Database Users

Radiogroup and radiobutton selection in ExpandableListView

i've an ExpandableListView, where i can select different radiobutton choice in a radiobuttongroup. My problem: not all radiobuttons are selected...the behaviour is random.
this is my code
Code:
void prepareMainList(String data)
{
Document doc;
NodeList nl;
newsNotificationData = new ArrayList<Map<String, String>>(); //set this struct in other case
groupData = new ArrayList<Map<String, String>>();
childData = new ArrayList<List<Map<String, String>>>();
if ((data.compareTo("") != 0) && (data != null) )
{
doc = parser.getDomElement(data); // getting DOM element
nl = doc.getElementsByTagName(KEY_GROUP);
categoryList = new HashSet<CategoryClass>();
// looping through all song nodes <song>
for (int i = 0; i < nl.getLength(); i++)
{
// creating new HashMap
Map<String, String> curGroupMap = new HashMap<String, String>();
Map<String, String> curNewsMap = new HashMap<String, String>();
Element el = (Element) nl.item(i);
CategoryClass myCat = new CategoryClass();
myCat.id = parser.getValue(el, "id");
myCat.name = parser.getValue(el, KEY_NAME);
myCat.subCategory = new HashSet<TournamentClass>();
// adding each child node to HashMap key => value
curGroupMap.put(CATEGORY, parser.getValue(el, KEY_NAME));
Log.d("test", "category id added: " + myCat.id);
// adding HashList to ArrayList
groupData.add(curGroupMap);
//notification
curNewsMap.put("CID_" + myCat.id, getValueFromCategory(myCat.id));
newsNotificationData.add(curNewsMap);
NodeList ls = el.getElementsByTagName("girone");
//Log.d("test", "getDataFromWebService get children count : " + ls.getLength());
List<Map<String, String>> children = new ArrayList<Map<String, String>>();
for (int j = 0; j < ls.getLength(); j++)
{
Element elc = (Element) ls.item(j);
Map<String, String> curChildMap = new HashMap<String, String>();
TournamentClass myTournament = new TournamentClass();
myTournament.id = elc.getAttribute("id");
myTournament.name = parser.getValue(elc, KEY_CHILD_NAME);
curChildMap.put(TOURNAMENT, parser.getValue(elc, KEY_CHILD_NAME));
children.add(curChildMap);
myCat.subCategory.add(myTournament);
//notification
curNewsMap.put("TID_" + myTournament.id, "-1");
newsNotificationData.get(i).put("TID_" + myTournament.id, getValueFromTournament(myTournament.id));
}
childData.add(children);
categoryList.add(myCat);
//newsNotificationData.add(curNewsMap);
}
}
catList = (ExpandableListView) findViewById(R.id.expandableSettings);
catList.setClickable(true);
catList.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
Log.d("test", "GROUP PRESSED");
return false;
}
});
// Set up our adapter
mAdapter = new SimpleExpandableListAdapter(
this,
groupData,
R.layout.settings_header,
new String[] { CATEGORY, TOURNAMENT },
new int[] { R.id.settingsCatTitle, android.R.id.text2 },
childData,
R.layout.settings_child,
new String[] { CATEGORY, TOURNAMENT },
new int[] { android.R.id.text1, R.id.settingsSubTitle }
){
@Override
public View getGroupView (final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent)
{
//final View v = super.getChildView(groupPosition, childPosition, isLastChild, convertView, parent);
final View v = super.getGroupView(groupPosition, isExpanded, convertView, parent);
//Log.d("test", "get tournament selected");
TextView tv = (TextView)v.findViewById( R.id.settingsCatTitle );
String catSel = tv.getText().toString();
//get objects
String groupName = groupData.get(groupPosition).get("CATEGORY");
final CategoryClass myCat = getCategoryFromName(groupName);
RadioGroup groupNN;
// *** Gestisce l'header della categoria ***
groupNN = (RadioGroup) v.findViewById(R.id.radioGroupNN);
groupNN.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
@Override
public void onCheckedChanged(RadioGroup group, int checkedId)
{
//Log.d("Header chk", "id" + checkedId);
if(!isDataLoaded) return;
for (int i = 0, l = group.getChildCount(); i < l; i++)
{
RadioButton xRadio = (RadioButton) group.getChildAt(i);
xRadio.setBackgroundResource(R.drawable.setting_gradient_off);
xRadio.setTextColor(R.drawable.settings_gradient_on);
}
//-----change data to send
String notifValue = "0";
//get checked value
switch (checkedId)
{
case R.id.button_News:
notifValue = "0";
break;
case R.id.button_Notif:
notifValue = "1";
break;
case R.id.button_All:
notifValue = "2";
break;
case R.id.button_no:
notifValue = "-1";
break;
default:
break;
}
//set graphics on selected radio button
RadioButton radio = (RadioButton) v.findViewById(checkedId);
if (radio != null)
{
//radio.setTextSize(30);
// Marco Moscatelli 28/11/2013 - imposto il check a true
