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.
i have made a fragment which contains view pager.it uses list of fragments so that fragments can be added or removed dynamically.
each child fragment of viewpager is a listfragment and loads list using asynctask
now my problem is when i have 3-4 child fragments in view pager,after switching to other pages(tabs),the earlier ones in which list is already loaded are reset automatically when i swipe back to them.so i want that they must be added to backstact so that they can be resumed.
Code:
public class TabFragment extends android.support.v4.app.Fragment {
List fragments = new ArrayList();
public PagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
String home;
ActionBar actionBar;
[user=439709]@override[/user]
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.tabfragment,
container, false);
mSectionsPagerAdapter = new ScreenSlidePagerAdapter(getChildFragmentManager());
mViewPager = (ViewPager) rootView.findViewById(R.id.pager);
actionBar = getActivity().getActionBar();
mViewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
public void onPageScrolled(int p1, float p2, int p3) {
// TODO: Implement this method
}
public void onPageSelected(int p1) { // TODO: Implement this// method
Main ma = ((Main) fragments.get(p1));
if (ma.current != null) {
ma.bbar(ma.current);
}
}
public void onPageScrollStateChanged(int p1) {
// TODO: Implement this method
}
});
mViewPager.setAdapter(mSectionsPagerAdapter);
return rootView;
}
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
[user=439709]@override[/user]
public CharSequence getPageTitle(int position) {
//Toast.makeText(getActivity(),""+position,Toast.LENGTH_SHORT).show();
Main ma = ((Main) fragments.get(position));
return new File(ma.current).getName();
}
public int getCount() {
// TODO: Implement this method
return fragments.size();
}
public ScreenSlidePagerAdapter(android.support.v4.app.FragmentManager fm) {
super(fm);
}
[user=439709]@override[/user]
public android.support.v4.app.Fragment getItem(int position) {
android.support.v4.app.Fragment f;
f = fragments.get(position);
return f;
}
}
public void removePage(int position) {
if(position==0){Toast.makeText(getActivity(),"Main Screen Cant be removed",Toast.LENGTH_LONG).show();}else{
fragments.remove(position);
mSectionsPagerAdapter.notifyDataSetChanged();
mViewPager.setCurrentItem(position-1);
}
}
public void add(String text) {
android.support.v4.app.Fragment main = new Main();
Bundle b = new Bundle();
int p = fragments.size();
b.putString("path", text);
b.putInt("pos", p);
main.setArguments(b);
fragments.add(main);
mSectionsPagerAdapter.notifyDataSetChanged();
mViewPager.setCurrentItem(p);
}
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
Good day. I start learn Fragment and I want use GPS in my Application. and I use Fragment. in fragment who view coordinate i writed next code
Code:
public class MyFragment2 extends Fragment {
public static final String BUTTON_INDEX = "button_index";
private static final int BUTTON_INDEX_DEFAULT = -1;
static TextView txt;
static TextView txt2;
String[] mCatDescription;
public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle saveInstanceState){
View viewHier = inflater.inflate(R.layout.fragment2, container, false);
txt = (TextView)viewHier.findViewById(R.id.textView1);
txt2 = (TextView)viewHier.findViewById(R.id.textView2);
mCatDescription =getResources().getStringArray(R.array.cats);
Bundle args = getArguments();
int buttonIndex = args != null ? args.getInt(BUTTON_INDEX, BUTTON_INDEX_DEFAULT):BUTTON_INDEX_DEFAULT;
if(buttonIndex != BUTTON_INDEX_DEFAULT){
setDiscription(buttonIndex);
}
return viewHier;
}
public void setDiscription(int buttonIndex){
GPSWork gpsWork = new GPSWork();
switch(buttonIndex){
case 1:
txt2.setText("one");
break;
case 2:
gpsWork.GetCoordinates();
break;
case 3:
txt2.setText("therd");
break;
}
}
}
Ok. when we click on button 2 we call method GetCoordinates(). this class have next code
Code:
public class GPSWork{
LocationManager locationManager;
public GPSWork(){
locationManager = (LocationManager)MainActivity.mContext.getSystemService(Context.LOCATION_SERVICE);
}
public void GetCoordinates(){
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
5000, 5, locationListener);
}
private LocationListener locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
MyFragment2.txt2.setText("OK");
}
@Override
public void onProviderDisabled(String provider) {
MyFragment2.txt2.setText("OK");
}
@Override
public void onProviderEnabled(String provider) {
MyFragment2.txt2.setText("OK");
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
MyFragment2.txt2.setText("OK");
}
};
}
how we see, we should get text OK on TextView on MainActivity. but we don't have text, whats wrong? and if I change code in method GetCoordinates() on
Code:
public void GetCoordinates(){
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
1000, 10, locationListener);
}
all work fine, i see text in TextView (OK )
I am trying to start a new certain Activity based on which page I am clicking on in a Gridview.
