How to load image from api into gridview using adapter in android studio? - android-studio

Question

public class MainActivityFragment extends Fragment {
static String[] str1;
GridView gridview;
public MainActivityFragment() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setHasOptionsMenu(true);
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.refresh_menu, menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id=item.getItemId();
if (id == R.id.action_refresh) {
updateWeather();
return true;
}
return super.onOptionsItemSelected(item);
}
private void updateWeather() {
fetchMovies movieTask=new fetchMovies();
movieTask.execute("hi");
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootview=inflater.inflate(R.layout.fragment_main, container, false);
gridview=(GridView)rootview.findViewById(R.id.gridview);
//gridview.setAdapter(new ImageAdapter(getActivity()));
return rootview;
}
public class fetchMovies extends AsyncTask<String,Void,String[]> {
private final String LOG_TAG = fetchMovies.class.getSimpleName();
private String[] getMovieDataFromJson(String forecastJsonStr, int numDays)
throws JSONException {
JSONObject movieJson = new JSONObject(forecastJsonStr);
JSONArray movieArray = movieJson.getJSONArray("results");
String[] resultStrs = new String[movieArray.length()];
for(int i = 0; i < movieArray.length(); i++) {
JSONObject getMovie = movieArray.getJSONObject(i);
String moviePosterPathImage=getMovie.getString("poster_path");
String movieOverview=getMovie.getString("overview");
String split_release_date=getMovie.getString("release_date");
String[] Segments = split_release_date.split("-");
String release_date=Segments[1]+"-"+Segments[2]+"-"+Segments[0];
String title=getMovie.getString("title");
Double vote_Average=getMovie.getDouble("vote_average");
resultStrs[i] = moviePosterPathImage + " - " + movieOverview + " - " + release_date + " - " + title + " - " + vote_Average;
}
for (String s : resultStrs) {
Log.v(LOG_TAG, "Forecast entry: " + s);
}
return resultStrs;
}
#Override
protected String[] doInBackground(String... params) {
HttpURLConnection urlConnection=null;
BufferedReader reader=null;
//will contain the raw json response as a string
String forecastJsonStr=null;
int Format_Cnt_Value=7;
String Format_Api="api_key";
try {
String Format_Mode="sort_by";
String Format_Mode_Val="popularity.desc";
String OPEN_MOVIES_API_KEY="-----My Api Key------";
String baseUrl="http://api.themoviedb.org/3/discover/movie?";
Uri builtUri=Uri.parse(baseUrl).buildUpon()
.appendQueryParameter(Format_Mode,Format_Mode_Val)
.appendQueryParameter(Format_Api,OPEN_MOVIES_API_KEY)
.build();
URL url=new URL(builtUri.toString());
Log.v(LOG_TAG,"test_Uri= " + builtUri);
urlConnection= (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.connect();
InputStream inputStream=urlConnection.getInputStream();
StringBuffer buffer = new StringBuffer();
if (inputStream == null) {
// Nothing to do.
return null;
}
reader = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
// Since it's JSON, adding a newline isn't necessary (it won't affect parsing)
// But it does make debugging a *lot* easier if you print out the completed
// buffer for debugging.
buffer.append(line + "\n");
}
if (buffer.length() == 0) {
// Stream was empty. No point in parsing.
return null;
}
forecastJsonStr = buffer.toString();
Log.v(LOG_TAG, "Forecast JsonString:=" + forecastJsonStr);
} catch (IOException e) {
Log.e(LOG_TAG, "Error ", e);
// If the code didn't successfully get the weather data, there's no point in attemping
// to parse it.
return null;
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
if (reader != null) {
try {
reader.close();
} catch (final IOException e) {
Log.e(LOG_TAG, "Error closing stream", e);
}
}
};
try {
return getMovieDataFromJson(forecastJsonStr,Format_Cnt_Value);
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String[] Strings) {
if (Strings != null) {
//adp.clear();
str1 = new String[Strings.length];
for (int i = 0; i < Strings.length; i++) {
String[] getImage=Strings[i].split("-");
str1[i] = "http://image.tmdb.org/t/p/w185/" + getImage[0];
}
adp=new ImageAdapter(getActivity(),str1);
gridview.setAdapter(adp); //error
}
}
}
}
what should I do now....
I also have ImageAdapter class
public class ImageAdapter extends BaseAdapter {
private Context mContext;
private String[] mThumbIds;
public ImageAdapter(Context c,String[] str2) {
mContext = c;
mThumbIds=str2;
}
#Override
public int getCount() {
if(mThumbIds!=null)
{
return mThumbIds.length;
}
else
{
return 0;
}
}
#Override
public Object getItem(int position) {
return null;
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) {
// if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(500,500));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(4, 4, 4, 4);
} else {
imageView = (ImageView) convertView;
}
// imageView.setImageResource(Integer.parseInt(mThumbIds[position]));
imageView.setImageResource(Integer.parseInt(mThumbIds[position]));
return imageView;
}
}
Please help.
I have loaded data from api and want to fill the gridview.
I am getting images in string[]...how to populate gridview..
I need your help to populate gridview using adapter
billions of thanks in advance.

Answer 1

Use Picasso library to load url images in your grid view.Check out this link on how to use picasso.
In your adapter getView() method add this line:
Picasso.with(mContext).load(mThumbIds[position]).into(imageView);