//radio.setChecked(true);
radio.setBackgroundResource(R.drawable.settings_gradient_on);
radio.setTextColor(Color.LTGRAY);
}
updateNewsNotificationCenter(groupPosition, myCat.id, null, notifValue);
isDataLoaded = false;
//Log.d("test", "------END SET CATEGORY------- ");
}
});
//-----data to send changed
isDataLoaded = false;
//set default schema
//String defaultbtnValue = null;
String defaultbtnValue = newsNotificationData.get(groupPosition).get("CID_" + myCat.id);
//Log.d("test", "check current cat id : "+ myCat.id);
RadioButton defNNRadio = null;
//Log.d("test", "defaultbtnValue : "+ defaultbtnValue);
if (defaultbtnValue == null)defaultbtnValue = "-1";
switch(Integer.parseInt(defaultbtnValue))
{
case 0:
defNNRadio = (RadioButton) v.findViewById(R.id.button_News);
break;
case 1:
defNNRadio = (RadioButton) v.findViewById(R.id.button_Notif);
break;
case 2:
defNNRadio = (RadioButton) v.findViewById(R.id.button_All);
break;
case -1:
defNNRadio = (RadioButton) v.findViewById(R.id.button_no);
break;
default:
break;
}
//set default button
for (int i = 0, l = groupNN.getChildCount(); i < l; i++)
{
RadioButton xRadio = (RadioButton) groupNN.getChildAt(i);
xRadio.setChecked(false);
xRadio.setBackgroundResource(R.drawable.setting_gradient_off);
xRadio.setTextColor(R.drawable.settings_gradient_on);
}
if (defNNRadio != null)
{
defNNRadio.setChecked(true);
defNNRadio.setBackgroundResource(R.drawable.settings_gradient_on);
defNNRadio.setTextColor(Color.LTGRAY);
}
return v;
}
@Override
public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
final View v = super.getChildView(groupPosition, childPosition, isLastChild, convertView, parent);
Log.d("test", "getChildView");
RadioGroup groupNN;
// *** gestisco i gironi della categoria ***
groupNN = (RadioGroup) v.findViewById(R.id.radioGroupNN_child);
//get objects
String groupName = groupData.get(groupPosition).get("CATEGORY");
final CategoryClass myCat = getCategoryFromName(groupName);
Map<String, String> childName = childData.get(groupPosition).get(childPosition);
final TournamentClass myTournament = getTournamentFromName(groupName, childName.get("TOURNAMENT"));
groupNN.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
@Override
public void onCheckedChanged(RadioGroup group, int checkedId)
{
//Log.d("Item chk", "id" + checkedId);
if(!isDataLoaded) return;
Log.d("test", "------INIT SET TOURNAMENT------- : " + myTournament.id);
for (int i = 0, l = group.getChildCount(); i < l; i++)
{
RadioButton xRadio = (RadioButton) group.getChildAt(i);
xRadio.setBackgroundResource(R.drawable.setting_gradient_off);
xRadio.setTextColor(color.SettingsTextOffColor);
}
//-----change data to send
String notifValue = "0";
//get checked value
switch (checkedId)
{
case R.id.button_News:
notifValue = "0";
break;
case R.id.button_Notif:
notifValue = "1";
break;
case R.id.button_All:
notifValue = "2";
break;
case R.id.button_no:
notifValue = "-1";
break;
default:
break;
}
//Get Tournament and keep id of it...after save notification mode in a struct and send all on POSTS
RadioButton radio = (RadioButton) v.findViewById(checkedId);
if (radio != null)
{
// Marco Moscatelli 28/11/2013 - Imposto il check a true
//radio.setChecked(true);
//group.check(radio.getId());
// end
radio.setBackgroundResource(R.drawable.settings_gradient_on);
radio.setTextColor(Color.LTGRAY);
}
//prepare data
updateNewsNotificationCenter(groupPosition, myCat.id, myTournament.id, notifValue);
Log.d("test", "------END SET TOURNAMENT------- ");
}
//}
});
//set default schema
String defaultbtnValue = newsNotificationData.get(groupPosition).get("TID_" + myTournament.id);
RadioButton defNNRadio = null;
//Log.d("test", "defaultbtnValue : "+ defaultbtnValue);
if (defaultbtnValue == null)defaultbtnValue = "-1";
switch(Integer.parseInt(defaultbtnValue))
{
case 0:
defNNRadio = (RadioButton) v.findViewById(R.id.button_News);
break;
case 1:
defNNRadio = (RadioButton) v.findViewById(R.id.button_Notif);
break;
case 2:
defNNRadio = (RadioButton) v.findViewById(R.id.button_All);
break;
case -1:
defNNRadio = (RadioButton) v.findViewById(R.id.button_no);
break;
}
for (int i = 0, l = groupNN.getChildCount(); i < l; i++)
{
RadioButton xRadio = (RadioButton) groupNN.getChildAt(i);
xRadio.setChecked(false);
xRadio.setBackgroundResource(R.drawable.setting_gradient_off);
xRadio.setTextColor(color.SettingsTextOffColor);
}
//set default schema
if (defNNRadio != null)
{
defNNRadio.setChecked(true);
defNNRadio.setBackgroundResource(R.drawable.settings_gradient_on);
defNNRadio.setTextColor(Color.LTGRAY);
}
//isDataLoaded = true;
return v;
}
thanks in advance

