Android Bitmap Resize resizeDownBySideLength(Bitmap bitmap, int maxLength, boolean recycle)

Description

resize Down By Side Length

License

Apache License

Declaration

public static Bitmap resizeDownBySideLength(Bitmap bitmap,
            int maxLength, boolean recycle) 

Method Source Code

//package com.java2s;
/*/*from   ww  w  . java  2s. c o  m*/
 * Copyright (C) 2010 The Android Open Source Project
 *
 * 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.
 */

import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.graphics.Paint;

public class Main {
    public static Bitmap resizeDownBySideLength(Bitmap bitmap,
            int maxLength, boolean recycle) {
        int srcWidth = bitmap.getWidth();
        int srcHeight = bitmap.getHeight();
        float scale = Math.min((float) maxLength / srcWidth,
                (float) maxLength / srcHeight);
        if (scale >= 1.0f)
            return bitmap;
        return resizeBitmapByScale(bitmap, scale, recycle);
    }

    public static Bitmap resizeBitmapByScale(Bitmap bitmap, float scale,
            boolean recycle) {
        int width = Math.round(bitmap.getWidth() * scale);
        int height = Math.round(bitmap.getHeight() * scale);
        if (width == bitmap.getWidth() && height == bitmap.getHeight())
            return bitmap;
        Bitmap target = Bitmap.createBitmap(width, height,
                getConfig(bitmap));
        Canvas canvas = new Canvas(target);
        canvas.scale(scale, scale);
        Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG
                | Paint.DITHER_FLAG);
        canvas.drawBitmap(bitmap, 0, 0, paint);
        if (recycle)
            bitmap.recycle();
        return target;
    }

    private static Bitmap.Config getConfig(Bitmap bitmap) {
        Bitmap.Config config = bitmap.getConfig();
        if (config == null) {
            config = Bitmap.Config.ARGB_8888;
        }
        return config;
    }
}

Related

1. resize(Bitmap bitmap, int newWidth, int newHeight)
2. resizeAndCropCenter(Bitmap bitmap, int size, boolean recycle)
3. resizeAndCropCenter(final Bitmap bitmap, final int size)
4. resizeBitmap(Context context, int resId, int w, int h)
5. resizeBitmapByScale(Bitmap bitmap, float scale, boolean recycle)
6. resizeDrawable(Context context, int resId, int w, int h)
7. resizePreviewBitmap(Bitmap bm, int width, int height)
8. smallImage(Bitmap bitmap, int Width, int Height)
9. zoomBitmap(Bitmap bgimage, int newWidth, int newHeight)