Question

I have a ListView and a widget. I want the widget to be always on the top of ListView, and it should be able to scroll with the items but when there is no items in adapter it should still be visible. This is how it doesn’t scroll:

The layout file:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:orientation="vertical">
    <Button
            android:id="@+id/btn_togle_empty"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="toggle empty"
            />


    <FrameLayout
            android:layout_width="fill_parent"
            android:layout_height="0dp"
            android:layout_weight="1">
        <ListView
                android:id="@+id/list_test"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"


                />
        <ViewStub
                android:id="@+id/empty_layout"
                android:layout="@layout/empty"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"/>
    </FrameLayout>

</LinearLayout>

The code for the activity:

public class MyActivity extends Activity {
    private MyAdapter adapter;
    private ListView v;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test);
         v = (ListView) findViewById(R.id.list_test);
        View empty = findViewById(R.id.empty_layout);
        v.setEmptyView(empty);
        final MyAdapter adapter = new MyAdapter();
        v.setAdapter(adapter);
        Button btn = (Button) findViewById(R.id.btn_togle_empty);
        btn.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View view) {
                adapter.togleEmpty();
            }
        });
    }

    private  class MyAdapter extends BaseAdapter {
       boolean empty = false;
        @Override
        public int getCount() {
            return empty ? 0 : 50;
        }

        @Override
        public Object getItem(int i) {
            return new Object();
        }

        @Override
        public long getItemId(int i) {
            return i;
        }

        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
            TextView v =  new TextView(MyActivity.this);
            v.setText("STRING");
            return v;
        }


        public void togleEmpty() {
            empty = !empty;
            notifyDataSetChanged();
        }
    }
}

I had one more idea, add the widget as header, but it disappears when the ListView is empty. How can I achieve the result I want?

Answer 1

        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
            if (i == 0) { return custom_widget_view; }
        }