draw Bitmap Image on Canvas - Android android.graphics

Android examples for android.graphics:Canvas

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  3. android.graphics
  4. Canvas

Description

draw Bitmap Image on Canvas

Demo Code

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PointF;
import android.graphics.Rect;
import android.graphics.RectF;

public class Main {

  public static int RIGHT = 16;
  public static int BOTTOM = 2;
  public static int TOP = 1;
  public static int VCENTER = 4;
  public static int LEFT = 8;
  public static int HCENTER = 32;

  public static void drawImage(Canvas canvas, Bitmap image, int x, int y, int situation, Paint paint) {
    int rect_x = 0;
    int rect_y = 0;
    int xx = situation & 56;
    int yy = situation & 7;
    if (image == null) {
      return;/*from w  w w .j  av  a  2 s  .  com*/
    }
    if (xx == LEFT) {
      rect_x = x;
    } else if (xx == RIGHT) {
      rect_x = x - image.getWidth();
    } else if (xx == HCENTER) {
      rect_x = x - image.getWidth() / 2;
    }

    if (yy == TOP) {
      rect_y = y;
    } else if (yy == BOTTOM) {
      rect_y = y - image.getHeight();
    } else if (yy == VCENTER) {
      rect_y = y - image.getHeight() / 2;
    }
    canvas.drawBitmap(image, rect_x, rect_y, paint);
  }

  public static void drawImage(Canvas canvas, Bitmap image, PointF center, float scale, Paint paint) {
    if (scale <= 0 || image == null)
      return;

    float zoomHeight = image.getHeight() * scale;
    float zoomWidth = image.getWidth() * scale;

    float left = center.x - zoomWidth / 2.0f;
    float top = center.y - zoomHeight / 2.0f;

    Rect srcRect = new Rect(0, 0, image.getWidth(), image.getHeight());
    RectF dstRect = new RectF(left, top, left + zoomWidth, top + zoomHeight);

    canvas.drawBitmap(image, srcRect, dstRect, paint);
  }

}

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