combine Bitmap Images To Same Size - Android Graphics

Android examples for Graphics:Bitmap Combine

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Description

combine Bitmap Images To Same Size

Demo Code

/**/*from   w w w.j a v  a  2s .  com*/
 * Copyright 2014 Zhenguo Jin
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;

import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;

import android.graphics.Canvas;

import android.graphics.Matrix;
import android.graphics.Paint;

import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;

public class Main {

    public static Bitmap combineImagesToSameSize(Bitmap bgd, Bitmap fg) {
        Bitmap bmp;

        int width = bgd.getWidth() < fg.getWidth() ? bgd.getWidth() : fg
                .getWidth();
        int height = bgd.getHeight() < fg.getHeight() ? bgd.getHeight()
                : fg.getHeight();

        if (fg.getWidth() != width && fg.getHeight() != height) {
            fg = zoom(fg, width, height);
        }
        if (bgd.getWidth() != width && bgd.getHeight() != height) {
            bgd = zoom(bgd, width, height);
        }

        bmp = Bitmap.createBitmap(width, height, Config.ARGB_8888);
        Paint paint = new Paint();
        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_ATOP));

        Canvas canvas = new Canvas(bmp);
        canvas.drawBitmap(bgd, 0, 0, null);
        canvas.drawBitmap(fg, 0, 0, paint);

        return bmp;
    }

    public static Bitmap zoom(Bitmap bitmap, int w, int h) {
        int width = bitmap.getWidth();
        int height = bitmap.getHeight();
        Matrix matrix = new Matrix();
        float scaleWidht = ((float) w / width);
        float scaleHeight = ((float) h / height);
        matrix.postScale(scaleWidht, scaleHeight);
        Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height,
                matrix, true);
        return newbmp;
    }
}

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