Android: You must call removeView() on the child's parent first 2

Question

I have a problem in Android creating a table adding rows dynamically. The error message is:

The specified child already has a parent. You mu

Answer 1

because you are trying to put the same textView many times. you can use it only once, so you have to instantiate it again and again :

// you remove the definition of the text views here and you put it inside the loop
    for (ArrayList al : l){
        int i = 0;
        for(String s : al){
 TextView tv_item2 = new TextView(this);
TextView tv_item1 = new TextView(this);
TextView tv_item3 = new TextView(this);
            if (i == 0){
                i++;

                tv_item1.setText(s);
                tv_item1.setGravity(Gravity.CENTER);
            }
            if (i == 1){

                tv_item2.setText(s);
                tv_item2.setGravity(Gravity.CENTER);
                i++;
            }
            if (i == 2){

                tv_item3.setText(s);
                tv_item3.setGravity(Gravity.CENTER);
                tr.addView(tv_item1);
                tr.addView(tv_item2);
                tr.addView(tv_item3);
                table.addView(tr, new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
            }
        }
    }

This is not the best way to do it, you should may be creat a methode that takes your "i" as parameter and returns a TextView (with gravity center ... and your staff).