Loading a new fragment from an OnClick set in asyncTask

I have a fragment, which contains a button that when pressed loads a new fragment. The new fragment runs an async task to populate a listview with data.
I am running into trouble, trying to load a new fragment from the onClick. The problem is I can not get the getFragmentManager();
My async task looks like this:
Code:
public class GetStyleStatisticsJSON extends AsyncTask<String, Void, String> {
Context c;
private ProgressDialog Dialog;
android.support.v4.app.Fragment Fragment_one;
public GetStyleStatisticsJSON(Context context)
{
c = context;
Dialog = new ProgressDialog(c);
}
@Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
return readJSONFeed(arg0[0]);
}
protected void onPreExecute() {
Dialog.setMessage("Analyzing Statistics");
Dialog.setTitle("Loading");
Dialog.setCancelable(false);
Dialog.show();
}
protected void onPostExecute(String result){
//decode json here
try{
JSONArray jsonArray = new JSONArray(result);
//acces listview
ListView lv = (ListView) ((Activity) c).findViewById(R.id.yourStyleStatistics);
//make array list for beer
final List<StyleInfo> tasteList = new ArrayList<StyleInfo>();
for(int i = 0; i < jsonArray.length(); i++) {
String style = jsonArray.getJSONObject(i).getString("style");
String rate = jsonArray.getJSONObject(i).getString("rate");
String beerID = jsonArray.getJSONObject(i).getString("id");
int count = i + 1;
style = count + ". " + style;
//create object
StyleInfo tempTaste = new StyleInfo(style, rate, beerID);
//add to arraylist
tasteList.add(tempTaste);
//add items to listview
StyleInfoAdapter adapter1 = new StyleInfoAdapter(c ,R.layout.brewer_stats_listview, tasteList);
lv.setAdapter(adapter1);
//set up clicks
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
StyleInfo o=(StyleInfo)arg0.getItemAtPosition(arg2);
String bID = o.id;
//todo: add onclick for fragment to load
FragmentManager man= (Activity)c.getFragmentManager();
FragmentTransaction tran = man.beginTransaction();
Fragment_one = new StylePage2();
final Bundle bundle = new Bundle();
bundle.putString("beerIDSent", bID);
Fragment_one.setArguments(bundle);
tran.replace(R.id.main, Fragment_one);//tran.
tran.addToBackStack(null);
tran.commit();
}
});
}
}
catch(Exception e){
}
Dialog.dismiss();
}
public String readJSONFeed(String URL) {
StringBuilder stringBuilder = new StringBuilder();
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(URL);
try {
HttpResponse response = httpClient.execute(httpGet);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) {
HttpEntity entity = response.getEntity();
InputStream inputStream = entity.getContent();
BufferedReader reader = new BufferedReader(
new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
stringBuilder.append(line);
}
inputStream.close();
} else {
Log.d("JSON", "Failed to download file");
}
} catch (Exception e) {
Log.d("readJSONFeed", e.getLocalizedMessage());
}
return stringBuilder.toString();
}
}
can not resolve method FragmentManager() is the error I am receiving

