Android Bitmap Load decodeSampledBitmapFromBytes(byte[] res, int reqWidth, int reqHeight)

Description

decode Sampled Bitmap From Bytes

Declaration

public static Bitmap decodeSampledBitmapFromBytes(byte[] res,
            int reqWidth, int reqHeight) 

Method Source Code

//package com.java2s;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

public class Main {
    private static final int MAX_WIDTH = 480;
    private static final int MAX_HEIGHT = 800;

    public static Bitmap decodeSampledBitmapFromBytes(byte[] res,
            int reqWidth, int reqHeight) {
        if (reqWidth > MAX_WIDTH)
            reqWidth = MAX_WIDTH;//from w  w w  .jav a2  s  . c o  m
        if (reqHeight > MAX_HEIGHT)
            reqHeight = MAX_HEIGHT;

        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        options.inPurgeable = true;
        options.inInputShareable = true;
        BitmapFactory.decodeByteArray(res, 0, res.length, options);

        options.inSampleSize = calculateInSampleSize(options, reqWidth,
                reqHeight);

        options.inJustDecodeBounds = false;

        return BitmapFactory.decodeByteArray(res, 0, res.length, options);
    }

    private static int calculateInSampleSize(BitmapFactory.Options options,
            int reqWidth, int reqHeight) {
        final int height = options.outHeight;
        final int width = options.outWidth;
        int inSampleSize = 1;

        if (height > reqHeight || width > reqWidth) {
            if (width > height)
                inSampleSize = Math.round((float) height
                        / (float) reqHeight);
            else
                inSampleSize = Math.round((float) width / (float) reqWidth);
        }

        return inSampleSize;
    }
}

Related

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2. decodeBitmap(Resources res, int resId, int reqWidth, int reqHeight)
3. decodeFromFile(String path)
4. decodeFromFile(String path, int reqWidth, int reqHeight)
5. decodeSampledBitmapFileForSize(File f, int reqWidth, int reqHeight)
6. decodeSampledBitmapFromBytesForCurrentScreen( byte[] res, Context ctxt)
7. decodeSampledBitmapFromResource(Resources res, int resId, int reqWidth, int reqHeight)
8. decodeSampledBitmapFromUrl(URL url, int reqWidth, int reqHeight)
9. decodeSampledBitmapStreamForSize(InputStream is, int reqWidth, int reqHeight)