How to do multiselect functionality on grid view items on tap?

This is a rough solution of what you need to do:

1) Maintain a list which will contain the positions of currently selected items.

private ArrayList<Integer> mSelected = new ArrayList<Integer>(); 

When you click on item (select item), add it to the list. When you click on item again (deselect item), remove from the list.

 public void onItemSelect(AdapterView<?> parent, View v, int pos, long id) { Integer position = new Integer(pos); if(mSelected.contains(position)) { mSelected.remove(position); // remove item from list // update view (v) state here // eg: remove highlight } else { mSelected.add(position); // add item to list // update view (v) state here // eg: add highlight } } 

2) You have to update the view, to show if item is selected or not, I will add code (+comments) on where to do that.

3) In the end, the list will contain all items which have been selected.

Here is the code which shows you where to place the above code.

Code:

public class FragmentOrder extends Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { //View view = inflater.inflate(R.layout.g, null); View view = inflater.inflate(R.layout.gridview,null); final GridView listView = (GridView) view.findViewById(R.id.mainGrid); final OrderGridViewAdapter adapter = new OrderGridViewAdapter(MainActivity.this) listView.setAdapter(adapter); //int setSelected = 0; listView.setSelected(true); listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { adapter.onItemSelect(arg0, arg1, arg2, arg3); } }); return view; } } 

Adapter:

public class OrderGridViewAdapter extends BaseAdapter{ private Context MContext; private ArrayList<Integer> mSelected = new ArrayList<Integer>(); public OrderGridViewAdapter(Context C){ MContext = C; } @Override public int getCount() { return mThumbIds.length; } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return 0; } public void onItemSelect(AdapterView<?> parent, View v, int pos, long id) { Integer position = new Integer(pos); if(mSelected.contains(position)) { mSelected.remove(position); // update view (v) state here // eg: remove highlight } else { mSelected.add(position); // update view (v) state here // eg: add highlight } } @Override public View getView(int position, View convertView, ViewGroup parent) { View myView; LayoutInflater inflater = (LayoutInflater)MContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); myView = inflater.inflate(R.layout.grid_items_ontap, null); // Add The Image!!! ImageView iv = (ImageView)myView.findViewById(R.id.grid_item_image_OnTap); iv.setImageResource(mThumbIds[position]); // Add The Text!!! TextView tv = (TextView)myView.findViewById(R.id.grid_item_text_onTap); tv.setText(names[position] ); // Set view highlight here, based on if it is selected or not.. if(mSelected.contains(position)) { // update view (v) state here // eg: add highlight } else { // update view (v) state here // eg: remove highlight } return myView; } private Integer[] mThumbIds = { R.drawable.car, R.drawable.car, R.drawable.car, R.drawable.car, R.drawable.car,R.drawable.car,R.drawable.car,R.drawable.car, R.drawable.car, R.drawable.car, R.drawable.car, R.drawable.car,R.drawable.car,R.drawable.car }; private String[] names={"ab","cd","ef","gh","ij","kl","mn","","","","","","",""}; } 

Update: To update the view, you should read about how to change properties of the view programatically. For example, if you want to change the background color:

v.setBackgroundColor(Color.parseColor("#000000")); // change to black