Hi,
To be able to call getFragmentManager() or getSupportFragmentManager() you'll need to use FragmentActivity, so what I would do is:
1. Make sure the activity that calls the asycTask is a FragmentActivity.
2. Pass this actvity to the asycTask.
Something like: (asyncTask method)
setActivity(Activity activity)
{
fm = activity.getFragmentManager();
}

mrsegev said:
Hi,
To be able to call getFragmentManager() or getSupportFragmentManager() you'll need to use FragmentActivity, so what I would do is:
1. Make sure the activity that calls the asycTask is a FragmentActivity.
2. Pass this actvity to the asycTask.
Something like: (asyncTask method)
setActivity(Activity activity)
{
fm = activity.getFragmentManager();
}
Click to expand...
Click to collapse
thats the problem, I launch the asyncTask from a fragment....

Oh! So you'll access your activity like this:
getActivity().getFragmentManager();

FC when using interface to launch new fragment form listView

I have an async task that loads a list view of items. I am currently trying to set the onClick to load a new fragment with an "id" that is being retrieved from the list item that is clicked. I have no errors in my code that the Android Studio shows me.
When I run the app and click on the item in the list view I get this FC:
02-13 19:49:56.813 20334-20334/com.beerportfolio.beerportfoliopro E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NullPointerException
at com.beerportfolio.beerportfoliopro.ReadJSONResult$1.onItemClick(ReadJSONResult.java:140)
at android.widget.AdapterView.performItemClick(AdapterView.java:298)
at android.widget.AbsListView.performItemClick(AbsListView.java:1237)
at android.widget.ListView.performItemClick(ListView.java:4555)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:3037)
at android.widget.AbsListView$1.run(AbsListView.java:3724)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:5789)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:843)
at dalvik.system.NativeStart.main(Native Method)
02-13 19:50:42.112 20864-20870/? E/jdwp﹕ Failed sending reply to debugger: Broken pipe
line 140 in ReadJSONResult is:
listenerBeer.onArticleSelected(idToSend);
That line is part of this whole onClick:
//set up clicks
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
BeerData beerInfo = beerList.get(arg2);
String idToSend = beerInfo.beerId;
//todo: launch beer fragment
listenerBeer.onArticleSelected(idToSend);
}
});
All the code for ReadJSONResult is:
public class ReadJSONResult extends AsyncTask<String, Void, String> {
Context c;
private ProgressDialog Dialog;
public ReadJSONResult(Context context)
{
c = context;
Dialog = new ProgressDialog(c);
}
//code for on click
OnArticleSelectedListener listenerBeer;
public interface OnArticleSelectedListener{
public void onArticleSelected(String myString);
}
public void setOnArticleSelectedListener(OnArticleSelectedListener listener){
this.listenerBeer = listener;
}
//end code for onClick
@override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
return readJSONFeed(arg0[0]);
}
protected void onPreExecute() {
Dialog.setMessage("Searching Beer Cellar");
Dialog.setTitle("Loading");
Dialog.setCancelable(false);
Dialog.show();
}
protected void onPostExecute(String result){
//decode json here
try{
JSONObject json = new JSONObject(result);
//acces listview
ListView lv = (ListView) ((Activity) c).findViewById(android.R.id.list);
//make array list for beer
final List<BeerData> beerList = new ArrayList<BeerData>();
//get json items
for(int i = 0; i < json.getJSONArray("data").length(); i++) {
String beerId = GetBeerDataFromJSON(i,"id", json);
String beerName = GetBeerDataFromJSON(i,"name", json);
String beerDescription = GetBeerDataFromJSON(i,"description" , json);
String beerAbv = GetBeerDataFromJSON(i,"abv" , json);
String beerIbu = GetBeerDataFromJSON(i,"ibu" , json);
String beerIcon = GetBeerIconsFromJSON(i, "icon",json );
String beerMediumIcon = GetBeerIconsFromJSON(i, "medium",json );
String beerLargeIcon = GetBeerIconsFromJSON(i, "large",json );
String beerGlass = GetBeerGlassFromJSON(i, json );
String beerStyle = GetBeerStyleFromJSON(i,"name", json );
