draw To Center Of Canvas - Android android.graphics

Android examples for android.graphics:Canvas

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  4. Canvas

Description

draw To Center Of Canvas

Demo Code

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Rect;

public class Main {

  public static void drawToCenterOfCanvas(Canvas canvas, Bitmap bp, int max_width, int max_height, Rect cacheRect) {
    final int b_w = bp.getWidth();
    final int b_h = bp.getHeight();
    if (b_w <= max_width && b_h <= max_height) { // center aligned
      canvas.drawBitmap(bp, (max_width - b_w) / 2, (max_height - b_h) / 2, null);
    } else { // scaled fix given rect size
      final float s_w = 1.0f * max_width / b_w;
      final float s_h = 1.0f * max_height / b_h;
      final float f_s = Math.min(s_w, s_h);
      final int f_w = (int) (b_w * f_s);
      final int f_h = (int) (b_h * f_s);
      cacheRect.set(0, 0, f_w, f_h);/* w  w w .  ja  v  a 2s . c  o  m*/
      cacheRect.offset((max_width - f_w) / 2, (max_height - f_h) / 2);
      canvas.drawBitmap(bp, null, cacheRect, null);
    }
  }

}

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