArrayAdapter<String> adapter;
public AutoCompleteTextView textview;
Object s;
@Override
// three dots is java for an array of strings
protected ArrayList<String> doInBackground(String... args)
{
Log.d("gottaGo", "doInBackground");
ArrayList<String> predictionsArr = new ArrayList<String>();
try
{
URL googlePlaces = new URL(
// URLEncoder.encode(url,"UTF-8");
"https://maps.googleapis.com/maps/api/place/autocomplete/json?input="+ URLEncoder.encode(s.toString(), "UTF-8") +"&types=geocode&language=en&sensor=true&key=<yourapikeygoeshere>");
URLConnection tc = googlePlaces.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(
tc.getInputStream()));
String line;
StringBuffer sb = new StringBuffer();
//take Google's legible JSON and turn it into one big string.
while ((line = in.readLine()) != null) {
sb.append(line);
}
//turn that string into a JSON object
JSONObject predictions = new JSONObject(sb.toString());
//now get the JSON array that's inside that object
JSONArray ja = new JSONArray(predictions.getString("predictions"));
for (int i = 0; i < ja.length(); i++) {
JSONObject jo = (JSONObject) ja.get(i);
//add each entry to our array
predictionsArr.add(jo.getString("description"));
}
} catch (IOException e)
{
Log.e("YourApp", "GetPlaces : doInBackground", e);
} catch (JSONException e)
{
Log.e("YourApp", "GetPlaces : doInBackground", e);
}
return predictionsArr;
}
//then our post
@Override
protected void onPostExecute(ArrayList<String> result)
{
Log.d("YourApp", "onPostExecute : " + result.size());
//update the adapter
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getBaseContext(), R.layout.item_list);
adapter.setNotifyOnChange(true);
//attach the adapter to textview
textview.setAdapter(adapter);
for (String string : result)
{
Log.d("YourApp", "onPostExecute : result = " + string);
adapter.add(string);
adapter.notifyDataSetChanged();
}
Log.d("YourApp", "onPostExecute : autoCompleteAdapter" + adapter.getCount());
}
private Context getBaseContext() {
// TODO Auto-generated method stub
return null;
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.layout.item_list);
final AutoCompleteTextView textView = (AutoCompleteTextView)
findViewById(R.id.autoCompleteTextView1);
adapter.setNotifyOnChange(true);
textView.setAdapter(adapter);
textView.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (count%3 == 1) {
adapter.clear();
GetPlaces task = new GetPlaces();
//now pass the argument in the textview to the task
task.execute(textView.getText().toString());
}
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
public void afterTextChanged(Editable s) {
}
});
}
}
내 main.xml에
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#dddddd">
<AutoCompleteTextView
android:id="@+id/autoCompleteTextView1"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:layout_marginTop="10dp" >
<requestFocus></requestFocus>
</AutoCompleteTextView>
마지막에게의 요청에 따라 로그 캣입니다.
05-14 17:41:38.163: E/Trace(1390): error opening trace file: No such file or directory (2)
05-14 17:41:39.323: D/gralloc_goldfish(1390): Emulator without GPU emulation detected.
05-14 17:41:45.284: D/gottaGo(1390): doInBackground
05-14 17:41:45.296: W/dalvikvm(1390): threadid=11: thread exiting with uncaught exception (group=0x40a13300)
05-14 17:41:45.314: E/AndroidRuntime(1390): FATAL EXCEPTION: AsyncTask #1
05-14 17:41:45.314: E/AndroidRuntime(1390): java.lang.RuntimeException: An error occured while executing doInBackground()
05-14 17:41:45.314: E/AndroidRuntime(1390): at android.os.AsyncTask$3.done(AsyncTask.java:299)
05-14 17:41:45.314: E/AndroidRuntime(1390): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
05-14 17:41:45.314: E/AndroidRuntime(1390): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
05-14 17:41:45.314: E/AndroidRuntime(1390): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
05-14 17:41:45.314: E/AndroidRuntime(1390): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
05-14 17:41:45.314: E/AndroidRuntime(1390): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
05-14 17:41:45.314: E/AndroidRuntime(1390): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
05-14 17:41:45.314: E/AndroidRuntime(1390): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
05-14 17:41:45.314: E/AndroidRuntime(1390): at java.lang.Thread.run(Thread.java:856)
05-14 17:41:45.314: E/AndroidRuntime(1390): Caused by: java.lang.NullPointerException
05-14 17:41:45.314: E/AndroidRuntime(1390): at com.example.autocomplete.Main$GetPlaces.doInBackground(Main.java:54)
05-14 17:41:45.314: E/AndroidRuntime(1390): at com.example.autocomplete.Main$GetPlaces.doInBackground(Main.java:1)
05-14 17:41:45.314: E/AndroidRuntime(1390): at android.os.AsyncTask$2.call(AsyncTask.java:287)
05-14 17:41:45.314: E/AndroidRuntime(1390): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
05-14 17:41:45.314: E/AndroidRuntime(1390): ... 5 more
05-14 17:41:47.584: I/Choreographer(1390): Skipped 31 frames! The application may be doing too much work on its main thread.
05-14 17:41:47.904: I/Process(1390): Sending signal. PID: 1390 SIG: 9
그것은 잘 시작하고 그것은 자동 완성 텍스트 뷰를 제공하지만 최대한 빨리 편지를 입력 할 때, 그것은 충돌합니다. 지금까지 읽어 주셔서 감사합니다. 미리 도움을 주셔서 감사합니다.
충돌이 발생하면 logcat을 게시 할 수 있습니까? – chopchop
logcat을 보여주기 위해 편집 됨 : – user1893343