String beerStyleDescription = GetBeerStyleFromJSON(i,"description", json );
String beerBreweryId = GetBeerBreweryInfoFromJSON(i, "id", json );
String beerBreweryName = GetBeerBreweryInfoFromJSON(i, "name", json );
String beerBreweryDescription = GetBeerBreweryInfoFromJSON(i, "description", json );
String beerBreweryWebsite = GetBeerBreweryInfoFromJSON(i, "website", json );
//get long and latt
String beerBreweryLat = GetBeerBreweryLocationJSON(i, "longitude", json );
String beerBreweryLong = GetBeerBreweryLocationJSON(i, "latitude", json );
String beerBreweryYear = GetBeerBreweryInfoFromJSON(i, "established", json );
String beerBreweryIcon = GetBeerBreweryIconsFromJSON(i,"large",json);
//create beer object
BeerData thisBeer = new BeerData(beerName, beerId, beerDescription, beerAbv, beerIbu, beerIcon,
beerMediumIcon,beerLargeIcon, beerGlass, beerStyle, beerStyleDescription, beerBreweryId, beerBreweryName,
beerBreweryDescription, beerBreweryYear, beerBreweryWebsite,beerBreweryIcon, beerBreweryLat, beerBreweryLong);
//add beer to list
beerList.add(thisBeer);
}
//update listview
BeerSearchAdapter adapter1 = new BeerSearchAdapter(c ,R.layout.listview_item_row, beerList);
lv.setAdapter(adapter1);
//set up clicks
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
BeerData beerInfo = beerList.get(arg2);
String idToSend = beerInfo.beerId;
//todo: launch beer fragment
listenerBeer.onArticleSelected(idToSend);
}
});
}
catch(Exception e){
}
Dialog.dismiss();
}
//todo: all the get functions go here
private String GetBeerDataFromJSON(int position, String whatToGet, JSONObject json ) {
String whatIsTheKeyYouAreLookFor = whatToGet;
int whereInTheJSONArrayForLoopIsTheData = position;
String holder = "";
try{
holder = json.getJSONArray("data").getJSONObject(whereInTheJSONArrayForLoopIsTheData).getString(whatIsTheKeyYouAreLookFor);
} catch (JSONException e) {
holder = "N/A";
}
return holder;
}
//get icons
private String GetBeerBreweryIconsFromJSON(int position, String whatToGet, JSONObject json ) {
String whatIsTheKeyYouAreLookFor = whatToGet;
int whereInTheJSONArrayForLoopIsTheData = position;
String holder = "";
try{
holder = json.getJSONArray("data").getJSONObject(whereInTheJSONArrayForLoopIsTheData).getJSONArray("breweries").getJSONObject(0).getJSONObject("images").getString(whatIsTheKeyYouAreLookFor);;
} catch (JSONException e) {
holder = "N/A";
}
return holder;
}
//get icons
private String GetBeerIconsFromJSON(int position, String whatToGet, JSONObject json ) {
String whatIsTheKeyYouAreLookFor = whatToGet;
int whereInTheJSONArrayForLoopIsTheData = position;
String holder = "";
try{
holder = json.getJSONArray("data").getJSONObject(whereInTheJSONArrayForLoopIsTheData).getJSONObject("labels").getString(whatIsTheKeyYouAreLookFor);
} catch (JSONException e) {
holder = "N/A";
}
return holder;
}
//get style information
private String GetBeerStyleFromJSON(int position, String whatToGet, JSONObject json ) {
String whatIsTheKeyYouAreLookFor = whatToGet;
int whereInTheJSONArrayForLoopIsTheData = position;
String holder = "";
try{
holder = json.getJSONArray("data").getJSONObject(whereInTheJSONArrayForLoopIsTheData).getJSONObject("style").getString(whatIsTheKeyYouAreLookFor);
} catch (JSONException e) {
holder = "N/A";
}
return holder;
}
//get location data
private String GetBeerBreweryLocationJSON(int position, String whatToGet, JSONObject json ) {
String whatIsTheKeyYouAreLookFor = whatToGet;
int whereInTheJSONArrayForLoopIsTheData = position;
String holder = "";
try{
holder = json.getJSONArray("data").getJSONObject(whereInTheJSONArrayForLoopIsTheData).getJSONArray("breweries").getJSONObject(0).getJSONArray("locations").getJSONObject(0).getString(whatIsTheKeyYouAreLookFor);
} catch (JSONException e) {
holder = "N/A";
}
return holder;
}
//get brewery information
//get style information
private String GetBeerBreweryInfoFromJSON(int position, String whatToGet, JSONObject json ) {
String whatIsTheKeyYouAreLookFor = whatToGet;
int whereInTheJSONArrayForLoopIsTheData = position;
String holder = "";
try{
