get Scaled Bitmap From Bitmap, keep ratio - Android Graphics

Android examples for Graphics:Bitmap Scale

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Description

get Scaled Bitmap From Bitmap, keep ratio

Demo Code

/*//  ww  w .ja  v  a 2  s . 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.
 */
//package com.java2s;

import android.graphics.Bitmap;

public class Main {
    public static Bitmap getScaledBitmapFromBitmap(Bitmap bmp,
            int maxWidth, int maxHeight, boolean keepAspectRatio,
            boolean freeOldBitmap) {
        if (keepAspectRatio) {
            float ratio = bmp.getWidth() == 0 ? 1.f
                    : (bmp.getWidth() / (float) bmp.getHeight());
            float newRatio = maxHeight == 0 ? 1.f
                    : (maxWidth / (float) maxHeight);

            if (newRatio > ratio) {
                maxWidth = (int) ((float) maxHeight * ratio);
            } else if (newRatio < ratio) {
                maxHeight = (int) ((float) maxWidth / ratio);
            }
        }

        Bitmap scaled = Bitmap.createScaledBitmap(bmp, maxWidth, maxHeight,
                true);

        if (freeOldBitmap && scaled != bmp) {
            bmp.recycle();
        }

        return scaled;
    }
}

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