Random icon position in canvas

We want an icon in canvas has random position when appear.

Copy in to onDraw.

Random generato = new Random();

int so = generato.nextInt(3);

Paint paint = new Paint();

paint.setTextSize(45);

paint.setColor(Color.parseColor("#FF00FF"));

canvas.drawText(so+"", r/2, 100, paint);

Run to see number from 0 to 2 appear. Random generate number from 0 to nextInt, we use these number set position to icon.

We have an icon name smile run pass over screen width.

If we random y index, it will appear in any position along with screen height.

Add to if command.

Random generato = new Random();

y = generato.nextInt(c) – smile.getHeight();

Now icon has random position.

If we want icon has another face when reappear, use Random like this.

Random generato = new Random();

int number = generato.nextInt(3);

switch (number){

     case 0:

     smile = BitmapFactory.decodeResource

      (this.getResources(), R.drawable.smile1);

     break;

     case 1:

     smile = BitmapFactory.decodeResource

      (this.getResources(), R.drawable.smile2);

     break;

     case 2:

     smile = BitmapFactory.decodeResource

      (this.getResources(), R.drawable.smile3);

     break;

}

Add to if command.

if(x>r){

x=- smile.getWidth();

Random generato = new Random();

y = generato.nextInt(c) - smile.getHeight();

Random generato2 = new Random();

int number = generato2.nextInt(3);

switch (number){

case 0:

smile = BitmapFactory.decodeResource

      (this.getResources(), R.drawable. smile);

break;

case 1:

smile = BitmapFactory.decodeResource

      (this.getResources(), R.drawable. smile2);

break;

case 2:

smile = BitmapFactory.decodeResource

      (this.getResources(), R.drawable. smile3);

break;

}

}

Run to see result.