Question

Hi can some one suggest me a sample example of how i can sort the textviews based on the numbers in textviews. I am able to get the text from the TextViews need to sort and place the lowest number first.

Thank you.

public void sortNumbers(View v) {

    String[] numbers = new String[7];
    numbers[0] = textView23.getText().toString();
    numbers[1] = textView33.getText().toString();
    numbers[2] = textView43.getText().toString();
    numbers[3] = textView53.getText().toString();
    numbers[4] = textView63.getText().toString();
    numbers[5] = textView73.getText().toString();
    numbers[6] = textView83.getText().toString();

    Integer[] intValues = new Integer[numbers.length];
    for (int i = 0; i < numbers.length; i++) {
        intValues[i] = Integer.parseInt(numbers[i].trim());
    }
    Collections.sort(Arrays.asList(intValues));

    for (int i = 0; i < intValues.length; i++) {
        Integer intValue = intValues[i];

        //here I want to assign sorted numberes to the TextViews


    }

}

---

So I have followed Jeffrey’s advice. Here is the code which still doesn’t work properly. What could be wrong?

Created an array of TextViews:

TextView[] tvs = new TextView[7];

    tvs[0] = textView23;
    tvs[1] = textView33;
    tvs[2] = textView43;
    tvs[3] = textView53;
    tvs[4] = textView63;
    tvs[5] = textView73;
    tvs[6] = textView83;

Sorted the array and assinged new values to the TextViews:

    Arrays.sort(tvs, new TVTextComparator());

    textView23.setText(tvs[0].getText().toString());
    textView33.setText(tvs[1].getText().toString());
    textView43.setText(tvs[2].getText().toString());
    textView53.setText(tvs[3].getText().toString());
    textView63.setText(tvs[4].getText().toString());
    textView73.setText(tvs[5].getText().toString());
    textView83.setText(tvs[6].getText().toString());    

And here is the Comporator class:

public class TVTextComparator implements Comparator<TextView> {
    public int compare(TextView lhs, TextView rhs) {

        Integer oneInt = Integer.parseInt(lhs.getText().toString());
        Integer twoInt = Integer.parseInt(rhs.getText().toString());

        return oneInt.compareTo(twoInt);
    }
}

Answer 1

to sort your textViews, first put them in an array,

TextView[] tvs = new TextView[7];
tvs[0] = textView23;
tvs[1] = textView33;
// and so on

note that if you have handle to the parent container, you could easily build the array by using ViewGroup.getChildCount() and getChildAt().

now write a comparator for a text view,

class TVTextComparator implements Comparator<TextView> {
  @Override
  public int compare(TextView lhs, TextView rhs) {
    return lhs.getText().toString().compareTo(rhs.getText().toString());
    // should check for nulls here, this is NOT a robust impl of compare()
  }
}

now use the comparator to sort the array,

Arrays.sort(tvs, 0, tvs.length, new TVTextComparator());