Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

public class Main {
    public static Bitmap decodeSampledBitmapFromBitmap(Bitmap bitmap, int reqWidth, int reqHeight) {
        // Calculate inSampleSize
        final Options options = new Options();
        options.inSampleSize = calculateInSampleSize(bitmap.getWidth(), bitmap.getHeight(), reqWidth, reqHeight);
        // Decode bitmap with inSampleSize set
        options.inJustDecodeBounds = false;
        byte[] data = bitmap2Bytes(bitmap);
        if (data != null) {
            bitmap.recycle();
            return BitmapFactory.decodeByteArray(data, 0, data.length, options);
        } else {
            return bitmap;
        }
    }

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

        return calculateInSampleSize(width, height, reqWidth, reqHeight);
    }

    public static int calculateInSampleSize(int width, int height, int reqWidth, int reqHeight) {
        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;
    }

    private static byte[] bitmap2Bytes(Bitmap bm) {
        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
            byte[] bytes = baos.toByteArray();
            baos.close();
            return bytes;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}