Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

public class Main {
    public static Bitmap decodeBitmapFromResource(byte[] byteArray, int reqWidth) {

        // First decode with inJustDecodeBounds=true to check dimensions
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length, options);

        // Calculate inSampleSize
        options.inSampleSize = calculateInSampleSize(options, reqWidth);

        // Decode bitmap with inSampleSize set
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length, options);
    }

    public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth) {
        // Raw height and width of image
        final int width = options.outWidth;
        int inSampleSize = 1;

        if (width > reqWidth) {

            final int halfWidth = width / 2;

            // Calculate the largest inSampleSize value that is a power of 2 and keeps
            // width larger than the requested height and width.
            while ((halfWidth / inSampleSize) > reqWidth) {
                inSampleSize *= 2;
            }
        }

        return inSampleSize;
    }
}