Question

I m very new to Android.

I want to create a dynamic OnClick button functionality.

OnClick of “+” above , it should create a other layer , like this below.

My confusion , my entire design UI is in layout.xml.

How we can we include another layer in our UI on OnClick of “+” button.

Any input would be helpful.

Thanks !!!

Answer 1

In your XML have one Vertical Linear Layout to add and remove EditTexts at runtime, Here I have shown you code I have used in my demos. To handle and maintain the usage.

Onclick of your Add and Minus button click

    public void onClick(View view) {
        super.onClick(view);
        switch (view.getId()) {

        case R.id.btnadd:
            createTextview(counter);
            counter++;
            if (counter > 3) {
                btnAdd.setVisibility(View.GONE);
                btnRemove.setVisibility(View.VISIBLE);
            }
            break;
        case R.id.btnremove:
            removeView(counter);
            txtoption[counter - 1] = null;
            counter--;
            if (counter < 3) {
                btnAdd.setVisibility(View.VISIBLE);
                btnRemove.setVisibility(View.GONE);
            }

            break;
        }
    }

Functions to create and remove view

private void createTextview(int index) {
    txtoption[index] = new EditText(this);
    txtoption[index].setSingleLine(true);
    LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(
            LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
    param.bottomMargin = 10;
    txtoption[index].setLayoutParams(param);
    txtoption[index].setBackgroundResource(R.drawable.textbox);
    txtoption[index].setTypeface(ttfDroidSherif);
    lnpolloptions.addView(txtoption[index]);

}

private void removeView(int index) {
    lnpolloptions.removeView(txtoption[index - 1]);
}

Your vertical LinearLayout to contain all the edittext childs

LinearLayout lnpolloptions = (LinearLayout) findViewById(R.id.lnpolloptions);

Arrays of edittext to be created of removed at runtime

private EditText[] txtoption = new EditText[4];

Onclick of submit to get value from each textbox

            int length = txtoption.length;
            for (int i = 0; i < length; i++) {
                if (txtoption[i] != null) {
                    Log.i("Value",""+txtoption[i].getText());
                }
            }