I tried to understand the Sample GridViewPager which is coming along with the sdk and trying to adapt the given explanation on stackoverflow (question # 26343337). But I really don't know how to bring these two things together and even where to start.
The first java.file Selection
Code:
public class Selection extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.selection_grid);
final GridViewPager pager = (GridViewPager) findViewById(R.id.pager);
pager.setAdapter(new Workers(this, getFragmentManager()));
DotsPageIndicator dotsPageIndicator = (DotsPageIndicator) findViewById(R.id.page_indicator);
dotsPageIndicator.setPager(pager);
}
}
and the second java.file Users (thats the Adapter):
Code:
public class Users extends FragmentGridPagerAdapter {
private static final int TRANSITION_DURATION_MILLIS = 100;
private final Context mContext;
private List<Row> mRows;
private ColorDrawable mDefaultBg;
private ColorDrawable mClearBg;
public Users (Context ctx, FragmentManager fm) {
super(fm);
mContext = ctx;
mRows = new ArrayList<Workers.Row>();
mRows.add(new Row(cardFragment(R.string.title, R.string.user1)));
mRows.add(new Row(cardFragment(R.string.title, R.string.user2)));
mRows.add(new Row(cardFragment(R.string.title, R.string.user3)));
mRows.add(new Row(cardFragment(R.string.title, R.string.user4)));
// In case in one row several cardFragments are needed
// mRows.add(new Row(
// cardFragment(R.string.cards_title, R.string.cards_text),
// cardFragment(R.string.expansion_title, R.string.expansion_text)));
mDefaultBg = new ColorDrawable(R.color.dark_grey);
mClearBg = new ColorDrawable(android.R.color.transparent);
}
LruCache<Integer, Drawable> mRowBackgrounds = new LruCache<Integer, Drawable>(3) {
@Override
protected Drawable create(final Integer row) {
int resid = BG_IMAGES[row % BG_IMAGES.length];
new DrawableLoadingTask(mContext) {
@Override
protected void onPostExecute(Drawable result) {
TransitionDrawable background = new TransitionDrawable(new Drawable[] {
mDefaultBg,
result
});
mRowBackgrounds.put(row, background);
notifyRowBackgroundChanged(row);
background.startTransition(TRANSITION_DURATION_MILLIS);
}
}.execute(resid);
return mDefaultBg;
}
};
private Fragment cardFragment(int titleRes, int textRes) {
Resources res = mContext.getResources();
CardFragment fragment =
CardFragment.create(res.getText(titleRes), res.getText(textRes));
// Add some extra bottom margin to leave room for the page indicator
fragment.setCardMarginBottom(
res.getDimensionPixelSize(R.dimen.card_margin_bottom));
return fragment;
}
static final int[] BG_IMAGES = new int[] {
R.drawable.user1,
R.drawable.user2,
R.drawable.user3,
R.drawable.user4
};
/** A convenient container for a row of fragments. */
private class Row {
final List<Fragment> columns = new ArrayList<Fragment>();
public Row(Fragment... fragments) {
for (Fragment f : fragments) {
add(f);
}
}
public void add(Fragment f) {
columns.add(f);
}
Fragment getColumn(int i) {
return columns.get(i);
}
public int getColumnCount() {
return columns.size();
}
}
@Override
public Fragment getFragment(int row, int col) {
Row adapterRow = mRows.get(row);
return adapterRow.getColumn(col);
}
@Override
public Drawable getBackgroundForRow(final int row) {
return mRowBackgrounds.get(row);
}
@Override
public int getRowCount() {
return mRows.size();
}
@Override
public int getColumnCount(int rowNum) {
return mRows.get(rowNum).getColumnCount();
}
class DrawableLoadingTask extends AsyncTask<Integer, Void, Drawable> {
private static final String TAG = "Loader";
private Context context;
DrawableLoadingTask(Context context) {
this.context = context;
}
@Override
protected Drawable doInBackground(Integer... params) {
Log.d(TAG, "Loading asset 0x" + Integer.toHexString(params[0]));
return context.getResources().getDrawable(params[0]);
}
}
}