draw To Center Of Canvas - Android Graphics

Android examples for Graphics:Canvas

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Description

draw To Center Of Canvas

Demo Code


//package com.java2s;
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);
            cacheRect.offset((max_width - f_w) / 2, (max_height - f_h) / 2);
            canvas.drawBitmap(bp, null, cacheRect, null);
        }//from www  .  j  ava  2  s .  c  om
    }
}

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