holder = json.getJSONArray("data").getJSONObject(whereInTheJSONArrayForLoopIsTheData).getJSONArray("breweries").getJSONObject(0).getString(whatIsTheKeyYouAreLookFor);
} catch (JSONException e) {
holder = "N/A";
}
return holder;
}
//get glass
private String GetBeerGlassFromJSON(int position, JSONObject json ) {
int whereInTheJSONArrayForLoopIsTheData = position;
String holder = "";
try{
holder = json.getJSONArray("data").getJSONObject(whereInTheJSONArrayForLoopIsTheData).getJSONObject("glass").getString("name");
} catch (JSONException e) {
holder = "N/A";
}
return holder;
}
public String readJSONFeed(String URL) {
StringBuilder stringBuilder = new StringBuilder();
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(URL);
try {
HttpResponse response = httpClient.execute(httpGet);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) {
HttpEntity entity = response.getEntity();
InputStream inputStream = entity.getContent();
BufferedReader reader = new BufferedReader(
new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
stringBuilder.append(line);
}
inputStream.close();
} else {
Log.d("JSON", "Failed to download file");
}
} catch (Exception e) {
Log.d("readJSONFeed", e.getLocalizedMessage());
}
return stringBuilder.toString();
}
}
BeerSearchAdapter is:
public class BeerSearchAdapter extends ArrayAdapter<BeerData> {
Context context;
int layoutResourceId;
List<BeerData> data = null;
public BeerSearchAdapter(Context context, int layoutResourceId, List<BeerData> data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
beerHolder holder = null;
if(row == null)
{
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new beerHolder();
holder.txtBrewery = (TextView)row.findViewById(R.id.beerBreweryNameList);
holder.txtTitle = (TextView)row.findViewById(R.id.beerNameList);
row.setTag(holder);
}
else
{
holder = (beerHolder)row.getTag();
}
BeerData beer = data.get(position);
holder.txtTitle.setText(beer.beerName);
holder.txtBrewery.setText(beer.beerBreweryName);
return row;
}
static class beerHolder
{
TextView txtBrewery;
TextView txtTitle;
}
}
My Search.java where the interface comes form is here:
public class Search extends Fragment implements SearchView.OnQueryTextListener, ReadJSONResult.OnArticleSelectedListener {
private ListView lv;
View v;
@override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//set layout here
v = inflater.inflate(R.layout.activity_search, container, false);
setHasOptionsMenu(true);
getActivity().setTitle("Search");
//get user information
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
String userName = prefs.getString("userName", null);
String userID = prefs.getString("userID", null);
//todo: code body goes here
// Inflate the layout for this fragment
return v;
}
@override
public void onCreateOptionsMenu (Menu menu, MenuInflater inflater) {
// Inflate the menu; this adds items to the action bar if it is present.
super.onCreateOptionsMenu(menu, inflater);
Log.d("click", "inside the on create");
//inflater.inflate(R.menu.main, menu);
SearchView searchView = (SearchView) menu.findItem(R.id.menu_search2).getActionView();
searchView.setIconified(false);
searchView.setOnQueryTextListener(this);
}
public boolean onQueryTextSubmit (String query) {
//toast query
//make json variables to fill
// url to make request
String url = "myURL";
try {
query = URLEncoder.encode(query, "UTF-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String jsonUrl = url + query;
//todo: get json
new ReadJSONResult(getActivity()).execute(jsonUrl);
return false;
}
@override
public boolean onQueryTextChange(String newText) {
// TODO Auto-generated method stub
return false;
}
@override
public void onArticleSelected(String b){
//code to execute on click
Fragment Fragment_one;
FragmentManager man= getFragmentManager();
FragmentTransaction tran = man.beginTransaction();
//todo: set to beer fragment
Fragment_one = new StylePage2();
final Bundle bundle = new Bundle();
bundle.putString("beerIDSent", b);
Fragment_one.setArguments(bundle);
tran.replace(R.id.main, Fragment_one);//tran.
tran.addToBackStack(null);
tran.commit();
}
}
Let me know if you need any other code, I am stomped on this and could use a second pair of eyes. Thanks.

