Question

how to combine two list views into one view in android.Both List Views have unique ids.If first_list id is present then it should be “ADD” button visible.If second_list id is present then it should be “Remove” button visible.Plz help me.

Thanks

Answer 1

Does the following class correspond to what you need ?

public class DoubleListView extends LinearLayout {

    private Button button;

    public final ListView list1, list2;

    public DoubleListView(Context context) {
        super(context);

        setOrientation(VERTICAL);

        list1 = new ListView(context);
        addView(list1, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1));

        list2 = new ListView(context);
        addView(list2, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1));

        button = new Button(context);
        addView(button, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));

        // Initial state
        list2.setVisibility(View.GONE);
        updateContent();
    }

    private void updateContent() {
        if(list2.getVisibility() == View.VISIBLE) {
            button.setText("REMOVE");
            button.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    list2.setVisibility(View.GONE);
                    updateContent();
                }
            });
        }
        else {
            button.setText("ADD");
            button.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    list2.setVisibility(View.VISIBLE);
                    updateContent();
                }
            });
        }
    }

}

You can use it in a sample activity like this:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    DoubleListView dbleListView = new DoubleListView(this);
    dbleListView.list1.setBackgroundColor(Color.RED);
    dbleListView.list2.setBackgroundColor(Color.BLUE);
    setContentView(dbleListView);
}