when load app should display 20 movie poster in 2 column 10 row gridview. reason when keep scrolling keep loading same 20 posters, pretty infinite scrolling. still new android development great!
movieadapter
public class movieadapter extends cursoradapter { private final string log_tag = movieadapter.class.getsimplename(); public movieadapter(context context, cursor c, int flags){ super(context,c,flags); } private string convertcursorrowtouxformat(cursor cursor){ string poster = cursor.getstring(mainactivityfragment.col_movie_url); return poster; } @override public view newview(context context,cursor cursor,viewgroup parent){ view view = layoutinflater.from(context).inflate(r.layout.poster_image, parent, false); return view; } @override public void bindview(view view, context context, cursor cursor) { final string posterimage_base_url = "http://image.tmdb.org/t/p/"; final string posterimage_size = "w500"; imageview posterimage = (imageview)view; final string posterimage_url = posterimage_base_url + posterimage_size + convertcursorrowtouxformat(cursor); picasso.with(context).load(posterimage_url).into(posterimage); log.v(log_tag, "poster urls: " + posterimage_url); } } mainactivityfragment
public class mainactivityfragment extends fragment implements loadermanager.loadercallbacks<cursor>{ private static final int movie_loader = 0; private final string log_tag = mainactivityfragment.class.getsimplename(); private static final string[] movie_columns = { // moviecontract.movieentry.table_name + "." + moviecontract.movieentry._id, moviecontract.movieentry.column_movie_poster }; static final int col_movie_id = 0; static final int col_movie_url = 1; private movieadapter mmovieadapter; public mainactivityfragment() { } @override public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) { mmovieadapter = new movieadapter(getactivity(),null,0); final view rootview = inflater.inflate(r.layout.fragment_main, container, false); gridview gridview = (gridview) rootview.findviewbyid(r.id.movieposter_image_gridview); gridview.setadapter(mmovieadapter); gridview.setonitemclicklistener(new adapterview.onitemclicklistener(){ @override public void onitemclick(adapterview<?> adapterview, view view, int position, long l){ cursor cursor = (cursor)adapterview.getitematposition(position); if(cursor != null) { intent intent = new intent(getactivity(), detailactivity.class) .setdata(moviecontract.movieentry.content_uri); startactivity(intent); log.d("debug", "selected item position " + position + ", id: " + l); } } }); return rootview; } @override public void onactivitycreated(bundle savedinstancestate){ getloadermanager().initloader(movie_loader, null, this); super.onactivitycreated(savedinstancestate); } private void updateapplication() { fetchmovietask movietask = new fetchmovietask(getactivity()); sharedpreferences prefs = preferencemanager.getdefaultsharedpreferences(getactivity()); string sortby = prefs.getstring(getstring(r.string.pref_sort_by_key), getstring(r.string.pref_popular_default)); movietask.execute(sortby); } @override public void onstart() { super.onstart(); updateapplication(); } @override public loader<cursor> oncreateloader(int i, bundle bundle){ uri movieuri = moviecontract.movieentry.content_uri; return new cursorloader(getactivity(), movieuri, movie_columns, null, null, null); } @override public void onloadfinished(loader<cursor> cursorloader, cursor cursor){ mmovieadapter.swapcursor(cursor); } @override public void onloaderreset(loader<cursor> cursorloader){ mmovieadapter.swapcursor(null); } } fetchmovietask
public class fetchmovietask extends asynctask<string, void, void> { private final string log_tag = fetchmovietask.class.getsimplename(); private final context mcontext; public fetchmovietask(context context) { mcontext = context; } private boolean debug = true; private void getmoviedatajson(string moviejsonstr, int result) throws jsonexception { final string mdb_result = "results"; final string mdb_poster = "poster_path"; final string mdb_movie_title = "original_title"; final string mdb_movie_plot = "overview"; final string mdb_movie_rating = "popularity"; final string mdb_release_date = "release_date"; try { jsonobject moviejson = new jsonobject(moviejsonstr); jsonarray moviearray = moviejson.getjsonarray(mdb_result); vector<contentvalues> cvvector = new vector<>(moviearray.length()); (int = 0; < moviearray.length(); i++) { string poster; string title; string plot; string rating; string releasedate; //get thejson object representing movie jsonobject moviedetail = moviearray.getjsonobject(i); poster = moviedetail.getstring(mdb_poster); title = moviedetail.getstring(mdb_movie_title); plot = moviedetail.getstring(mdb_movie_plot); rating = moviedetail.getstring(mdb_movie_rating); releasedate = moviedetail.getstring(mdb_release_date); contentvalues moviedetailvalues = new contentvalues(); moviedetailvalues.put(moviecontract.movieentry.column_movie_name, title); moviedetailvalues.put(moviecontract.movieentry.column_movie_poster, poster); moviedetailvalues.put(moviecontract.movieentry.column_movie_plot, plot); moviedetailvalues.put(moviecontract.movieentry.column_movie_rating, rating); moviedetailvalues.put(moviecontract.movieentry.column_movie_redate, releasedate); cvvector.add(moviedetailvalues); } int inserted = 0; if (cvvector.size() > 0) { contentvalues[] cvarray = new contentvalues[cvvector.size()]; cvvector.toarray(cvarray); inserted = mcontext.getcontentresolver().bulkinsert(moviecontract.movieentry.content_uri, cvarray); } log.d(log_tag, "fetchmovietask complete. " + inserted + " inserted"); } catch (jsonexception e) { log.e(log_tag, e.getmessage(), e); e.printstacktrace(); } } @override protected void doinbackground (string...params){ if (params.length == 0) { return null; } httpurlconnection urlconnection = null; bufferedreader reader = null; string moviejsonstr = null; int result = 20; try { final string movie_base_url = "http://api.themoviedb.org/3/movie"; uri builturi = uri.parse(movie_base_url).buildupon() .appendpath(params[0]) .appendqueryparameter("api_key", buildconfig.movie_api_key) .build(); url url = new url(builturi.tostring()); log.v(log_tag, "built uri " + builturi.tostring()); urlconnection = (httpurlconnection) url.openconnection(); urlconnection.setrequestmethod("get"); urlconnection.connect(); inputstream inputstream = urlconnection.getinputstream(); stringbuffer buffer = new stringbuffer(); if (inputstream == null) { return null; } reader = new bufferedreader(new inputstreamreader(inputstream)); string line; while ((line = reader.readline()) != null) { buffer.append(line + "\n"); } if (buffer.length() == 0) { return null; } moviejsonstr = buffer.tostring(); getmoviedatajson(moviejsonstr, result); } catch (ioexception e) { log.e(log_tag, "error ", e); } catch(jsonexception e){ log.e(log_tag, e.getmessage(), e); e.printstacktrace(); } { if (urlconnection != null) { urlconnection.disconnect(); } if (reader != null) { try { reader.close(); } catch (final ioexception e) { log.e(log_tag, "error closing stream", e); } } } return null; } } movieprovider
public class movieprovider extends contentprovider { // uri matcher used content provider. private static final urimatcher surimatcher = buildurimatcher(); private moviedbhelper mopenhelper; static final int movie = 100; static urimatcher buildurimatcher(){ final urimatcher matcher = new urimatcher(urimatcher.no_match); final string authority = moviecontract.content_authority; matcher.adduri(authority,moviecontract.path_movie, movie); return matcher; } @override public boolean oncreate(){ mopenhelper = new moviedbhelper(getcontext()); return true; } @override public string gettype(uri uri){ final int match = surimatcher.match(uri); switch (match){ case movie: return moviecontract.movieentry.content_type; default: throw new unsupportedoperationexception(("unknown uri:" + uri)); } } @override public cursor query(uri uri, string[] projection, string selection, string[] selectionargs, string sortorder) { cursor retcursor; switch (surimatcher.match(uri)){ case movie: { retcursor = mopenhelper.getreadabledatabase().query( moviecontract.movieentry.table_name, projection, selection, selectionargs, null, null, null ); break; } default: throw new unsupportedoperationexception("unknown uri: " + uri); } retcursor.setnotificationuri(getcontext().getcontentresolver(),uri); return retcursor; } @override public uri insert(uri uri, contentvalues values) { final sqlitedatabase db = mopenhelper.getwritabledatabase(); final int match = surimatcher.match(uri); uri returnuri; switch (match) { case movie: { long _id = db.insert(moviecontract.movieentry.table_name,null,values); if(_id > 0) // returnuri = moviecontract.movieentry.buildmovieuri(_id); returnuri = moviecontract.movieentry.content_uri; else throw new android.database.sqlexception("failed insert row " + uri); break;} default: throw new unsupportedoperationexception("unknown uri: " + uri); } getcontext().getcontentresolver().notifychange(uri,null); db.close(); return returnuri; } @override public int delete(uri uri, string selection, string[] selectionargs) { final sqlitedatabase db = mopenhelper.getwritabledatabase(); final int match = surimatcher.match(uri); int rowsdeleted; if (null == selection) selection = "1"; switch (match){ case movie: rowsdeleted = db.delete(moviecontract.movieentry.table_name,selection,selectionargs); break; default: throw new unsupportedoperationexception("unknown uri: " + uri); } if (rowsdeleted != 0) { getcontext().getcontentresolver().notifychange(uri,null); } return rowsdeleted; } @override public int update( uri uri, contentvalues values, string selection, string[] selectionargs) { final sqlitedatabase db = mopenhelper.getwritabledatabase(); final int match = surimatcher.match(uri); int rowsupdated; switch (match){ case movie: rowsupdated= db.update(moviecontract.movieentry.table_name,values,selection,selectionargs); break; default: throw new unsupportedoperationexception("unknown uri: " + uri); } if (rowsupdated != 0) { getcontext().getcontentresolver().notifychange(uri,null); } return rowsupdated; } @override public int bulkinsert(uri uri,contentvalues[] values) { final sqlitedatabase db = mopenhelper.getwritabledatabase(); final int match = surimatcher.match(uri); switch (match) { case movie: db.begintransaction(); int returncount = 0; try { (contentvalues value : values) { long _id = db.insert(moviecontract.movieentry.table_name,null,value); if(_id != -1) { returncount++; } } db.settransactionsuccessful(); } { db.endtransaction(); } getcontext().getcontentresolver().notifychange(uri,null); return returncount; default: return super.bulkinsert(uri,values); } } @override @targetapi(11) public void shutdown() { mopenhelper.close(); super.shutdown(); } }
use recyclerview instead of gridview
Comments
Post a Comment