SharedPreferences Context Issue

I have created a questionnaire in the beginning of the app in order to base a user model off the answers chosen. The values of the chosen options are stored as Shared Preferences as shown below. With the data retrieved I am then trying to tag a Google map with certain tags based on the answers chosen. The issue I am encountering is that of reading the stored Shared Preference values across the different activities, from the Question2 Activity, to that of the Map Activity (code below). Any pointers on how to solve the *context* conflict would be greatly appreciated.
Question2 Activity:
Code:
public class Question2 extends Activity{
RadioButton q2a1,q2a2,q2a3;
Button btn2;
public static final String MY_PREF = "MyPreferences";
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View v = inflater.inflate(R.layout.activity_question2, null);
return v;
}
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_question2);
q2a1 = (RadioButton) findViewById(R.id.q2a1);
q2a2 = (RadioButton) findViewById(R.id.q2a2);
q2a3 = (RadioButton) findViewById(R.id.q2a3);
btn2 = (Button) findViewById(R.id.q2_button);
btn2.setOnClickListener(new OnClickListener(){
public void onClick(View v){
SharedPreferences prefernces = getSharedPreferences(MY_PREF, 0);
SharedPreferences.Editor editor = prefernces.edit();
if (q2a1.isChecked()){
editor.putInt("answer_value2", 1);
editor.commit();
}
if (q2a2.isChecked()){
editor.putInt("answer_value2", 2);
editor.commit();
}
if (q2a3.isChecked()){
editor.putInt("answer_value2", 3);
editor.commit();
}else {
editor.putInt("answer_value2", 0);
editor.commit();
}
editor.commit();
Intent intent = new Intent(getApplicationContext(), Question3.class);
startActivity(intent);
}
});
}
}
Map Activity:
Code:
public class MapActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_map);
map = ((MapFragment) getFragmentManager().findFragmentById(R.id.mapLayout)).getMap();
map.setMyLocationEnabled(true);
SharedPreferences preferences = getSharedPreferences(Question2.MY_PREF,MODE_PRIVATE);
int q1answer = preferences.getInt("answer_value", 0);
int q2answer = preferences.getInt("answer_value2", 0);
int q3answer = preferences.getInt("answer_value3", 0);
if(q1answer == 1){
//method
}
if(q1answer == 2){
//method
}
if(q1answer == 3){
//method
}
if(q2answer == 1){
map.addMarker(new MarkerOptions().position(FOOD_FOOD).title("Food & Food").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(HEALTHSHOP).title("Health Shop").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(GRASSYHOPPER).title("Grasy Hopper").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(M_S).title("M&S").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(MINT).title("Mint").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
}if(q2answer == 2){
Toast.makeText(getApplicationContext(), "Your result is " + q2answer, Toast.LENGTH_SHORT).show();
map.addMarker(new MarkerOptions().position(FOOD_FOOD).title("Food & Food").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(SUBWAY).title("Subway").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(NEWYORKSBEST).title("New York's Best").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(MCD).title("Mc Donald's").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(M_S).title("M&S").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(JUBILEE).title("Jubilee").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(GRASSYHOPPER).title("Grassy Hopper").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
}if(q2answer == 3){
map.addMarker(new MarkerOptions().position(NEWYORKSBEST).title("New York's Best").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(SUBWAY).title("Subway").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(PASTIZZERIA).title("Pastizerria").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(MCD).title("Mc Donald's").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
map.addMarker(new MarkerOptions().position(BURGERKING).title("Burger King").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
}
if(q3answer == 1){
//implementation
}if(q3answer == 2){
//implementation
}if(q3answer == 3){
//implementation
}if(q3answer == 4){
//implementation
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.map, menu);
return true;
}

