combine Bitmap foreground and background - Android Graphics

Android examples for Graphics:Bitmap Paint

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Description

combine Bitmap foreground and background

Demo Code


import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;

public class Main{
    public static Bitmap combineBitmap(Bitmap background, Bitmap foreground) {
        if (background == null) {
            return null;
        }//w ww  . j a v a2 s .co  m
        int bgWidth = background.getWidth();
        int bgHeight = background.getHeight();
        int fgWidth = foreground.getWidth();
        int fgHeight = foreground.getHeight();
        Bitmap newmap = Bitmap.createBitmap(bgWidth, bgHeight,
                Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(newmap);
        canvas.drawBitmap(background, 0, 0, null);
        canvas.drawBitmap(foreground, (bgWidth - fgWidth) / 2,
                (bgHeight - fgHeight) / 2, null);
        canvas.save(Canvas.ALL_SAVE_FLAG);
        canvas.restore();
        return newmap;
    }
}

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