Actually i found an example and iam just trying to modify it to load some images in Grid View by using picasso. i made a custom adapter to hold it ,, but what only appears is just blank screen and i cant figure out why ? , here is my code.
activity_main.xml
<fragment xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/container" android:name="com.example.dell2014.popularmovies.MoviesFragment" tools:layout="@layout/fragment_main" android:layout_width="match_parent" android:layout_height="match_parent" /> fragment_main.xml
<GridView android:id="@+id/movies_gridview" android:layout_width="match_parent" android:layout_height="match_parent" android:numColumns="auto_fit" android:gravity="center" android:columnWidth="100dp" android:verticalSpacing="5dp" android:horizontalSpacing="5dp" android:padding="5dp" /> image_item_movie.xml
<ImageView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:adjustViewBounds="true" android:scaleType="fitCenter" android:id="@+id/image_item_movies" /> Movie.java
import android.content.Context; import android.database.DataSetObserver; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.ListAdapter; import com.squareup.picasso.Picasso; import java.util.ArrayList; public class Movie extends BaseAdapter { private Context mContext; public Movie(Context c ) { this.mContext = c; } String[] eatFoodyImages = { "http://i.imgur.com/rFLNqWI.jpg", "http://i.imgur.com/C9pBVt7.jpg", "http://i.imgur.com/rT5vXE1.jpg", "http://i.imgur.com/aIy5R2k.jpg", "http://i.imgur.com/MoJs9pT.jpg", "http://i.imgur.com/S963yEM.jpg", "http://i.imgur.com/rLR2cyc.jpg", "http://i.imgur.com/SEPdUIx.jpg", "http://i.imgur.com/aC9OjaM.jpg", "http://i.imgur.com/76Jfv9b.jpg", "http://i.imgur.com/fUX7EIB.jpg", "http://i.imgur.com/syELajx.jpg", "http://i.imgur.com/COzBnru.jpg", "http://i.imgur.com/Z3QjilA.jpg", }; @Override public View getView(int position, View convertView, ViewGroup parent) { ImageView imageView; if(convertView == null){ imageView = new ImageView(mContext); } else{ imageView = (ImageView) convertView; } Picasso.with(mContext).setLoggingEnabled(true); Picasso.with(mContext) .load(eatFoodyImages[position]) .fit() .into(imageView); return imageView; } @Override public int getCount() { // TODO Auto-generated method stub return eatFoodyImages.length; } @Override public Object getItem(int position) { // TODO Auto-generated method stub return null; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return eatFoodyImages.length; } } MoviesFragment.java
import android.os.AsyncTask; import android.support.v4.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.GridView; /** * A placeholder fragment containing a simple view. */ public class MoviesFragment extends Fragment { public MoviesFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_main, container, false); GridView gridView = (GridView) rootView.findViewById(R.id.movies_gridview); gridView.setAdapter(new Movie(getActivity().getApplicationContext())); return rootView; } public class FetchMoviesTask extends AsyncTask<String, Void,String[]> { @Override protected String[] doInBackground(String... strings) { return new String[0]; } protected void onPostExecute( String[] result) {} } } MainActivity.java
import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.GridView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { GridView grid; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); if(savedInstanceState == null){ getSupportFragmentManager() .beginTransaction().add(R.id.container, new MoviesFragment()) .commit(); } grid = (GridView)findViewById(R.id.movies_gridview); grid.setAdapter(new Movie(this)); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } }
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