Question

I have add buttons in GridView using base adapter, that buttons depend on word length when click the button then hide. After clicking all buttons the GridView is make empty i want to check, if GridView is Empty Display another buttons. I want to check whether GridView is empty or not in GridViewActivity.java

Here is the code.

GridViewActivity.java

public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.spellword);

        txt=(TextView)findViewById(R.id.txtview);
        image=(ImageView)findViewById(R.id.imgview1);

        map.put("melon", R.drawable.melon);
        image.setImageResource(map.get("melon"));


        gridView=(GridView)findViewById(R.id.grid1);
        gridView.setAdapter(new SpellAdapter(this,words,word));

        detector = new SimpleGestureFilter(this, this);

    }

SpellAdapter.java

public class SpellAdapter extends BaseAdapter{

    public Context context;
    public char[] word;

    public SpellAdapter(Context context, char[] word, String orglWord)
    {
        this.context=context;
        this.word=word;

    }

    public int getCount() {
        count=word.length;
        return count;
    }

    public Object getItem(int position) {

        return null;
    }

    public long getItemId(int position) {

        return 0;
    }


    public View getView(final int position, View convertView, ViewGroup arg2) {

        View v = convertView;
        if (v == null) 
        {  
             LayoutInflater vi = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
             v = vi.inflate(R.layout.buttonlist, null);
        } 

        final Button btn= (Button)v.findViewById(R.id.letterbtn);

        btn.setText(word[position]+"");

        btn.setOnClickListener(new OnClickListener(){

            public void onClick(View v) 
            {
                letters=btn.getText();
                String word = letters.toString();
                btn.setVisibility(View.GONE);

            }


        });

        return v; 
    }




}

Answer 1

if (gridView.getChildCount() == 0) {...}

If this doesn’t work try:

if (SpellAdapter.isEmpty()) {...} Or I think you would need to do something like:

if (gridView.getAdapter().isEmpty()) {...}

You can find this info here and here

Edit:

Oh I think I see what you mean now. You just hide the button, you don’t remove it. So you will need to use a loop. First, get the number of child count. Then do a for, like:

for ( int x = 0; x < childcount; x++)

Inside the for you use View v = gridView.getChildAt(x);

Then you do if (v instanceof Button) and inside the if you check if the button is visible or not. If it is visible, set false inside a variable like boolean gridViewEmpty and break the loop. Else, set gridViewEmpty to true and then display your other buttons.