<LinearLayout
  android:layout_width="wrap_content"
  android:id="@+id/llAddView"
  android:layout_height="wrap_content"
  android:orientation="vertical">
</LinearLayout>

LinearLayout linearLayout =  (LinearLayout) findViewById(R.id.llAddView);
    EditText newET= new EditText (this);
    newET.setText("");
    newET.setLayoutParams(new LayoutParams(
            LayoutParams.MATCH_PARENT,
            LayoutParams.WRAP_CONTENT));

    linearLayout.addView(newET);