Android Open Source - khandroid Image Utils

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License

The source code is released under:

Apache License

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Java Source Code

/*
 * Copyright (C) 2012-2014 Ognyan Bankov
 *//  w w  w .  j  a va2  s.c o  m
 * 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.github.khandroid.misc;

import java.io.IOException;
import java.io.InputStream;

import android.content.Context;
import android.content.res.AssetManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;


public class ImageUtils {
    public static Bitmap bitmapResizeToMaxXorY(Bitmap srcBitmap, int maxSizeX, int maxSizeY) {
        Bitmap ret = null;

        if (srcBitmap != null && maxSizeX > 0 && maxSizeY > 0) {
            Float origSizeX = Float.valueOf(srcBitmap.getWidth());
            Float origSizeY = Float.valueOf(srcBitmap.getHeight());

            if (origSizeX > maxSizeX || origSizeY > maxSizeY) {
                float origRatio = origSizeX / origSizeY;
                float destRatio = maxSizeX / maxSizeY;

                float targetSizeX;
                float targetSizeY;

                if (origRatio >= destRatio) {
                    if (maxSizeX >= origSizeX) {
                        targetSizeX = origSizeX;
                    } else {
                        targetSizeX = maxSizeX;
                    }

                    targetSizeY = targetSizeX / origRatio;
                } else {
                    if (maxSizeY >= origSizeY) {
                        targetSizeY = origSizeY;
                    } else {
                        targetSizeY = maxSizeY;
                    }

                    targetSizeX = targetSizeY * origRatio;
                }

                ret = Bitmap.createScaledBitmap(srcBitmap,
                                                (int) targetSizeX,
                                                (int) targetSizeY,
                                                false);
            } else {
                // original image is smaller than destination sizes so we are returning original
                ret = srcBitmap;
            }
        }

        return ret;
    }


    public static Bitmap getBitmapFromAsset(Context context, String strName) throws IOException {
        AssetManager assetManager = context.getAssets();

        InputStream istr;
        Bitmap bitmap = null;

        istr = assetManager.open(strName);
        bitmap = BitmapFactory.decodeStream(istr);

        return bitmap;
    }


    @Deprecated
    public static Bitmap BitmapResizeToMaxXorY(Bitmap srcBitmap, int maxSizeX, int maxSizeY) {
        return bitmapResizeToMaxXorY(srcBitmap, maxSizeX, maxSizeY);
    }
}

Java Source Code List