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POlist items of HashMap in a list view, android
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  1. POlist items of HashMap in a list view, android
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    copied!<p>I am writing an android application to display the nearby locations, I have two activities; one to show locations on the map and the other is to list them in a ListView.</p> <p>in the first activity, I store the information about each place in a hashMap, these information includes: place name, place longitude and latitude, this is the code to store info in a HashMap:</p> <p>// Clears all the existing markers mGoogleMap.clear();</p> <pre><code> for(int i=0;i&lt;list.size();i++){ // Creating a marker MarkerOptions markerOptions = new MarkerOptions(); // Getting a place from the places list //HashMap&lt;String, String&gt; hmPlace = list.get(i); // Getting latitude of the place double lat = Double.parseDouble(hmPlace.get("lat")); // Getting longitude of the place double lng = Double.parseDouble(hmPlace.get("lng")); // Getting name String name = hmPlace.get("place_name"); // listP[i]=hmPlace.get("place_name"); Log.d("places=",hmPlace.get("place_name")); // Getting vicinity String vicinity = hmPlace.get("vicinity"); LatLng latLng = new LatLng(lat, lng); // Setting the position for the marker markerOptions.position(latLng); // Setting the title for the marker. //This will be displayed on taping the marker markerOptions.title(name + " : " + vicinity); // Placing a marker on the touched position Marker m = mGoogleMap.addMarker(markerOptions); // Linking Marker id and place reference mMarkerPlaceLink.put(m.getId(), hmPlace.get("reference")); } } </code></pre> <p>in this activity I have a button to direct me to the second activity which must list the nearby places in a ListView; this is the code for the button:</p> <pre><code>public void list_airports(View v) { Intent intent; switch (v.getId()) { case R.id.list_items: intent = new Intent(getApplicationContext(), List_airports.class); intent.putExtra("com.example.dashboard_our.hmPlace",hmPlace); startActivity(intent); } } </code></pre> <p>in the second activity I do this:</p> <pre><code>protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.list_airports); Bundle extras = getIntent().getExtras(); HashMap&lt;String, String&gt; places1=(HashMap&lt;String, String&gt;) extras.getSerializable("com.example.dashboard_our.hmPlace"); final ListView listview = (ListView) findViewById(R.id.list); list = new ArrayList&lt;String&gt;(); for (int i = 0; i &lt; places1.size(); ++i) { list.addAll(places1.values()); } } </code></pre> <p>but it just prints the first place's information many times, How could I solve this problem??</p> <p>This is the rest of the code:</p> <pre><code>final StableArrayAdapter adapter = new StableArrayAdapter(this, android.R.layout.simple_list_item_1, list); listview.setAdapter(adapter); listview.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView&lt;?&gt; parent, final View view, int position, long id) { final String item = (String) parent.getItemAtPosition(position); view.animate().setDuration(2000).alpha(0) .withEndAction(new Runnable() { @Override public void run() { list.remove(item); adapter.notifyDataSetChanged(); view.setAlpha(1); } }); } }); } private class StableArrayAdapter extends ArrayAdapter&lt;String&gt; { HashMap&lt;String, Integer&gt; mIdMap = new HashMap&lt;String, Integer&gt;(); public StableArrayAdapter(Context context, int textViewResourceId, List&lt;String&gt; objects) { super(context, textViewResourceId, objects); for (int i = 0; i &lt; objects.size(); ++i) { mIdMap.put(objects.get(i), i); } } @Override public long getItemId(int position) { String item = getItem(position); return mIdMap.get(item); } @Override public boolean hasStableIds() { return true; } } public static void printMap(Map mp) { Iterator it = mp.entrySet().iterator(); while (it.hasNext()) { Map.Entry pairs = (Map.Entry)it.next(); // System.out.println(pairs.getKey() + " = " + pairs.getValue()); list.add(pairs.toString()); it.remove(); // avoids a ConcurrentModificationException } } </code></pre> <p>this is the code of the 'do in background' which parses the Json and return places:</p> <pre><code>/** A class to parse the Google Places in JSON format */ private class ParserTask extends AsyncTask&lt;String, Integer, List&lt;HashMap&lt;String,String&gt;&gt;&gt;{ JSONObject jObject; // Invoked by execute() method of this object @Override protected List&lt;HashMap&lt;String,String&gt;&gt; doInBackground(String... jsonData) { // List&lt;HashMap&lt;String, String&gt;&gt; places = null; PlaceJSONParser placeJsonParser = new PlaceJSONParser(); try{ jObject = new JSONObject(jsonData[0]); /** Getting the parsed data as a List construct */ places = placeJsonParser.parse(jObject); }catch(Exception e){ Log.d("Exception",e.toString()); } return places; } </code></pre> <p>where places:</p> <pre><code> List&lt;HashMap&lt;String, String&gt;&gt; places; </code></pre>
 

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