Use this
create this class in your package
Code:
public class SharedPrefence{
// Shared Preferences
SharedPreferences pref;
// Editor for Shared preferences
Editor editor;
// Context
Context _context;
// Shared pref mode
int PRIVATE_MODE = 0;
// Sharedpref file name
private static final String PREF_NAME = "MyPreferences";
// Answers (make variable public to access from outside)
public static final String KEY_ANSWER_TWO = "answer_value2";
//similarly other answers tag can be added(this is the key of preference)
// Constructor
public SharedPrefence(Context context) {
_context = context;
pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
editor = pref.edit();
}
/**
* Create Answer.
* */
public void createAnswer(int ans) {
// Storing name in pref
editor.putInt(KEY_ANSWER_TWO, ans);
// commit changes
editor.commit();
}
public int getAnswer(String tag,int default) {
return pref.getString(tag, default);
}
}
now create an activity and initialise this class in the starting with the activity context.
next call the create answer method of this class and you are done.
also no need to create sharedprefence in each activity.
and it's even better if you create only one activity and use ViewPager for all questions.you can google for it.
And if this was useful click on thanks below.
:victory::victory::victory::victory:

How do I implement a onscroll Listener to my listview?

I have a large data to load from JSON.
I have implemented a custom list view by following a tutorial, now since the data is huge I want it load as the user scrolls.
This is my LoadRestaurant class code which is inside the main activity.
Code:
class LoadRestaurants extends AsyncTask<String, String, String> {
//Show Progress Dialog
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(SearchAll.this);
pDialog.setMessage("Loading All Restaurants...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected String doInBackground(String... arg) {
//building parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
//Getting JSON from URL
String json = jsonParser.makeHttpRequest(URL_RESTAURANT_LIST, "GET", params);
//Log Cat Response Check
Log.d("Areas JSON: ", "> " + json);
try {
restaurants = new JSONArray(json);
if (restaurants != null) {
//loop through all restaurants
for (int i = 0; i < restaurants.length(); i++) {
JSONObject c = restaurants.getJSONObject(i);
//Storing each json object in the variable.
String id = c.getString(TAG_ID);
String name = c.getString(TAG_NAME);
String location = c.getString(TAG_LOCATION);
String rating = c.getString(TAG_RATING);
//Creating New Hashmap
HashMap<String, String> map = new HashMap<String, String>();
//adding each child node to Hashmap key
map.put(TAG_ID, id);
map.put(TAG_NAME, name);
map.put(TAG_LOCATION, location);
map.put(TAG_RATING, rating);
//adding HashList to ArrayList
restaurant_list.add(map);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
//dismiss the dialog
pDialog.dismiss();
//Updating UI from the Background Thread
runOnUiThread(new Runnable() {
@Override
public void run() {
ListAdapter adapter = new SimpleAdapter(
SearchAll.this, restaurant_list,
R.layout.listview_restaurants, new String[]{
TAG_ID, TAG_NAME, TAG_LOCATION, TAG_RATING}, new int[]{
R.id.login_id, R.id.restaurant_name, R.id.address, R.id.rating});
setListAdapter(adapter);
ListView lv = getListView();
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// Bundle bundle = new Bundle();
Intent intent = new Intent(SearchAll.this, RestaurantProfile.class);
String loginId = ((TextView) view.findViewById(R.id.login_id)).getText().toString();
intent.putExtra("login_id", loginId);
startActivity(intent);
}
});
}
});
}
}
}
I want to load around 20 restaurants and then it auto loads another 20 as soon as user reaches the end of first 20.
There are lots of tutorials online but its confusing to implement.
Please help me out!

The custom ListView, support for automatic loading you can try https://github.com/chrisbanes/Android-PullToRefresh