Creates a android.graphics.Bitmap from raw image byte data. - Android Graphics

Android examples for Graphics:Bitmap Read

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Description

Creates a android.graphics.Bitmap from raw image byte data.

Demo Code

/*/*from   w ww .  ja  v a 2 s  .  co  m*/
 * Copyright 2014 Randomly Typing LLC
 *
 * 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.BitmapFactory;

public class Main {
    /**
     * Creates a {@link android.graphics.Bitmap} from raw image byte data. This will usually come
     * from a {@link android.hardware.Camera.PictureCallback} returning byte data from the {@link
     * android.hardware.Camera}.
     *
     * @param data   Image data as a byte array.
     * @param width  Requested width for the created {@link android.graphics.Bitmap}.
     * @param height Requested height for the created {@link android.graphics.Bitmap}.
     *
     * @return A {@link android.graphics.Bitmap} containing the given image data best fit to a given
     * width and height.
     */
    public static Bitmap bitmapFromRawBytes(byte[] data, int width,
            int height) {
        /*  Decode the dimensions of the bitmap data so we can determine a sample size that fits the
        requested width and height. */
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeByteArray(data, 0, data.length, options);
        final int actualWidth = options.outWidth;
        final int actualHeight = options.outHeight;

        // Calculate the sample size as power of 2 that will satisfy the requested width and height.
        int inSampleSize = 1;
        if (actualWidth > width || actualHeight > height) {
            int shift = 0;
            while ((actualWidth >> shift + 1) > width
                    && (actualHeight >> shift + 1) > height) {
                shift++;
            }
            if (shift > 0) {
                inSampleSize <<= shift;
            }
        }

        /*  Reset BitmapFactory options to actually decode the byte array at the calculated sample
        size. */
        options.inSampleSize = inSampleSize;
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeByteArray(data, 0, data.length, options);
    }
}

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