Question

Currently I’m developing an Android app which draws a point on the coordinates input by the user. I’m rather new to java so please assist me. Cheers.

@Override
    public void onDraw(Canvas canvas) {


    float[] manualpointx ={100,200,300,400,500,600};
    float[] manualpointy ={120,300,400,560,600,500};
      for (int i = 0;i<100;i=i+1)
      {
          canvas.drawCircle(manualpointx[i], manualpointy[i], 5, paint);
          invalidate();
      }
}

The problem happens when canvas.drawcircle is called and the app crashes.

Answer 1

Apparently you refer to manualpointx[i] and manualpointy[i] for i from 0 to 99 and the fact is that they are not defined for i greater than 5. You try to refer to a cell of an array that is out of the bounds of the array.