The adapter shows only one item will JSON has more than that number how can the adapter shows all the JSON elements? i have loader and it is only shows one element and repeat it? the JSON ger elements doesn't show in the adapter I tried things but it doesn't work !! how can I show and take every single element from the response.
the image shows the elements
the adapter:
public class shelfsAdapter extends ArrayAdapter < shelfs > {
public shelfsAdapter(MainActivity context, ArrayList < shelfs > objects) {
super(context, 0, objects);
}@
Override
public View getView(int position, View convertView, ViewGroup parent) {
View listItem = convertView;
if (listItem == null) {
listItem = LayoutInflater.from(getContext())
.inflate(R.layout.item, parent, false);
}
shelfs current = getItem(position);
TextView title = (TextView) listItem.findViewById(R.id.title);
title.setText(current.getTitle());
TextView author = (TextView) listItem.findViewById(R.id.author);
author.setText(current.getAuthors());
return listItem;
}
}
the loader:
public class LoaderApp extends AsyncTaskLoader<List<shelfs>> {
private String url;
public LoaderApp( Context context,String mUrl) {
super(context);
url = mUrl;
}
@Override
protected void onStartLoading() {
Log.v("forceload","force close dossseeeeeee!!!");
forceLoad();
}
@Override
public List<shelfs> loadInBackground(){
if(url==null){return null;}
Log.v("get books","get books");
List<shelfs> books = QueryUtils.fetchData(url);
Log.v("get query","get query");
Log.v("equals query","equals"+books.get(0)+""+books.get(2));
// books.add(new shelfs("books","books inback "));
return books;
}
the main Activity:
public class MainActivity extends AppCompatActivity implements LoaderManager.LoaderCallbacks<List<shelfs>> {
private shelfsAdapter adapter;
private static final String url = "https://www.googleapis.com/books/v1/volumes?q={search%20terms}";
private static final int ID=1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//final String url1=" https://www.googleapis.com/books/v1/volumes?q=android&maxResults=1\n";
adapter = new shelfsAdapter(this, new ArrayList<shelfs>());
ListView listView = (ListView) findViewById(R.id.list);
Log.v("geturl fine","fine get it");
listView.setAdapter(adapter);
ConnectivityManager connMgr = (ConnectivityManager)
getSystemService(Context.CONNECTIVITY_SERVICE);
// Get details on the currently active default data network
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
// If there is a network connection, fetch data
if (networkInfo != null && networkInfo.isConnected()) {
// Get a reference to the LoaderManager, in order to interact with loaders.
android.app.LoaderManager loaderManager = getLoaderManager();
Log.v("loading ","loader inflater");
// Initialize the loader. Pass in the int ID constant defined above and pass in null for
// the bundle. Pass in this activity for the LoaderCallbacks parameter (which is valid
// because this activity implements the LoaderCallbacks interface).
getSupportLoaderManager().initLoader(ID, null, this);
}}
@NonNull
@Override
public Loader<List<shelfs>> onCreateLoader(int id, @Nullable Bundle args) {
Log.v("get load","get load on create");
Toast.makeText(this,"creat it just!!!",Toast.LENGTH_SHORT).show();
adapter.add(new shelfs("oncreat","loadApp on create loader"));
return new LoaderApp(this,url);
}
@Override
public void onLoadFinished(@NonNull Loader<List<shelfs>> loader, List<shelfs> data) {
if(data != null && !data.isEmpty() )
Log.v("get load","get load on finished");
// adapter.add(new shelfs("onloadfinish","addall??"));
adapter.addAll(data);
adapter.notifyDataSetChanged();
// Log.v("data add","data"+data.get(0)+""+data.get(6));
// Toast.makeText(this,"data",Toast.LENGTH_SHORT).show();
}
@Override
public void onLoaderReset(@NonNull Loader<List<shelfs>> loader) {
Log.v("get load","get load on reset");
adapter.clear();
}
and the json class:
public class QueryUtils {
public QueryUtils(){}
public static List<shelfs> fetchData(String requestUrl) {
if (requestUrl ==null) {return null;}
Log.v("fetchData work!","fetchData work!");
URL uRl=getUrl(requestUrl);
Log.v("geturl work!","geturl work!");
String json=null;
try {
json=makeHttprequest(uRl);
Log.v("makehttp work!","makehttp work!");
}catch (IOException e){Log.v("error fetch","error fetch");}
List<shelfs> makeit=ExtractJsonData(json);
Log.v("extractdata work!","extractdata work!");
return makeit;
}
public static URL getUrl(String urlhttp) {
URL url=null;
try{ url=new URL(urlhttp);}
catch (MalformedURLException e){Log.v("url error","url error",e);}
return url;
}
public static String readStream(InputStream inputStream) throws IOException {
StringBuilder stringBuilder=new StringBuilder();
if(inputStream!=null)
{ InputStreamReader isr=new InputStreamReader(inputStream, Charset.forName("UTF-8"));
BufferedReader reader=new BufferedReader(isr);
String line=reader.readLine();
while(line!=null){stringBuilder.append(line);
line=reader.readLine();}}
return stringBuilder.toString();
}
public static String makeHttprequest(URL url)throws IOException{
String jsonResponse="";
InputStream inputStream=null;
HttpURLConnection urlConnection=null;
try {
urlConnection=(HttpURLConnection)url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setReadTimeout(10000);
urlConnection.setConnectTimeout(15000);
urlConnection.connect();
if(urlConnection.getResponseCode()==200)
{inputStream=urlConnection.getInputStream();
jsonResponse=readStream(inputStream);
Log.e("connect error","connect");}}
catch(IOException e){Log.e("connect error","connect error");}
finally{
if(urlConnection!=null){urlConnection.disconnect();}
if(inputStream!=null){inputStream.close();}
}
return jsonResponse; }
public static List<shelfs> ExtractJsonData(String jsonResponse){
List<shelfs> putshelfs=new ArrayList<>();
try {
JSONObject base=new JSONObject(jsonResponse);
JSONArray items=base.getJSONArray("items");
shelfs firstShelfs=new shelfs("","");
for(int i=0;i<items.length();i++)
{
JSONObject index = items.getJSONObject(i);
JSONObject volume=index.getJSONObject("volumeInfo");
String title=volume.getString("title");
JSONArray authors=volume.getJSONArray("authors");
String auth=authors.getString(0);
firstShelfs= new shelfs(title,auth);
putshelfs.add(i,firstShelfs);
Log.v("gggg","net get"+i+auth+title+"dom");}
Log.v("dff","json take");
} catch (JSONException e) {
e.printStackTrace(); }
return putshelfs;}
}